CN112663877B

CN112663877B - A roof structure

Info

Publication number: CN112663877B
Application number: CN201910985068.2A
Authority: CN
Inventors: 贺迪; 李彦伯; 朱斌
Original assignee: Longi Solar Technology Co Ltd
Current assignee: Longi Solar Technology Co Ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2025-03-07
Anticipated expiration: 2039-10-16
Also published as: CN112663877A

Abstract

The invention provides a roof structure which comprises a roof purlin, a water tank and photovoltaic tiles, wherein the water tank is fixed above the roof purlin, the photovoltaic tiles are fixed on the water tank, each photovoltaic tile comprises a tile plate and a photovoltaic module, each tile plate comprises a bearing part and a bending structure which is positioned on two opposite sides of the bearing part, each bending structure comprises an extending part and a lap joint part, a first preset included angle is formed between each extending part and each lap joint part, the extending parts extend towards the direction of the roof purlin, the lap joint part of one photovoltaic tile and the lap joint part of the adjacent photovoltaic tile are mutually overlapped to form an overlap joint structure, the water tank is positioned between the adjacent photovoltaic tiles, and the overlap joint structure is fixedly arranged in the water tank.

Description

Roof structure

Technical Field

The invention relates to the technical field of photovoltaics, in particular to a roof structure.

Background

The building integrated photovoltaic (BIPV, building Integrated Photovoltaic) technology is a roofing technology that combines photovoltaic modules with building materials. The BIPV roofing structure is formed by installing photovoltaic tiles carrying the photovoltaic modules on the outer surface of the building roof so that the BIPV roofing structure can provide power for the room through the photovoltaic modules.

At present, when a plurality of photovoltaic modules are installed on a roof, joints are generated between adjacent photovoltaic modules, and sealing treatment is needed to be carried out on the joints in order to improve the waterproof performance of the BIPV roof structure. The current waterproof mode is to connect two adjacent photovoltaic tiles in the left-right direction in a buckling mode, namely, the side edge of one photovoltaic tile is buckled on the side edge of the other photovoltaic tile, and the two adjacent photovoltaic tiles are adhered up and down by using an adhesive tape, so that the aim of blocking rainwater from entering a roof is fulfilled.

However, in the current scheme, the adjacent photovoltaic tiles are connected in a buckling mode, a tiny gap is formed at the buckling connection position, water can slowly enter a room through the gap due to the siphon effect of water, and if the buckling is not tight, serious permeation problem can occur. After the photovoltaic tiles are bonded through the adhesive tape, the photovoltaic tiles are easy to tilt due to the fact that the bonding is not firm, and moisture enters the room from the tilt.

Disclosure of Invention

The invention provides a roof structure, which aims to solve the problem of poor waterproof performance of the roof structure in the prior art.

In order to solve the technical problems, the invention provides a roof structure, which comprises:

purlin, flume and photovoltaic tile; the water tank is fixed above the house purlin; the photovoltaic tile is fixed on the water tank;

the photovoltaic tile comprises a tile plate and a photovoltaic module, wherein the tile plate comprises a bearing part for bearing and fixing the photovoltaic module and bending structures positioned on two opposite sides of the bearing part;

the bending structure comprises an extending part and a lap joint part, one end of the extending part is connected with the side edge of the bearing part, the other end of the extending part is connected with one end of the lap joint part, a first preset included angle is formed between the extending part and the lap joint part, and the two extending parts extend towards the direction of the house purlin;

The overlapping part of one photovoltaic tile and the overlapping part of the adjacent other photovoltaic tile are overlapped mutually to form an overlapping structure, the water tank is positioned between the adjacent photovoltaic tiles, and the overlapping structure is fixedly arranged in the water tank.

Optionally, a protrusion is formed at the bottom of the water tank in a bending manner, and the lap joint structure is fixedly connected to the top surface of the protrusion.

Optionally, the overlapping portion has a recessed structure between the top surface of the protrusion and the extension portion;

The concave structure of one photovoltaic tile is positioned between one side edge of the water tank and the bulge;

the concave structure of the adjacent other photovoltaic tile is arranged between the other side edge of the water tank and the bulge.

Optionally, the roof structure further comprises two sink fasteners positioned on two sides of the sink;

one end of the water tank fastener is fixed on the purlin of the house;

the other end of the sink fastener jumps over the top end of the sink sidewall and extends between the extension and one of the sink sidewalls.

Optionally, one end of the sink fastener is fixedly arranged on the purlin of the house through a first tapping screw;

the end part of one end of the water tank fastener is provided with a first blank pressing structure.

Optionally, the roof structure further comprises a photovoltaic tile fastening mechanism;

The photovoltaic tile fastening mechanism comprises a first fastening unit and a second fastening unit;

The first fastening unit is fixed on the bulge of the water tank, one end of the first fastening unit is propped against the extending part of one photovoltaic tile, and the other end of the first fastening unit is propped against the extending part of the other photovoltaic tile;

The second fastening unit is fixed on the first fastening unit, one end of the second fastening unit is propped against the extending part of one photovoltaic tile, and the other end of the second fastening unit is propped against the extending part of the other photovoltaic tile.

Optionally, the lap joint structure and the first fastening unit are fixedly connected to the top surface of the protrusion through a second tapping screw.

The two surfaces of the first fastening unit are respectively provided with a first waterproof pad and a second waterproof pad, and the second tapping screw penetrates through the first waterproof pad and the second waterproof pad.

Optionally, the roof structure further comprises a waterproof covering mechanism;

The waterproof covering mechanism comprises a cover plate;

the cover plate is arranged at the notch of the water tank, two ends of the cover plate are respectively arranged on the two sides of the bearing part, and waterproof adhesive tapes are arranged between the two ends of the cover plate and the sides of the bearing part.

Optionally, a sealant layer is disposed between the overlapping portion of one photovoltaic tile and the overlapping portion of another photovoltaic tile.

Optionally, second binder structures are disposed on two other opposite sides of the bearing portion.

The invention provides a roof structure, wherein the bottom of a water tank can be used as a first layer of waterproof layer, the lap joint parts of two photovoltaic tiles are closely lapped to form a lap joint structure, and the lap joint structure is arranged in the water tank.

Drawings

FIG. 1 is a cross-sectional block diagram of a roofing structure according to an embodiment of the present invention;

fig. 2 is a perspective structure diagram of a photovoltaic tile according to an embodiment of the present invention;

FIG. 3 is a partial perspective view of a photovoltaic tile according to an embodiment of the present invention;

FIG. 4 is a perspective view of a roof structure according to an embodiment of the present invention;

fig. 5 is a perspective view of a photovoltaic tile fastening mechanism according to an embodiment of the present invention;

fig. 6 is a side structural view of a first fastening unit provided in an embodiment of the present invention;

fig. 7 is a front structural view of a second fastening unit provided in an embodiment of the present invention;

fig. 8 is a front structural view of a first fastening unit provided in an embodiment of the present invention;

Fig. 9 is a block diagram of a second edge pressing structure of a photovoltaic tile according to an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

A roofing structure provided by the present invention is described in detail below by way of a few specific examples.

Referring to fig. 1, a cross-sectional structural view of a roof structure according to an embodiment of the present invention is shown. The roof structure comprises a roof purlin 10, a water tank 20 and photovoltaic tiles 30, wherein the water tank 20 is fixed above the roof purlin 10, and the photovoltaic tiles 30 are fixed on the water tank 20.

With further reference to fig. 2, a perspective structure diagram of a photovoltaic tile provided by an embodiment of the present invention is shown. The photovoltaic tile 30 includes a tile 301, and a photovoltaic module 302.

With further reference to fig. 3, a partial block diagram of a photovoltaic tile according to an embodiment of the present invention is shown. The tile 301 comprises a bearing part 3011 for bearing and fixing the photovoltaic module 302, and bending structures 3012 located on two opposite sides of the bearing part 3011, wherein each bending structure 3012 comprises an extending part A and a lap joint part B, one end of each extending part A is connected with one side of the bearing part 3011, the other end of each extending part A is connected with one end of each lap joint part B, a first preset included angle is formed between each extending part A and each lap joint part B, and the two extending parts A extend towards the purlin 10. The overlapping part B of one photovoltaic tile 30 and the overlapping part B of the adjacent other photovoltaic tile 30 are overlapped with each other to form an overlapping structure C, the water tank 20 is positioned between the adjacent photovoltaic tiles 30, and the overlapping structure C is fixedly arranged in the water tank 20.

In the embodiment of the invention, the photovoltaic tiles 30 are fixedly arranged on the purlin 10 to form a BIPV roof structure, and the photovoltaic tiles 30 play roles in covering a roof and generating photovoltaic power. Specifically, the photovoltaic tile 30 can also convert solar energy into electric energy through the photovoltaic module 302 and supply the electric energy for use on the basis of shielding the wind and rain.

Specifically, a plurality of photovoltaic tiles 30 are provided on the house purlin 10, and a water tank 20 is provided between adjacent photovoltaic tiles 30. In rainy and snowy days, the water tank 20 can collect water introduced into the adjacent photovoltaic tiles 30, and the collected water is discharged along the water tank 20 to play a role in roof drainage.

For BIPV roofing structures, it is often desirable for the BIPV roofing structure to have high water resistance to prevent water from entering the room through the connection between the photovoltaic tiles 30. In an embodiment of the present invention, the tile 301 of the photovoltaic tile 30 comprises a carrying portion 3011 for carrying the fixed photovoltaic module 302, and bending structures 3012 located at two opposite sides of the carrying portion 3011. When two adjacent tiles 301 are paved on the house purlin 10, the lap joint part B of one tile 301 and the lap joint part B of the other adjacent tile 301 are lapped mutually to form a lap joint structure C, and as the lap joint structure C is a structure formed by tightly lapping the two lap joint parts B, and only one lateral lap joint seam is arranged on one surface of the lap joint structure C, which is away from the house purlin 10, and as the two lap joint parts B are lapped tightly, the lap joint seam is smaller, thereby reducing the probability of water entering the house purlin 10 from the photovoltaic tiles 30 and improving the waterproof performance of the BIPV roof structure.

Referring to fig. 4, a perspective structural diagram of a roof structure according to an embodiment of the present invention is shown. In the embodiment of the present invention, the overlapping structure C may be disposed in the water tank 20, and the overlapping structure C may be spaced apart from the bottom of the water tank 20, and in addition, the overlapping structure C may be closely attached to the bottom of the water tank 20. In this design, two waterproof layers may be formed in the water tank 20, one layer being an upper waterproof layer D composed of the lap joint structure C and the extension portions a of the two tiles 301, and one layer being a lower waterproof layer E composed of the bottom of the water tank 20. Through two-layer waterproof layer, further improved BIPV roofing structure's waterproof guarantee.

Further, the photovoltaic module 302 disposed on the tile 301 may include a battery plate and a glass panel disposed on the battery plate, where the battery plate may convert the received solar energy into electrical energy, and the glass panel may cover the tile 301 easy to rust completely, so as to prolong the service life of the photovoltaic tile 30.

Further, referring to fig. 1, the photovoltaic tile 30 adopts a lower bending structure, so that a heat dissipation channel 303 is formed between the photovoltaic tile 30 and the purlin 10, and when the photovoltaic tile 30 generates serious heat in summer or generates large heat during long-time working, the heat can be discharged from the heat dissipation channel 303, so that the heat dissipation performance of the photovoltaic tile 30 is improved, and the power generation efficiency of the photovoltaic tile 30 is higher.

Alternatively, the tile 301 of the photovoltaic tile 30 may be made of a metal material, such as a magnesium-plated aluminum-zinc plate, an aluminum-plated zinc plate, an aluminum alloy, stainless steel, or the like. In addition, other materials, such as fluorocarbon plates, may be used for the tile 301 of the photovoltaic tile 30.

In summary, according to the roof structure provided by the embodiment of the invention, the bottom of the water tank can be used as the first layer of waterproof layer, the lap joint parts of the two photovoltaic tiles are closely lapped to form the lap joint structure, and the lap joint structure is arranged in the water tank.

Alternatively, referring to fig. 1, a protrusion 201 is formed at the bottom of the tub 20 by bending, and a lap joint structure C is fixedly coupled to the top surface of the protrusion 201.

In the embodiment of the present invention, since the overlapping structure C formed by the two photovoltaic tiles 30 is spaced from the bottom of the water tank 20, in order to ensure the connection fastening degree between the overlapping structure C and the water tank 20, a protrusion 201 may be formed by bending at the bottom of the water tank 20, and the overlapping structure C may be fixedly connected to the top surface of the protrusion 201.

Alternatively, referring to fig. 1, the overlap B has a concave structure B1 between the top surface of the protrusion 201 and the extension a, the concave structure B1 of one photovoltaic tile 30 is located between one side of the water tank 20 and the protrusion 201, and the concave structure B1 of the adjacent other photovoltaic tile 30 is disposed between the other side of the water tank 20 and the protrusion 201.

In the embodiment of the invention, since the overlapping portion B of each tile 301 has a concave structure B1 that is concave toward the purlin 10, when the tiles 301 of two adjacent photovoltaic tiles 30 are overlapped with each other and are installed on the purlin 10, the concave structure B1 can be disposed between the side edge of the water tank 20 and the protrusions 201, so that the space formed between the side edge of the water tank 20 and the protrusions 201 can limit the tile 301 of the photovoltaic tile 30, further improving the anti-wind-break strength of the photovoltaic tile 30, and reducing the relative displacement between the photovoltaic tile 30 and the water tank 20. In addition, two concave structures B1 can also form two diversion cavities in the upper waterproof layer D, so that the drainage efficiency of the roof structure is improved.

Specifically, referring to FIG. 3, the lap joint part B comprises a first subsection B1, a second subsection B2, a third subsection B3 and a fourth subsection B4 which are sequentially connected, wherein a first preset included angle is formed between the first subsection B1 and the extension part A, a second preset included angle is formed between the first subsection B1 and the second subsection B2, a second preset included angle is formed between the second subsection B2 and the third subsection B3, and a second preset included angle is formed between the third subsection B3 and the fourth subsection B4, and is larger than or equal to 90 degrees. When the overlapping portion B of one photovoltaic tile 30 overlaps the overlapping portion B of the adjacent other photovoltaic tile 30, the second portion B2 of the one photovoltaic tile 30 contacts the fourth portion B4 of the other photovoltaic tile 30, the third portion B3 of the one photovoltaic tile 30 contacts the third portion B3 of the other photovoltaic tile 30, and the fourth portion B4 of the one photovoltaic tile 30 contacts the second portion B2 of the other photovoltaic tile 30. Through the close fitting of each subsection between the lap joint parts B of two adjacent photovoltaic tiles 30, the tightness of the lap joint structure C is enhanced, and the waterproof performance of the lap joint structure C can be effectively improved.

Optionally, referring to FIG. 1, the roofing structure further includes two basin fasteners 40 positioned on either side of basin 20, one end of basin fastener 40 being secured to the purlin 10, the other end of basin fastener 40 being clear of the top end of the side wall of basin 20 and extending between extension A and one of the inner side walls of basin 20.

Alternatively, one end of the basin fastener 40 is fixedly secured to the purlin 10 by a first self-tapping screw 401, and the end of one end of the basin fastener 40 is provided with a first binder structure 402. Specifically, since the length of the sink 20 is long, and in actual circumstances, the length of the sink fastener 40 is much smaller than the length of the sink 20, multiple sets of sink fasteners 40 may be disposed along the length direction of the sink 20, and adjacent sink fasteners 40 may be spaced apart by a predetermined distance, so as to fix the sink 20 to the house purlin 10 by the multiple sets of sink fasteners 40.

In practical application, if the water tank 20 is directly screwed to the house purlin 10, the water tank 20 is displaced from the screw holes by wind force in windy weather, so that the screw holes shear the screws, resulting in shearing of the screws and structural damage. In order to avoid a large relative displacement between the sink 20 and the screw hole, the embodiment of the present invention is specifically implemented by using two sink fasteners 40, one end of each sink fastener 40 is fixed to the purlin 10 by a first tapping screw 401, and the other end of each sink fastener extends over the top end of the side wall of the sink 20 and between the extension a and one inner side wall of the sink 20, so as to tightly clamp the sink 20. Wherein, self-tapping screw, also called fast tooth screw, is a fast-assembling fastener of steel passivated by surface galvanization.

Further, the end of one end of the sink fastener 40 is provided with the first binder structure 402, and the first binder structure 402 is exposed to the outside to form a smooth arc structure, so that moisture can be prevented from gathering at the location, and one end of the sink fastener 40 is effectively prevented from rusting.

Optionally, referring to FIG. 1, the roofing structure further includes a photovoltaic tile securing mechanism 50. Specifically, with further reference to FIG. 5, the photovoltaic tile fastening mechanism 50 comprises a first fastening unit 501 and a second fastening unit 502, wherein the first fastening unit 501 is fixed on the protrusion 201 of the water tank 20, one end of the first fastening unit 501 is pressed against the extending portion A of one photovoltaic tile 30, the other end is pressed against the extending portion A of the other photovoltaic tile 30, the second fastening unit 502 is fixed on the first fastening unit 501, and one end of the second fastening unit 502 is pressed against the extending portion A of one photovoltaic tile 30, and the other end is pressed against the extending portion A of the other photovoltaic tile 30. More specifically, the first fastening unit is pressed against the extension portion in a lower position, and the second fastening unit is pressed against the extension portion in an upper position.

In addition, since the lengths of the water tank 20 and the photovoltaic tile 30 are long, and in actual circumstances, the length of the photovoltaic tile fastening mechanism 50 is much smaller than the length of the photovoltaic tile 30, multiple groups of photovoltaic tile fastening mechanisms 50 can be arranged in the length direction of the photovoltaic tile 30, and adjacent photovoltaic tile fastening mechanisms 50 can be spaced by a preset distance to fix the water tank 20 and the photovoltaic tile 30 through the multiple groups of photovoltaic tile fastening mechanisms 50.

Alternatively, the lap joint structure C is fixedly coupled to the top surface of the boss 201 by the second tapping screw 503 with the first fastening unit 501.

In the embodiment of the invention, in order to further improve the fastening degree between the photovoltaic tile 30 and the water tank 20 and avoid larger relative displacement between the photovoltaic tile 30 and the water tank 20 in windy weather, the photovoltaic tile fastening mechanism 50 can be used for limiting the photovoltaic tile 30 and the water tank 20. Specifically, the second tapping screw 503 may sequentially penetrate through the lower portion of the first fastening unit 501, the lap joint structure C formed by lap joint of two adjacent photovoltaic tiles 30, and the protrusion 201 of the water tank 20, so that a fixed connection is formed among the photovoltaic tile fastening mechanism 50, the water tank 20, and the lap joint structure C.

In addition, the protrusion 201 at the bottom of the water tank 20 is higher than other areas of the bottom of the water tank 20 on the one hand, so that water is prevented from soaking into the second tapping screw 503 to prevent water seepage. On the other hand, the protrusion 201 may form a space for accommodating the second tapping screw 503, preventing the tip of the second tapping screw 503 from being nailed to another object, while increasing the pullout resistance of the second tapping screw 503.

Further, referring to fig. 5, two opposite sides of the lower portion of the first fastening unit 501 are provided with two upward turned-up pressing portions, one pressing portion for pressing against the lower side of the extension portion a of one photovoltaic tile 30, and the other pressing portion for pressing against the lower side of the extension portion a of the other photovoltaic tile 30 to firmly fix the extension portion a of the photovoltaic tile 30 with the side of the water tank 20. In addition, since the water tank 20 generally has a certain depth, the first fastening unit 501 can firmly fix the lower side of the extension a of the photovoltaic tile 30 with the lower side of the water tank 20. In order to firmly fix the upper side of the extension a of the photovoltaic tile 30 with the upper side of the water tank 20, two pressing parts turned up, one for pressing against the upper side of the extension a of one photovoltaic tile 30 and the other for pressing against the upper side of the extension a of the other photovoltaic tile 30, may be provided at two opposite sides of the second fastening unit 502 fixedly connected with the middle of the first fastening unit 501, so as to firmly fix the upper side of the extension a of the photovoltaic tile 30 with the upper side of the water tank 20.

Further, referring to fig. 6, a press-fit nut 5011 may be disposed at a middle portion of the first fastening unit 501, referring to fig. 7, a bolt 5021 may be correspondingly disposed on the second fastening unit 502, and the second fastening unit 502 may be fixedly disposed at the middle portion of the first fastening unit 501 through connection of the bolt 5021 and the press-fit nut 5011.

Alternatively, referring to fig. 8, both surfaces of the first fastening unit 501 are provided with a first waterproof pad 5013 and a second waterproof pad 5014, respectively, and the second tapping screw 503 passes through the first waterproof pad 5013 and the second waterproof pad 5014.

In the embodiment of the present invention, in order to improve the waterproof sealability of the roofing structure, the first waterproof pad 5013 and the second waterproof pad 5014 may be respectively provided at both surfaces of the first fastening unit 501 to enhance the waterproof performance at the position of the second tapping screw 503.

Optionally, referring to fig. 1, the roof structure further includes a cover plate 60, wherein the cover plate 60 is disposed at a notch of the water tank 20, two ends of the cover plate 60 are respectively disposed at side edges of the two bearing portions 3011, and a waterproof adhesive tape 601 is disposed between two ends of the cover plate 60 and the side edges of the bearing portions 3011.

In the embodiment of the invention, the notch of the water tank 20 can be further provided with the cover plate 60, and the cover plate 60 can block a large amount of rainwater outside the water tank 20 to play a role in water prevention. Specifically, further referring to fig. 5, a first fastening structure 5012 may be further disposed on the upper portion of the first fastening unit 501, and a second fastening structure 602 corresponding to the first fastening structure 5012 may be disposed on a surface of the cover plate 60 facing the purlin 10, and the cover plate 60 may be stably fixed to the notch of the water tank 20 through the first fastening structure 5012 and the second fastening structure 602. In addition, the cover plate 60 may be fixed to the notch of the water tank 20 by gluing, which is not limited in the embodiment of the present invention.

In one implementation of the embodiment of the present invention, a metal grid member may also be disposed on the surface of the photovoltaic tile 30, so that the metal grid member serves as a temporary operation and maintenance channel, and is convenient for maintenance personnel to maintain the roof structure. Specifically, a limiting groove can be formed in one face, deviating from the purlin 10, of the cover plate 60, and a supporting leg portion of one metal grid piece is arranged in the limiting groove, a supporting leg portion of another adjacent metal grid piece is also arranged in the limiting groove, and the width of the limiting groove is just equal to the sum of the widths of the two supporting leg portions, so that the limiting groove on the cover plate 60 can play a role in limiting the metal grid piece, the metal grid piece is prevented from sliding greatly, and the stability of a temporary operation and maintenance channel is improved.

Further, referring to fig. 1, a waterproof adhesive tape 601 is disposed between the two ends of the cover plate 60 and the side edges of the bearing portion 3011, and the waterproof adhesive tape 601 can effectively prevent moisture from penetrating between the two ends of the cover plate 60 and the side edges of the bearing portion 3011, so that the waterproof sealing performance of the roof structure is improved.

Optionally, a sealant layer is disposed between the overlapping portion B of one photovoltaic tile 30 and the overlapping portion B of another photovoltaic tile 30, the sealant layer may be a butyl self-adhesive sealant layer, and the butyl self-adhesive sealant layer may effectively prevent moisture from penetrating between the overlapping portion B of one photovoltaic tile 30 and the overlapping portion B of another photovoltaic tile 30, so that waterproof sealing performance of the roof structure is further improved.

Alternatively, referring to fig. 9, second binder structures F are provided on the other two opposite sides of the carrying portion 3011. The second binder structure F is exposed to the outside to form a smooth arc structure, which can prevent moisture from collecting therein and effectively prevent the other two opposite sides of the carrying portion 3011 from rusting.

In summary, the bottom of the water tank can be used as the first layer waterproof layer, the lap joint part of the two photovoltaic tiles is tightly lapped to form a lap joint structure, and the lap joint structure is arranged in the water tank.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. A roof structure is characterized by comprising a roof purlin, a water tank and photovoltaic tiles, wherein the water tank is fixed above the roof purlin;

2. The roof structure of claim 1, wherein a protrusion is formed at a bottom of the water tank by bending, and the overlap structure is fixedly connected to a top surface of the protrusion.

3. The roofing structure of claim 2 wherein the overlap has a recessed configuration between the top surface of the protrusion and the extension;

4. The roofing structure of claim 1 further comprising two basin fasteners on either side of the basin;

one end of the water tank fastener is fixed on the purlin of the house;

5. The roofing structure of claim 4 wherein one end of the basin fastener is fixedly secured to the purlin by a first self-tapping screw;

6. The roofing structure of claim 2 further comprising a photovoltaic tile securing mechanism;

7. The roofing structure of claim 6 wherein,

The lap joint structure and the first fastening unit are fixedly connected to the top surface of the bulge through a second self-tapping screw;

8. The roofing structure of claim 1 wherein the roofing structure further comprises a deck;

9. The roofing structure of claim 1 wherein a sealant layer is disposed between the overlap of one of the photovoltaic tiles and the overlap of the other of the photovoltaic tiles.

10. A roof structure according to claim 1, wherein a second binder structure is provided on the other two opposite sides of the load-bearing portion.