Waterproof structure of roof photovoltaic power generation device
By designing a waterproof structure in the rooftop photovoltaic system, including a waterproof layer, drainage channels, and hydrophobic components, the problem of rainwater backflow is solved, achieving waterproofing and heat dissipation effects for the photovoltaic panels and ensuring the stable operation of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUNAN GELAITE NEW ENERGY DEV CO LTD
- Filing Date
- 2025-08-05
- Publication Date
- 2026-06-26
AI Technical Summary
Existing rooftop photovoltaic systems are prone to water backflow during rain, which can damage the photovoltaic panels and affect their performance.
A waterproof structure was designed, including a waterproof layer, a waterproof cavity, a drainage channel, a sealing ring, a hydrophobic component, and a drainage rib. By tilting the photovoltaic panels and using rubber mounting posts, rainwater is guided and drained, preventing water from soaking the photovoltaic panels.
It effectively prevents rainwater from soaking the photovoltaic panels, avoiding damage, ensuring the normal operation of the device on rainy days, and providing heat dissipation.
Smart Images

Figure CN224418761U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rooftop photovoltaic power generation technology, specifically a waterproof structure for a rooftop photovoltaic power generation device. Background Technology
[0002] Rooftop photovoltaic (PV) power generation, also known as rooftop solar photovoltaic (PV) power generation, is a type of photovoltaic system. The various components of this system include photovoltaic modules, installation systems, cables, solar inverters, and other electrical accessories. Rooftop PV systems on residential buildings typically have a capacity of approximately 5 to 20 kilowatts (kW), while rooftop PV systems installed on commercial buildings often reach 100 kilowatts or higher.
[0003] When installing common rooftop photovoltaic (PV) systems using brackets, these brackets typically only serve to secure the PV panels. If it rains, using ordinary brackets can easily lead to water backflow and soaking of the PV panels. Prolonged exposure to this condition can damage the PV panels and affect their normal performance.
[0004] Therefore, we propose a waterproof structure for rooftop photovoltaic power generation devices. Utility Model Content
[0005] The purpose of this invention is to provide a waterproof structure for a rooftop photovoltaic power generation device to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a waterproof structure for a rooftop photovoltaic power generation device, comprising a waterproof layer, four sets of mounting columns fixedly installed on the bottom wall of the waterproof layer, and waterproof cavities and waterproof components fixedly connected to the upper surfaces of the four sets of mounting columns respectively; the waterproof components are installed inside the waterproof cavities, and each waterproof component includes a guide channel formed in the bottom wall of the waterproof cavity, each guide channel penetrating all four sides of the waterproof cavity; a sealing ring and a hydrophobic component are fixedly connected to the upper surface of the waterproof cavity; the hydrophobic component is installed inside the waterproof layer, and the hydrophobic component includes several guide ribs installed on the bottom wall of the waterproof layer; the bottom wall of the waterproof layer is covered with a waterproof membrane.
[0007] Preferably, each of the waterproof cavities is equipped with a photovoltaic panel, and each waterproof cavity is tilted at 10 to 15 degrees toward the four corners of the waterproof layer, so that rainwater on the surface of the photovoltaic panel can smoothly slide into the interior of the waterproof layer.
[0008] Preferably, the bottom surface of the waterproof layer is fixedly installed with three first mounting legs. The bottom surfaces of the three first mounting legs are horizontal with the roof. The three first mounting legs are fixedly connected to the roof with screws to fix the position of the first mounting legs.
[0009] Preferably, a second mounting leg is fixedly connected to the upper surface of each of the first mounting legs, and each of the second mounting legs is fixedly connected to the bottom surface of the waterproof layer by screws, which is used to fix the position of the waterproof layer.
[0010] Preferably, each of the first mounting leg and the second mounting leg is L-shaped, which allows the first mounting leg to form a stable triangular force distribution when subjected to force.
[0011] Preferably, the mounting post is made of rubber and is deformable, allowing it to shake when rainwater hits the surface of the photovoltaic panel.
[0012] Preferably, a drainage port is fixedly connected to the right side of the waterproof layer. The right end of the drainage port is adapted to the drainage outlet of the roof. The drainage port is used to collect and guide rainwater.
[0013] This utility model has at least the following beneficial effects:
[0014] 1. When installing the entire device, first fix the first mounting leg to the roof with screws, then fix the second mounting leg to the bottom of the waterproof layer with screws. At this time, the weight of the waterproof layer itself will press on the second mounting leg, and the force between the second mounting leg and the first mounting leg will form a triangle, which can make the support of the first and second mounting legs for the waterproof layer more stable. Then, install the photovoltaic panel inside the waterproof cavity, and install the waterproof cavity on the bottom wall of the waterproof layer through the mounting column. At this time, if it rains, because the photovoltaic panel is tilted at a certain angle after installation, the rainwater will flow down the surface of the photovoltaic panel to the surface of the waterproof membrane. The waterproof membrane can play a waterproof role. The guide ribs can guide the rainwater to smoothly enter the interior of the guide port. Then, the drainage work is carried out through the drainage outlet of the roof. The mounting column can make the photovoltaic panel shake slightly when rainwater hits the surface of the photovoltaic panel, which can make the rainwater flow into the interior of the waterproof layer more smoothly.
[0015] By installing hydrophobic components, rainwater can be collected and drained in a timely manner, preventing excessive rainwater accumulation from soaking the photovoltaic panels and causing damage.
[0016] 2. After the device has been used for a long time, the sealing ring may age. If the sealing ring is not replaced in time, a large amount of rainwater will seep into the waterproof cavity, which may also soak the photovoltaic panel. At this time, the rainwater inside the waterproof cavity can be smoothly discharged through the set drainage channel, and the rainwater flows into the drainage port through the hydrophobic component. Then the sealing ring can be replaced or repaired separately.
[0017] By incorporating waterproof components, rainwater can be prevented from seeping into the waterproof cavity through the gap between the photovoltaic panel and the cavity if the sealing ring ages after prolonged use. This prevents the rainwater from soaking the photovoltaic panel. Furthermore, the drainage channels can dissipate heat from the photovoltaic panel during use. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a side view sectional structural diagram of the present invention;
[0020] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point A;
[0021] Figure 4 This is a schematic diagram of the overall structure of the waterproof cavity of this utility model;
[0022] Figure 5 This is a partial cross-sectional structural diagram of the waterproof cavity of this utility model;
[0023] Figure 6 This is a partial structural diagram of the first and second mounting legs of this utility model.
[0024] In the diagram: 1. Waterproof component; 2. Hydrophobic component; 3. Waterproof layer; 4. Guide rib; 5. Waterproof membrane; 6. Mounting column; 7. Waterproof cavity; 8. Photovoltaic panel; 9. Guide channel; 10. Sealing ring; 11. First mounting leg; 12. Second mounting leg; 13. Guide port. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] Please see Figures 1-6 This utility model provides a technical solution:
[0027] Example 1: A waterproof structure for a rooftop photovoltaic power generation device includes a waterproof layer 3. Four sets of mounting columns 6 are fixedly installed on the bottom wall of the waterproof layer 3. Waterproof cavities 7 and waterproof components 1 are fixedly connected to the upper surfaces of the four sets of mounting columns 6, respectively. The waterproof components 1 are installed inside the waterproof cavities 7 and include flow channels 9 formed in the bottom wall of the waterproof cavity 7. Each flow channel 9 penetrates all four sides of the waterproof cavity 7. A sealing ring 10 is fixedly connected to the upper surface of the waterproof cavity 7.
[0028] Each waterproof cavity 7 is equipped with a photovoltaic panel 8. Each waterproof cavity 7 is tilted at ten to fifteen degrees toward the four corners of the waterproof layer 3, so that rainwater on the surface of the photovoltaic panel 8 can smoothly slide into the interior of the waterproof layer 3.
[0029] After the device has been used for a long time, the sealing ring 10 may age. If the sealing ring 10 is not replaced in time, a large amount of rainwater will seep into the waterproof cavity 7, which may also soak the photovoltaic panel 8. At this time, the rainwater inside the waterproof cavity 7 can be smoothly discharged through the drainage channel 9 so that the rainwater flows into the drainage port 13 through the hydrophobic component 2. Then the sealing ring 10 can be replaced or repaired separately.
[0030] By setting up the waterproof component 1, rainwater can be prevented from flowing into the waterproof cavity 7 through the gap between the photovoltaic panel 8 and the waterproof cavity 7 after the device has been used for a long time if the sealing ring 10 ages. This can prevent the rainwater flowing into the waterproof cavity 7 from soaking the photovoltaic panel 8. In addition, the set guide channel 9 can dissipate heat from the photovoltaic panel 8 during use.
[0031] Example 2: Hydrophobic component 2; The hydrophobic component 2 is installed inside the waterproof layer 3. The hydrophobic component 2 includes several guide ribs 4 installed on the bottom wall of the waterproof layer 3. The bottom wall of the waterproof layer 3 is covered with a waterproof membrane 5.
[0032] Three first mounting legs 11 are fixedly installed on the bottom surface of the waterproof layer 3. The bottom surface of the three first mounting legs 11 is horizontal with the roof. The three first mounting legs 11 are all fixedly connected to the roof by screws, which are used to fix the position of the first mounting legs 11.
[0033] Each first mounting leg 11 has a second mounting leg 12 fixedly connected to its upper surface. Each second mounting leg 12 is fixedly connected to the bottom surface of the waterproof layer 3 by screws, which is used to fix the position of the waterproof layer 3.
[0034] Each of the first mounting leg 11 and the second mounting leg 12 is L-shaped, which allows the first mounting leg 11 to form a stable triangular force distribution when subjected to force.
[0035] The mounting column 6 is made of rubber and is deformable, which allows it to shake when rainwater hits the surface of the photovoltaic panel 8.
[0036] A drainage port 13 is fixedly connected to the right side of the waterproof layer 3. The right end of the drainage port 13 is adapted to the drainage outlet of the roof. The drainage port 13 is used to collect and guide rainwater.
[0037] When installing the entire device, firstly, fix the first mounting leg 11 to the roof with screws. Then, fix the second mounting leg 12 to the bottom surface of the waterproof layer 3 with screws. At this time, the weight of the waterproof layer 3 itself will press on the second mounting leg 12. The force between the second mounting leg 12 and the first mounting leg 11 forms a triangle, which makes the support of the first mounting leg 11 and the second mounting leg 12 for the waterproof layer 3 more stable. Next, install the photovoltaic panel 8 inside the waterproof cavity 7 and install the waterproof cavity 7 on the bottom wall of the waterproof layer 3 through the mounting column 6. At this time, if it rains... Due to the tilt of the photovoltaic panel 8 after installation, rainwater will flow from the surface of the photovoltaic panel 8 to the surface of the waterproof membrane 5. The waterproof membrane 5 provides waterproofing, and the guide ribs 4 guide the rainwater to flow smoothly into the drainage port 13. Then, the rainwater is drained through the roof's drainage outlet. The installation column 6 allows rainwater to fall on the surface of the photovoltaic panel 8, causing the photovoltaic panel 8 to sway slightly, which makes the rainwater flow more smoothly into the waterproof layer 3.
[0038] By setting up the hydrophobic component 2, rainwater can be collected and drained in a timely manner, preventing excessive rainwater accumulation from soaking the photovoltaic panel 8 and causing damage.
[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 process, method, article, or apparatus.
[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A waterproof structure for a rooftop photovoltaic power generation device, comprising a waterproof layer (3), characterized in that: The bottom wall of the waterproof layer (3) is fixedly installed with four sets of mounting columns (6), and the upper surfaces of the four sets of mounting columns (6) are respectively fixedly connected with waterproof cavities (7). Waterproof component (1); The waterproof component (1) is installed inside the waterproof cavity (7). The waterproof component (1) includes a guide groove (9) opened on the bottom wall of the waterproof cavity (7). Each guide groove (9) passes through the four sides of the waterproof cavity (7). A sealing ring (10) is fixedly connected to the upper surface of the waterproof cavity (7). Hydrophobic component (2); The hydrophobic component (2) is installed inside the waterproof layer (3), and the hydrophobic component (2) includes several guide ribs (4) installed on the bottom wall of the waterproof layer (3), and the bottom wall of the waterproof layer (3) is covered with waterproof membrane (5).
2. The waterproof structure of a rooftop photovoltaic power generation device according to claim 1, characterized in that: Each of the waterproof cavities (7) is equipped with a photovoltaic panel (8), and each of the waterproof cavities (7) is tilted at ten to fifteen degrees toward the four corners of the waterproof layer (3).
3. The waterproof structure of a rooftop photovoltaic power generation device according to claim 1, characterized in that: The bottom surface of the waterproof layer (3) is fixedly installed with three first mounting legs (11). The bottom surface of the three first mounting legs (11) is horizontal with the roof. The three first mounting legs (11) are all fixedly connected to the roof by screws.
4. The waterproof structure of a rooftop photovoltaic power generation device according to claim 3, characterized in that: Each of the first mounting legs (11) has a second mounting leg (12) fixedly connected to its upper surface, and each of the second mounting legs (12) is fixedly connected to the bottom surface of the waterproof layer (3) by screws.
5. The waterproof structure of a rooftop photovoltaic power generation device according to claim 4, characterized in that: Each of the first mounting leg (11) and the second mounting leg (12) is L-shaped.
6. The waterproof structure of a rooftop photovoltaic power generation device according to claim 1, characterized in that: The mounting post (6) is made of rubber and is deformable.
7. The waterproof structure of a rooftop photovoltaic power generation device according to claim 1, characterized in that: The right side of the waterproof layer (3) is fixedly connected to a drainage port (13), and the right end of the drainage port (13) is adapted to the drainage outlet of the roof.