Green building photovoltaic roof structure
The motor-driven cleaning system and liquid collection tank design solve the problem of dust accumulation on the surface of photovoltaic panels, achieving automated cleaning and wetting effects and improving the power generation efficiency of photovoltaic roof structures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CCCC FOURTH HIGHWAY ENG CO LTD
- Filing Date
- 2025-05-25
- Publication Date
- 2026-05-12
AI Technical Summary
The photovoltaic panels on existing photovoltaic roof structures accumulate a large amount of dust, which affects power generation efficiency.
Design a green building photovoltaic roof structure that uses a motor-driven lead screw to drive the mounting frame and cleaning strip, combined with a liquid collection tank, drainage pipe and liquid replenishment pipe to achieve automatic cleaning and moistening of the cleaning strip, and use rainwater or external water source to ensure cleaning effect.
It effectively removes dust from the surface of photovoltaic panels, ensuring power generation efficiency and adapting to cleaning needs under different weather conditions.
Smart Images

Figure CN224228138U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a roof structure, specifically a green building photovoltaic roof structure. Background Technology
[0002] Green buildings refer to buildings that, throughout their entire life cycle, maximize the conservation of energy, land, water, and other materials, protect the environment, reduce pollution, and provide people with healthy, comfortable, and efficient living spaces while achieving harmonious coexistence with nature through scientific planning and innovative technologies. Green buildings typically install photovoltaic panels on their roofs to save electricity, and are also known as photovoltaic roof structures.
[0003] Currently, as shown in the attached document Figure 4 The photovoltaic panels in the existing photovoltaic roof structure accumulate a lot of dust on their surface, which greatly affects the power generation efficiency of the photovoltaic panels. Therefore, this application proposes a green building photovoltaic roof structure to solve this problem. Utility Model Content
[0004] The purpose of this utility model is to provide a green building photovoltaic roof structure to solve the problem mentioned in the background art that the surface of the photovoltaic panels in the existing photovoltaic roof structure will accumulate a lot of dust, which will greatly affect the power generation effect of the photovoltaic panels.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A green building photovoltaic roof structure includes a roof. A box is fixedly installed on the top of the roof. A liquid collection tank is opened inside the box. An installation groove is opened on one side of the box. A motor is fixedly installed inside one side of the installation groove. A lead screw is fixedly installed on the output shaft of the motor. A guide rod is fixedly installed on the rear side of one side of the box. An installation frame is provided on the outer side of the guide rod and the lead screw. The installation frame is threadedly connected to the lead screw and slidably connected to the guide rod. A cleaning strip is fixedly installed at the bottom of the installation frame. A fixing block is fixedly installed on the top of the roof. A photovoltaic panel is fixedly installed on the top of the fixing block. The bottom of the cleaning strip is attached to the top of the photovoltaic panel. A drain pipe is fixedly installed on one side of the box. A solenoid valve is fixedly installed on the drain pipe. Several second branch pipes are fixedly installed on one side of the drain pipe.
[0007] As a further embodiment of this utility model: a support frame is fixedly installed on the top of the roof, a liquid replenishment pipe is fixedly installed inside the support frame, the liquid replenishment pipe is connected to an external water source, a first branch pipe is fixedly installed on one side of the liquid replenishment pipe, the first branch pipe is inserted into the liquid collection tank and connected to the liquid collection tank.
[0008] As a further improvement of this utility model, the top of the box body is provided with several water-permeable grooves.
[0009] As a further improvement of this invention, a liquid level sensor is fixedly installed on the bottom side of the inside of the liquid collection tank.
[0010] As a further improvement of this utility model, the motor, solenoid valve and liquid level sensor are all electrically connected to the indoor controller via wires.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] 1. This utility model uses a motor to drive a lead screw to rotate, thereby installing the mounting bracket with its outer threaded connection and the cleaning strip at its bottom. Under the guidance of the guide rod, the cleaning strip moves along the direction of the lead screw. In conjunction with the water inside the liquid collection tank, the cleaning strip is moistened, thus achieving the effect of cleaning the surface of the photovoltaic panel.
[0013] 2. This utility model can achieve the cleaning effect by wetting the cleaning strip in rainy weather, when there is water in the collection tank but no rain, or when there is no water in the collection tank but no rain. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of this utility model.
[0015] Figure 2 This is a partial structural diagram of the present invention.
[0016] Figure 3 This is a partial structural diagram of the present invention.
[0017] Figure 4 The image shown is a physical illustration of the prior art in this utility model.
[0018] 1. Lead screw; 2. Roof; 3. Photovoltaic panel; 4. Mounting groove; 5. Support frame; 6. First branch pipe; 7. Motor; 8. Mounting bracket; 9. Fixing block; 10. Box body; 11. Guide rod; 12. Cleaning strip; 13. Drain pipe; 14. Second branch pipe; 15. Water permeable trough; 16. Liquid replenishment pipe; 17. Liquid collection tank; 18. Liquid level sensor. Detailed Implementation
[0019] 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.
[0020] Please see Figures 1-4In this embodiment of the utility model, a green building photovoltaic roof structure includes a roof 2. A box 10 is fixedly installed on the top of the roof 2. A liquid collection tank 17 is opened inside the box 10. An installation groove 4 is opened on one side of the box 10. A motor 7 is fixedly installed on one side of the installation groove 4. A lead screw 1 is fixedly installed on the output shaft of the motor 7. A guide rod 11 is fixedly installed on the rear side of one side of the box 10. An installation frame 8 is provided on the outer side of the guide rod 11 and the lead screw 1. The installation frame 8 is threadedly connected to the lead screw 1 and slidably connected to the guide rod 11. A cleaning strip 12 is fixedly installed at the bottom of the installation frame 8. A fixing block 9 is fixedly installed on the top of the roof 2. A photovoltaic panel 3 is fixedly installed on the top of the fixing block 9. The bottom of the cleaning strip 12 is attached to the top of the photovoltaic panel 3. A drain pipe 13 is fixedly installed on one side of the box 10. A solenoid valve is fixedly installed on the drain pipe 13. Several second branch pipes 14 are fixedly installed on one side of the drain pipe 13.
[0021] A support frame 5 is fixedly installed on the top of the roof 2. A liquid replenishment pipe 16 is fixedly installed inside the support frame 5. The liquid replenishment pipe 16 is connected to an external water source. A first branch pipe 6 is fixedly installed on one side of the liquid replenishment pipe 16. The first branch pipe 6 is inserted into the liquid collection tank 17 and connected to the liquid collection tank 17. It is used to replenish the liquid collection tank 17 when it is not raining and there is not enough water in the liquid collection tank 17.
[0022] The top of the box 10 has several permeable grooves 15, which enable rainwater to be collected.
[0023] A liquid level sensor 18 is fixedly installed on the bottom side of the inside of the liquid collection tank 17 to monitor the water level inside the liquid collection tank 17.
[0024] The motor 7, solenoid valve and liquid level sensor 18 are all electrically connected to the indoor controller via wires.
[0025] The working principle of this utility model is as follows:
[0026] In use, this utility model features a photovoltaic panel 3 installed on the roof 2. The photovoltaic panel 3, in conjunction with other photovoltaic modules, generates electricity. Periodically, the motor 7 is started, driving the lead screw 1 to rotate. The lead screw 1 then drives the mounting bracket 8, which is threaded onto its outer side, to move above the photovoltaic panel 3 along the direction of the lead screw 1, guided by the guide rod 11. The mounting bracket 5 drives the cleaning strip 12 at its bottom to move synchronously with the photovoltaic panel 3. The bottom of the cleaning strip 12 contacts the surface of the photovoltaic panel 3, thus cleaning the surface of the photovoltaic panel 3. If it rains on the day the motor 7 is started, the photovoltaic panel 3 will generate electricity. Simply connect the starter motor 7. If it doesn't rain on the day the starter motor 7 is activated, but rainwater is collected inside the collection tank 17 through the permeable channel 15, open the valve on the drain pipe 13 to discharge some rainwater for cleaning the surface of the photovoltaic panel 3. If it doesn't rain on the day the starter motor 7 is activated and the liquid level sensor 18 detects that there is not enough rainwater inside the collection tank 17, open the water source connected to the replenishment pipe 16 and replenish water into the collection tank 17 through the replenishment pipe 16. This ensures that there is water to wet the cleaning strip 12 under different circumstances, thus ensuring the cleaning effect on the photovoltaic panel 3.
[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A green building photovoltaic roof structure, comprising a roof (2), characterized in that: A box (10) is fixedly installed on the top of the roof (2). A liquid collection tank (17) is provided inside the box (10). An installation groove (4) is provided on one side of the box (10). A motor (7) is fixedly installed on one side of the installation groove (4). A lead screw (1) is fixedly installed on the output shaft of the motor (7). A guide rod (11) is fixedly installed on the rear side of one side of the box (10). An installation bracket (8) is provided on the outer side of the guide rod (11) and the lead screw (1). The installation bracket (8) is threaded with the lead screw (1). The mounting bracket (8) is connected and slidably connected to the guide rod (11). A cleaning strip (12) is fixedly installed at the bottom of the mounting bracket (8). A fixing block (9) is fixedly installed at the top of the roof (2). A photovoltaic panel (3) is fixedly installed at the top of the fixing block (9). The bottom of the cleaning strip (12) is attached to the top of the photovoltaic panel (3). A drain pipe (13) is fixedly installed on one side of the box (10). A solenoid valve is fixedly installed on the drain pipe (13). Several second branch pipes (14) are fixedly installed on one side of the drain pipe (13).
2. The green building photovoltaic roof structure according to claim 1, characterized in that: A support frame (5) is fixedly installed on the top of the roof (2). A liquid replenishment pipe (16) is fixedly installed inside the support frame (5). The liquid replenishment pipe (16) is connected to an external water source. A first branch pipe (6) is fixedly installed on one side of the liquid replenishment pipe (16). The first branch pipe (6) is inserted into the liquid collection tank (17) and is connected to the liquid collection tank (17).
3. The green building photovoltaic roof structure according to claim 1, characterized in that: The top of the box (10) is provided with several water-permeable grooves (15).
4. The green building photovoltaic roof structure according to claim 1, characterized in that: A liquid level sensor (18) is fixedly installed on the bottom inside the liquid collection tank (17).
5. A green building photovoltaic roof structure according to claim 4, characterized in that: The motor (7), solenoid valve and liquid level sensor (18) are all electrically connected to the indoor controller via wires.