A self-regulating heat dissipation photovoltaic tile

Abstract

This application discloses a self-regulating heat dissipation photovoltaic tile, including a photovoltaic tile module. The photovoltaic tile module includes a heat dissipation base plate and a photovoltaic tile fixed to the top of the heat dissipation base plate. The heat dissipation base plate has a ventilation cavity inside. An air inlet pipe is fixed and connected to the bottom side of the heat dissipation base plate away from the roof ridge, and a heat dissipation pipe is fixed and connected to the bottom side of the heat dissipation base plate near the roof ridge. The end of the heat dissipation pipe away from the air inlet pipe is inserted into the air inlet pipe at the bottom of the adjacent heat dissipation base plate. A vertical pipe is fixed to one side of the roof, and a heat-gathering cover is fixed to the top of the vertical pipe. A horizontal pipe located at the top of the roof ridge is fixed and connected to one side of the vertical pipe, and a ridge tile is installed on the horizontal pipe. Side air ducts are fixed and connected to both sides of the horizontal pipe, and the lower ends of the side air ducts are inserted into the heat dissipation pipes near the ridge tiles. The heat-gathering cover can accumulate heat and rapidly heat up the air above the vertical pipe. The temperature difference between the upper and lower ends of the vertical pipe creates a chimney effect, ensuring the heat dissipation efficiency of the photovoltaic tile module.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic tile technology, and in particular to a self-regulating heat dissipation photovoltaic tile. Background Technology

[0002] With the increasing global demand for clean energy, solar energy, as a clean and renewable energy source, has received widespread attention and development in its utilization technology. Photovoltaic tiles, as an important product integrating solar photovoltaic power generation with buildings, not only enable buildings to generate electricity but also replace traditional roofing tiles, serving as building envelopes and possessing broad application prospects.

[0003] In practical applications, photovoltaic (PV) tiles inevitably generate a significant amount of heat during the process of absorbing solar energy and converting it into electrical energy. PV tiles are typically installed on building rooftops and other locations where the operating environment is hot. Current PV tile technology relies primarily on natural heat dissipation, which is ineffective. Studies have shown that in practical applications, excessively high temperatures not only significantly reduce the power generation efficiency of PV tiles, decreasing electricity output and increasing power generation costs, but also accelerate the aging of PV modules, shortening their lifespan and increasing subsequent maintenance and replacement costs.

[0004] Therefore, there is an urgent need for a photovoltaic tile that can actively dissipate heat and fully guarantee the heat dissipation effect, so as to ensure the normal use and service life of the photovoltaic tile. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a self-regulating heat dissipation photovoltaic tile.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a self-regulating heat dissipation photovoltaic tile, comprising a photovoltaic tile assembly laid sequentially on the top of a roof, the photovoltaic tile assembly comprising a heat dissipation base plate and a photovoltaic tile fixed to the top of the heat dissipation base plate, the bottom of the heat dissipation base plate being connected to the top of the roof via a snap-fit ​​assembly, the heat dissipation base plate having a ventilation cavity inside, an air inlet pipe fixed and connected to the side of the bottom of the heat dissipation base plate away from the ridge, and a heat dissipation pipe fixed and connected to the side of the bottom of the heat dissipation base plate near the ridge, the heat dissipation pipe having a U-shaped cross-section with an internal hollow structure, the end of the heat dissipation pipe away from the air inlet pipe being inserted into the air inlet pipe at the bottom of its adjacent heat dissipation base plate, a vertical pipe fixed to one side of the roof, a heat-gathering cover fixed to the top of the vertical pipe via a support plate, a horizontal pipe fixed and connected to one side of the vertical pipe and located at the top of the ridge, a ridge tile being provided on the horizontal pipe, side air ducts fixed and connected to both sides of the horizontal pipe, and the lower end of the side air duct being inserted into the heat dissipation pipe near the ridge tile.

[0007] By adopting the above technical solution, the heat-gathering cover is made of a material with good heat-gathering performance. Its top can also be uniformly coated with black paint to enhance the heat-gathering performance. The heat-gathering cover can accumulate heat and make the air at the top of the vertical pipe heat up rapidly, while the air temperature at the bottom of the vertical pipe is lower. The temperature difference between the top and bottom of the vertical pipe creates a chimney effect, causing the airflow to flow upward along the vertical pipe. At the same time, a certain negative pressure is formed in the horizontal pipe. Since the heat dissipation base plates on the roof are connected one by one, the airflow from the roof enters the ventilation cavity of the heat dissipation base plate through the air inlet pipe. The lower end of the side air pipe is inserted into the heat dissipation pipe near the ridge tile. Finally, it enters the vertical pipe through the horizontal pipe and is discharged, taking away some of the heat generated by the photovoltaic tile module absorbing solar energy. This improves the heat dissipation effect of the photovoltaic tile module, which is conducive to ensuring the power generation efficiency of the photovoltaic tile module and extending the service life of the photovoltaic tile module.

[0008] Furthermore, both the air inlet duct and the side air duct are equipped with interception components to prevent crawling insects from entering the ventilation cavity. The interception components include an upper V-shaped metal plate hinged to the inner wall of the air inlet duct or the side air duct and a lower V-shaped metal plate fixed to the bottom of the upper V-shaped metal plate. The side of the upper V-shaped metal plate away from its hinge axis abuts against the inner wall of the air inlet duct or the side air duct. The thermal expansion performance of the lower V-shaped metal plate is greater than that of the upper V-shaped metal plate.

[0009] By adopting the above technical solution, the photovoltaic tile modules are almost inactive at night or on cloudy or rainy days. The interception component, composed of the upper and lower V-shaped metal plates, remains in contact with the inner wall of the air inlet or side air duct under its own weight, effectively blocking insects, dust, and other debris, ensuring the cleanliness of the ventilation cavity. During the process of absorbing solar energy for power generation, the photovoltaic tile modules generate a large amount of heat. As the temperature inside the ventilation cavity rises, the lower V-shaped metal plate, with its more sensitive thermal expansion characteristics compared to the upper V-shaped metal plate, expands more significantly. The side of the upper V-shaped metal plate furthest from its hinge axis bends upward, causing the interception component to open. Airflow from the roof enters the ventilation cavity of the heat dissipation base plate through the air inlet duct and is finally discharged through the vertical pipe, ensuring the heat dissipation effect of the photovoltaic tile modules.

[0010] Furthermore, a negative pressure fan is fixed inside the vertical pipe near its upper end, and a solenoid valve located below the horizontal pipe and controlling the opening and closing of the vertical pipe is installed on the vertical pipe.

[0011] By adopting the above technical solution, after the solenoid valve is closed and the negative pressure fan is turned on, a negative pressure is formed in the vertical and horizontal pipes, which accelerates the efficiency of the external natural air entering the ventilation cavity through the air inlet pipe for heat dissipation and enhances the heat dissipation effect of the photovoltaic tile module.

[0012] Furthermore, heat dissipation fins are attached and fixed to the top wall of the ventilation cavity, and the photovoltaic tile assembly also includes a transparent protective plate fixed to the top of the photovoltaic tile.

[0013] By adopting the above technical solutions, the heat dissipation fins increase the heat absorption and heat dissipation efficiency of the heat dissipation base plate on the photovoltaic tile, and the transparent protective plate provides good protection for the photovoltaic tile.

[0014] Furthermore, a drain pipe is provided inside the heat dissipation pipe, connecting the top and bottom of the heat dissipation pipe. Multiple drain pipes are provided and distributed in a straight line along the roof ridge. An L-shaped sealing strip is provided between the photovoltaic tile module and the side wall of the side air duct.

[0015] By adopting the above technical solution, when the photovoltaic tile module or ridge tile is damaged or there is a gap in the connection between the photovoltaic tile modules, rainwater may enter the heat dissipation pipe. The setting of the drain pipe allows the rainwater that enters the heat dissipation pipe to be discharged in time.

[0016] Furthermore, auxiliary drainage columns are fixed at the bottom of the heat dissipation pipe and at the bottom of the heat dissipation base plate away from the roof ridge. The auxiliary drainage column has an upper hole, a middle hole and a lower hole arranged sequentially from top to bottom. The upper hole is connected to the bottom of the heat dissipation pipe or the bottom of the heat dissipation base plate, and the lower hole is connected to the lower end of the auxiliary drainage column.

[0017] By adopting the above technical solution and setting up the auxiliary drainage column, a small amount of rainwater entering the ventilation cavity can be discharged sequentially through the upper, middle and lower holes, which is beneficial to the normal use of photovoltaic tile modules.

[0018] Furthermore, the inner diameter of the middle part of the central hole is larger than the inner diameters of its two ends, and a float is provided inside the central hole, the outer diameter of which is larger than the inner diameters of the upper and lower holes.

[0019] By adopting the above technical solution, a small amount of water entering the ventilation chamber can easily enter the corresponding auxiliary drainage column. The float rises due to buoyancy, allowing the water in the ventilation chamber to be discharged. After the airflow enters the middle orifice from the lower orifice, it can easily blow up the float and block the upper orifice, so that natural air can only enter through the air inlet pipe and circulate.

[0020] Furthermore, the cross-section of the photovoltaic tile module is wavy, and the auxiliary drainage column at the bottom of the heat dissipation base plate is located in the trough section of the heat dissipation base plate.

[0021] By adopting the above technical solution, the number of auxiliary drainage columns is reduced while ensuring normal drainage of the heat dissipation base plate.

[0022] Furthermore, the fastening assembly includes a snap-fit ​​seat fixed to the bottom of the heat dissipation base plate and an installation plate fixed to the top of the roof. The installation plate has snap-fit ​​grooves on both sides, and the snap-fit ​​seat has a snap-fit ​​part on both sides that engages with the snap-fit ​​groove. The cross-section of the snap-fit ​​part is an inverted right trapezoid.

[0023] By adopting the above technical solution, the snap-fit ​​seat at the bottom of the heat dissipation base plate and the mounting plate on the top of the roof can be quickly snapped together through the snap-fit ​​groove and the snap-fit ​​part, which makes it convenient for workers to install photovoltaic tile modules.

[0024] Furthermore, the distance between the bottom of the air inlet pipe and the top of the roof is greater than the distance between the bottom of the mounting bracket and the top of the roof, with a difference of 1-2 cm.

[0025] By adopting the above technical solution, natural wind can smoothly enter the air intake duct and circulate.

[0026] In summary, the present invention has the following beneficial effects:

[0027] 1. In this application, the heat-collecting cover can accumulate heat and cause the air at the top of the vertical pipe to heat up rapidly. The temperature difference between the top and bottom of the vertical pipe forms a chimney effect, which ensures the heat dissipation efficiency of the photovoltaic tile module, which is conducive to ensuring the power generation efficiency of the photovoltaic tile module and extending the service life of the photovoltaic tile module.

[0028] 2. In this application, the photovoltaic tile module hardly operates at night or on rainy days. The interception component, composed of the upper and lower V-shaped metal plates, remains in contact with the inner wall of the air inlet or side air duct under its own weight, effectively blocking insects, dust, and other debris, ensuring the cleanliness of the ventilation cavity. During the process of absorbing solar energy for power generation, the photovoltaic tile module generates a large amount of heat. As the temperature inside the ventilation cavity rises, the lower V-shaped metal plate, with its more sensitive thermal expansion characteristics compared to the upper V-shaped metal plate, expands more significantly. The side of the upper V-shaped metal plate furthest from its hinge axis bends upward, causing the interception component to open. Airflow from the roof enters the ventilation cavity of the heat dissipation base plate through the air inlet duct and is ultimately discharged through the vertical pipe, ensuring the heat dissipation effect of the photovoltaic tile module. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0030] Figure 2 yes Figure 1 A structural diagram from another perspective;

[0031] Figure 3 This is a cross-sectional structural diagram of a photovoltaic tile module used in an embodiment of the present invention;

[0032] Figure 4yes Figure 3 Enlarged view of point A in the middle;

[0033] Figure 5 yes Figure 3 Enlarged view of point B in the middle;

[0034] Figure 6 This is a cross-sectional structural diagram of the fastening assembly used in an embodiment of the present invention;

[0035] Figure 7 yes Figure 6 Enlarged view of point C in the middle;

[0036] Figure 8 This is a schematic diagram of the structure of the heat pipe used in an embodiment of the present invention.

[0037] In the picture:

[0038] 1. Roof;

[0039] 2. Photovoltaic tile module; 21. Heat dissipation base plate; 211. Ventilation cavity; 212. Air inlet pipe; 213. Heat dissipation pipe; 214. Heat dissipation fins; 22. Photovoltaic tile panel; 23. Transparent protective plate;

[0040] 3. Snap-fit ​​assembly; 31. Snap-fit ​​base; 311. Snap-fit ​​part; 32. Mounting plate; 321. Snap-fit ​​groove;

[0041] 4. Vertical ductwork; 41. Negative pressure fan; 42. Solenoid valve;

[0042] 5. Heat-concentrating cover;

[0043] 6. Horizontal duct; 61. Ridge tile; 62. Side duct;

[0044] 7. Interception component; 71. Upper V-shaped metal plate; 72. Lower V-shaped metal plate;

[0045] 8. Drainage pipe;

[0046] 9. Sealing strip;

[0047] 10. Auxiliary drainage column; 101. Upper orifice; 102. Middle orifice; 1021. Float; 103. Lower orifice. Detailed Implementation

[0048] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0049] like Figure 1-8 As shown in the figure, this application discloses a self-regulating heat dissipation photovoltaic tile, including a photovoltaic tile assembly 2 sequentially laid on the top of a roof 1. The photovoltaic tile assembly 2 includes a heat dissipation base plate 21 and a photovoltaic tile 22 fixed to the top of the heat dissipation base plate 21. The bottom of the heat dissipation base plate 21 is connected to the top of the roof 1 by a fastening assembly 3. A ventilation cavity 211 is provided inside the heat dissipation base plate 21. An air inlet pipe 212 is fixed and connected to the side of the bottom of the heat dissipation base plate 21 away from the ridge. A heat dissipation pipe 213 is fixed and connected to the side of the bottom of the heat dissipation base plate 21 near the ridge. The cross-section of 13 is a U-shaped structure with an internal hollow interior. The end of the heat dissipation pipe 213 away from the air inlet pipe 212 is inserted into the air inlet pipe 212 at the bottom of the adjacent heat dissipation base plate 21. A vertical pipe 4 is fixed on one side of the roof 1. A heat-collecting cover 5 is fixed to the top of the vertical pipe 4 through a support plate. A horizontal pipe 6 located at the top of the ridge is fixed and connected to one side of the vertical pipe 4. A ridge tile 61 is installed on the horizontal pipe 6. Side air pipes 62 are fixed and connected to both sides of the horizontal pipe 6. The lower end of the side air pipe 62 is inserted into the heat dissipation pipe 213 near the ridge tile 61.

[0050] The heat-collecting cover 5 is made of a material with good heat-collecting properties. Its top can also be evenly coated with black paint to enhance the heat-collecting performance. The heat-collecting cover 5 can accumulate heat and make the air at the top of the vertical pipe 4 heat up rapidly. The air temperature at the bottom of the vertical pipe 4 is lower. The temperature difference between the top and bottom of the vertical pipe 4 forms a chimney effect, causing the air to flow upward along the vertical pipe 4. At the same time, a certain negative pressure is formed in the horizontal pipe 6. Since the heat dissipation base plates 21 at the top of the roof 1 are connected one by one, the airflow at the top of the roof 1 enters the ventilation cavity 211 of the heat dissipation base plate 21 from the air inlet pipe 212. The lower end of the side air pipe 62 is connected to the heat dissipation pipe 213 near the ridge tile 61. Finally, it enters the vertical pipe 4 through the horizontal pipe 6 and is discharged, taking away some of the heat generated by the photovoltaic tile module 2 absorbing solar energy. This improves the heat dissipation effect of the photovoltaic tile module 2, which is conducive to ensuring the power generation efficiency of the photovoltaic tile module 2 and extending the service life of the photovoltaic tile module 2.

[0051] Both the air inlet duct 212 and the side air duct 62 are equipped with interception components 7 to prevent crawling insects from entering the ventilation cavity 211. The interception component 7 includes an upper V-shaped metal plate 71 hinged to the inner wall of the air inlet duct 212 or the side air duct 62 and a lower V-shaped metal plate 72 fixed to the bottom of the upper V-shaped metal plate 71. The side of the upper V-shaped metal plate 71 away from its hinge axis abuts against the inner wall of the air inlet duct 212 or the side air duct 62. The thermal expansion performance of the lower V-shaped metal plate 72 is greater than that of the upper V-shaped metal plate 71.

[0052] At night or on rainy days, the photovoltaic tile module 2 hardly works. The interception component 7, composed of the upper V-shaped metal plate 71 and the lower V-shaped metal plate 72, remains in contact with the inner wall of the air inlet duct 212 or the side air duct 62 under its own weight, effectively blocking insects, dust, and other debris, thus ensuring the cleanliness of the ventilation cavity 211. During the process of absorbing solar energy to generate electricity, the photovoltaic tile module 2 generates a large amount of heat. After the temperature inside the ventilation cavity 211 rises, the lower V-shaped metal plate 72, with its more sensitive thermal expansion characteristics compared to the upper V-shaped metal plate 71, causes the lower V-shaped metal plate 72 to expand more significantly. The side of the upper V-shaped metal plate 71 away from its hinge axis bends upward, thereby opening the interception component 7. The airflow from the roof 1 enters the ventilation cavity 211 of the heat dissipation base plate 21 through the air inlet duct 212 and is finally discharged through the vertical pipe 4, ensuring the heat dissipation effect of the photovoltaic tile module 2.

[0053] A negative pressure fan 41 is fixed near the upper end of the vertical pipe 4. A solenoid valve 42, located below the horizontal pipe 6, is installed on the vertical pipe 4 to control its opening and closing. When the solenoid valve 42 is closed and the negative pressure fan 41 is turned on, a negative pressure is formed in the vertical pipe 4 and the horizontal pipe 6, which accelerates the efficiency of external natural air circulation and heat dissipation from the air inlet pipe 212 into the ventilation cavity 211, thereby enhancing the heat dissipation effect of the photovoltaic tile module 2.

[0054] The ventilation cavity 211 has heat dissipation fins 214 attached and fixed to its inner top wall. The photovoltaic tile assembly 2 also includes a transparent protective plate 23 fixed to the top of the photovoltaic tile 22. The heat dissipation fins 214 increase the heat absorption and heat dissipation efficiency of the heat dissipation base plate 21 on the photovoltaic tile 22, and the transparent protective plate 23 provides good protection for the photovoltaic tile 22.

[0055] The heat dissipation pipe 213 is equipped with a drain pipe 8 connecting the top and bottom of the heat dissipation pipe 213. Multiple drain pipes 8 are arranged in a straight line along the roof ridge. An L-shaped sealing strip 9 is installed between the photovoltaic tile assembly 2 and the side wall of the side duct 62. When the photovoltaic tile assembly 2 or the ridge tile 61 is damaged, or when gaps appear in the connection between the photovoltaic tile assemblies 2, rainwater may enter the heat dissipation pipe 213. The drain pipes 8 ensure that rainwater entering the heat dissipation pipe 213 can be discharged promptly.

[0056] Auxiliary drainage columns 10 are fixed at the bottom of the heat dissipation pipe 213 and at the bottom of the heat dissipation base plate 21, away from the roof ridge. Each auxiliary drainage column 10 has, from top to bottom, interconnected upper orifice 101, middle orifice 102, and lower orifice 103. The upper orifice 101 connects to the bottom of the heat dissipation pipe 213 or the bottom of the heat dissipation base plate 21, and the lower orifice 103 connects to the lower end of the auxiliary drainage column 10. The auxiliary drainage column 10 allows a small amount of rainwater entering the ventilation cavity 211 to be discharged sequentially through the upper orifice 101, middle orifice 102, and lower orifice 103, which is beneficial for the normal operation of the photovoltaic tile module 2.

[0057] The inner diameter of the middle part of the central perforated body 102 is larger than the inner diameters of its two ends. A float 1021 is installed inside the central perforated body 102. The outer diameter of the float 1021 is larger than the inner diameter of the upper perforated body 101 and the inner diameter of the lower perforated body 103. A small amount of water entering the ventilation chamber 211 can easily enter the corresponding auxiliary drainage column 10. The float 1021 rises due to buoyancy, allowing the water in the ventilation chamber 211 to be discharged. After the airflow enters the central perforated body 102 from the lower perforated body 103, it can easily blow up the float 1021 and block the upper perforated body 101, so that natural wind can only enter through the air inlet pipe 212 and circulate.

[0058] To ensure normal drainage of the heat dissipation base plate 21 and reduce the number of auxiliary drainage columns 10, the cross-section of the photovoltaic tile module 2 is wavy, and the auxiliary drainage column 10 at the bottom of the heat dissipation base plate 21 is located in the trough section of the heat dissipation base plate 21.

[0059] The fastening assembly 3 includes a snap-fit ​​seat 31 fixed to the bottom of the heat dissipation base plate 21 and an mounting plate 32 fixed to the top of the roof 1. The mounting plate 32 has snap-fit ​​grooves 321 on both sides, and the snap-fit ​​seat 31 has fastening parts 311 on both sides that engage with the snap-fit ​​grooves 321. The cross-section of each fastening part 311 is an inverted right trapezoid. The snap-fit ​​seat 31 at the bottom of the heat dissipation base plate 21 and the mounting plate 32 at the top of the roof 1 are quickly fastened together via the snap-fit ​​grooves 321 and the fastening parts 311, facilitating the installation of the photovoltaic tile assembly 2 by workers.

[0060] To ensure that natural wind enters the air inlet duct 212 and circulates, the distance between the bottom of the air inlet duct 212 and the top of the roof 1 is greater than the distance between the bottom of the snap-fit ​​seat 31 and the top of the roof 1, with a difference of 1-2 cm.

[0061] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A self-regulating heat dissipation photovoltaic tile, characterized in that: The system includes photovoltaic tile modules (2) sequentially laid on the top of the roof (1). The photovoltaic tile modules (2) include a heat dissipation base plate (21) and photovoltaic tile panels (22) fixed to the top of the heat dissipation base plate (21). The bottom of the heat dissipation base plate (21) is connected to the top of the roof (1) by a fastening assembly (3). The heat dissipation base plate (21) has a ventilation cavity (211) inside. An air inlet pipe (212) is fixed and connected to the side of the bottom of the heat dissipation base plate (21) away from the ridge. A heat dissipation pipe (213) is fixed and connected to the side of the bottom of the heat dissipation base plate (21) near the ridge. The heat dissipation pipe (213) has a hollow cross-section. The U-shaped structure has the end of the heat dissipation pipe (213) away from the air inlet pipe (212) connected to the air inlet pipe (212) at the bottom of the adjacent heat dissipation base plate (21). A vertical pipe (4) is fixed on one side of the roof (1). A heat-collecting cover (5) is fixed to the top of the vertical pipe (4) through a support plate. A horizontal pipe (6) located at the top of the ridge is fixed and connected to one side of the vertical pipe (4). A ridge tile (61) is installed on the horizontal pipe (6). Side air pipes (62) are fixed and connected to both sides of the horizontal pipe (6). The lower end of the side air pipe (62) is connected to the heat dissipation pipe (213) near the ridge tile (61). Both the air inlet pipe (212) and the side air pipe (62) are equipped with an interception component (7) to prevent crawling insects from entering the ventilation cavity (211). The interception component (7) includes an upper V-shaped metal plate (71) hinged to the inner wall of the air inlet pipe (212) or the side air pipe (62) and a lower V-shaped metal plate (72) fixed to the bottom of the upper V-shaped metal plate (71). The side of the upper V-shaped metal plate (71) away from its hinge axis abuts against the inner wall of the air inlet pipe (212) or the side air pipe (62). The thermal expansion performance of the lower V-shaped metal plate (72) is greater than that of the upper V-shaped metal plate (71). Auxiliary drainage columns (10) are fixed at the bottom of the heat dissipation pipe (213) and at the bottom of the heat dissipation base plate (21) away from the roof ridge. The auxiliary drainage column (10) has an upper hole (101), a middle hole (102) and a lower hole (103) arranged sequentially from top to bottom. The upper hole (101) is connected to the bottom of the heat dissipation pipe (213) or the bottom of the heat dissipation base plate (21), and the lower hole (103) is connected to the lower end of the auxiliary drainage column (10). The inner diameter of the middle part of the central hole (102) is larger than the inner diameters of its two ends. A float (1021) is provided inside the central hole (102). The outer diameter of the float (1021) is larger than the inner diameter of the upper hole (101) and the inner diameter of the lower hole (103).

2. The self-regulating heat dissipation photovoltaic tile according to claim 1, characterized in that: A negative pressure fan (41) is fixed inside the vertical pipe (4) near its upper end. A solenoid valve (42) located below the horizontal pipe (6) and controlling the opening and closing of the vertical pipe (4) is installed on the vertical pipe (4).

3. The self-regulating heat dissipation photovoltaic tile according to claim 1, characterized in that: The ventilation cavity (211) has heat dissipation fins (214) attached and fixed to the top wall, and the photovoltaic tile assembly (2) also includes a transparent protective plate (23) fixed to the top of the photovoltaic tile (22).

4. The self-regulating heat dissipation photovoltaic tile according to claim 3, characterized in that: The heat dissipation pipe (213) is provided with a drain pipe (8) that connects the top of the heat dissipation pipe (213) to the bottom of the heat dissipation pipe (213). There are multiple drain pipes (8) and they are arranged in a straight line along the roof ridge. A sealing strip (9) with an L-shaped cross section is provided between the photovoltaic tile module (2) and the side wall of the side air duct (62).

5. The self-regulating heat dissipation photovoltaic tile according to claim 1, characterized in that: The cross-section of the photovoltaic tile module (2) is wavy, and the auxiliary drainage column (10) at the bottom of the heat dissipation base plate (21) is located in the trough section of the heat dissipation base plate (21).

6. The self-regulating heat dissipation photovoltaic tile according to claim 1, characterized in that: The fastening assembly (3) includes a snap-fit ​​seat (31) fixed to the bottom of the heat dissipation base plate (21) and an installation plate (32) fixed to the top of the roof (1). The installation plate (32) has snap-fit ​​grooves (321) on both sides. The snap-fit ​​seat (31) has a snap-fit ​​part (311) on both sides that engages with the snap-fit ​​groove (321). The cross-section of the snap-fit ​​part (311) is an inverted right trapezoid.

7. A self-regulating heat dissipation photovoltaic tile according to claim 6, characterized in that: The distance between the bottom of the air inlet pipe (212) and the top of the roof (1) is greater than the distance between the bottom of the snap-fit ​​seat (31) and the top of the roof (1), with a difference of 1-2 cm.

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