A building integrated photovoltaic module structure and construction method

Abstract

The present invention belongs to the field of photovoltaic technology, and discloses an integrated photovoltaic module building structure and a construction method. The structure includes a building main body and a photovoltaic module arranged on the building main body. The photovoltaic module includes a frame and a photovoltaic panel arranged on the frame. The structure further includes a first fan blade arranged on the outer edge circumference of a rotating shaft. Both ends of the rotating shaft are rotatably connected to the frame. The first fan blade forms an angle inclined downward with the axis line of the rotating shaft, so that the wind blowing head-on to the first fan blade is inclined downward after passing through the outer edge of the first fan blade. The structure further includes a second fan blade arranged on the outer edge circumference of the rotating shaft. Both ends of the rotating shaft are rotatably connected to the frame. The second fan blade forms an angle inclined upward with the axis line of the rotating shaft, so that the wind blowing head-on to the second fan blade is inclined upward after passing through the outer edge of the second fan blade. In this solution, the first fan blade is used to guide the wind force to generate a downward-inclined air flow, avoiding the problem that the photovoltaic panel is blown down due to the accumulation of wind force at the angle between the frame and the photovoltaic panel.

Description

Technical Field

[0001] This solution belongs to the field of photovoltaic technology, and specifically relates to an integrated photovoltaic module building structure and construction method. Background Art

[0002] Making full use of solar power generation in buildings to reduce building energy consumption is a way of building energy conservation. Referring to the document with the patent publication (announcement) number JP2016077119A, a building method of a photovoltaic power generation device, a photovoltaic power generation device, a structural method for a frame for placing a photovoltaic panel, and a frame for placing a photovoltaic panel are disclosed. By using a panel mounting platform composed of scaffold steel pipes, and combining connecting members and fixing members to form a strong structure, and then injecting a specific concrete material to enhance the stability of the base members, a windproof method is provided. However, due to the firmness of the structure, the installation process may be relatively complex and require more construction techniques and labor, which not only increases the construction difficulty but also may lead to an extended installation period. Secondly, once the concrete solidifies, the entire structure becomes very heavy, which not only has high requirements for the foundation bearing capacity but also limits the flexibility of the device.

[0003] Referring to the document with the patent publication (announcement) number CN106452304A, a photovoltaic panel applied to a building roof is disclosed, which includes a mounting bracket fixed to the building roof, an inclined solar cell panel fixed on the mounting bracket, the front side edge of the solar cell panel is lower than the rear side edge of the solar cell panel, a deflector is fixed on the mounting bracket below the rear side edge of the solar cell panel, a mounting seat is fixed on the mounting bracket below the deflector, a transverse support shaft is fixed on the mounting seat, and an impeller is hinged on the support shaft through a bearing. The impeller is composed of a shaft sleeve and a plurality of inclined blades, and the blades are uniformly distributed in a ring around the central axis of the shaft sleeve on the outer wall of the shaft sleeve.

[0004] The above device uses an impeller structure and a wind deflector to divert the wind blowing towards the back of the photovoltaic panel, reducing the influence of the wind on the photovoltaic panel. However, since an angle is formed between the C-shaped channel steel 15 and the rear support rod 14 ( Figure 1At point A in the figure). Due to the existence of the included angle, when the wind acts on the included angle, local air flow acceleration is likely to occur. According to Bernoulli's principle, this acceleration will cause the air pressure in this area to decrease, forming a pressure difference with the relatively higher air pressure outside the included angle, thus generating an upward lifting force on the photovoltaic panel. When the lifting force acts on the end of the C-channel steel 15, it is easy to cause the photovoltaic panel to be lifted. At the same time, the air flow at the included angle may form eddies, and the rotational force brought by these eddies will further increase the vibration of the photovoltaic panel, and may even cause a resonance phenomenon, amplifying the destructive effect of the wind. Therefore, the above device is difficult to prevent the photovoltaic panel from being blown down by strong winds. However, during the construction process of the photovoltaic panel, the existence of the included angle formed between the C-channel steel 15 and the rear support rod 14 is for the consideration of installation convenience. If this included angle is omitted, the operation range of the construction personnel is limited, which is likely to lead to a decrease in installation efficiency and an increase in construction difficulty. Summary of the Invention

[0005] The purpose of this solution is to provide an integrated structure of photovoltaic components and buildings to solve the problem that photovoltaic panels are easily blown down in the prior art.

[0006] To achieve the above purpose, this solution provides an integrated structure of photovoltaic components and buildings, including a building main body and a photovoltaic component arranged on the building main body. The photovoltaic component includes a frame and a photovoltaic panel arranged on the frame. The photovoltaic panel is inclined. The photovoltaic component further includes:

[0007] A first fan blade, which is arranged on the outer circumference of the rotating shaft, and both ends of the rotating shaft are rotatably connected to the frame.

[0008] The principle of this solution is as follows: When the wind acts on the back of the photovoltaic panel, when the wind passes through the first fan blade, its flow path is guided by the shape of the fan blade. According to Bernoulli's principle, where the wind speed increases, its static pressure will decrease; conversely, where the flow speed decreases, the static pressure will increase. The curved surface design of the first fan blade causes the flow speed of the wind to change when it contacts the fan blade. Especially when the wind passes through the convex surface of the fan blade (usually the side facing the wind), the streamline is forced to bend, resulting in an increase in the flow speed near the convex surface. According to Bernoulli's principle, the static pressure here decreases. At the same time, the flow speed of the wind on the concave surface (the leeward side) of the fan blade is relatively low, and the static pressure is relatively high. This static pressure difference causes a downward component force to be generated when the wind passes through the fan blade, making the wind flow show a downward inclined trend when leaving the fan blade. Specifically, through the inclination angle of the first fan blade, after the wind passes through the first fan blade, due to the uneven distribution of the flow speed and the action of the static pressure difference, the wind flow is naturally guided into a downward inclined direction, thereby reducing the accumulation of wind force at the included angle between the photovoltaic panel and the frame, reducing the risk of the photovoltaic panel being blown down by strong winds, and achieving the purpose of improving the wind resistance performance of the integrated structure of photovoltaic components and buildings.

[0009] The effects of this solution are as follows: (1) By guiding the wind obliquely downward with the first fan blade, the direct impact of the wind on the photovoltaic panel is reduced, thereby decreasing the lift force generated due to the accumulation of wind at the angle between the frame and the photovoltaic panel. At the same time, the first fan blade can reduce the eddy currents formed in the angle area and avoid the vibration of the photovoltaic panel. (2) The obliquely downward wind applies a downward component force perpendicular to the ground to the frame. This component force increases the pressure between the contact surface of the frame and the ground, helping to avoid resisting the vibration of the frame caused by the wind.

[0010] Furthermore, it further includes a second fan blade. The second fan blade is arranged on the outer circumference of the rotating shaft, and both ends of the rotating shaft are rotatably connected to the frame.

[0011] The principle and effects of this solution are as follows: After the wind passes through the first fan blade and is guided obliquely downward by the first fan blade, the second fan blade adjusts this part of the wind again, prompting the wind flow to be discharged along the open edge of the frame, avoiding the formation of vortices of the wind inside the frame, reducing the direct impact of the wind on the connection between the photovoltaic panel and the frame, and also reducing the vibration and noise generated due to the accumulation of wind.

[0012] Furthermore, the number of the first fan blades and the second fan blades is multiple groups.

[0013] The principle and effects of this solution are as follows: It further improves the effect of guiding the wind and at the same time avoids the wind carrying garbage into the frame.

[0014] Furthermore, it further includes a cleaning component. The cleaning component includes a cam and a water pump that cooperates with the cam. The cam is coaxially connected to the first fan blade. The water inlet end of the water pump is connected to a water tank, the water outlet end of the water pump is connected to a storage water tank, the storage water tank is connected to a water outlet pipe, and the storage water tank is arranged above the highest side of the photovoltaic panel through a bracket.

[0015] The principle and effects of this solution are as follows: (1) When the first fan blade rotates, it drives the cam to rotate, so that the cam intermittently impacts the water pump, causing the water pump to pump the water in the water tank into the storage water tank, and then flow out through the water outlet pipe to the highest side of the photovoltaic panel, thereby cleaning the dust on the photovoltaic panel. (2) When the wind acts on the photovoltaic panel, especially in the case of strong wind, the wind is likely to carry dust or other tiny garbage, and these substances are more likely to accumulate on the photovoltaic panel, affecting the photoelectric conversion efficiency. Therefore, when there is wind, the water in the water tank is pumped into the storage water tank to clean the photovoltaic panel. (3) Compared with using an electric water pump to pump water in the prior art, this solution uses wind as the power source to pump water, can operate without an external power source, reduces energy consumption, and also reduces costs.

[0016] Furthermore, the water inlet pipe of the water tank is arranged at the top of the side wall of the water tank, and the water outlet pipe of the water tank is arranged at the bottom of the side wall of the water tank; the water outlet pipe is connected to the third fan blade, the third fan blade is provided with a passage, the passage is connected with the water outlet pipe, a slider is slidably provided in the third fan blade, the slider is provided with a through hole, the through hole cooperates with the water outlet end of the water outlet pipe, and the slider is connected to a spring for resetting it.

[0017] The principle and effect of this scheme are as follows: (1) When there is wind, the wind force drives the third blade to rotate, and the slider moves under the action of centrifugal force, so that the through hole and the water outlet end of the water outlet pipe are offset, thereby closing the water outlet end of the water outlet pipe and preventing the water in the water tank from flowing out. On the contrary, when the wind stops, the third blade stops rotating, the slider is reset under the drive of the spring, the through hole is connected to the water outlet end of the water outlet pipe, and the water in the water tank flows out. (2) Through the above arrangement, when there is wind, the water outlet pipe is blocked, avoiding cleaning when there is wind, because at this time the wind may quickly blow the dust back and cover the photovoltaic panel, resulting in poor cleaning effect and waste of water resources. When the wind stops, the water outlet pipe is not blocked, and the dust on the photovoltaic panel is deposited due to gravity, so it can be cleaned more thoroughly and effectively. (3) The water inlet pipe is arranged at the top of the water tank, and the water outlet pipe is arranged at the bottom of the water tank. The advantage of this arrangement is that it avoids the use of a one-way valve. At the same time, when the water in the water storage tank is full, the water will flow back into the water tank, so that the amount of water used for cleaning the photovoltaic panels each time is constant, avoiding the waste of water resources.

[0018] Furthermore, the third fan blade is provided with a slide groove, and the sliding block is slidably connected to the slide groove.

[0019] The principle and effect of this solution is that the slide groove provides positioning and guiding functions for the movement of the slider.

[0020] 1. A photovoltaic module building integrated structure construction method, comprising applying a photovoltaic module building integrated structure as described above, comprising the following steps:

[0021] Step S10: constructing a main building, reserving space for installing a rack on the top of the main building, and obliquely installing a glass skylight on the top of the main building;

[0022] Step S20: Detecting information about the top construction area, as well as information about the illumination angle and the illumination intensity at each illumination angle;

[0023] Step S30: determining the installation area of ​​the photovoltaic panel according to the construction area information, and determining the installation angle of the photovoltaic panel according to the detected light angle and light intensity information;

[0024] Step S40: Install a rack on the top of the building main body according to the installation angle of the photovoltaic panel, then install the photovoltaic panels to be installed on the rack in sequence, and extend the photovoltaic panels on the highest side and the lowest side to the extension edge outside the wall of the building main body;

[0025] Step S50: Install the first fan blade and the second fan blade on the rack, coaxially install a cam on the rotating shaft of the first fan blade, and install a water pump at a position where the cam can touch;

[0026] Step S60: Install a bracket on the top of the building main body, install and fix the water storage tank on the bracket, and make the water outlet pipe located above the highest side of the photovoltaic panel;

[0027] Step S70: Install a third fan blade at the outlet end of the water outlet pipe, and sequentially connect the pipelines between the water tank and the water pump, and between the water pump and the water storage tank. Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of the prior art;

[0029] Figure 2 is a schematic structural diagram of the integrated structure of the photovoltaic module and the building of the present invention;

[0030] Figure 3 is a schematic structural diagram of the photovoltaic module and the cleaning module of the present invention;

[0031] Figure 4 is a schematic diagram of the structure of the photovoltaic module of the present invention Figure 1 ;

[0032] Figure 5 is a schematic diagram of the structure of the photovoltaic module of the present invention Figure 2 ;

[0033] Figure 6 is a schematic structural diagram of the water storage tank, the water outlet pipe and the third fan blade of the present invention;

[0034] Figure 7 is an internal cross-sectional view of the third fan blade of the present invention.

[0035] The reference numerals in the drawings of the specification include: building main body 1, photovoltaic module 2, rack 21, photovoltaic panel 22, first fan blade 23, second fan blade 24, cleaning module 3, cam 3, water pump 32, water storage tank 33, water outlet pipe 34, bracket 35, water inlet pipe 36, third fan blade 37, passage 371, slider 38, through hole 381. Detailed Embodiments

[0036] The following will clearly and completely describe the concept of the present invention and the technical effects produced in combination with the embodiments, so as to fully understand the purpose, features and effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, other embodiments obtained by those skilled in the art without creative work all fall within the scope of protection of the present invention:

[0037] Embodiment:

[0038] Please refer to Figure 2 , an integrated photovoltaic module building structure, including a building main body 1, specifically a house. An inclined glass skylight is installed on the building main body. Above the skylight and at the top of the building main body 1, a photovoltaic module 2 is installed. The photovoltaic module 2 includes a frame 21 and a plurality of photovoltaic panels 22 installed on the frame 21. The photovoltaic panels 22 are integrally inclined. The frame 21 is fixedly installed on the top of the building main body 1, and the photovoltaic module 2 and the building main body 1 form an integrated building structure.

[0039] Please refer to Figure 3 and Figure 4 , the photovoltaic module 2 further includes a plurality of groups of first fan blades 23. The first fan blades 23 are arranged at the left end of the frame 21. The first fan blades 23 are arranged on the outer circumference of a rotating shaft. The upper and lower ends of the rotating shaft are respectively rotationally connected to the frame 21 through bearings. The first fan blades 23 form an inclined downward angle (for example, -30 degrees) with the axis of the rotating shaft, so that the wind blowing towards the first fan blades 23 obliquely downward after passing through the outer edge of the first fan blades 23. When the wind force acts on the back of the photovoltaic panel 22, the wind force is guided by the first fan blades 23 to generate an obliquely downward air flow, reducing the direct impact of the wind on the photovoltaic panel 22, thereby reducing the lift force generated by the accumulation of wind force at the angle between the frame 21 and the photovoltaic panel 22. At the same time, the first fan blades 23 can reduce the eddy current formed in the angle area and avoid the vibration of the photovoltaic panel 22.

[0040] The photovoltaic module 2 further includes multiple groups of second fan blades 24. The second fan blades 24 are arranged at the right end of the frame 21. The second fan blades 24 are arranged on the outer circumference of the rotating shaft. Both the upper and lower ends of the rotating shaft are rotatably connected to the frame 21 through bearings. The second fan blades 24 form an upward-inclined angle with the axis line of the rotating shaft, so that the wind blowing head-on to the second fan blades 24 is inclined upward after passing through the outer edge of the second fan blades 24. The second fan blades 24 form an upward-inclined angle (such as +30 degrees) with the axis line of the rotating shaft. When the wind is guided to be inclined downward after passing through the first fan blades 23, the second fan blades 24 further correct the wind direction to make it return to a state close to horizontal, prompting the air flow to be discharged along the open edge of the frame 21, avoiding the formation of vortices of wind force inside the frame 21, reducing the direct impact of wind force on the connection between the photovoltaic panel 22 and the frame 21, and at the same time reducing the vibration and noise generated by the accumulation of wind force. It should be noted that multiple groups are densely arranged on the same axis of the blades of the first fan blades 23 and the second fan blades 24 to prevent wind from carrying garbage into the frame 21.

[0041] Please refer to 3- Figure 6 It further includes a cleaning component 3. The cleaning component 3 includes a cam 31 and a water pump 32 that cooperates with the cam 31. The cam 31 is coaxially connected to the first fan blade 23. The water inlet end of the water pump 32 is connected to a water tank. The water tank is arranged inside the building main body 1 (not shown in the figure). The water outlet end of the water pump 32 is connected to a water storage tank 33. The water storage tank 33 is connected to a water outlet pipe 34. The water storage tank 33 is arranged above the highest side of the photovoltaic panel 22 through a bracket 35. It should be noted that the water pump 32 is a manual suction water pump. When the first fan blade 23 rotates, it drives the cam 31 to rotate, so that the cam 31 intermittently impacts the water pump 32, causing the water pump 32 to pump the water in the water tank into the water storage tank 33, and then flowing out through the water outlet pipe 34 to the highest side of the photovoltaic panel 22, thereby cleaning the dust on the photovoltaic panel.

[0042] The water inlet pipe 36 of the water tank 33 is arranged at the top of the side wall of the water tank 33, and the water outlet pipe 34 of the water tank 33 is arranged at the bottom of the side wall of the water tank 33; the water outlet pipe 34 is connected to the third fan blade 37, and the third fan blade 37 is provided with a passage 371, and the passage 371 is communicated with the water outlet pipe 34. A slider 38 is provided in the third fan blade 37, and the third fan blade 37 is provided with a slide groove, and the slider is slidably connected to the slide groove. The slider 38 is provided with a through hole 381, and the through hole 381 cooperates with the water outlet end of the water outlet pipe 34, and the slider 38 is symmetrically connected with a spring, and the free end of the spring is fixedly connected to the inner wall of the slide groove. When there is wind, the wind force drives the third blade 37 to rotate, and the slider 38 is moved by the centrifugal force, so that the through hole 381 is staggered with the water outlet end of the water outlet pipe 34, thereby closing the water outlet end of the water outlet pipe 34, cutting off the path between the water outlet pipe 34 and the corridor 371, and preventing the water in the water storage tank 33 from flowing out. On the contrary, when the wind stops, the third blade 37 stops rotating, the slider 38 is reset under the drive of the spring, the through hole 381 is connected with the water outlet end of the water outlet pipe 34, and the water in the water storage tank flows out. When there is wind, the water outlet pipe 34 is blocked, avoiding cleaning when there is wind, because at this time the wind may quickly blow the dust back and cover the photovoltaic panel 22, resulting in poor cleaning effect, and also causing waste of water resources. When the wind stops, the water outlet pipe 34 is not blocked, and the dust on the photovoltaic panel 22 is deposited due to gravity, so it can be cleaned more thoroughly and effectively.

[0043] 1. To realize the above-mentioned building integrated structure, the present invention also provides a photovoltaic module building integrated structure construction method, including applying the above-mentioned photovoltaic module building integrated structure, including the following steps:

[0044] Step S10: construct the building body 1, reserve space for installing the rack 21 on the top of the building body 1, and install the glass skylight obliquely on the top of the building body 21;

[0045] Step S20: Detecting information about the top construction area, as well as information about the illumination angle and the illumination intensity at each illumination angle;

[0046] Step S30: determining the installation area of ​​the photovoltaic panel 22 according to the construction area information, and determining the installation angle of the photovoltaic panel 22 according to the detected light angle and light intensity information;

[0047] Step S40: According to the installation angle of the photovoltaic panel 22, the rack 21 is installed on the top of the building body 1, and then the photovoltaic panels 22 to be installed are installed on the rack 21 in sequence, and the photovoltaic panels on the highest side and the lowest side are extended to the extended edge outside the wall of the building body 1;

[0048] Step S50: Install the first blade 23 and the second blade 24 on the frame 21, coaxially install the cam 31 on the rotating shaft of the first blade 23, and install the water pump 32 at a position where the cam 31 can touch it;

[0049] Step S60: Install the bracket 35 on the top of the building body 1, install and fix the water storage tank 33 on the bracket 35, and make the water outlet pipe 34 located above the highest side of the photovoltaic panel 22;

[0050] Step S70: Install the third blade 37 at the outlet end of the water outlet pipe 34, and successively connect the pipes between the water tank and the water pump 32, and between the water pump 32 and the water storage tank 33.

[0051] The above are only the embodiments of the present invention, and common knowledge such as the specific structures and characteristics known in the solutions is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A photovoltaic module building integrated structure, comprising a building body (1) and a photovoltaic module (2) arranged on the building body (1), the photovoltaic module (2) comprising a frame (21) and a photovoltaic panel (22) arranged on the frame (21), the frame (21) being arranged below the photovoltaic panel (22), the photovoltaic panel (22) being arranged at an angle, and characterized in that: The photovoltaic module (2) further comprises: A first fan blade (23), wherein the first fan blade (23) is arranged on the outer periphery of the rotating shaft, and the upper and lower ends of the rotating shaft are respectively rotatably connected to the frame (21) through bearings; the first fan blade (23) is arranged at the left end of the frame (21), and the first fan blade (23) forms an angle inclined downward with the axis of the rotating shaft; the first fan blade (23) is a curved surface design, the first fan blade (23) has an inclined angle, and when wind force acts on the back of the photovoltaic panel (22), the side of the first fan blade (23) facing the wind is a convex surface, and the leeward side is a concave surface; when wind force acts on the back of the photovoltaic panel (22), the wind force is guided by the first fan blade (23) to generate an oblique downward airflow; A second fan blade (24), wherein the second fan blade (24) is arranged on the outer periphery of the rotating shaft, the second fan blade (24) is arranged at the right end of the frame (21), the upper and lower ends of the rotating shaft of the second fan blade (24) are rotatably connected to the frame (21) via bearings, and the second fan blade (24) and the axis of the rotating shaft form an angle inclined upward, so that the wind blowing toward the second fan blade (24) passes through the outer edge of the second fan blade (24) and then inclines upward; when the wind force passes through the first fan blade (23) and is guided obliquely downward, the second fan blade (24) further corrects the wind direction to restore it to a state close to horizontal, thereby causing the wind flow to be discharged along the open edge of the frame (21).

2. A photovoltaic module building integrated structure according to claim 1, characterized in that: The first fan blades (23) and the second fan blades (24) are provided in multiple groups.

3. A photovoltaic module building integrated structure according to claim 1, characterized in that: The cleaning assembly (3) further comprises a cleaning assembly (3), the cleaning assembly (3) comprising a cam (31) and a water pump (32) matched with the cam (31), the cam (31) being coaxially connected to the first fan blade (23), the water inlet end of the water pump (32) being connected to a water tank, the water outlet end of the water pump (32) being connected to a water storage tank (33), the water storage tank (33) being connected to a water outlet pipe (34), and the water storage tank (33) being arranged above the highest side of the photovoltaic panel (22) via a bracket (35).

4. A photovoltaic module building integrated structure according to claim 3, characterized in that: The water inlet pipe (36) of the water storage tank (33) is arranged at the top of the side wall of the water storage tank (33), and the water outlet pipe (34) of the water storage tank (33) is arranged at the bottom of the side wall of the water storage tank (33); the water outlet pipe (34) is connected to the third fan blade (37), the third fan blade (37) is provided with a passage (371), the passage (371) is communicated with the water outlet pipe (34), a slider (38) is slidably provided in the third fan blade (37), the slider (38) is provided with a through hole (381), the through hole (381) and the water outlet end of the water outlet pipe (34) cooperate with each other, and the slider (38) is connected to a spring for returning the slider (38) to its original position.

5. A photovoltaic module building integrated structure according to claim 4, characterized in that: The third fan blade (37) is provided with a sliding groove, and the sliding block (38) is slidably connected to the sliding groove.

6. A method for constructing a photovoltaic module building integrated structure, comprising applying a photovoltaic module building integrated structure as claimed in any one of claims 1 to 5, characterized in that: The steps include: Step S10: constructing the building main body (1), reserving a space for installing the rack (21) on the top of the building main body (1), and obliquely installing a glass skylight on the top of the building main body (1); Step S20: Detecting information about the top construction area, as well as information about the illumination angle and the illumination intensity at each illumination angle; Step S30: determining the installation area of ​​the photovoltaic panel (22) according to the construction area information, and determining the installation angle of the photovoltaic panel (22) according to the detected light angle and light intensity information; Step S40: installing a rack (21) on the top of the building body (1) according to the installation angle of the photovoltaic panel (22), and then installing the photovoltaic panels (22) to be installed on the rack (21) in sequence, and extending the photovoltaic panels on the highest side and the lowest side to the extended edge outside the wall of the building body (1); Step S50: installing a first fan blade (23) and a second fan blade (24) on the frame (21), installing a cam (31) coaxially on the rotating shaft of the first fan blade (23), and installing a water pump (32) at a position that can be touched by the cam (31); Step S60: installing a bracket (35) on the top of the building body (1), installing and fixing the water storage tank (33) on the bracket (35), and making the water outlet pipe (34) be located above the highest side of the photovoltaic panel (22); Step S70: Install the third fan blade (37) at the outlet end of the water outlet pipe (34), and sequentially connect the pipes between the water tank and the water pump (32), and between the water pump (32) and the water storage tank (33).

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