Automatic water flushing device for photovoltaic panel

Abstract

The utility model discloses an automatic water flushing device for a photovoltaic panel, which comprises the photovoltaic panel mounted on a bracket; the flushing device comprises a first flushing assembly and a second flushing assembly which are symmetrically arranged on the upper edge and the lower edge of the photovoltaic panel according to the installation angle of the photovoltaic panel, each flushing assembly comprises a flushing pipeline arranged along the upper edge of the photovoltaic panel, a plurality of water spraying openings are evenly formed in the flushing pipeline, and angle-adjustable nozzles are arranged in the water spraying openings and face the photovoltaic panel. A connector at one end of the flushing pipeline is connected with a water inlet hose; a control valve is arranged on the water inlet hose; and the PLC control system is used for controlling opening or closing of the first control valve and the second control valve according to a preset rule. The system is simple, the device is simple, the cost is low, and the system is suitable for a distributed photovoltaic power station.

Description

Technical Field

[0001] The utility model relates to the field of photovoltaic panel cleaning, in particular to an automatic water flushing device for photovoltaic panels. Background Art

[0002] With the proposal of my country's dual carbon goals, solar power generation has developed rapidly. By the end of 2023, the total installed capacity of solar power generation in the country will be about 610 million kilowatts, accounting for about 1 / 5 of the total installed capacity of the country. Photovoltaic panels generate electricity under the action of the photoelectric effect, and their power generation efficiency is greatly affected by the external environment. For example, dust covering the surface of the photovoltaic panel will cause a significant decrease in power generation efficiency. According to experimental measurements, dust accumulated on the glass surface will cause a loss of solar radiation of up to 30%. In order to ensure power generation efficiency, operation and maintenance personnel must clean the photovoltaic panels regularly.

[0003] At present, the basic cleaning methods are: manual cleaning (cleaning and high-pressure water washing); mechanical cleaning and robot cleaning. However, manual cleaning consumes a lot of manpower and takes a long time; mechanical cleaning is limited by location and cannot be performed on rooftops and high-altitude mountainous areas; robot cleaning requires the installation of a guide rail device, which is more complicated and requires more maintenance work.

[0004] In view of this, it is urgent to develop an automatic flushing system that can effectively improve the cleaning efficiency of photovoltaic panels and reduce the operating costs of power stations. Utility Model Content

[0005] The technical problem to be solved by the present application is that the long-term dust and dirt deposition on the surface of photovoltaic panels affects the power generation efficiency. Currently, the commonly used cleaning methods for photovoltaic panels either rely on manual labor or are expensive and complicated.

[0006] In order to solve the above technical problems, the present application provides an automatic water flushing device for photovoltaic panels, comprising: a photovoltaic panel, mounted on a bracket; a flushing device, comprising a first flushing component and a second flushing component symmetrically arranged at the upper and lower edges of the photovoltaic panel according to the installation angle of the photovoltaic panel, the first flushing component comprising a first flushing pipeline arranged along the upper edge of the photovoltaic panel, a plurality of water spray outlets evenly arranged on the first flushing pipeline, an adjustable angle nozzle arranged in the water spray outlet facing the photovoltaic panel, one end interface of the first flushing pipeline is connected to a first water inlet hose, and a first control valve is arranged on the water inlet hose; the second flushing component comprises a second flushing pipeline arranged along the lower edge of the photovoltaic panel, a plurality of water spray outlets evenly arranged on the second flushing pipeline, an adjustable angle nozzle arranged in the water spray outlet facing the photovoltaic panel, one end interface of the second flushing pipeline is connected to a second water inlet hose, and a second control valve is arranged on the second water inlet hose; a PLC control system, used to control the opening or closing of the first control valve and the second control valve according to a preset rule.

[0007] According to an embodiment of the present application, a booster water pump may also be provided between the water inlet hose and the flushing pipeline.

[0008] According to an embodiment of the present application, the booster water pump is a variable frequency water pump.

[0009] According to an embodiment of the present application, both the first control valve and the second control valve are solenoid valves, and the solenoid valves are connected to time relays.

[0010] According to an embodiment of the present application, the PLC control system is connected to the solenoid valve.

[0011] According to an embodiment of the present application, the water spray ports are arranged along the circumference of the flushing pipeline.

[0012] According to an embodiment of the present application, one end of the first water inlet hose and the second water inlet hose are connected to the municipal pipe network water supply pipeline or the domestic and fire-fighting water supply pipeline of the photovoltaic station.

[0013] According to an embodiment of the present application, a third flushing pipeline and a fourth flushing pipeline are respectively provided at the left edge and the right edge of the photovoltaic panel.

[0014] According to an embodiment of the present application, the surfaces of the first flushing pipeline and the second flushing pipeline are covered with a heat-insulating device, and the heat-insulating device includes a glass wool product and an external galvanized thin steel plate.

[0015] According to an embodiment of the present application, the bracket includes a front support plate, a rear support plate and a bottom connecting rod. The front support plate and the rear support plate are arranged perpendicular to the bottom surface, and the rear support plate is higher than the front support plate. The top ends of the front support plate and the rear support plate are provided with bearing grooves, and the bottom surface of the photovoltaic panel is provided with a protrusion arranged in the bearing groove, and the photovoltaic panel is mounted on the front support plate and the rear support plate.

[0016] Compared with the prior art, the technical solution of the present application has the following beneficial effects:

[0017] 1. The utility model has a simple system, simple device and low cost. The flushing part of the utility model adopts a mechanical structure, thereby avoiding complex circuit control and motor drive and reducing the occurrence rate of failure.

[0018] 2. The layout of the flushing pipeline can be adjusted according to the different layouts of the photovoltaic panels. At the same time, an adjustable angle nozzle is used. By setting the flushing components at the upper and lower edges of the photovoltaic panels, it not only avoids the shading effect of the automatic flushing system on the photovoltaic panels, but also ensures that the entire photovoltaic panel is flushed.

[0019] 3. In the utility model, two flushing pipelines are independently controlled, and the flushing sequence of different flushing pipelines is controlled by opening the first control valve and the second control valve in sequence to ensure the flushing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present application, rather than limiting the present application.

[0021] Figure 1 A top view of an automatic water flushing device for photovoltaic panels according to an example of the utility model;

[0022] Figure 2 A side view of an automatic water flushing device for photovoltaic panels according to an example of the present utility model.

[0023] The accompanying drawings are as follows:

[0024] 1. Photovoltaic panel, 2. Adjustable angle nozzle, 3. Bracket, 10. First flushing component, 11. First flushing pipeline, 12. First control valve, 13. First water inlet hose, 20. Second flushing component, 21. Second flushing pipeline, 22. Second control valve, 23. Second water inlet hose. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiment of the present application clearer, the technical scheme of the embodiment of the present application will be clearly and completely described in conjunction with the drawings of the embodiment of the present application. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. Based on the described embodiment of the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0026] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the patent application specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "an" do not indicate a quantity limitation, but indicate the existence of at least one.

[0027] like Figure 1 and Figure 2 As shown, the utility model application is an automatic water flushing device for photovoltaic panels, including a photovoltaic panel 1, a flushing device arranged along the edge of the photovoltaic panel 1 and a PLC control system. Compared with the prior art, the automatic flushing device of the present application has a simple structure, is easy to operate, has a low cost, and can ensure that the entire photovoltaic panel 1 can be fully covered and flushed.

[0028] In this embodiment, the photovoltaic panel 1 is installed on the bracket 3 .

[0029] Specifically, the bracket 3 includes a front support plate, a rear support plate and a bottom connecting rod. The front support plate and the rear support plate are arranged perpendicular to the bottom surface, and the rear support plate is higher than the front support plate. The top ends of the front support plate and the rear support plate are provided with bearing grooves, and the bottom surface of the photovoltaic panel 1 is provided with a protrusion arranged in the bearing groove, and the photovoltaic panel 1 is mounted on the front support plate and the rear support plate.

[0030] In this embodiment, the flushing device includes a first flushing component 10 and a second flushing component 20 which are symmetrically arranged at the upper edge and the lower edge of the photovoltaic panel 1 according to the installation angle of the photovoltaic panel 1 .

[0031] Specifically, the first flushing assembly 10 includes a first flushing pipeline 11 arranged along the upper edge of the photovoltaic panel 1, and a plurality of water spray outlets are evenly arranged on the first flushing pipeline 11, and an adjustable angle nozzle 2 is arranged in the water spray outlet facing the photovoltaic panel 1, and one end interface of the first flushing pipeline 11 is connected to a first water inlet hose 13, and a first control valve 12 is arranged on the water inlet hose. The second flushing assembly 20 includes a second flushing pipeline 21 arranged along the lower edge of the photovoltaic panel 1, and a plurality of water spray outlets are evenly arranged on the second flushing pipeline 21, and an adjustable angle nozzle is arranged in the water spray outlet facing the photovoltaic panel 1, and one end interface of the second flushing pipeline 21 is connected to a second water inlet hose 23, and a second control valve 22 is arranged on the second water inlet hose 23.

[0032] Furthermore, the adjustable angle nozzle 2 adopts a large flow nozzle, and the angle of the nozzle is adjusted according to the size of the photovoltaic panel 1 to ensure that the flushing area covers the entire photovoltaic panel 1. The water spray port is arranged along the circumference of the flushing pipeline, that is, the adjustable angle nozzle 2 can be overlapped on a circle to simplify the structure of the pipeline.

[0033] In this embodiment, the flushing part adopts a mechanical structure, thereby avoiding complex circuit control and motor drive, and reducing the failure rate. When flushing with water, the photovoltaic panel 1 can also be cleaned manually at regular intervals to increase the cleaning effect. According to the different arrangements of the photovoltaic panel 1, the arrangement of the flushing pipeline can be adjusted, and flushing pipelines on both sides of the photovoltaic panel 1 can also be added according to the flushing requirements. For example, the left edge and the right edge of the photovoltaic panel 1 can also be provided with a third flushing pipeline and a fourth flushing pipeline, respectively, to ensure that the entire photovoltaic panel 1 can be fully covered and flushed.

[0034] Furthermore, a booster water pump may be provided between the water inlet hose and the flushing pipeline, and the booster water pump is electrically connected to the PLC control system to increase the flushing water pressure. The PLC control system determines that the surface of the photovoltaic panel 1 is dirty and needs to be cleaned in time. At this time, the PLC control system of the photovoltaic panel 1 flushing system starts the booster water pump, raises the inlet tap water or domestic and fire-fighting water to above 2MPa, and flows the boosted flushing water to the flushing pipeline through the water inlet hose.

[0035] Furthermore, the booster water pump is preferably a variable frequency water pump.

[0036] In this embodiment, the PLC control system is used to control the opening or closing of the first control valve 12 and the second control valve 22 according to a preset rule.

[0037] Furthermore, both the first control valve 12 and the second control valve 22 are solenoid valves, and the solenoid valves are connected to a time relay to control the flushing time. The PLC control system is connected to the solenoid valve. The control rule of the PLC control system in this embodiment is: start the control switch of the PLC control system, first open the first control valve 12 to flush the photovoltaic panel 1, after a set time, close the first control valve 12, open the second control valve 22, reverse flush the photovoltaic panel 1, and then close the second control valve 22 after a set time to complete a flushing cycle. The PLC control system can complete one or more flushing cycles according to the degree of dirtiness of the photovoltaic panel 1 to ensure that the surface of the photovoltaic panel 1 is completely cleaned.

[0038] Furthermore, one end of the first water inlet hose 13 and the second water inlet hose 23 connected to the water source is connected to the municipal pipe network water supply pipeline or the domestic and fire-fighting water supply pipeline of the photovoltaic station.

[0039] Furthermore, the surfaces of the first flushing pipeline 11 and the second flushing pipeline 21 are covered with a heat preservation device, which includes a glass wool product and an outer galvanized thin steel plate. The heat preservation device is provided to ensure the stability of the pipeline in the external natural environment, firstly to protect the pipeline from electrochemical corrosion, and also to ensure the stability of the temperature of domestic water, so as to avoid damage to the photovoltaic panel 1 after the water temperature is too high or too low.

[0040] It should be noted that during the operation of the photovoltaic power station, dust will be deposited on the surface of the photovoltaic panel 1. When the power generation efficiency of the photovoltaic panel 1 decreases or the surface temperature of the photovoltaic panel 1 rises to a certain set value, the PLC control system determines that the surface of the photovoltaic panel 1 is dirty and needs to be cleaned in time. At this time, the PLC control system of the photovoltaic panel 1 flushing system starts the booster pump to increase the inlet tap water or domestic and fire-fighting water to more than 2MPa, and the boosted flushing water flows to the flushing pipeline through the water inlet hose.

[0041] In this embodiment, the working principle of an automatic water flushing device for photovoltaic panels of the present application is as follows: when the photovoltaic panel 1 needs to be flushed, the PLC control system starts the booster pump to increase the flushing water pressure, and at the same time opens the control valve of the flushing pipeline corresponding to the dirty area of ​​the photovoltaic panel 1, and the nozzle of the flushing pipeline in this area starts high-pressure flushing, first opens the first control valve 12 to flush the photovoltaic panel 1, after a set time, closes the first control valve 12, opens the second control valve 22, and reversely flushes the photovoltaic panel 1, and then closes the second control valve 22 after a set time to complete a flushing cycle. The PLC control system can complete one or more flushing cycles according to the degree of dirtiness of the photovoltaic panel 1 to ensure that the surface of the photovoltaic panel 1 is completely cleaned.

[0042] In summary, the technical solution of this application has the following beneficial effects:

[0043] 1. The utility model has a simple system, simple device and low cost. The flushing part of the utility model adopts a mechanical structure, thereby avoiding complex circuit control and motor drive and reducing the occurrence rate of failure.

[0044] 2. The layout of the flushing pipeline can be adjusted according to the different layouts of the photovoltaic panels. At the same time, an adjustable angle nozzle is used. By setting the flushing components at the upper and lower edges of the photovoltaic panels, it not only avoids the shading effect of the automatic flushing system on the photovoltaic panels, but also ensures that the entire photovoltaic panel is flushed.

[0045] 3. In the utility model, two flushing pipelines are independently controlled, and the flushing sequence of different flushing pipelines is controlled by opening the first control valve and the second control valve in sequence to ensure the flushing effect.

[0046] The above are merely exemplary embodiments of the present application and are not intended to limit the protection scope of the present application. The protection scope of the present application is determined by the appended claims.

Claims

1. A photovoltaic panel automatic water flushing device, characterized in that: include: Photovoltaic panels, mounted on brackets; The flushing device comprises a first flushing component and a second flushing component which are symmetrically arranged at the upper edge and the lower edge of the photovoltaic panel according to the installation angle of the photovoltaic panel. The first flushing assembly comprises a first flushing pipeline arranged along the upper edge of the photovoltaic panel, a plurality of water spraying ports are evenly arranged on the first flushing pipeline, and an adjustable angle nozzle is arranged in the water spraying port toward the photovoltaic panel, and a first water inlet hose is connected to an interface at one end of the first flushing pipeline, and a first control valve is arranged on the water inlet hose; The second flushing assembly comprises a second flushing pipeline arranged along the lower edge of the photovoltaic panel, a plurality of water spraying ports are evenly arranged on the second flushing pipeline, the adjustable angle nozzle is arranged in the water spraying port and faces the photovoltaic panel, a second water inlet hose is connected to an interface at one end of the second flushing pipeline, and a second control valve is arranged on the second water inlet hose; The PLC control system is used to control the opening or closing of the first control valve and the second control valve according to a preset rule.

2. The photovoltaic panel automatic water flushing device according to claim 1, characterized in that: A booster water pump is also provided between the water inlet hose and the flushing pipeline.

3. The photovoltaic panel automatic water flushing device according to claim 2, characterized in that: The booster water pump is a variable frequency water pump.

4. The photovoltaic panel automatic water flushing device according to claim 1, characterized in that: The first control valve and the second control valve are both solenoid valves, and the solenoid valves are connected to time relays.

5. The photovoltaic panel automatic water flushing device according to claim 4, characterized in that: The PLC control system is connected to the solenoid valve.

6. The photovoltaic panel automatic water flushing device according to claim 1, characterized in that: The water spray ports are arranged along the circumference of the flushing pipeline.

7. The photovoltaic panel automatic water flushing device according to claim 1, characterized in that: One end of the first water inlet hose and the second water inlet hose is connected to the municipal pipe network water supply pipeline or the photovoltaic station's domestic and fire-fighting water supply pipeline.

8. The photovoltaic panel automatic water flushing device according to claim 1, characterized in that: The left edge and the right edge of the photovoltaic panel are respectively provided with a third flushing pipeline and a fourth flushing pipeline.

9. The photovoltaic panel automatic water flushing device according to claim 1, characterized in that: The surfaces of the first flushing pipeline and the second flushing pipeline are covered with a heat-insulating device, which includes a glass wool product and an external galvanized thin steel plate.

10. The photovoltaic panel automatic water flushing device according to claim 1, characterized in that: The bracket includes a front support plate, a rear support plate and a bottom connecting rod, the front support plate and the rear support plate are arranged perpendicular to the bottom surface, and the rear support plate is higher than the front support plate; the top ends of the front support plate and the rear support plate are provided with bearing grooves, the bottom surface of the photovoltaic panel is provided with a protrusion arranged in the bearing groove, and the photovoltaic panel is mounted on the front support plate and the rear support plate.

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