Photovoltaic power generation device and method of using the same

Abstract

The application discloses a photovoltaic power generation device and a use method thereof, relates to the technical field of solar photovoltaic power generation, and comprises a frame, photovoltaic glass, cell pieces and a back plate which are installed in the frame, and further comprises a water tank which is arranged below the frame; a filter chamber is communicated with the top plate of the water tank; the upper end of the filter chamber is communicated with a tray which is arranged on one side of the back plate; the filter chamber is in a cylindrical shape and is surrounded by a first wall surface; a circular table-shaped outlet is arranged on the top plate of the water tank inside the first wall surface; and a filter core is arranged in the filter chamber. The application improves the collection of condensation from the surface of the back plate from the collection of condensation from the surface of the photovoltaic glass in the prior art, improves the collection efficiency of condensation by arranging a water guide groove and a tray on the surface of the back plate; by controlling the water flow direction, the water flow in the water falling pipeline of the tray can be upwardly back-flushed; and by arranging the filter chamber and the filter core, the problems of the blockage of the collection pipeline and the loss of condensation outside the collection device are solved.

Description

Technical Field

[0001] This invention relates to the field of solar photovoltaic power generation technology, specifically to a photovoltaic power generation device and its usage method. Background Technology

[0002] On nights with high humidity and large temperature differences between day and night, a large amount of dew will condense on the surface of photovoltaic glass. Existing technologies have been developed to collect and utilize the condensation on the surface of photovoltaic glass, but the collection effect is not good. The reason is that in recent years, in order to improve the transmittance of sunlight, a layer of anti-reflection film is usually coated on the surface of photovoltaic glass. The surface of the anti-reflection film has a rough structure, and the dust that falls on the back of the photovoltaic panel easily combines with the condensation, causing the condensation to stagnate on the surface of the anti-reflection film and making it difficult to flow down, resulting in low collection efficiency. In addition, the combination can also block the collection pipes, causing the condensation to leak out of the collection device. Summary of the Invention

[0003] The purpose of this invention is to provide a photovoltaic power generation device and its usage method, which can improve the collection efficiency of condensation and avoid pipeline blockage and condensation loss.

[0004] The objective of this invention can be achieved through the following technical solutions:

[0005] A photovoltaic power generation device includes a frame and photovoltaic glass, solar cells, and a backsheet installed within the frame, and further includes:

[0006] The water tank is located below the frame;

[0007] A filter chamber is connected to the top plate of the water tank. The upper end of the filter chamber is connected to a tray set on one side of the back plate. The filter chamber is cylindrical and is surrounded by a first wall. A frustum-shaped outlet is provided on the top plate of the water tank inside the first wall. A filter element is provided inside the filter chamber.

[0008] The filter element is cylindrical and formed by a second wall, which is parallel to the first wall. The cross-section of the filter element is W-shaped, and the conical part in the middle of the filter element is a filter screen. An annular bottom surface is connected between the lower edge of the filter screen and the lower edge of the second wall. Both the second wall and the bottom surface are made of waterproof material. The apex of the conical filter screen corresponds to the lower end of the first pipe. The lower end of the filter screen is fitted onto the outlet, and the bottom surface contacts the top plate of the water tank. The bottom surface is located between the outlet and the first wall. The height of the first wall, the height of the second wall, and the height of the conical filter screen decrease successively.

[0009] As a further embodiment of the present invention: the filter chamber is provided with a top cover, a first pipe is connected to the top cover, a first valve is provided on the first pipe, a second pipe and a third pipe are also connected to the top plate of the water tank, a fourth pipe is connected to the pipe between the upper port of the first pipe and the first valve, a second valve and a third valve are provided on the fourth pipe, the upper port of the second pipe is connected to the pipe between the second valve and the third valve, and the lower port of the second pipe is connected to the submersible pump at the bottom of the water tank.

[0010] As a further aspect of the present invention: a first level gauge is provided on the filter chamber, the first level gauge is inserted into the filter chamber from the top cover, the first level gauge is a contact level gauge, and the position of its lower end sensing head is lower than the height of the apex of the filter screen cone.

[0011] As a further aspect of the present invention: a fifth channel is connected to the upper cover of the filter chamber, the lower end of the fifth channel being close to the bottom surface of the filter element, and the upper end being connected to the mud pump outside the filter chamber.

[0012] As a further aspect of the present invention, it also includes a water guide channel, which is disposed on the side of the back panel away from the photovoltaic glass and is used to guide water to the lower end of the frame.

[0013] As a further aspect of the present invention: the tray is located on the side of the lower end of the frame near the back plate, and is used to collect water flowing down from the water guide channel; a through hole is provided on the bottom surface of the tray, and the through hole is connected downward to a drain pipe, the lower end of the drain pipe being connected to the upper end of the first pipe through a retractable hose.

[0014] As a further aspect of the present invention: the angle between the bottom surface of the tray and the back plate surface is 120° to 150°.

[0015] As a further aspect of the present invention, a second level gauge is provided inside the water tank. The second level gauge is a non-contact level gauge that can continuously measure the water level in the water tank.

[0016] As a further aspect of the present invention, it also includes a PLC controller, which is electrically connected to the first / second level gauge, the first / second / third valve, the submersible pump, the mud pump, and the motor that drives the frame to rotate, for operating the photovoltaic power generation device, which can make the water in the downpipe flow upward and can make the frame rotate so that the back plate tilts towards the sky.

[0017] As a further aspect of the present invention: a method of using a photovoltaic power generation device, comprising the following steps:

[0018] S1, power generation: During the sunrise to sunset period, the PLC controller manipulates the frame to rotate, so that the photovoltaic glass faces the sky and tracks the sun;

[0019] S2. Change the frame orientation. After sunset, the PLC controller manipulates the frame to rotate, so that the tilt direction of the frame changes from the photovoltaic glass facing the sky to the back panel facing the sky. When the bottom of the tray reaches the horizontal position, the rotation stops and is fixed.

[0020] S3. Collect condensation. The first valve is opened and the second valve is closed. The dew condenses on the surface of the back plate and is guided into the tray by the water guide channel. It then enters the filter chamber through the through hole, the drain pipe, the retractable hose, the first pipe, and the first valve.

[0021] S4. Water flows out from the lower end of the first pipe through the filter chamber and falls to the top of the cone-shaped filter screen. Water enters the water tank 7 through the filter screen and the outlet. Dust and other impurities that cannot pass through the filter screen slide down the cone surface and accumulate on the bottom plane.

[0022] S5. Change the frame orientation again. Before sunrise, the PLC controller manipulates the frame to rotate, so that the photovoltaic glass returns to the direction of the sky.

[0023] S6. Power generation, repeating from step S1.

[0024] During the cycle of the above steps, one or more of the following steps may be inserted depending on the operating status of the device:

[0025] S7, Utilization

[0026] Using the collected condensation, the second valve is closed and the third valve is opened, and the submersible pump works to send the water in the tank to the cleaning device to clean the surface of the photovoltaic glass.

[0027] S8, Anti-clogging and anti-leakage

[0028] In step S3, the second level gauge is in continuous working state. When condensation causes dust or other substances to block the tray through hole, the second level gauge can detect in time that if the water level in the tank does not rise within a certain period of the condensation time, the PLC controller will assume that the tray through hole is blocked according to the predetermined program. At this time, the PLC controller will operate the first valve to close, the second valve to open, and the third valve to close, and start the submersible pump to allow the water in the drain pipe to flow upward, pushing the water in the tank out from the upper port of the drain pipe, backflushing the blockage in the through hole, clearing the blockage in the tray through hole in time, and preventing water from overflowing from the tray.

[0029] In step S4, when the accumulated material rises to the point where the water level inside the filter element contacts the lower end of the sensing head of the first level gauge, the PLC controller starts the mud pump to extract the accumulated material, promptly clear the filter element blockage, and prevent water from overflowing from the filtration chamber due to the filter element blockage.

[0030] S9, Hydrating

[0031] When the second level gauge detects that the water tank is low on water, water can be added to the tank from other water sources through the third pipe until the water level reaches the specified level.

[0032] The beneficial effects of this invention are:

[0033] This invention improves upon existing technology by collecting condensation from the surface of photovoltaic glass to the surface of the backsheet. By incorporating water channels and trays on the backsheet surface, the efficiency of condensation collection is enhanced. Furthermore, by controlling the water flow direction to allow water in the tray's drain pipe to backflush upwards, and by installing a filter chamber and filter element, not only are the problems of collection pipe blockages solved, but also the issue of condensation loss outside the collection device are prevented. This invention recycles natural water resources and offers advantages such as simple structure, convenient maintenance, and low cost. Attached Figure Description

[0034] The invention will now be further described with reference to the accompanying drawings.

[0035] Figure 1 This is a schematic diagram of the structure of a photovoltaic power generation device according to the present invention;

[0036] Figure 2 yes Figure 1 A magnified view of a portion of point I;

[0037] Figure 3 yes Figure 1 AA view;

[0038] Figure 4 yes Figure 3 BB view;

[0039] Figure 5 This is a schematic diagram of a photovoltaic power generation device of the present invention in the condensation collection state. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] This invention relates to a photovoltaic power generation device, such as... Figure 1 As shown, the system includes a frame 1, photovoltaic glass 2, solar cells 3, and a backsheet 4 installed within the frame 1, and also includes:

[0042] Water guide channel 5:

[0043] The water channel 5 is set on the side of the back plate 4 away from the photovoltaic glass 2, and is used to guide water to the lower end of the frame 1;

[0044] Tray 6:

[0045] The tray 6 is located on the side of the lower end of the frame 1 near the back plate 4, and is used to collect water flowing down from the water guide trough 5; a through hole 60 is provided on the bottom surface of the tray 6, and the through hole 60 is connected to the drain pipe 61 downward.

[0046] Water tank 7:

[0047] Water tank 7 is located below frame 1. A filter chamber 8 is connected to the top plate 78 of water tank 7. The filter chamber 8 is provided with a top cover 80. A first pipe 71 is connected to the top cover 80. A first valve 70 is provided on the first pipe 71. A second pipe 72 and a third pipe 73 are also connected to the top plate 78 of water tank 7. A fourth pipe 74 is connected to the pipe between the upper port of the first pipe 71 and the first valve 70. A second valve 75 and a third valve 76 are provided on the fourth pipe 74. The upper port of the second pipe 72 is connected to the pipe between the second valve 75 and the third valve 76. The lower port of the second pipe 72 is connected to the submersible pump 77 at the bottom of the water tank. The upper port of the first pipe 71 is connected to the lower port of the drain pipe 61 through a retractable hose 62 (shown by the dotted line in the figure).

[0048] Filter chamber 8:

[0049] like Figure 2 As shown, the filter chamber 8 is cylindrical and is surrounded by a first wall 81. A frustum-shaped outlet 82 is provided on the top plate 78 of the water tank inside the first wall 81. A filter element 9 is provided inside the filter chamber 8.

[0050] Filter element 9:

[0051] like Figure 2 As shown, the filter element 9 is cylindrical, surrounded by a second wall 91, which is parallel to the first wall 81. The cross-section of the filter element 9 is W-shaped. The conical part in the middle of the filter element 9 is a filter screen 92. An annular bottom surface 93 is connected between the lower edge of the filter screen 92 and the lower edge of the second wall 91. Both the second wall 91 and the bottom surface 93 are made of impermeable material. The apex of the conical filter screen 92 corresponds to the lower port of the first pipe 71. The lower port of the filter screen 92 is fitted onto the outlet 82, and the bottom surface 93 contacts the top plate 78 of the water tank. The bottom surface 93 is located between the outlet 82 and the first wall 81. The height of the first wall 81, the height of the second wall 91, and the height of the conical filter screen 92 decrease successively.

[0052] First liquid level gauge 83:

[0053] like Figure 2As shown, the first level gauge 83 is inserted into the filter chamber 8 from the top cover 80. The first level gauge 83 is a contact level gauge, and the position of its lower end sensing head is lower than the height of the cone apex of the conical filter screen 92. The first level gauge can be a float type or a tuning fork type, which can be obtained from the prior art.

[0054] Fifth Pipeline 84:

[0055] like Figure 2 As shown, a fifth pipe 84 is also connected to the upper cover 80 of the filter chamber 8. The lower port of the fifth pipe 84 is close to the bottom surface 93 of the filter element 9, and the upper port is connected to the mud pump (not shown in the figure) outside the filter chamber. The mud pump can be obtained from the prior art.

[0056] PLC controller:

[0057] The PLC controller (not shown in the figure) is electrically connected to the first / second level gauge, the first / second / third valve, the submersible pump, the mud pump, and the motor that drives the frame 1 to rotate. It is used to operate the device, including enabling the water in the downpipe 61 to flow upward and enabling the frame 1 to rotate so that the back plate tilts towards the sky. The method of rotating the frame 1 includes providing a support for the frame 1, which is driven by a motor to rotate the frame to change the orientation of the frame. The support, the motor, and the control technology can all be obtained from the prior art.

[0058] like Figure 3 , Figure 4 As shown, in this embodiment, there are two sets of water guide channels 5. The water guide channels 5 are fishbone shaped, including a vertical main channel 51 and several inclined branch channels 52. The branch channels 52 are symmetrically distributed about the main channel 51. The branch channels of adjacent water guide channels are staggered in the vertical direction, and the cross-sections of the main channel and the branch channels are both small semicircles. The main channel 51 has a larger radius than the branch channels 52. The material of the back plate is glass. The surfaces of the main channel and the branch channels formed on the glass surface are coated with a hydrophobic coating. The hydrophobic coating is a prior art, and the coating material is usually a fluorosilane compound.

[0059] like Figure 5 As shown, the angle α between the bottom surface of the tray 6 and the surface of the back plate 4 is 120° to 150°.

[0060] like Figure 1 As shown, a second level gauge 79 is also installed inside the water tank 7. The second level gauge 79 is a non-contact level gauge that can continuously measure the water level in the water tank 7. The second level gauge can be a radar level gauge or an ultrasonic level gauge, which are all existing technologies.

[0061] A method of using a photovoltaic power generation device includes the following steps:

[0062] S1. Power generation. During the sunrise to sunset period, the PLC controller manipulates the frame 1 to rotate, so that the photovoltaic glass 2 faces the sky and tracks the sun;

[0063] S2. Change the frame orientation. After sunset, the PLC controller manipulates the frame 1 to rotate, changing the tilt direction of the frame from the photovoltaic glass facing the sky to the back panel facing the sky. When the bottom surface of the tray 6 reaches the horizontal position, the rotation stops and is fixed.

[0064] At the end of this step, as Figure 5 As shown, the bottom surface of tray 6 is horizontal and the angle between it and the back plate 4 is 120° to 150°. This balances the downward flow speed of condensation and allows the tray to be in its maximum volume state, which is conducive to the full collection of water in the tray and effectively avoids the condensation from overflowing from the tray too quickly and causing loss, or from flowing too slowly and affecting the collection efficiency.

[0065] S3. Collect condensation. The first valve 70 is opened and the second valve 75 is closed. The dew condenses on the surface of the back plate 4 and is guided into the tray 6 by the water guide trough 5. It then enters the filter chamber 8 through the through hole 60, the drain pipe 61, the retractable hose 62, the first pipe 71, and the first valve 70.

[0066] In this step, the back plate 4, made of glass, has high hydrophilicity, and dew easily condenses on its surface. Then, under the action of gravity, it first flows to the support trough 52 and then collects into the main trough 51. A hydrophobic coating is applied to the surfaces of the main trough 51 and the support trough 52, which allows the condensate to flow from the support trough into the main trough without delay and quickly flow to the tray. Of course, in this step, rainwater that falls on the surface of the back plate at night can also be collected into the water tank.

[0067] S4. Through the filter chamber 8. Water flows out from the lower end of the first pipe 71 and falls to the top of the cone of the conical filter screen 92. Water enters the water tank 7 through the filter screen 92 and the outlet 82. Dust and other impurities that cannot pass through the filter screen 92 slide down the conical surface and accumulate on the bottom plane 93.

[0068] In this step, a W-shaped filter element 9 is fitted inside a cylindrical filter chamber 8. The second wall 91 is parallel to the first wall 81. The conical part in the middle of the filter element 9 is a filter screen 92. The second wall 91 and the bottom surface 93 are both made of waterproof material. The lower end of the filter screen 92 is fitted onto the outlet 82. The bottom surface 93 contacts the top plate 78 of the water tank. The bottom surface 93 is located between the outlet 82 and the first wall 81. The height of the first wall 81, the height of the second wall 91, and the height of the conical filter screen 92 are successively reduced, etc., so that water can pass smoothly through the filter chamber, while solids are retained inside the filter element cylinder.

[0069] S5. Change the frame orientation again. Before sunrise, the PLC controller manipulates frame 1 to rotate, so that the photovoltaic glass faces the sky again;

[0070] S6. Power generation. This cycle repeats from step S1.

[0071] During the cycle of the above steps, one or more of the following steps may be inserted depending on the operating status of the device:

[0072] S7. Utilize.

[0073] Using the collected condensation, the second valve 75 is closed, the third valve 76 is opened, and the submersible pump 77 operates to send water from the water tank to the cleaning device to clean the surface of the photovoltaic glass. The cleaning device can be obtained from existing technology.

[0074] S8, Anti-clogging and anti-leakage

[0075] In step S3, the second level gauge 79 is in continuous operation. When condensation or dust blocks the tray through-hole 60, the second level gauge 79 can promptly detect that if the water level in the water tank 7 does not rise within a certain time period (e.g., within 6 hours) of the condensation period, the PLC controller will, according to a predetermined program, consider the tray through-hole 60 to be blocked. At this time, the PLC controller manipulates the water flow in the drain pipe 61 to flow upward. Specifically, the first valve 70 is closed, the second valve 75 is opened, the third valve 76 is closed, and the submersible pump 77 operates, pushing the water in the water tank out from the upper port of the drain pipe 61 to backflush the blockage in the through-hole 60. The pressure of the submersible pump is sufficient to blow the blockage out of the tray, restoring the unobstructed flow of the through-hole. Preferably, this step is more effective when the photovoltaic panel glass faces the sky. This step can promptly clear the blockage in the tray through-hole, preventing water from overflowing from the tray 6 due to the blockage.

[0076] In step S4, when the accumulated material rises to the point where the water level in the filter element 9 contacts the lower end sensing head of the first level gauge 83, the PLC controller starts the mud pump to extract the accumulated material. Since the position of the lower end sensing head of the first level gauge 83 is lower than the height of the cone apex of the conical filter screen 92, the water in the filter element 9 can still flow into the water tank through the filter screen 92. This step can promptly clear the filter element blockage and prevent water from overflowing from the filter chamber 8 due to the filter element blockage.

[0077] S9, Hydration.

[0078] When the second level gauge 79 detects that the water in the water tank 7 is insufficient, water can be added to the water tank from other water sources through the third pipe 73 until the water level reaches the specified level. Other water sources include groundwater, river and lake water, tap water, etc.

[0079] Furthermore, according to the technical concept of the present invention, a tray and a drain pipe symmetrical to the tray 6 and the drain pipe 61 can also be set on the side of the lower end of the frame 1 near the photovoltaic glass panel 2. In this way, the water used to clean the photovoltaic glass panel and the rainwater that falls on the surface of the photovoltaic glass during the day can also be collected into the water tank, so that the present invention can make maximum use of the collected condensation, rainwater and cleaning water.

[0080] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A photovoltaic power generation device comprising a frame (1) and a photovoltaic glass (2), a cell sheet (3) and a back sheet (4) installed in the frame (1), characterized in that, Also include: Water tank (7) is arranged below the frame (1); The top plate (78) of the water tank (7) is communicated with the filter chamber (8), the upper end of the filter chamber (8) is communicated with the tray (6) arranged on one side of the back plate (4), the filter chamber (8) is cylindrical and is surrounded by a first wall surface (81), a circular table type outlet (82) is arranged on the water tank top plate (78) inside the first wall surface (81), and a filter core (9) is arranged inside the filter chamber (8); The filter core (9) is cylindrical and is surrounded by a second wall surface (91), the second wall surface (91) is parallel to the first wall surface (81), the cross section of the filter core (9) is W-shaped, the conical part in the middle of the filter core (9) is a filter screen (92), an annular bottom surface (93) is connected between the lower edge of the filter screen (92) and the lower edge of the second wall surface (91), the second wall surface (91) and the bottom surface (93) are made of water-proof material, the vertex of the filter screen (92) corresponds to the position below the lower end of the first pipeline (71), the lower end of the filter screen (92) is sleeved on the outlet (82), the bottom surface (93) is in contact with the water tank top plate (78), and the bottom surface (93) is located between the outlet (82) and the first wall surface (81); The height of the first wall surface (81), the height of the second wall surface (91) and the height of the conical filter screen (92) decrease successively.

2. A photovoltaic power generation device according to claim 1, characterized by The filter chamber (8) is provided with an upper cover (80), the upper cover (80) is communicated with the first pipeline (71), the first valve (70) is arranged on the first pipeline (71), the second pipeline (72) and the third pipeline (73) are further communicated with the top plate (78) of the water tank (7), the fourth pipeline (74) is communicated with the pipeline between the upper end of the first pipeline (71) and the first valve (70), the second valve (75) and the third valve (76) are arranged on the fourth pipeline (74), the upper end of the second pipeline (72) is communicated with the pipeline between the second valve (75) and the third valve (76), and the lower end of the second pipeline (72) is communicated with the submersible pump (77) at the bottom of the water tank.

3. A photovoltaic power generation device according to claim 1, characterized by The filter chamber (8) is provided with a first liquid level meter (83), the first liquid level meter (83) is inserted into the filter chamber (8) from the upper cover (80), and the first liquid level meter (83) is a contact type liquid level meter, and the position of the lower end sensing head is lower than the height of the conical vertex of the filter screen (92).

4. The photovoltaic power device of claim 1, wherein, The upper cover (80) of the filter chamber (8) is further communicated with the fifth pipeline (84), the lower end of the fifth pipeline (84) is close to the bottom surface (93) of the filter core (9), and the upper end is communicated with the slurry pump outside the filter chamber.

5. The photovoltaic power device of claim 1, wherein, Further include a water guide groove (5), the water guide groove (5) is arranged on the side of the back plate (4) away from the photovoltaic glass (2), and is used for guiding water to the lower end of the frame (1).

6. The photovoltaic power device of claim 1, wherein, The tray (6) is arranged at the lower end of the frame (1) near one side of the back plate (4) for collecting water flowing from the water guide groove (5); a through hole (60) is arranged on the bottom surface of the tray (6), and the through hole (60) is connected with a downpipe (61) downwardly; the lower end of the downpipe (61) is connected with the upper end of the first pipe (71) through a flexible hose (62).

7. The photovoltaic power device of claim 1, wherein, The angle between the bottom surface of the tray (6) and the surface of the back plate (4) is 120°-150°.

8. The photovoltaic power device of claim 1, wherein, A second liquid level meter (79) is further arranged in the water tank (7), and the second liquid level meter (79) is a non-contact liquid level meter and can continuously measure the liquid level of water stored in the water tank (7).

9. The photovoltaic power device of claim 1, wherein, The PLC controller is in signal communication with the first / second liquid level meter, the first / second / third valve, the submersible pump, the mud pump and the motor driving the rotation of the frame (1), and is used for operating the photovoltaic power generation device, so that the water flow in the downpipe (61) can flow upward, and the frame (1) can be rotated to make the back plate (4) tilt toward the sky.

10. A method of using a photovoltaic power generation device, characterized by, The photovoltaic power generation device of any one of claims 1-9 comprises the following steps: S1, power generation, during sunrise to sunset, the PLC controller operates the frame (1) to rotate, so that the photovoltaic glass (2) faces the sky and tracks the sun; S2, change the direction of the frame, after sunset, the PLC controller operates the frame (1) to rotate, so that the tilt direction of the frame (1) changes from the photovoltaic glass facing the sky to the back plate (4) facing the sky, and when the bottom surface of the tray (6) reaches a horizontal state position, the rotation is stopped and fixed; S3, collect dew, the first valve (70) is opened, the second valve (75) is closed, and the dew condensed on the surface of the back plate (4) is guided into the tray (6) by the water guide groove (5), and then enters the filter chamber (8) through the through hole (60), the downpipe (61), the flexible hose (62), the first pipe (71) and the first valve (70); S4, pass through the filter chamber (8), the water flows out from the lower end of the first pipe (71), falls on the conical top end of the filter screen (92), and the water passes through the filter screen (92) and the outlet (82) to enter the water tank (7), and the dust and impurities that cannot pass through the filter screen (92) slide down along the conical surface and accumulate on the bottom plane (93); S5, change the direction of the frame (1) again, before sunrise, the PLC controller operates the frame (1) to rotate, so that the photovoltaic glass (2) faces the sky again; S6, power generation, cycle from step S1 In the cycle process of the above steps, any one or several of the following steps can be inserted according to the operation state of the device: S7, use Use the collected dew, the second valve (75) is closed, the third valve (76) is opened, and the submersible pump (77) works to send the water in the water tank to the cleaning device to clean the surface of the photovoltaic glass (2); S8, prevent blockage and loss In step S3, the second liquid level meter (79) is in continuous operation. When the accumulated dust in the condensation clogs the tray through-hole (60), the second liquid level meter (79) can detect in time that the water level in the water tank does not rise within a certain period of time during the condensation period. The PLC controller will consider that the through-hole (60) of the tray is clogged according to the established program. At this time, the PLC controller controls the first valve (70) to close, the second valve (75) to open, and the third valve (76) to close. The submersible pump (77) is started to make the water flow in the downpipe (61) flow upward, and the water in the water tank is pushed out from the upper port of the downpipe (61) to flush the clogging in the through-hole (60) in time, avoiding the loss of water overflow from the tray (6); In step S4, when the accumulated material rises to the water level in the filter core (9) and contacts the lower end of the first liquid level meter (83), the PLC controller starts the mud pump to pump out the accumulated material, and timely removes the clogging of the filter core, avoiding the loss of water overflow from the filter chamber (8) due to clogging of the filter core; S9, water replenishment When the second liquid level meter (79) detects that the water tank (7) is insufficient, the water tank (7) can be replenished from other water sources through the third pipeline (73) until the water level reaches the specified level.

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