Concentrating double-sided photovoltaic string system based on rectification air film cooling

Abstract

The invention relates to the technical field of double-sided photovoltaic strings, in particular to a concentrating double-sided photovoltaic string system based on rectification gas film cooling, which comprises a bracket, a rectifying gas film cooling module, a rectifying gas film cooling module, a rectifying gas film cooling module, a rectifying gas film cooling module, a rectifying gas film cooling module and a rectifying gas film cooling module, and is characterized in that the bracket is provided with a photovoltaic string used for converting solar energy into electric energy; the light condensation assembly is used for focusing solar energy to the photovoltaic string; the cooling assembly comprises air cooling mechanisms and liquid cooling mechanisms, the air cooling mechanisms are symmetrically arranged on the two sides of the photovoltaic string, the air cooling mechanisms are used for conducting air cooling heat dissipation on the photovoltaic string, and the liquid cooling mechanisms are used for conducting liquid cooling heat dissipation on the photovoltaic string; the cleaning assembly comprises a moving frame, a mounting mechanism, a moving mechanism, a wiping mechanism and a coating mechanism; according to the system, through gas film-liquid cooling collaborative design and integration of the cleaning device, linkage of cleaning and heat dissipation is achieved, part redundancy is reduced, the operation and maintenance cost is reduced, and the compactness of the system and the reliability of continuous power generation are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of double-sided photovoltaic strings, and in particular to a concentrating double-sided photovoltaic string system based on rectifying air film cooling. Background Art

[0002] As photovoltaic power generation technology develops towards high power density and intelligence, bifacial photovoltaic modules, due to their ability to receive light on both the front and back sides, can significantly increase power generation compared to single-sided modules in scenarios with high ground reflectivity or optimized installation angles.

[0003] However, traditional air cooling technology has insufficient heat dissipation efficiency in high-temperature and high-irradiation environments, which can easily lead to component overheating, reduced efficiency, and even shortened lifespan. At the same time, dust accumulation on the surface of photovoltaic panels will seriously reduce the transmittance, and manual cleaning is costly and inefficient. Existing cleaning devices mostly rely on external power and are difficult to coordinate with the cooling system. Summary of the Invention

[0004] The object of the present invention is to provide a concentrating bifacial photovoltaic string system based on rectifying air film cooling to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A concentrating bifacial photovoltaic string system based on rectifying air film cooling, comprising:

[0007] A bracket, on which a photovoltaic string is arranged, the photovoltaic string being used to convert solar energy into electrical energy;

[0008] Concentrating components are symmetrically arranged on both sides of the bracket, and are used to focus solar energy onto the photovoltaic strings;

[0009] A cooling assembly, comprising an air cooling mechanism and a liquid cooling mechanism, wherein the air cooling mechanism is symmetrically arranged on both sides of the photovoltaic string, the air cooling mechanism is used to perform air cooling and heat dissipation on the photovoltaic string, and the liquid cooling mechanism is used to perform liquid cooling and heat dissipation on the photovoltaic string;

[0010] A cleaning component includes a movable frame, an installation mechanism, a moving mechanism, a wiping mechanism and a coating mechanism. The installation mechanism is used to install the movable frame on the photovoltaic string. The movable mechanism is used to use the liquid flow in the liquid cooling mechanism to drive the movable frame to move. The liquid transmission mechanism is used to spray the cooling water in the liquid cooling mechanism onto the upper surface of the photovoltaic string. The wiping mechanism is used to wipe the surface of the photovoltaic string with cooling water.

[0011] Preferably, the photovoltaic string includes a mounting frame and a plurality of double-sided photovoltaic panels, and the double-sided photovoltaic panels are arranged on the mounting frame at equal intervals.

[0012] Preferably, the double-sided photovoltaic panel includes a double-sided photovoltaic cell, an EVA film and a glass cover plate, and the EVA film and the glass cover plate are sequentially arranged on both sides of the double-sided photovoltaic cell from the inside to the outside.

[0013] Preferably, the focusing assembly includes a parabolic focusing mirror, which is symmetrically arranged on both sides of the bracket, and is used to focus solar energy onto the top of the double-sided photovoltaic cell.

[0014] Preferably, the air cooling mechanism includes a straightening cylinder, a fan and a guide plate. The straightening cylinder is symmetrically arranged on both sides of the bracket. A straightening air film is arranged inside the straightening cylinder. The fan is arranged at the air inlet of the straightening cylinder, and the guide plate is connected to the air outlet of the straightening cylinder.

[0015] Preferably, the liquid cooling mechanism includes a cooling water storage tank, a water pump, a connecting pipe, a return pipe, a cooling pipe and a three-way valve. The cooling water storage tank, the water pump and the connecting pipe are symmetrically arranged on both sides of the bracket. The cooling water storage tank is used to store cooling water. The output end of the water pump is connected to the connecting pipe. The symmetrically arranged connecting pipes are interconnected with the cooling pipe through the three-way valve. Several cooling pipes are provided. The water pump is used to input the cooling water in the cooling water storage tank into the connecting pipe. The connecting pipe is connected to the return pipe through the three-way valve. The return pipe is used to interconnect the connecting pipe and the cooling water storage tank. The return pipe and the connecting pipe are connected to each other through the three-way valve so that the cooling water after cooling in the connecting pipe can flow back to the cooling water storage tank.

[0016] Preferably, the mounting mechanism includes a mounting block and fixing bolts, and the mounting block is fixedly connected to the movable frame via the fixing bolts.

[0017] Preferably, the moving mechanism includes a magnetic moving block, a connecting solenoid valve, a position sensor and a magnetic wheel. The magnetic moving block is movably connected to the cooling pipe. The connecting solenoid valve is arranged on the magnetic moving block. The position sensor is used to detect the position of the magnetic moving block in the cooling pipe. The magnetic wheel is arranged on the mounting block. The magnetic moving block and the magnetic wheel attract each other.

[0018] Preferably, the wiping mechanism includes a fitting push rod, a connecting rod and a wiping block, the fitting push rod is arranged on the movable frame, the connecting rod is connected to the fitting push rod, and the wiping block is arranged on the connecting rod.

[0019] Preferably, the liquid transmission mechanism includes a three-way valve 2 and a nozzle, the three-way valve 2 is used to connect the three-way valve 1 and the cooling pipe to each other, and the other outlet of the three-way valve 2 is connected to the nozzle.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: in this system, an air-cooling mechanism with a rectifying air film and a liquid-cooling mechanism are integrated, and a high-speed and uniform wind curtain is formed by utilizing the air-cooling mechanism with a rectifying air film. The air-cooling mechanisms arranged on both sides take away the heat of the double-sided photovoltaic panels through forced convection heat exchange, and combine with liquid cooling to quickly take away the heat. While the liquid cooling mechanism is working, the moving mechanism of the cleaning component can be driven to drive the wiping mechanism to clean the double-sided photovoltaic panels. This system realizes the linkage between cleaning and heat dissipation through the collaborative design of air film-liquid cooling and the integration of the cleaning device, reduces component redundancy, reduces operation and maintenance costs, and greatly improves the system compactness and the reliability of continuous power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the axial structure of the present invention Figure 1 ;

[0022] Figure 2 Schematic diagram of the axial structure of the present invention Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the explosion structure of the double-sided photovoltaic panel of the present invention;

[0024] Figure 4 This is a schematic diagram of the position structure of the connecting pipe, three-way valve 1 and three-way valve 2 of the present invention;

[0025] Figure 5 This is a schematic diagram of the connection structure between the three-way valve 2 and the nozzle of the present invention;

[0026] Figure 6 This is a schematic diagram of the connection structure between the mobile frame and the mounting block of the present invention;

[0027] Figure 7 This is a schematic diagram of the position structure of the cooling pipe and the magnetic moving block of the present invention;

[0028] Figure 8 Schematic diagram of the parabolic concentrator and double-sided photovoltaic panel in the XY plane of the present invention.

[0029] In the figure: 1 bracket, 2 movable frame, 3 mounting frame, 4 double-sided photovoltaic panel, 5 parabolic concentrator, 6 rectifier tube, 7 fan, 8 guide plate, 9 cooling water storage tank, 10 water pump, 11 connecting pipe, 12 return pipe, 13 cooling pipe, 14 three-way valve 1, 15 mounting block, 16 fixing bolt, 17 magnetic movable block, 18 connecting solenoid valve, 19 position sensor, 20 magnetic wheel, 21 fitting push rod, 22 connecting rod, 23 wiping block, 24 three-way valve 2, 25 nozzle, 401 double-sided photovoltaic cell, 402 EVA film, 403 glass cover. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 1-8 , the present invention provides a technical solution:

[0032] A concentrating double-sided photovoltaic string system based on rectifier air film cooling, as shown in the attached manual. Figure 1 Shown, including:

[0033] Bracket 1, which can be adjusted in height, is provided with a photovoltaic string for converting solar energy into electrical energy;

[0034] Concentrating components are symmetrically arranged on both sides of the bracket 1, and the concentrating components are used to focus solar energy onto the photovoltaic strings;

[0035] The cooling assembly includes an air cooling mechanism and a liquid cooling mechanism. The air cooling mechanism is symmetrically arranged on both sides of the photovoltaic string. The air cooling mechanism is used to cool the photovoltaic string with air, and the liquid cooling mechanism is used to cool the photovoltaic string with liquid;

[0036] The cleaning component includes a mobile frame 2, an installation mechanism, a moving mechanism, a wiping mechanism and a coating mechanism. The installation mechanism is used to install the mobile frame 2 on the photovoltaic string. The moving mechanism is used to use the liquid flow in the liquid cooling mechanism to drive the mobile frame 2 to move. The liquid transmission mechanism is used to spray the cooling water in the liquid cooling mechanism onto the upper surface of the photovoltaic string. The wiping mechanism is used to wipe the surface of the photovoltaic string with cooling water.

[0037] The photovoltaic string includes a mounting frame 3 and several double-sided photovoltaic panels 4. The mounting frame 3 is connected to the bracket 1. The mounting frame 3 is a frame made of aluminum alloy material. The double-sided photovoltaic panels 4 are arranged at equal intervals on the mounting frame 3. In this embodiment, two double-sided photovoltaic panels 4 are provided, and the two double-sided photovoltaic panels 4 are symmetrically arranged on both sides of the mounting frame 3.

[0038] The double-sided photovoltaic panel 4 includes a double-sided photovoltaic cell 401, an EVA film 402 and a glass cover 403. In order to facilitate the display of the cooling tube in the drawings of the specification, the spacing between each photovoltaic unit in the double-sided photovoltaic cell 401 is increased. It is hereby explained that the top of the double-sided photovoltaic cell 401 is used to receive direct solar radiation and scattered radiation concentrated by the parabolic concentrator 5, and the bottom of the double-sided photovoltaic cell 401 is used to receive solar radiation reflected from the ground and scattered from the sky. EVA film 402 and glass cover 403 are sequentially provided on both sides of the double-sided photovoltaic cell 401 from the inside to the outside. The EVA film 402 is used to fill the gap between the glass cover 403 and the double-sided photovoltaic cell 401 and plays a role in protecting the double-sided photovoltaic cell 401. It has a high transmittance. The glass cover 403 has a high transmittance for sunlight and has good water resistance, moisture resistance and impact resistance, which can effectively prevent the internal double-sided photovoltaic cell 401 from being damaged.

[0039] The focusing assembly includes a parabolic concentrator 5, which is symmetrically arranged on both sides of the bracket 1. The upper ends of the symmetrical compound parabolic concentrator 5 are enclosed to form a light through hole of the symmetrical compound parabolic concentrator 5. The parabolic concentrator 5 is used to focus solar energy onto the top of the double-sided photovoltaic cell 401.

[0040] In the present invention, the design method of the symmetrical parabolic condenser 5 is as follows:

[0041] The center point of the connection between the two bifacial photovoltaic panels 4 is used as the origin, the left-right direction (i.e., the width direction of the bifacial photovoltaic panel 4) is set as the X-axis, the front-back direction (i.e., the length direction of the bifacial photovoltaic panel 4) is set as the Z-axis, and the center normal of the front glass cover 403 is set as the Y-axis; if the parabolic concentrator 5 is symmetrically arranged with a length of l, then the parabolic concentrator 5 is formed by extending the parabola segment along the positive and negative directions of the Z-axis by l / 2 respectively, and the symmetrical compound parabolic concentrator 512 is the same length as the long side of the bifacial photovoltaic string;

[0042] As the instruction manual Figure 8 As shown, the equation of the parabola segment on the left side in the XY plane is:

[0043]

[0044] The equation of the parabola segment on the right side in the XY plane is:

[0045]

[0046] In formulas (1) to (2), x is the parametric equation of the horizontal coordinate of the parabola segment; y is the parametric equation of the vertical coordinate of the parabola segment; w is the width of the bifacial photovoltaic string 6, in meters; θ i is the polar angle of the incident light, in degrees; θ iThe size of the x and y coordinates is limited; θ m The maximum receiving half angle of the symmetrical parabolic condenser 5 is in degrees. By adjusting θ m The value of changes the light receiving range and geometric focusing ratio of the condenser; the geometric focusing ratio of the symmetrically arranged parabolic condenser 5 is 1 / sin(θ m In the present invention, the focus of the parabolic concentrator 5 falls on the outer edge of the long side of the double-sided photovoltaic panel 4, and the light through hole of the symmetrical parabolic concentrator 5 is parallel to the front glass cover 403 of the double-sided photovoltaic string.

[0047] The air cooling mechanism includes a rectifier cylinder 6, a fan 7 and a guide plate 8. The rectifier cylinder 6 is symmetrically arranged on both sides of the bracket 1. A rectifier air film is arranged inside the rectifier cylinder 6. The rectifier air film is used to adjust the airflow in the rectifier cylinder 6 so that the airflow inside the rectifier cylinder 6 is more stable and input to the guide plate 8. The fan 7 is provided with an air inlet of the rectifier cylinder 6. The fan 7 is used to input the airflow into the rectifier cylinder 6. The fan 7 is driven by direct current and can be driven by the electric energy generated by the double-sided photovoltaic panel 4. The guide plate 8 is connected to the air outlet of the rectifier cylinder 6. The guide plate 8 is used to guide the airflow into the surface of the double-sided photovoltaic panel 4 and remove dust on the glass cover 403.

[0048] The liquid cooling mechanism includes a cooling water storage tank 9, a water pump 10, a connecting pipe 11, a return pipe 12, a cooling pipe 13 and a three-way valve 14. The cooling water storage tank 9, the water pump 10 and the connecting pipe 11 are symmetrically arranged on both sides of the bracket 1. The cooling water storage tank 9 is used to store cooling water. The output end of the water pump 10 is connected to the connecting pipe 11. The cooling pipe 13 is set to pass through the glass cover plate 403 of different double-sided photovoltaic panels 4. The symmetrically arranged connecting pipes 11 are interconnected with the cooling pipe 13 through the three-way valve 14. There are several cooling pipes 13. The water pump 10 is used to input the cooling water in the cooling water storage tank 9 into the connecting pipe 11. The connecting pipe 11 is connected to the return pipe 12 through the three-way valve 14. The return pipe 12 is used to connect the connecting pipe 11 and the cooling water storage tank 9. The return pipe 12 and the connecting pipe 11 are connected to each other through the three-way valve 14 to allow the cooling water after cooling in the connecting pipe 11 to flow back to the cooling water storage tank 9.

[0049] The mounting mechanism includes a mounting block 15 and a fixing bolt 16. The mounting block 15 is used to limit the moving direction of the mobile frame 2 so that the mobile frame 2 can only move along the long side direction of the double-sided photovoltaic panel 4. The mounting block 15 is also used to install the magnetic wheel 20. The mounting block 15 is fixedly connected to the mobile frame 2 by the fixing bolt 16.

[0050] The moving mechanism includes a magnetic moving block 17, a connecting solenoid valve 18, a position sensor 19 and a magnetic wheel 20. In this embodiment, seven cooling pipes are arranged in parallel. The magnetic moving block is movably connected to the cooling pipe 13 at the side of the mounting frame, and the magnetic moving block 17 can attract the adjacent magnetic wheel 20. The magnetic moving block 17 is a cylindrical structure. The diameter of the magnetic moving block 17 is the same as the inner wall aperture of the cooling pipe 13. A rubber ring is provided at the connection between the magnetic moving block 17 and the cooling pipe 13. Therefore, when the connecting solenoid valve 18 is not opened, the magnetic moving block 17 will move along the cooling pipe 13 under the action of the water flow, and the connecting The solenoid valve 18 is arranged on the magnetic moving block 17, and the position sensor 19 is arranged at the outlet of the three-way valve 24. The position sensor 19 is an infrared distance sensor with a waterproof function. The position sensor 19 is used to detect the position of the magnetic moving block 17 in the cooling pipe 13. The magnetic wheel 20 includes a magnetic block and a roller. The magnetic block and the roller are coaxially connected. The magnetic block and the magnetic moving block 17 can attract each other. The roller is connected to the magnetic block. Therefore, when the magnetic moving blocks 17 move with each other, the movable frame 2 can be driven to move by the roller. The magnetic wheel 20 is arranged on the mounting block 15, and the magnetic moving block 17 and the magnetic wheel 20 attract each other.

[0051] The wiping mechanism includes a fitting push rod 21, a connecting rod 22 and a wiping block 23. The fitting push rod 21 is used to drive the connecting rod 22 to move, thereby driving the wiping block 23 to fit the glass cover 403 of the double-sided photovoltaic panel 4. The fitting push rod 21 is set on the mobile frame 2, and the connecting rod 22 is connected to the fitting push rod 21. The two ends of the connecting rod 22 are slidably connected to the slide groove on the side wall of the mobile frame 2, and the wiping block 23 is set on the connecting rod 22.

[0052] The liquid transmission mechanism includes a three-way valve 2 24 and a nozzle 25. Both the three-way valve 1 14 and the three-way valve 2 24 can be opened and closed at any outlet by electromagnetic control. The three-way valve 2 24 is used to connect the three-way valve 1 14 and the cooling pipe 13 to each other. The other outlet of the three-way valve 2 24 is connected to the nozzle 25, which is used to spray cooling water onto the surface of the glass cover 403.

[0053] Working principle: In the present invention, a symmetrical parabolic concentrator 5 is used to converge direct solar radiation and scattered radiation from the light through hole onto the front glass cover plate 403 in the bifacial photovoltaic string to increase the irradiation flux of the front glass cover plate 403, so that the bifacial photovoltaic cell 401 has more energy to be converted into electrical energy, thereby reducing the power generation cost and increasing the power generation. The back glass cover plate 403 in the bifacial photovoltaic string is used to receive solar radiation reflected from the ground and scattered from the sky. The solar radiation transmitted by the front glass cover plate 403 and the back glass cover plate 403 passes through the front EVA film 402 and the back EVA film 402 and is absorbed by the front and back sides of the bifacial photovoltaic cell 401. Part of the solar radiation is converted into electrical energy through the photovoltaic effect, and the remaining part of the solar radiation is converted into heat energy, which increases the operating temperature of the bifacial photovoltaic cell 401.

[0054] When the bifacial photovoltaic panel 4 is working, the fan 7 generates airflow, which is then input into the guide plate 8 after passing through the rectifying air film and then input into the front and back sides of the bifacial photovoltaic panel 4 to cool the photovoltaic panel; at the same time, the water pump 10 inputs the cooling water in the cooling water storage tank 9 on one side into the cooling pipe 13, and by opening the three-way valve 14, the cooling water in the cooling pipe 13 is transported to the cooling water storage tank 9 on the other side through the return pipe 12;

[0055] When cleaning is required, some cooling water is first sprayed onto the upper glass cover plate 403 through the three-way valve 24. Then, by closing the connecting solenoid valve 18 and turning on the water pump 10, the magnetic moving block will move along the cooling pipe 13 under the action of the water flow, and the moving frame 2 will be driven to move through the moving wheel through the action of magnetic attraction, so that the upper glass cover plate 403 is cleaned by the wiping block 23. After wiping, the cooling water is applied to the surface of the upper glass cover plate 403 to form a liquid film. At this time, the blowing of the air cooling mechanism accelerates the evaporation of the surface liquid film to further dissipate heat.

[0056] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A concentrating bifacial photovoltaic string system based on rectifying air film cooling, characterized in that: include: A bracket, on which a photovoltaic string is arranged, the photovoltaic string being used to convert solar energy into electrical energy; Concentrating components are symmetrically arranged on both sides of the bracket, and are used to focus solar energy onto the photovoltaic strings; A cooling assembly, comprising an air cooling mechanism and a liquid cooling mechanism, wherein the air cooling mechanism is symmetrically arranged on both sides of the photovoltaic string, the air cooling mechanism is used to perform air cooling and heat dissipation on the photovoltaic string, and the liquid cooling mechanism is used to perform liquid cooling and heat dissipation on the photovoltaic string; A cleaning component includes a movable frame, an installation mechanism, a moving mechanism, a wiping mechanism and a coating mechanism. The installation mechanism is used to install the movable frame on the photovoltaic string. The moving mechanism is used to use the liquid flow in the liquid cooling mechanism to drive the movable frame to move. The liquid transmission mechanism is used to spray the cooling water in the liquid cooling mechanism onto the upper surface of the photovoltaic string. The wiping mechanism is used to wipe the surface of the photovoltaic string with cooling water.

2. The concentrating bifacial photovoltaic string system based on rectifying air film cooling according to claim 1, characterized in that: The photovoltaic string includes a mounting frame and a plurality of double-sided photovoltaic panels, and the double-sided photovoltaic panels are arranged on the mounting frame at equal intervals.

3. The concentrating bifacial photovoltaic string system based on rectifying air film cooling according to claim 2, characterized in that: The double-sided photovoltaic panel includes a double-sided photovoltaic cell, an EVA film and a glass cover plate. The EVA film and the glass cover plate are sequentially arranged on both sides of the double-sided photovoltaic cell from the inside to the outside.

4. The concentrating bifacial photovoltaic string system based on rectifying air film cooling according to claim 3, characterized in that: The focusing assembly includes a parabolic focusing mirror, which is symmetrically arranged on both sides of the bracket. The parabolic focusing mirror is used to focus solar energy onto the top of the double-sided photovoltaic cell.

5. The concentrating bifacial photovoltaic string system based on rectifying air film cooling according to claim 3, characterized in that: The air cooling mechanism includes a straightening cylinder, a fan and a guide plate. The straightening cylinder is symmetrically arranged on both sides of the bracket. A straightening air film is arranged inside the straightening cylinder. The fan is arranged at the air inlet of the straightening cylinder, and the guide plate is connected to the air outlet of the straightening cylinder.

6. The concentrating bifacial photovoltaic string system based on rectifying air film cooling according to claim 5, characterized in that: The liquid cooling mechanism includes a cooling water storage tank, a water pump, a connecting pipe, a return pipe, a cooling pipe and a three-way valve. The cooling water storage tank, the water pump and the connecting pipe are symmetrically arranged on both sides of the bracket. The cooling water storage tank is used to store cooling water. The output end of the water pump is connected to the connecting pipe. The symmetrically arranged connecting pipes are interconnected with the cooling pipe through the three-way valve. Several cooling pipes are provided. The water pump is used to input the cooling water in the cooling water storage tank into the connecting pipe. The connecting pipe is connected to the return pipe through the three-way valve. The return pipe is used to interconnect the connecting pipe and the cooling water storage tank. The return pipe and the connecting pipe are connected to each other through the three-way valve to allow the cooling water after cooling in the connecting pipe to flow back to the cooling water storage tank.

7. The concentrating bifacial photovoltaic string system based on rectifying air film cooling according to claim 6, characterized in that: The mounting mechanism includes a mounting block and a fixing bolt, and the mounting block is fixedly connected to the movable frame via the fixing bolt.

8. The concentrating bifacial photovoltaic string system based on rectifying air film cooling according to claim 7, characterized in that: The moving mechanism includes a magnetic moving block, a connecting solenoid valve, a position sensor and a magnetic wheel. The magnetic moving block is movably connected to the cooling pipe. The connecting solenoid valve is arranged on the magnetic moving block. The position sensor is used to detect the position of the magnetic moving block in the cooling pipe. The magnetic wheel is arranged on the mounting block. The magnetic moving block and the magnetic wheel attract each other.

9. The concentrating bifacial photovoltaic string system based on rectifying air film cooling according to claim 8, characterized in that: The wiping mechanism includes a laminating push rod, a connecting rod and a wiping block. The laminating push rod is arranged on the moving frame. The connecting rod is connected to the laminating push rod. The wiping block is arranged on the connecting rod.

10. The concentrating bifacial photovoltaic string system based on rectifying air film cooling according to claim 9, characterized in that: The liquid transmission mechanism includes a three-way valve 2 and a nozzle. The three-way valve 2 is used to connect the three-way valve 1 and the cooling pipe to each other. The other outlet of the three-way valve 2 is connected to the nozzle.

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