Drainage arrangement for a distributed photovoltaic system

Abstract

The utility model relates to photovoltaic technical field, concretely relates to drainage device of distributed photovoltaic system, including photovoltaic module, still include drainage mechanism for installing at two photovoltaic module head -tail junction, the interval of two photovoltaic module is 0.5 5cm, and the drainage mechanism includes drainage component, and the drainage component is provided with water guide groove along its lateral direction, the drainage component extends outward along the both sides of water guide groove and forms first connecting piece and second connecting piece respectively, wherein first connecting piece installs in the lower surface of photovoltaic module above, and second connecting piece installs in the upper surface of photovoltaic module below. Through the implementation of the scheme, the waterproof effect of distributed photovoltaic system is improved and the construction difficulty is reduced.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic technology, specifically to a drainage device for distributed photovoltaic systems. Background Technology

[0002] Distributed photovoltaic (PV) systems are miniaturized, decentralized solar power generation systems, primarily installed on the user side (such as building rooftops, industrial and commercial plants, etc.). Building-integrated photovoltaics (BIPV) integrates PV modules into buildings, combining the advantages of architectural aesthetics and green energy to achieve the integration of PV power generation with building functionality. When PV modules are used as building roofs, their waterproofing and drainage performance are key performance indicators that require close attention. A PV module is a complete assembly formed by combining multiple solar cells in series and parallel, encapsulating them (covered with glass, EVA film, backsheet, etc.), and adding a frame. A PV roof is assembled from multiple PV modules; therefore, the connections between PV modules are a crucial indicator, serving both a connecting and fixing function and preventing leaks, otherwise, water seepage problems will occur inside the building. The main problem lies in the horizontal connection between photovoltaic modules, which is perpendicular to the direction of water flow. Water flow directly impacts this point, easily causing water accumulation and seepage. The traditional solution is to install adjacent photovoltaic modules as tightly as possible to improve their waterproof performance. However, this process is too complicated and difficult, requiring highly skilled construction workers.

[0003] Therefore, it is necessary to design a waterproof structure that reduces the difficulty of construction. Utility Model Content

[0004] The present invention aims to provide a drainage device for distributed photovoltaic systems to improve waterproofing and reduce construction difficulty.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a drainage device for a distributed photovoltaic system, including photovoltaic modules, and a drainage mechanism for installation at the connection point of two photovoltaic modules. The distance between the two photovoltaic modules is 0.5-5cm. The drainage mechanism includes a drainage component, on which a water guide groove is provided along its axial direction. The drainage component extends outward along both sides of the water guide groove to form a first connector and a second connector, wherein the first connector is installed on the lower surface of the upper photovoltaic module, and the second connector is installed on the upper surface of the lower photovoltaic module.

[0006] Preferably, as an improvement, the aluminum frame on the upper and lower sides of the photovoltaic module has an L-shaped cross-section, with one side of the aluminum frame located on the lower surface of the photovoltaic module and the other side located on the side end face of the photovoltaic module, and its height being less than the height of the side end face.

[0007] Preferably, as an improvement, the thickness of the second connector is 1-2 times the thickness of the aluminum frame.

[0008] Preferably, as an improvement, the depth of the guide water tank gradually increases from the middle to the end, with a variation range of 1cm-2cm.

[0009] Preferably, as an improvement, the drainage component is provided with a plurality of mounting parts for connecting to the photovoltaic bracket, the mounting parts including a mounting plate fixed to the lower side of the drainage component, the mounting plate being provided with mounting holes.

[0010] Preferably, as an improvement, the spacing between the upper and lower photovoltaic modules is 3-5cm.

[0011] Preferably, as an improvement, the first connector is attached to the aluminum frame, and the free end of the first connector protrudes upward to form a surrounding member. The height of the surrounding member is consistent with the thickness of the aluminum frame, and the surrounding member is attached to the end face of the aluminum frame.

[0012] The principles and advantages of this scheme are:

[0013] 1. In this solution, the applicant adopted a method opposite to the traditional one. Since there will always be a gap between two adjacent photovoltaic modules, the gap is utilized to install a drainage device. When water flows downward through the connection between the two photovoltaic modules, the seeping water can be directly discharged through the drainage device. This "drainage is worse than blocking" approach achieves the purpose of preventing water seepage and also reduces the difficulty of installation.

[0014] 2. This solution involves installing the first connector of the drainage component on the lower surface of the upper left photovoltaic module and the second connector on the upper surface of the lower right photovoltaic module. This achieves three effects simultaneously: 1) Effectively ensures the sealing between the drainage component and the lower photovoltaic module: Taking advantage of the photovoltaic module's sloping installation along the roof, the applicant installs the second connector on the upper surface of the lower photovoltaic module, so that the end of the lower photovoltaic module is surrounded by the drainage component. The only connection seam between the two faces to the lower right. Utilizing the principle of water flowing downhill, water flowing down from above flows directly downwards through this connection seam, preventing backflow and leakage; 2) Reduces the difficulty of sealing installation: No sealing treatment is required for the lower photovoltaic module and the second connector, greatly reducing installation difficulty; 3) The drainage component acts as an aluminum frame for the lower photovoltaic module, strengthening the reinforcement of the photovoltaic module.

[0015] 3. By designing the lower aluminum frame of the photovoltaic module in an L-shape, it is possible to ensure that the aluminum frame can fix the photovoltaic module, while not obstructing the water flow, allowing the water to drain quickly and avoiding dust residue that could affect power generation efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 for Figure 1 A magnified view of part A in the image.

[0018] The reference numerals in the accompanying drawings include: photovoltaic module 1, aluminum frame 2, drainage component 3, water guide channel 4, first connector 5, enclosure component 6, second connector 7, mounting plate 8, photovoltaic bracket 9. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method:

[0020] The basic implementation examples are as follows: Figure 1 , Figure 2 As shown: The drainage device of the distributed photovoltaic system includes photovoltaic modules 1 and a drainage mechanism for installation at the connection point between the ends of two photovoltaic modules 1. Specifically, the drainage mechanism is horizontally positioned between two adjacent rows of photovoltaic modules 1 (hereinafter, the photovoltaic module 1 located above is referred to as the upper photovoltaic module 1, and the photovoltaic module 1 located below is referred to as the lower photovoltaic module 1). The distance between the two photovoltaic modules 1 is 0.5-5cm. Within this range, both the installation area of ​​the photovoltaic modules 1 and the subsequent cleaning of the drainage mechanism are ensured. Specifically, when the distance between the two photovoltaic modules 1 is relatively small, such as 0.5-1cm, it helps to reduce the drainage burden on the drainage mechanism: when water flows downwards from the height of the photovoltaic modules 1, a small portion of the water flows into the drainage mechanism due to the height difference between the upper and lower photovoltaic modules 1, while the other portion flows directly across the drainage mechanism to the lower photovoltaic module 1. When the distance between the two photovoltaic modules 1 is relatively large, such as 3-5cm, it facilitates the installation of the drainage mechanism and the subsequent cleaning of the drainage mechanism. This embodiment prefers the latter.

[0021] Considering that when water flows from high to low along the photovoltaic module 1, the aluminum frame 2 around the photovoltaic module 1 causes rainwater to remain at the lowest aluminum frame 2 for a long time, resulting in soil residue at that location. This residue will block the solar cells, causing a hot spot effect and severely affecting the power generation efficiency.

[0022] To address this issue, this solution designs the cross-section of the aluminum frame 2 on both the top and bottom sides of the photovoltaic module 1 to be L-shaped. The lower side of the aluminum frame 2 is mounted on the lower surface of the photovoltaic module 1, and its upper side is mounted on the side end face of the photovoltaic module 1. The height of the upper side is less than the height of the side end face. In this embodiment, the height of the upper side is three-quarters of the thickness of the photovoltaic module 1. This design ensures that the aluminum frame 2 is fixed to the photovoltaic module 1 without obstructing water flow, allowing water to drain quickly and preventing dust residue from affecting power generation efficiency.

[0023] The drainage mechanism includes a drainage component 3, on which a water guide groove 4 is provided along its axial direction. The depth of the water guide groove 4 is 4-5cm, and the depth of the water guide groove 4 gradually increases from the middle to the end, varying from 1cm to 2cm. In this embodiment, it is 1.5cm. By setting the height difference of the water guide groove 4, the water accumulation in the water guide groove 4 can be accelerated, especially during heavy rain / storm seasons, it can accelerate the drainage of water in the water guide groove 4 to both ends, reducing the load on the drainage component 3. The drainage component 3 extends outward along both sides of the water guide groove 4 to form a first connector 5 and a second connector 7, respectively. The thickness of the second connector 7 is 1-2 times the thickness of the aluminum frame 2. The first connector 5 is installed on the lower surface of the upper left photovoltaic module 1, and the second connector 7 is installed on the upper surface of the lower right photovoltaic module 1. Specifically: the upper surface of the first connector 5 is attached to the lower surface of the aluminum frame 2. The free end of the first connector 5 protrudes upward to form a surrounding component 6. The height of the surrounding component 6 is the same as the thickness of the aluminum frame 2, and the right side of the surrounding component 6 is attached to the end face of the aluminum frame 2, while its upper side is attached to the photovoltaic module 1. The connections between the first connector 5 and the surrounding component 6 and the aluminum frame 2 and photovoltaic module 1 are fixed with sealant. In windy areas, bolts can be added for reinforcement. The second connector 7 and the photovoltaic module 1 below only need to be reinforced with bolts at the ends.

[0024] In this design, by installing the first connector 5 on the lower surface of the upper left photovoltaic module 1 and the second connector 7 on the upper right surface of the photovoltaic module 1, three effects can be achieved: 1. Reduced sealing installation difficulty: Since both are located on the top surface of the roof, it is necessary to ensure the sealing between them during installation to avoid the risk of water leakage. Initially, the two connectors of the drainage component 3 were installed on the lower surfaces of the upper and lower photovoltaic modules 1, requiring sealing treatment of their joints, which was a complex and time-consuming process. Later, it was considered to install the two connectors on the upper surfaces of the upper and lower photovoltaic modules 1, but the first connector 5 would obstruct the water flow of the photovoltaic module 1, which contradicts the L-shaped design of the aluminum frame 2. At the same time, its joint faces the water flow and therefore also requires sealing treatment. Finally, the above solution is adopted, eliminating the need for sealing treatment of the lower photovoltaic module 1 and the second connector 7, thus reducing the installation difficulty. 2. Effectively ensures the sealing of the drainage component 3 and the lower photovoltaic module 1: Taking into account the characteristic that the photovoltaic module 1 is installed at an angle along the roof, the applicant installed the second connector 7 on the upper surface of the lower photovoltaic module 1, so that the end of the lower photovoltaic module 1 is surrounded by the drainage component 3, and the only connection seam between the two faces to the lower right. In this way, taking advantage of the principle that water flows downhill, the water flowing down from above flows directly down through the connection seam, without backflowing upwards and causing leakage; 3. The drainage component 3 acts as the aluminum frame 2 of the lower photovoltaic module 1, which strengthens the reinforcement effect of the photovoltaic panel.

[0025] The drainage component 3 is provided with multiple mounting parts for connecting to the photovoltaic bracket 9. Each mounting part includes a mounting plate 8 fixed to the lower side of the drainage component 3, and the mounting plate 8 has mounting holes. During installation, the drainage component 3 is fixed to the photovoltaic bracket 9 by bolts passing through the mounting holes.

[0026] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A drainage device for a distributed photovoltaic system, comprising photovoltaic modules, characterized in that: It also includes a drainage mechanism for installation at the connection point of two photovoltaic modules. The distance between the two photovoltaic modules is 0.5-5cm. The drainage mechanism includes a drainage component with a water guide groove along its axial direction. The drainage component extends outward along both sides of the water guide groove to form a first connector and a second connector, respectively. The first connector is installed on the lower surface of the upper photovoltaic module, and the second connector is installed on the upper surface of the lower photovoltaic module.

2. The drainage device for a distributed photovoltaic system according to claim 1, characterized in that: The aluminum frame on the top and bottom sides of the photovoltaic module has an L-shaped cross-section. One side of the aluminum frame is located on the lower surface of the photovoltaic module, and the other side is located on the side end face of the photovoltaic module with a height less than that of the side end face.

3. The drainage device for a distributed photovoltaic system according to claim 2, characterized in that: The thickness of the second connector is 1-2 times the thickness of the aluminum frame.

4. The drainage device for a distributed photovoltaic system according to claim 3, characterized in that: The depth of the water guide channel gradually increases from the middle to the end, with a range of 1cm-2cm.

5. The drainage device for a distributed photovoltaic system according to claim 4, characterized in that: The drainage component is provided with multiple mounting parts for connecting to the photovoltaic bracket. Each mounting part includes a mounting plate fixed to the lower side of the drainage component, and the mounting plate is provided with mounting holes.

6. The drainage device for a distributed photovoltaic system according to claim 5, characterized in that: The distance between the two photovoltaic modules is 3-5cm.

7. The drainage device for a distributed photovoltaic system according to claim 6, characterized in that: The first connector is attached to the aluminum frame, and the free end of the first connector protrudes upward to form a surrounding component. The height of the surrounding component is the same as the thickness of the aluminum frame, and the surrounding component is attached to the end face of the aluminum frame.

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