A high-efficiency heat-dissipation photovoltaic power generation device and method

Abstract

The application provides a high-efficiency heat-dissipation photovoltaic power generation device and method, relates to the technical field of photovoltaic equipment, and comprises a frame body, a photovoltaic panel, a water storage tank and a cleaning assembly. The cleaning assembly comprises a driving motor, a driving screw rod, a guide rod and a cleaning plate. The bottom of the cleaning plate is provided with a flexible scrubbing block. The frame body is provided with a water pump. The cleaning assembly of the device can drive the cleaning plate to reciprocate on the surface of the photovoltaic panel through the driving motor, so as to scrub the surface of the photovoltaic panel. In addition, during the scrubbing process of the flexible scrubbing block, the air pump can pump out the air in the frame body and output the air into the air guide cavity in the cleaning plate, and then blow out the air through the air blowing hole. The air blowing can accelerate the air flow at the bottom of the photovoltaic panel, improve the air cooling effect, blow away the impurities on the floating layer of the photovoltaic panel in advance, accelerate the evaporation of the residual moisture on the photovoltaic panel due to scrubbing, and utilize the heat absorption of the moisture evaporation to reduce the surface temperature of the photovoltaic panel.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic equipment technology, specifically to a high-efficiency heat dissipation photovoltaic power generation device and method. Background Technology

[0002] With the rapid development and large-scale application of photovoltaic (PV) power generation technology, the power generation efficiency and lifespan of PV panels have become critical issues. During operation, PV panels continuously accumulate dust, bird droppings, leaves, and other impurities on their surface. These impurities not only block sunlight, reducing photoelectric conversion efficiency, but also form hot spots, accelerating cell aging and even causing damage. Furthermore, during operation, especially in summer or under intense sunlight, the temperature of the PV cells rises significantly. Since the conversion efficiency of PV cells is inversely proportional to temperature, excessively high temperatures will directly lead to a substantial decrease in power generation efficiency.

[0003] Patent application number CN202410873705.8 discloses a photovoltaic module cleaning device, the structure of which includes a photovoltaic module, a rack, a cleaning mechanism, a water tank, a drying mechanism, and a rinsing mechanism. The invention uses a motor to drive the transmission shaft and the cleaning cotton tube to rotate together. When the cleaning cotton tube rotates, it can clean the dust and impurities on the photovoltaic module. At the same time, as the motor rotates, it drives the two drive wheels on the output shaft and the first belt and the second belt to rotate. The first belt and the second belt drive two sets of drive gears to mesh with the rack gear, driving the cleaning mechanism to move. It can perform comprehensive reciprocating cleaning of dust and impurities on the photovoltaic module, increasing the utilization efficiency of the photovoltaic module.

[0004] Currently, photovoltaic (PV) installations on the market primarily address the aforementioned issues using two independent methods. The first is PV panel cleaning technology, commonly including manual cleaning or mechanical brushing. While these methods can remove surface dirt, they are often limited in function, and the cleaning water is typically discharged directly, resulting in water waste. Furthermore, mechanical brushing often leaves residue on the brush blocks, reducing subsequent cleaning effectiveness. The second is PV panel cooling technology, such as back-side water cooling or air cooling. Its main purpose is to lower the PV panel temperature through forced convection, but it usually doesn't address surface cleaning, has a complex structure, and consumes significant energy. Existing technologies attempt to combine cleaning and cooling, but these often suffer from the following shortcomings: a lack of effective water treatment mechanisms for floating impurities, leading to water quality degradation after long-term operation, affecting both cooling and cleaning effects; and a limited cooling method with limited efficiency in high-temperature environments, making it difficult to significantly improve the power generation efficiency of PV panels under high-temperature conditions.

[0005] Therefore, there is an urgent need for a highly integrated technology that can recycle water resources and simultaneously and efficiently clean and actively dissipate heat from photovoltaic panels, in order to solve the problem of reduced power generation efficiency caused by dust accumulation and temperature rise in existing photovoltaic panels. Summary of the Invention In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a high-efficiency heat dissipation photovoltaic power generation device, including a frame, a photovoltaic panel, a water storage tank and a cleaning component. The photovoltaic panel is fixed in the frame, and the end of the photovoltaic panel is provided with a cleaning tank and a guide channel communicating with the cleaning tank. The cleaning assembly includes a drive motor, a drive screw, a guide rod, and a cleaning plate. The bottom of the cleaning plate is provided with a flexible scrubbing block. The two ends of the cleaning plate are respectively provided with threaded sleeves and guide sleeves. The guide rod is fixed to one side of the frame body, and the drive screw is rotatably disposed on the other side of the frame body. The drive screw and the guide rod pass through the threaded sleeve and the guide sleeve respectively. The end of the drive screw is connected to the output shaft of the drive motor. The water storage tank is provided with a water inlet, which is connected to the guide channel; a water pump is provided inside the frame, which is connected to the water storage tank through an input water pipe; a water-cooled guide plate is provided at the bottom of the photovoltaic panel, and a flow channel cavity is provided inside the water-cooled guide plate. A first guide pipe and a second guide pipe are respectively connected to both ends of the flow channel cavity. The first guide pipe is connected to the water pump, and the second guide pipe is connected to the end of the cleaning tank.

[0006] Furthermore, the frame body is provided with ventilation openings and air extraction boxes on both sides, the air extraction boxes are connected to the internal cavity of the frame body, the air extraction boxes are provided with air extraction pumps, and the top of the air extraction pumps is provided with exhaust ports. Temperature sensors are also installed on the frame.

[0007] Furthermore, the cleaning plate has two shaped air guide chambers located on both sides of the flexible scrubbing block. The bottom of the cleaning plate has two rows of air blowing holes, each row of air blowing holes communicating with an air guide chamber. The top of the cleaning plate has two air inlets. Both rows of air blowing holes are inclined outward. The top of the cleaning plate is also provided with an air inlet connector, and the air inlet connector is provided with a connector tube. The two connector tubes are respectively connected to the two air inlets. The air inlet connector is connected to the air pump through a flexible conduit.

[0008] Furthermore, the top of the air pump is also provided with an electromagnetic three-way valve, which is connected to the exhaust port of the air pump. The electromagnetic three-way valve has a first air outlet and a second air outlet, and the first air outlet is connected to the flexible conduit.

[0009] Furthermore, the water storage tank is provided with a water inlet and a filter cover. The water inlet is located below the water inlet. The filter cover is connected to the water storage tank and closes the water inlet. The filter cover is provided with a filter screen and is connected to the first guide pipe.

[0010] Furthermore, the water storage tank is equipped with a water level sensor, and the water storage tank has an inlet and an overflow outlet on both sides, respectively. An overflow valve and a water supply valve are fixedly installed on the inlet and the overflow outlet, respectively. The overflow valve and the water supply valve are respectively connected to a water supply pipe and an overflow pipe, and the water supply pipe is connected to the water supply pipeline. Both the overflow valve and the water supply valve are connected to the water level sensor, which is used to sense the water level in the water tank and control the opening and closing of the overflow valve and the water supply valve based on the water level data in the water tank.

[0011] The bottom of the water tank is provided with guide plates on both sides and a drain valve in the middle of the bottom of the water tank. The drain valve is provided with a drain pipe at the lower end. The drain valve is opened periodically to discharge the sewage and sediment impurities in the water tank.

[0012] Furthermore, the water storage tank is also equipped with a cleaning frame and a drive gear, and the outer wall of the cleaning frame slides against the inner wall of the water storage tank; A lifting rack is fixedly provided on the cleaning frame, and a drive gear is connected to the end of the drive screw, and the drive gear meshes with the lifting rack; The cleaning frame is provided with multiple rotating shafts and multiple permeable plates. The inner wall of the cleaning frame is provided with multiple pairs of rotating holes. Both ends of the rotating shafts are rotatably disposed in the rotating holes. The sides of the permeable plates are fixedly connected to the rotating shafts.

[0013] Furthermore, a reducer is fixedly installed on the inner wall of the water storage tank, the drive screw passes through the water storage tank and is connected to the input shaft of the reducer, and the drive gear is fixedly connected to the end of the output shaft of the reducer.

[0014] Furthermore, the bottom of the cleaning frame is provided with two support strips, which are used to support the permeable plate; The cleaning frame is also equipped with a limiting block, which is used to limit the rotation angle of the permeable plate; The permeable plate rotation includes a frame plate body and a permeable filter screen fixed inside the frame plate body.

[0015] The present invention also provides a cooling and cleaning method for a high-efficiency heat dissipation photovoltaic power generation device, the method using the aforementioned high-efficiency heat dissipation photovoltaic power generation device; the method includes the following steps: S1: The water pump continuously feeds water from the tank into the cleaning tank to wet the flexible scrubbing blocks. The rinsed water flows back into the storage tank through the guide channel. During the water pumping process, the water flows through the flow channel cavity to cool the photovoltaic panels. S2: The drive motor drives the drive screw to rotate first in the forward direction and then in the reverse direction; during this process, the cleaning plate drives the flexible scrubbing block to move back and forth on the photovoltaic panel; causing the flexible scrubbing block to scrub the surface of the photovoltaic panel back and forth. The drive screw drives the cleaning frame to move back and forth in the water tank by descending and rising through the meshing structure of the drive gear and the lifting rack; when the rotating permeable plate descends, it is completely immersed in the water, and its side away from the rotating shaft first rotates upward under the action of water surface resistance, so that the floating impurities on the water surface float to the top of the rotating permeable plate under the action of buoyancy; the rotating permeable plate rises to reset, separating the floating impurities from the water; During the rotation of the drive screw driven by the drive motor, the air pump extracts the gas from the frame and introduces it into the air guide cavity, and then sprays it out from the exhaust port, thereby blowing away the floating impurities on the photovoltaic panel in advance and drying the residual moisture from wiping on the photovoltaic panel, while reducing the surface temperature of the photovoltaic panel. S3: The water pump continuously pumps water from the tank into the cleaning tank to clean the flexible scrubbing blocks. At the same time, water flows into the flow channel cavity to cool the photovoltaic panels. S4: The temperature sensor senses the ambient temperature. If the ambient temperature exceeds a first predetermined value, the execution frequency of steps S1-S3 is increased.

[0016] The beneficial effects of the photovoltaic power generation device and method with high-efficiency heat dissipation of the present invention are as follows: (1) The high-efficiency heat dissipation photovoltaic power generation device includes a frame, a photovoltaic panel, a water storage tank and a cleaning component. The cleaning component includes a drive motor, a drive screw, a guide rod and a cleaning plate. A flexible scrubbing block is provided at the bottom of the cleaning plate. A water pump is provided in the frame. The water pump is connected to the water storage tank through an input water pipe. A water-cooled guide plate is provided at the bottom of the photovoltaic panel. A flow channel cavity is provided in the water-cooled guide plate. A first guide pipe and a second guide pipe are respectively connected to both ends of the flow channel cavity. The first guide pipe is connected to the water pump and the second guide pipe is connected to the end of the cleaning tank. The cleaning assembly of this device uses a drive motor to move the cleaning plate back and forth across the surface of the photovoltaic panel. This allows the flexible scrubbing blocks at the bottom of the cleaning plate to scrub the surface of the photovoltaic panel. Before and after the flexible scrubbing blocks scrub, a water pump draws water from the storage tank through a water-cooled guide plate into the cleaning tank. This allows the water to pre-wet the flexible scrubbing blocks before scrubbing and to clean them after scrubbing. Simultaneously, the water pumped out by the pump can cool the photovoltaic panel. In addition, during the scrubbing process, an air pump extracts air from the frame and outputs it to the air guide cavity inside the cleaning plate, blowing it out through the air blowing holes. This air blowing can accelerate the airflow at the bottom of the photovoltaic panel, improving the air cooling effect. The blown-out air can pre-blow away floating impurities on the photovoltaic panel, reducing the impurities adsorbed by the flexible scrubbing blocks. The blown-out air can also accelerate the evaporation of residual moisture on the photovoltaic panel, reducing the impact of moisture on photovoltaic power generation. At the same time, the evaporation of moisture absorbs heat, lowering the surface temperature of the photovoltaic panel.

[0017] (2) This invention integrates photovoltaic panel cleaning and heat dissipation into a compact system through ingenious structural design. The movement of the cleaning component not only completes surface wiping but also simultaneously drives water cooling circulation and air cooling, achieving simultaneous cleaning and cooling, significantly improving the power generation efficiency and service life of the photovoltaic panel. Furthermore, the compact structure reduces equipment footprint and cost. This invention also provides a multi-layered cooling mechanism: First, the circulating water in the water-cooled guide plate directly liquid-cools the back of the photovoltaic panel, removing a large amount of heat. Second, the air pump accelerates airflow at the bottom of the photovoltaic panel, thus achieving air cooling; the air pump, along with the air guide chamber and air holes on the cleaning plate, blows airflow onto the photovoltaic panel surface as the cleaning plate moves, achieving air cooling and accelerating surface moisture evaporation, further reducing the panel temperature by utilizing evaporative heat absorption. This composite cooling method, combining water cooling, air cooling, and evaporative cooling, is particularly suitable for high-temperature environments, more effectively controlling the photovoltaic panel's operating temperature and thus maximizing power generation efficiency at high temperatures.

[0018] (3) The water storage tank of this high-efficiency heat dissipation photovoltaic power generation device is equipped with a water supply valve, an overflow valve, a drain valve and a cleaning frame. The water supply valve can be opened when the water storage tank is short of water, so that the water supply pipe can supply water to the water storage tank. When it rains or is being washed, the guide channel can collect rainwater or washing water and guide it into the water storage tank for storage. After the water volume reaches the predetermined value, the overflow valve opens to discharge the excess rainwater. The drain valve opens periodically to discharge the sewage and sediment impurities in the water storage tank. In addition, the device uses the linkage of the drive screw, drive gear and lifting rack to make the reciprocating movement of the cleaning plate and the lifting movement of the cleaning frame coordinated. During the photovoltaic panel cleaning process, the cleaning frame is driven to move down and up in reciprocating motion. During the lifting process, the permeable plate in the cleaning frame can automatically "scoop up" and separate the impurities (such as leaves, dust clumps, etc.) floating on the water surface and separate them from the water surface, effectively preventing blockage in the circulating water system. This device can not only collect rainwater and improve water resource utilization, but also periodically clean the sediment and floating impurities in the water storage tank. This can ensure the long-term reliability of the entire water circulation system and reduce the maintenance frequency and operating cost of the photovoltaic device. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the overall structure of a high-efficiency heat dissipation photovoltaic power generation device according to an embodiment of the present invention.

[0020] Figure 2 A schematic diagram of the first structure of a photovoltaic panel in a high-efficiency heat dissipation photovoltaic power generation device according to an embodiment of the present invention.

[0021] Figure 3 A schematic diagram of the second structure of a photovoltaic panel in a high-efficiency heat dissipation photovoltaic power generation device according to an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the internal structure of the frame of a high-efficiency heat dissipation photovoltaic power generation device according to an embodiment of the present invention.

[0023] Figure 5 This is a schematic diagram of the internal structure of the water storage tank of a high-efficiency heat dissipation photovoltaic power generation device according to an embodiment of the present invention.

[0024] Figure 6 yes Figure 5 A partial structural diagram of the central water storage tank.

[0025] Figure 7 yes Figure 5 A schematic diagram of the cleaning frame of the medium-sized water storage tank.

[0026] Figure 8 yes Figure 7 Enlarged view of point A in the middle.

[0027] Figure 9 This is a schematic diagram of the dispersed structure of the permeable plate of a high-efficiency heat dissipation photovoltaic power generation device according to an embodiment of the present invention.

[0028] Figure 10 This is a schematic diagram of the cleaning plate and flexible scrubbing block of a high-efficiency heat dissipation photovoltaic power generation device according to an embodiment of the present invention.

[0029] Figure 11 yes Figure 10 A magnified view of section BB in the middle.

[0030] Figure 12 This is a flowchart of a cooling and heat dissipation method for a high-efficiency heat dissipation photovoltaic power generation device according to the present invention.

[0031] In the above diagram: 100-Frame body, 200-Photovoltaic panel, 201-Water-cooled guide plate, 202-Cleaning tank, 203-Guide channel, 300-Drive motor, 301-Drive screw, 302-Guide rod, 303-Reducer, 304-Drive gear, 400-Cleaning plate, 401-Threaded sleeve, 402-Guide sleeve, 403-Air blowing hole, 404-Air guiding chamber, 410-Flexible scrubbing block, 500-Water pump, 501-Input water pipe, 502-First guide pipe, 5 03-Second guide pipe, 600-Air pump, 601-Air extraction box, 610-Solenoid three-way valve, 611-Second air outlet, 612-Flexible conduit, 613-Connector pipe, 700-Water storage tank, 701-Water inlet, 702-Water supply valve, 703-Drain valve, 704-Overflow valve, 710-Filter cover, 800-Cleaning frame, 801-Lifting rack, 802-Limit block, 803-Supporting strip, 810-Rotating shaft, 811-Frame plate, 812-Permeable filter screen. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0033] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items.

[0034] Please refer to Figures 1 to 11 This invention discloses a high-efficiency heat dissipation photovoltaic power generation device, comprising a frame 100, a photovoltaic panel 200, a water storage tank 700, and a cleaning assembly. The photovoltaic panel 200 has a cleaning groove 202 at its end and a guide groove 203 communicating with the cleaning groove 202. The photovoltaic panel 200 is fixed within the frame 100. Specifically, a cleaning groove plate is fixedly provided at the end of the photovoltaic panel 200, and guide groove plates are fixedly provided on the other edges of the photovoltaic panel 200. The cleaning groove plate and the guide groove plate are respectively provided with a cleaning groove 202 and a guide groove 203. The cleaning groove plate and the guide groove plate are connected to the inner wall of the frame 100. The photovoltaic panel 200 has a cleaning groove plate and a guide groove plate on its edge, and one end of the cleaning groove 202 communicates with the guide groove 203.

[0035] The cleaning assembly includes a drive motor 300, a drive screw 301, a guide rod 302, and a cleaning plate 400. The cleaning plate 400 is a strip-shaped plate, and a flexible scrubbing block 410 is provided at the bottom of the cleaning plate 400. The flexible scrubbing block 410 is preferably made of sponge material, which has good elasticity and water absorption. The flexible scrubbing block 410 is accommodated in the cleaning tank 202. Threaded sleeves 401 and guide sleeves 402 are respectively provided at both ends of the cleaning plate 400. The guide rod 302 is fixed to one side of the frame body 100, and the drive screw 301 is rotatably mounted on the other side of the frame body 100. On one side, a drive motor 300 is fixed to the frame 100. A drive screw 301 and a guide rod 302 pass through a threaded sleeve 401 and a guide sleeve 402, respectively. The end of the drive screw 301 is connected to the output shaft of the drive motor 300. The rotation of the drive motor 300 drives the drive screw 301 to rotate, thereby driving the cleaning plate 400 to reciprocate along the guide rod 302 through the threaded sleeve 401. This causes the flexible scrubbing block 410 to reciprocate and scrub the surface of the photovoltaic panel 200. After the cleaning plate 400 has finished scrubbing, the flexible scrubbing block 410 returns to the cleaning tank 202. The above cleaning process is performed periodically.

[0036] A water storage tank 700 is fixed to the end of the frame 100. The side wall of the water storage tank 700 has an inlet 701 and a outlet, with the outlet located below the inlet 701. The inlet 701 is connected to the guide channel 203. A water pump 500 is installed inside the frame 100 and is connected to the water storage tank 700 via an input water pipe 501. A water-cooled guide plate 201 is located at the bottom of the photovoltaic panel 200. The water-cooled guide plate 201 has a flow channel cavity with a reciprocating folded flow channel structure, which increases the heat dissipation area of ​​the water-cooled guide plate 201. A first guide pipe 502 and a second guide pipe 503 are connected to both ends of the flow channel cavity. The first guide pipe 502 is connected to the water pump 500, and the second guide pipe 503 is connected to the end of the cleaning tank 202.

[0037] The cleaning component of this device can drive the cleaning plate 400 to reciprocate on the surface of the photovoltaic panel 200 via the drive motor 300. This allows the flexible scrubbing block 410 at the bottom of the cleaning plate 400 to scrub the surface of the photovoltaic panel 200. Before and after the flexible scrubbing block 410 scrubs, the water pump 500 can draw water from the water storage tank 700 into the cleaning tank 202 through the water-cooled guide plate 201. This allows the water flow to pre-wet the flexible scrubbing block 410 before scrubbing and to clean it after scrubbing. At the same time, the water flow drawn by the water pump 500 can also cool the photovoltaic panel 200. After the water flow in the cleaning tank 202 wets and cleans the flexible scrubbing block 410, it can flow back into the water storage tank 700 through the guide channel 203 and the water inlet 701, realizing the recycling of water resources.

[0038] In a preferred embodiment, the frame 100 is provided with a ventilation opening and an air extraction box 601 on both sides. The ventilation opening is provided with a dustproof net. The air extraction box 601 is connected to the cavity inside the frame 100. The air extraction box 601 is provided with an air extraction pump 600, and the top of the air extraction pump 600 is provided with an exhaust port. When the air extraction pump 600 is started, it can extract the gas inside the frame 100 and draw the outside gas into the frame 100, thereby accelerating the air flow at the bottom of the photovoltaic panel 200 and cooling the bottom of the photovoltaic panel 200 by air cooling.

[0039] The cleaning plate 400 has two shaped air guide chambers 404 located on both sides of the flexible scrubbing block 410. The bottom of the cleaning plate 400 has two rows of air holes 403, each row communicating with one air guide chamber 404. The top of the cleaning plate 400 has two air inlets; both rows of air holes 403 are inclined outwards. The top of the cleaning plate 400 also has an air inlet connector, which has connector pipes 613 connected to the two air inlets. The air inlet connector is connected to the vacuum pump 600 via a flexible conduit 612. The top of the vacuum pump 600 also has an electromagnetic three-way valve 610 connected to the exhaust port of the vacuum pump 600. The electromagnetic three-way valve 610 has a first air outlet and a second air outlet 611. The first air outlet is connected to the flexible conduit 612, and the second air outlet 611 is a venting port. When the cleaning process of the cleaning components is not in progress and air cooling of the photovoltaic panel 200 is required, the electromagnetic three-way valve 610 switches to the second air outlet 611, and the gas blown by the air pump 600 is discharged through the second air outlet 611. When the cleaning process of the cleaning components is in progress, the electromagnetic three-way valve 610 switches to the first air outlet, and the air pump 600 blows air into the guide air chamber 404. At this time, the airflow is blown out from the two rows of air holes 403. When the air pump 600 blows air through the air holes 403, the blown air can pre-blow away the floating impurities (such as dust, leaves, gravel and other light impurities) on the photovoltaic panel 200 before wiping, reducing the burden of subsequent wiping and the risk of hard particles scratching the panel surface, improving the cleaning effect and safety. In addition, the blown air can also accelerate the evaporation of residual moisture on the photovoltaic panel 200 due to wiping, reducing the impact of moisture on photovoltaic power generation. At the same time, the evaporation of moisture absorbs heat to reduce the surface temperature of the photovoltaic panel 200.

[0040] This invention, through ingenious structural design, integrates the cleaning and heat dissipation of the photovoltaic panel 200 into a compact system. The movement of the cleaning components not only completes surface wiping but also simultaneously drives water cooling circulation and air cooling, achieving simultaneous cleaning and cooling. This significantly improves the power generation efficiency and lifespan of the photovoltaic panel 200, while its compact structure reduces equipment footprint and cost. Furthermore, this invention provides a multi-layered cooling mechanism. First, the circulating water within the water-cooled guide plate 201 directly liquid-cools the back of the photovoltaic panel 200, removing a significant amount of heat. Second, the air pump 600 accelerates airflow at the bottom of the photovoltaic panel 200, thus achieving air cooling. The air pump 600, along with the air guide cavity 404 and air blowing holes 403 on the cleaning plate 400, blows airflow onto the surface of the photovoltaic panel 200 as the cleaning plate 400 moves, achieving air cooling and accelerating surface moisture evaporation. The heat absorption from evaporation further reduces the panel surface temperature. This composite cooling method, which combines water cooling, air cooling, and evaporative cooling, is particularly suitable for high-temperature environments. It can more effectively control the operating temperature of the photovoltaic panel 200, thereby greatly improving the power generation efficiency at high temperatures.

[0041] In a preferred embodiment, the water inlet of the water storage tank 700 and the filter cover 710 are detachably connected to the water storage tank 700 and close the water inlet. The filter cover 710 is provided with a filter screen and is connected to the first guide pipe 502. The filter screen can filter the water entering the first guide pipe 502. The detachability of the filter cover 710 makes it easy to replace the filter screen.

[0042] The water storage tank 700 is equipped with a water level sensor. An inlet 701 and an overflow outlet are located on both sides of the water storage tank 700. An overflow valve 704 and a water supply valve 702 are fixedly installed on the inlet 701 and overflow outlet, respectively. The overflow valve 704 and the water supply valve 702 are connected to a water supply pipe and an overflow pipe, respectively. The water supply pipe is connected to a water supply pipe. Both the overflow valve 704 and the water supply valve 702 are connected to the water level sensor, which senses the water level in the water storage tank 700 and controls the opening and closing of the overflow valve 704 and the water supply valve 702 based on the water level data. The bottom of the water storage tank 700 has guide plates on both sides and a drain valve 703 in the middle of the bottom. A drain pipe is located at the lower end of the drain valve 703. The drain valve 703 opens periodically to discharge sewage and sediment from the water storage tank 700. The water supply valve 702 can be opened when the water storage tank 700 is short of water, allowing the water supply pipe to supply water to the water storage tank 700. When it rains or during flushing, the guide channel 203 can collect rainwater or flushing water and guide it into the water storage tank 700 for storage. After the water volume reaches a predetermined value, the overflow valve 704 opens to discharge the excess rainwater. The drain valve 703 opens periodically to discharge sewage and sediment in the water storage tank 700. The overflow valve 704 and the water supply valve 702 are used to keep the water level in the water storage tank 700 between the water inlet and the water outlet 701.

[0043] The water storage tank 700 also includes a cleaning frame 800 and a drive gear 304. The outer wall of the cleaning frame 800 slides against the inner wall of the water storage tank 700. A lifting rack 801 is fixedly mounted on the cleaning frame 800. The drive gear 304 is connected to the end of the drive screw 301, and the drive gear 304 meshes with the lifting rack 801. A reducer 303 is fixedly mounted on the inner wall of the water storage tank 700. The drive screw 301 passes through the water storage tank 700 and is connected to the input shaft of the reducer 303 via a coupling. The drive gear 304 is fixedly connected to the end of the output shaft of the reducer 303. The reducer 303 coordinates the stroke of the cleaning plate 400 and the cleaning frame 800, so that when the drive screw 301 drives the cleaning plate 400 to reciprocate once, the drive screw 301 simultaneously drives the cleaning frame 800 to rise and fall once through the meshing structure of the drive gear 304 and the lifting rack 801.

[0044] The cleaning frame 800 contains multiple rotating shafts 810 and multiple permeable plates. The inner wall of the cleaning frame 800 has multiple paired rotating holes. Both ends of the rotating shafts 810 are rotatably disposed within these rotating holes. The permeable plates are fixedly connected to the rotating shafts 810 on their sides. Two support strips 803 are provided at the bottom of the cleaning frame 800 to support the permeable plates. A limiting block 802 is also provided inside the cleaning frame 800 to limit the rotation angle of the permeable plates. The permeable plate rotation includes a frame plate 811 and a permeable filter screen 812 fixed within the frame plate 811. The permeable filter screen 812 can be made of fiber filter cloth, which has slow water permeability and the ability to filter impurities. The overall density of the permeable plate is slightly greater than the density of water. As the permeable plate inside the cleaning frame 800 descends and enters the water surface of the water storage tank 700, the water resistance causes the rotating shaft 810 at the edge of the permeable plate to rotate, thus creating an opening gap inside the cleaning frame 800. Water in the water storage tank 700 and floating impurities on the water surface flow through this opening gap to the top of the cleaning frame 800. During the upward movement of the cleaning frame 800, the permeable plate returns to its original position under the action of gravity and is supported on the support bar 803, closing the opening gap. The cleaning frame 800 rises to its original position and detaches from the water surface. In this way, floating impurities and some suspended impurities in the water storage tank 700 are left on the permeable plate. During the descent and ascent of the cleaning frame 800, floating impurities and some suspended impurities in the water storage tank 700 can be retrieved. The water storage tank 700 is equipped with an openable cover, and the impurities retrieved from the cleaning frame 800 can be periodically cleaned manually. The cover is also equipped with a receiving sleeve to accommodate the lifting rack 801.

[0045] This invention, through the linkage of the drive screw 301, drive gear 304, and lifting rack 801, coordinates the reciprocating movement of the cleaning plate 400 with the lifting movement of the cleaning frame 800. During the cleaning of the photovoltaic panel 200, the cleaning frame 800 is simultaneously driven to move up and down. During the lifting and lowering process, the permeable plate inside the cleaning frame 800 utilizes the resistance and buoyancy of water to automatically "scoop up" and separate floating impurities (such as leaves, dust clumps, etc.) from the water surface, effectively preventing blockages in the circulating water system. This device not only collects rainwater, improving water resource utilization, but also periodically cleans deposited and floating impurities in the water storage tank 700. This ensures the long-term reliability of the entire water circulation system and reduces the maintenance frequency and operating costs of the photovoltaic device.

[0046] It should be noted that the high-efficiency heat dissipation photovoltaic power generation device of the present invention also includes a temperature sensor, a control unit, and a power supply unit. The temperature sensor is mounted on the frame 100. The control unit and the power supply unit are both connected to the drive motor 300, the air pump 600, the water pump 500, the electromagnetic three-way valve 610, the overflow valve 704, the water supply valve 702, the temperature sensor, and the water level sensor. The power supply unit is used to supply power to the above-mentioned components, and the control unit is used to control the above-mentioned components to work together.

[0047] refer to Figure 12 The present invention also provides a cooling and cleaning method for a high-efficiency heat dissipation photovoltaic power generation device, the method using the above-mentioned high-efficiency heat dissipation photovoltaic power generation device; the method includes the following steps: S1: The water pump 500 continuously inputs water from the water tank into the cleaning tank 202, thereby wetting the flexible scrubbing block 410. The rinsed water flows back into the water storage tank 700 through the guide channel 203. During the water pumping process, the water flows through the flow channel cavity to cool the photovoltaic panel 200. S2: The drive motor 300 drives the drive screw 301 to rotate first in the forward direction and then in the reverse direction; during this process, the cleaning plate 400 drives the flexible scrubbing block 410 to move back and forth on the photovoltaic panel 200; so that the flexible scrubbing block 410 scrubs the surface of the photovoltaic panel 200 back and forth. The drive screw 301 drives the cleaning frame 800 to move back and forth in the water storage tank 700 through the meshing structure of the drive gear 304 and the lifting rack 801. When the rotating permeable plate descends, it is completely immersed in the water. Its side away from the rotating shaft 810 rotates upward first under the action of water surface resistance, so that the floating impurities on the water surface float to the top of the rotating permeable plate under the action of buoyancy. The rotating permeable plate rises and resets, separating the floating impurities from the water. During the process of the drive motor 300 driving the drive screw 301 to rotate, the air pump 600 extracts the gas from the frame 100 and introduces it into the air guide chamber 404, and then sprays it out from the exhaust port, thereby blowing away the floating impurities on the photovoltaic panel 200 in advance and drying the residual water on the photovoltaic panel 200 after wiping, while reducing the surface temperature of the photovoltaic panel 200. S3: The water pump 500 continuously pumps water from the tank into the cleaning tank 202 to clean the flexible scrubbing block 410. At the same time, water flows into the flow channel cavity to cool the photovoltaic panel 200. The above steps S1-S3 are executed periodically.

[0048] S4: The temperature sensor senses the ambient temperature. If the ambient temperature exceeds the first predetermined value, the execution frequency of steps S1-S3 is increased (the execution cycle of steps S1-S3 is shortened).

[0049] In a more preferred method, the above steps S1-S3 are performed periodically, mainly for cleaning the photovoltaic panel 200. If the temperature exceeds the third temperature value, the air pump 600 continuously draws air and discharges it from the second air outlet 611 for continuous air cooling. If the temperature exceeds the second temperature value, in addition to continuous air cooling, step S1 is continued to perform air cooling and water cooling simultaneously. If the temperature exceeds the first temperature value, step S4 is performed, that is, the execution frequency of steps S1-S3 is increased. While continuously performing air cooling and water cooling simultaneously, the photovoltaic panel 200 is also moistened and air is blown on it for evaporative cooling, further improving the heat dissipation and cooling effect of the photovoltaic panel 200.

[0050] The first temperature value > the second temperature value > the third temperature value > the optimal power generation temperature value of the photovoltaic panel (the optimal operating temperature of the photovoltaic panel is about 25°C. For every 1°C increase in temperature, the efficiency of most photovoltaic panels will decrease by about 0.3% to 0.5%).

[0051] In this document, the directional terms such as front, back, top, and bottom are defined based on the location of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application.

[0052] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 high-efficiency heat dissipation photovoltaic power generation device, characterized in that: It includes a frame (100), a photovoltaic panel (200), a water storage tank (700), and a cleaning assembly. The photovoltaic panel (200) is fixed inside the frame (100). The photovoltaic panel (200) is provided with a cleaning tank (202) and a guide channel (203) communicating with the cleaning tank (202) at its end. The cleaning assembly includes a drive motor (300), a drive screw (301), a guide rod (302), and a cleaning plate (400). The bottom of the cleaning plate (400) is provided with a flexible scrubbing block (410). The two ends of the cleaning plate (400) are respectively provided with a threaded sleeve (401) and a guide sleeve (402). The guide rod (302) is fixed to one side of the frame body (100), and the drive screw (301) is rotatably disposed on the other side of the frame body (100). The drive screw (301) and the guide rod (302) pass through the threaded sleeve (401) and the guide sleeve (402) respectively. The end of the drive screw (301) is connected to the output shaft of the drive motor (300). The water storage tank (700) is provided with an inlet (701), which is connected to the guide channel (203); a water pump (500) is provided inside the frame (100), which is connected to the water storage tank (700) through an input water pipe (501); a water-cooled guide plate (201) is provided at the bottom of the photovoltaic panel (200), and a flow channel cavity is provided inside the water-cooled guide plate (201). A first guide pipe (502) and a second guide pipe (503) are respectively connected to both ends of the flow channel cavity. The first guide pipe (502) is connected to the water pump (500), and the second guide pipe (503) is connected to the end of the cleaning tank (202).

2. The photovoltaic power generation device with high-efficiency heat dissipation according to claim 1, characterized in that: The frame (100) is provided with ventilation openings and air extraction boxes (601) on both sides respectively. The air extraction box (601) is connected to the cavity inside the frame (100). The air extraction box (601) is provided with an air extraction pump (600), and the air extraction pump (600) is provided with an exhaust port at the top. A temperature sensor is also provided on the frame (100).

3. The photovoltaic power generation device with high-efficiency heat dissipation according to claim 2, characterized in that: The cleaning plate (400) has two shaped air guide chambers (404) inside, which are located on both sides of the flexible scrubbing block (410). The bottom of the cleaning plate (400) has two rows of air blowing holes (403), each row of air blowing holes (403) is connected to an air guide chamber (404). The top of the cleaning plate (400) has two air inlets. Both rows of air blowing holes (403) are inclined outward. The top of the cleaning plate (400) is also provided with an air inlet connector, and the air inlet connector is provided with a connector pipe (613). The two connector pipes (613) are respectively connected to the two air inlets. The air inlet connector is connected to the air pump (600) through a flexible conduit (612).

4. The photovoltaic power generation device with high-efficiency heat dissipation according to claim 3, characterized in that: The top of the air pump (600) is also provided with an electromagnetic three-way valve (610), which is connected to the exhaust port of the air pump (600). The electromagnetic three-way valve (610) has a first air outlet and a second air outlet (611), and the first air outlet is connected to the flexible conduit (612).

5. A high-efficiency heat dissipation photovoltaic power generation device according to claim 3, characterized in that: The water storage tank (700) is provided with a water inlet and a filter cover (710). The water inlet is located below the water inlet (701). The filter cover (710) is connected to the water storage tank (700) and closes the water inlet. The filter cover (710) is provided with a filter screen. The filter cover (710) is connected to the first guide pipe (502).

6. The photovoltaic power generation device with high-efficiency heat dissipation according to claim 3, characterized in that: The water storage tank (700) is equipped with a water level sensor. The water storage tank (700) has an inlet (701) and an overflow outlet on both sides. An overflow valve (704) and a water supply valve (702) are fixed on the inlet (701) and the overflow outlet, respectively. The overflow valve (704) and the water supply valve (702) are respectively connected to a water supply pipe and an overflow pipe. The water supply pipe is connected to the water supply pipeline. The overflow valve (704) and the water supply valve (702) are both connected to the water level sensor. The water level sensor is used to sense the water level in the water storage tank (700) and control the opening and closing of the overflow valve (704) and the water supply valve (702) according to the water level data in the water storage tank (700). The water storage tank (700) has guide plates on both sides of the bottom and a drain valve (703) in the middle of the bottom. The drain valve (703) has a drain pipe at the lower end. The drain valve (703) is opened periodically to discharge the sewage and sediment in the water storage tank (700).

7. The photovoltaic power generation device with high-efficiency heat dissipation according to claim 1, characterized in that: The water storage tank (700) is also provided with a cleaning frame (800) and a drive gear (304), and the outer wall of the cleaning frame (800) slides against the inner wall of the water storage tank (700); The cleaning frame (800) is fixedly provided with a lifting rack (801), and the drive gear (304) is connected to the end of the drive screw (301), and the drive gear (304) meshes with the lifting rack (801); The cleaning frame (800) is provided with multiple rotating shafts (810) and multiple permeable plates. The inner wall of the cleaning frame (800) is provided with multiple pairs of rotating holes. Both ends of the rotating shafts (810) are rotatably disposed in the rotating holes. The side of the permeable plate is fixedly connected to the rotating shafts (810).

8. The photovoltaic power generation device with high-efficiency heat dissipation according to claim 7, characterized in that: A reducer (303) is fixedly installed on the inner wall of the water storage tank (700). The drive screw (301) passes through the water storage tank (700) and is connected to the input shaft of the reducer (303). The drive gear (304) is fixedly connected to the end of the output shaft of the reducer (303).

9. A high-efficiency heat dissipation photovoltaic power generation device according to claim 7, characterized in that: The bottom of the cleaning frame (800) is provided with two support strips (803), which are used to support the permeable plate; The cleaning frame (800) is also provided with a limiting block (802) inside, which is used to limit the rotation angle of the permeable plate; The permeable plate rotation includes a frame plate body (811) and a permeable filter screen (812) fixed inside the frame plate body (811).

10. A cooling and heat dissipation method for a high-efficiency heat dissipation photovoltaic power generation device, characterized in that: This method uses the high-efficiency heat dissipation photovoltaic power generation device according to any one of claims 1-9; the method includes the following steps: S1: The water pump (500) continuously inputs water from the tank into the cleaning tank (202) to wet the flexible scrubbing block (410). The rinsed water flows back into the storage tank (700) through the guide channel (203). During the water pumping process, the water flows through the flow channel cavity to cool the photovoltaic panel (200). S2: The drive motor (300) drives the drive screw (301) to rotate in the forward direction first, and then in the reverse direction; during this process, the cleaning plate (400) drives the flexible scrubbing block (410) to move back and forth on the photovoltaic panel (200); so that the flexible scrubbing block (410) scrubs the surface of the photovoltaic panel (200) back and forth; The drive screw (301) drives the cleaning frame (800) to move back and forth in the water tank (700) through the meshing structure of the drive gear (304) and the lifting rack (801); when the rotating permeable plate descends, it is completely immersed in the water, and its side away from the rotating shaft (810) rotates upward first under the action of water surface resistance, so that the floating impurities on the water surface float to the top of the rotating permeable plate under the action of buoyancy; the rotating permeable plate rises to reset, separating the floating impurities from the water; During the rotation of the drive screw (301) driven by the drive motor (300), the air pump (600) extracts the gas from the frame body (100) and introduces it into the air guide cavity (404), and sprays it out from the exhaust port, thereby blowing away the floating impurities on the photovoltaic panel (200) in advance and drying the residual water on the photovoltaic panel (200) after wiping, while reducing the surface temperature of the photovoltaic panel (200); S3: The water pump (500) continuously pumps water from the tank into the cleaning tank (202) to clean the flexible scrubbing block (410), while water flows into the flow channel cavity to cool the photovoltaic panel (200); S4: The temperature sensor senses the ambient temperature. If the ambient temperature exceeds a first predetermined value, the execution frequency of steps S1-S3 is increased.

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