Water cooling system for photovoltaic inverter

Abstract

The utility model discloses a water cooling system for a photovoltaic inverter, and relates to the technical field of photovoltaic inverters, a supporting assembly is used for supporting a sunshade and a cooling water pipe, the sunshade is located above the inverter, and the projection of the inverter on the horizontal plane is located within the range of the projection of the sunshade on the horizontal plane to form complete shielding. The water spraying head is arranged at the end part of the cooling water pipe, water flows from the cooling water pipe and flows out from the water spraying head, water is sprayed to the upper surface of the sunshade to realize cooling, the surrounding environment of the inverter is cooled, and cooling water falling from the sunshade is collected by the water collecting disc; the sunshade can prevent the inverter from being directly irradiated by sunlight, the temperature of the environment around the inverter is reduced by spraying water to the sunshade, the adverse effect of high temperature in summer on normal operation of the photovoltaic inverter is reduced, and water is shielded by the sunshade and cannot be directly sprayed on the inverter.

Description

TECHNICAL FIELD

[0001] The utility model relates to photovoltaic inverter technical field, concretely relates to a photovoltaic inverter water cooling system. BACKGROUND

[0002] With global warming, extreme weather appears more and more frequently, especially the frequency of extremely high temperature weather in summer is more and more, and the cycle is also more and more long, which brings new challenges to the operation of electrical equipment of industrial and commercial distributed photovoltaic projects.

[0003] The components and inverters of basically all industrial and commercial distributed photovoltaic projects are installed on the roof. The roof on which photovoltaics are installed can be divided into two types of color steel tile and concrete, and the color steel tile roof accounts for the vast majority. In the hot noon of July and August in the northern hemisphere summer, the temperature in some areas can reach more than 40℃, and the temperature on the color steel tile roof can reach 50 degrees or more. Such high temperature is extremely unfavorable to the stable operation of photovoltaic inverters on the roof.

[0004] Generally, when the irradiation is good and the inverter over-releases, the power generation of the inverter will be cut off when the ambient temperature is 40℃-45℃, and when the temperature is 45℃-60℃, the higher the inverter temperature, the inverter will appear a large amount of linearly related to the temperature. When the temperature is 60℃, the power of the inverter will decrease by 70%. If it exceeds 60℃, the inverter may not operate normally, affecting the power generation of the photovoltaic system, and high temperature also reduces the performance and life of the internal components of the inverter.

[0005] Most of the photovoltaic inverters on the market now adopt natural ventilation and forced air cooling measures, and set up cooling fans inside the inverter. Such measures are effective for inverter cooling, but due to the high temperature of the roof environment, the cooling capacity of the air cooling is limited, and in actual conditions, the inverter also appears a large amount of de-rating operation under the condition of high ambient temperature.

[0006] For those skilled in the art, how to reduce the adverse effects of high summer temperature on the normal operation of photovoltaic inverters is a technical problem to be solved at present. CONTENT OF THE UTILITY MODEL

[0007] The core of the utility model is to provide a photovoltaic inverter water cooling system, which cools the environment around the inverter by water cooling, reduces the adverse effects of high summer temperature on the normal operation of photovoltaic inverters, and the specific scheme is as follows:

[0008] A photovoltaic inverter water cooling system, comprising a sunshade, a cooling water pipe, a water spray head, a support assembly and a water collecting disc.

[0009] The support assembly is used to support the sunshade and the cooling water pipe, so that the sunshade is above the inverter, and a projection of the inverter on a horizontal plane is within a range of the projection of the sunshade on the horizontal plane.

[0010] The water spraying head is arranged at an end of the cooling water pipe, and is used to spray water to an upper surface of the sunshade to achieve cooling; and the water collecting disc is used to collect water falling from the sunshade.

[0011] Optionally, the sunshade is in the shape of an umbrella with a high middle and low periphery; and the water spraying head is arranged at the highest point of the sunshade.

[0012] The water collecting disc is annular, and can collect water falling from the periphery of the sunshade.

[0013] Optionally, the water collecting disc is fixed to the color steel tile roof by a clamp, and is consistent with the inclination of the color steel tile roof.

[0014] The water collecting disc is connected to the water collecting tank through a water collecting pipe to store the collected water.

[0015] Optionally, the inside of the water collecting tank is divided into an upper chamber and a lower chamber; the water collecting pipe is used to deliver the high-temperature water after heat absorption to the upper chamber; the high-temperature water in the upper chamber is cooled and then sent to the lower chamber through an upper-lower through pipe; and an upper-lower electromagnetic gate valve is arranged on the upper-lower through pipe to control the opening and closing.

[0016] The lower chamber is delivered to the cooling water pipe through a return pipe.

[0017] A time relay is mounted on the water collecting tank.

[0018] Optionally, the return pipe is connected to a water supply pipe network to directly deliver water from the water supply pipe network to the cooling water pipe.

[0019] And / or, a drain pipe is connected to the return pipe to empty the water in the pipe.

[0020] And / or, an overflow pipe is connected to an upper portion of the upper chamber, and a vent pipe is connected to a lower portion of the lower chamber.

[0021] Optionally, water level sensors are arranged in the upper chamber and the lower chamber, respectively.

[0022] And / or, vacuum breakers are arranged in the water collecting pipe and the return pipe, respectively.

[0023] Optionally, a centrifugal pump, a pressure gauge, a first gate valve, a second gate valve, a first electromagnetic gate valve, a first check valve and a second check valve are arranged on the return pipe.

[0024] A water supply electromagnetic gate valve, a water supply check valve and a water meter are arranged on the water supply pipe network.

[0025] A drain ball valve is installed on the drain pipe;

[0026] A venting ball valve is installed on the venting pipe;

[0027] A cooling electromagnetic gate valve is installed on the cooling water pipe.

[0028] Optionally, the return pipe is used to supply water to two or more of the cooling water pipes;

[0029] Alternatively, the return pipe can supply water to the photovoltaic cleaning system via a cleaning water pipe.

[0030] Optionally, a temperature sensor for monitoring temperature is placed near the inverter, and the controller controls the amount of water sprayed from the spray head based on the temperature sensor's detection value.

[0031] Optionally, the support assembly includes a plurality of vertical support rods, horizontal support rods, and diagonal support rods. The vertical support rods and the horizontal support rods are intersected and fixed to each other to form a frame, and the diagonal support rods are used to provide diagonal support to the frame.

[0032] This invention provides a water-cooling system for a photovoltaic inverter. A support assembly supports a sunshade and cooling water pipes. The sunshade is positioned above the inverter, with the inverter's horizontal projection falling within the sunshade's horizontal projection range, creating complete shading. Spray nozzles are located at the ends of the cooling water pipes, allowing water to flow from the pipes and exit through the nozzles, spraying water onto the upper surface of the sunshade for cooling. This process also cools the environment surrounding the inverter. Cooling water falling from the sunshade is collected in a collection tray. The sunshade prevents the inverter from being directly exposed to sunlight. By spraying water onto the sunshade, the ambient temperature around the inverter is lowered, reducing the adverse effects of high summer temperatures on the normal operation of the photovoltaic inverter. The water is blocked by the sunshade and does not directly drip onto the inverter. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a front view of the water-cooled cooling system for the photovoltaic inverter of this utility model;

[0035] Figure 2 This is a side view of the water-cooled cooling system for the photovoltaic inverter of this utility model;

[0036] Figure 3 It is the overhead view of the photovoltaic inverter water cooling system of the utility model;

[0037] Figure 4 It is the schematic diagram of pipeline of the photovoltaic inverter water cooling system of the utility model;

[0038] Figure 5 It is the control logic diagram of the photovoltaic inverter water cooling system of the utility model;

[0039] Figure 6 It is the control system diagram of the photovoltaic inverter water cooling system of the utility model.

[0040] The figure includes:

[0041] Inverter 001, color steel tile roof 002;

[0042] Sunshade 101, cooling water pipe 102, cooling electromagnetic gate valve 1021, water spraying head 103, support assembly 104, vertical support rod 1041, horizontal support rod 1042, oblique support rod 1043, water collecting disc 105, clamp 1051;

[0043] Water collecting pipe 201, water collecting tank 202, upper chamber 2021, lower chamber 2022, time relay 2023, upper and lower through pipes 2024, upper and lower electromagnetic gate valves 2025, water level sensor 2026, return pipe 203, centrifugal pump 2031, pressure gauge 2032, first gate valve 2033, second gate valve 2034, first electromagnetic gate valve 2035, first check valve 2036, second check valve 2037, water supply pipe network 204, water supply electromagnetic gate valve 2041, water supply check valve 2042, water meter 2043, drain pipe 205, drain ball valve 2051, overflow pipe 206, vent pipe 207, vent ball valve 2071, cleaning water pipe 208, cleaning gate valve 2081;

[0044] Control circuit 301, data acquisition control assembly 302, intelligent monitoring background assembly 303. DETAILED DESCRIPTION

[0045] In order to make the technical personnel in the art better understand the technical scheme of the utility model, the photovoltaic inverter water cooling system of the utility model will be introduced and explained in detail below in combination with the drawings and specific embodiments.

[0046] In combination with Figure 1 , Figure 2 , Figure 3 As shown in the utility model provides a kind of photovoltaic inverter water cooling system, including sunshade 101, cooling water pipe 102, water spraying head 103, support assembly 104, water collecting disc 105 and the structure of other.

[0047] The support assembly 104 plays a supporting role, and the sunshade 101 and the cooling water pipe 102 are respectively installed on the support assembly 104, so that the sunshade 101 and the cooling water pipe 102 are positioned and fixed by the support assembly 104. The bottom of the support assembly 104 is fixed, and the support assembly 104 is combined with the roof 002 of the color steel tile to form a support assembly 104. Figure 1 、 Figure 2 As shown in the figure, the bottom of the support assembly 104 is fixed on the roof 002 of the color steel tile.

[0048] The support assembly 104 fixes and supports the sunshade 101 above the inverter 001, and there is a certain spacing between the sunshade 101 and the inverter 001. The projection area of the sunshade 101 on the horizontal plane is larger than the projection area of the inverter 001 on the horizontal plane, and the projection of the inverter 001 on the horizontal plane is located within the projection of the sunshade 101 on the horizontal plane. The sunshade 101 completely blocks the inverter 001 from above.

[0049] The water spraying head 103 is arranged at the end of the cooling water pipe 102, the cooling water pipe 102 is used for water flow, and the water spraying head 103 is used for spraying cooling water. The water sprayed from the water spraying head 103 flows to the upper surface of the sunshade 101, and the upper surface of the sunshade 101 is uniformly wetted by water, so as to achieve cooling and temperature reduction. Since the sunshade 101 blocks the inverter 001 below, the heat of sunlight is more concentrated on the sunshade 101. When the water flows over the upper surface of the sunshade 101, the flowing water absorbs the heat of the sunshade 101, so as to achieve the effect of cooling and temperature reduction, so as to reduce the ambient temperature around the inverter 001. The utility model cooperates with the sunshade 101 and the flowing water, and the water does not directly contact the inverter 001, so as to ensure the power supply case. The heat of the sunshade 101 is taken away by the flowing water, so as to cool and reduce the temperature of the ambient environment of the inverter 001. The inverter 001 works at a suitable ambient temperature, so as to avoid the peak cutting of the power generation of the inverter 001.

[0050] The water collecting disc 105 has a groove structure vertically opposite to the edge of the sunshade 101, and the water collecting disc 105 is used for collecting the water falling from the sunshade 101, guiding and converging the falling water, and avoiding the interference of the flowing water to the inverter 001.

[0051] On the basis of the above scheme, the sunshade 101 is an umbrella type with a middle high and four low, the surface of the umbrella type can be a conical surface (for example, a quadrangular pyramid), or can be a curved surface, the water spraying head 103 is arranged at the highest point of the sunshade 101, the water sprayed by the water spraying head 103 first reaches the highest point in the middle of the sunshade 101, and flows to the four directions under the action of gravity, so that the uniform dispersion effect can be formed on the whole sunshade 101, and the water spraying head 103 only needs to spray the cooling water from one point to the outside. The water collecting disc 105 is annular, the middle of the water collecting disc 105 is designed as a hollow, so as to leave a space for the supporting assembly 104, the inner circle diameter of the water collecting disc 105 is less than the diameter of the sunshade 101, the outer circle diameter of the water collecting disc 105 is greater than the diameter of the sunshade 101, and the water collecting disc 105 can collect the water falling from the four directions of the sunshade 101. In this structure, the cooling water pipe 102 is arranged below the sunshade 101, the cooling water pipe 102 is also shielded by the sunshade 101, the water flowing in the cooling water pipe 102 flows from the bottom to the top, and the water spraying head 103 sprays water upwards through the sunshade 101. The connection between the water spraying head 103 and the sunshade 101 needs to be sealed to avoid the water flowing downwards from the joint.

[0052] In addition to the umbrella type structure with a middle high and four low, the sunshade 101 can also be arranged as a structure inclined and lowered from one edge to another edge, that is, the whole sunshade 101 is a slope, so that the structure can also achieve the effect of cooling and lowering. When the sunshade 101 adopts the slope structure, a pipe needs to be arranged along the edge of the high place, and openings are arranged in rows on the pipe, so that the water flows through each position of the slope. Correspondingly, the water collecting disc 105 adopts a rectangular disc and is placed below the lower edge of the sunshade 101. In this structure, the cooling water pipe 102 has a horizontal extension part, and the cooling water pipe 102 does not need to pass through the sunshade 101.

[0053] It should be noted that the water sprayed from the water spraying head 103 can slowly flow to the upper surface of the sunshade 101, or high-pressure water can be sprayed, so as to form water mist dispersion above the sunshade 101, the water mist can cool and lower the surrounding air in a larger range, and has a better space cooling effect. Different spraying effects can be achieved through different structural forms of the water spraying head 103.

[0054] Combining Figure 1 , Figure 2 As shown in the drawings, the water collecting disc 105 is fixed to the color steel tile roof through the clamp 1051, and the water collecting disc 105 and the color steel tile roof 002 are fixed as a whole; the color steel tile roof 002 has a certain inclination, the inclination of the bottom surface of the water collecting disc 105 is consistent with that of the color steel tile roof 002, so that the water collected by the water collecting disc 105 can automatically flow and gather to the low place under the action of gravity, so that the water in the water collecting disc 105 is quickly discharged.

[0055] Combination Figure 4 As shown, the water collection tray 105 is connected to the water collection tank 202 through the water collection pipe 201. The water collection tank 202 stores the water collected by the water collection tray 105. The position of the water collection tank 202 is lower than that of the water collection tray 105. The water in the water collection tray 105 can automatically flow to the water collection tank 202 under the action of gravity. The water collection pipe 201 plays a guiding role for the water.

[0056] In a preferred embodiment of this utility model, the interior of the water collection tank 202 is divided into an upper chamber 2021 and a lower chamber 2022, with the upper chamber 2021 located above and the lower chamber 2022 located below. The upper chamber 2021 and the lower chamber 2022 are separated by a partition that has a heat insulation effect. The upper chamber 2021 and the lower chamber 2022 are two relatively independent cavities. An upper and lower guide pipe 2024 is provided between the upper chamber 2021 and the lower chamber 2022. An upper and lower solenoid gate valve 2025 is provided on the upper and lower guide pipe 2024 to control the opening and closing of the upper and lower guide pipe 2024. When the upper and lower solenoid gate valve 2025 is open, water in the upper chamber 2021 can flow into the lower chamber 2022.

[0057] The water collection tray 105 collects the high-temperature water that has absorbed heat. The water collected in the water collection tray 105 flows into the water collection pipe 201, which is used to transport the heat-absorbing high-temperature water to the upper chamber 2021. The high-temperature water is first stored in the upper chamber 2021 to prevent it from mixing with the cooling water in the lower chamber 2022 and causing it to heat up, thus ensuring that the cooling water remains at a low temperature and ensuring the cooling effect. Under normal circumstances, the temperature is higher at noon, and cooling is achieved by spraying water. The high-temperature water gathers in the upper chamber 2021 and does not mix with the water in the lower chamber 2022 at first. After being cooled down at night, it then flows into the lower chamber 2022 for use as cooling water.

[0058] A return pipe 203 is installed between the lower chamber 2022 and the cooling water pipe 102. The lower chamber 2022 supplies cooling water to the cooling water pipe 102 via the return pipe 203, allowing for the collection and reuse of used cooling water. This reduces water waste and improves the utilization rate of cooling water. Figure 4 As shown, the end of the return pipe 203 is connected to the cooling water pipe 102, and can deliver the recovered cooling water to the cooling water pipe 102.

[0059] A time relay 2023 is installed on the water collection tank 202. The time relay 2023 is used for timing, starting from the system start cooling timer, to control the water supply period.

[0060] Combination Figure 4As shown, the return pipe 203 is connected to the water supply pipe network 204, which is used to directly supply water to the cooling water pipe 102, and the water supplied by the water supply pipe network 204 flows to the sunshade 101 through the cooling water pipe 102, so as to provide cooling water for cooling when the water amount in the water collecting tank 202 is insufficient. For example, in the initial stage of use, there is no water in the entire pipeline system, and then the water is first transported from the water supply pipe network 204 to the cooling water pipe 102 through the return pipe 203, and flows to the upper surface of the sunshade 101 for cooling, and when the collected water amount is sufficient, the collected water in the water collecting tank 202 can be used for cooling.

[0061] In combination Figure 4 As shown, the return pipe 203 is connected to the water supply pipe network 204, which is used to directly supply water to the cooling water pipe 102, and the water supplied by the water supply pipe network 204 flows to the sunshade 101 through the cooling water pipe 102, so as to provide cooling water for cooling when the water amount in the water collecting tank 202 is insufficient. For example, in the initial stage of use, there is no water in the entire pipeline system, and then the water is first transported from the water supply pipe network 204 to the cooling water pipe 102 through the return pipe 203, and flows to the upper surface of the sunshade 101 for cooling, and when the collected water amount is sufficient, the collected water in the water collecting tank 202 can be used for cooling.

[0062] In combination Figure 4 As shown, the upper part of the upper chamber 2021 is connected to the overflow pipe 206, and when the water in the upper chamber 2021 reaches a certain height, the water needs to be overflowed and discharged in order to avoid the upper chamber 2021 being filled. The connection point of the overflow pipe 206 is located at the upper position of the upper chamber 2021, and when the water reaches the position of the overflow pipe 206, the water is automatically discharged outward. The lower part of the lower chamber 2022 is connected to the emptying pipe 207, and when the lower chamber 2022 needs to be emptied, the water in the lower chamber 2022 is discharged outward through the emptying pipe 207.

[0063] The upper chamber 2021 and the lower chamber 2022 are respectively provided with water level sensors 2026, and the two water level sensors 2026 are respectively used for detecting the water level height of the upper chamber 2021 and the lower chamber 2022. The water collecting pipe 201 and the return pipe 203 are respectively provided with vacuum breakers, and the vacuum breakers are located at the high point turning positions of the pipes, and can discharge the air in the pipes.

[0064] In combination Figure 4 As shown, the return pipe 203 of the utility model is provided with a centrifugal pump 2031, a pressure gauge 2032, a first gate valve 2033, a second gate valve 2034, a first electromagnetic gate valve 2035, a first check valve 2036, a second check valve 2037; the water supply pipe network 204 is provided with a water supply electromagnetic gate valve 2041, a water supply check valve 2042, and a water meter 2043; the drain pipe 205 is provided with a drain ball valve 2051; the emptying pipe 207 is provided with an emptying ball valve 2071; and the cooling water pipe 102 is provided with a cooling electromagnetic gate valve 1021. In use, the corresponding valves are respectively opened or closed to realize corresponding water supply forms.

[0065] If the lower chamber 2022 has water, the first electromagnetic gate valve 2035 is opened first, and if the lower chamber 2022 of the water collecting tank has no water, the water supply electromagnetic gate valve 2041 is opened first. The first gate valve 2033 and the second gate valve 2034 are normally open valves, and the centrifugal pump 2031, the pressure gauge 2032, and the second check valve 2037 are arranged between the first gate valve 2033 and the second gate valve 2034. When the centrifugal pump 2031 is overhauled, the first gate valve 2033 and the second gate valve 2034 are closed to facilitate the overhaul of the centrifugal pump 2031.

[0066] The cooling electromagnetic gate valve 1021 is opened to supply water to the water spray head 103, thereby starting the water spray cooling. The water meter 2043 is used for metering the water consumption. The water supply check valve 2042 and the first check valve 2036 are used to prevent the backflow of water supply in the water supply network 204. The centrifugal pump 2031 is used to increase the water pressure of the water supply system. The centrifugal pump is configured to have an adjustable lift, and the flow and lift parameters of the pump can be adjusted as needed to facilitate the control of the water spray pressure by the water spray cooling system to collect the cooling water. The centrifugal pump 2031 is correspondingly provided with a joint. The pressure gauge 2032 is used to measure the water pressure. The drain ball valve 2051 is used for the water supply system riser to drain water. The water supply system riser is the riser of the original photovoltaic cleaning system.

[0067] When there are multiple inverters 001, each inverter 011 is independently cooled. The return pipe 203 is used to supply water to two or more cooling water pipes 102. The cooling water pipes 102 are connected in parallel and can simultaneously or individually cool several inverters.

[0068] In combination Figure 4 As shown, the return pipe 203 supplies water to the photovoltaic cleaning system through the cleaning water pipe 208. The cleaning gate valve 2081 is arranged on the cleaning water pipe 208 to control the opening and closing of the waterway. When the photovoltaic panel needs to be cleaned, the cleaning gate valve 2081 is opened to guide the water to the surface of the photovoltaic panel for flushing operation. The cleaning gate valve 2081 is used to open the water supply of the roof photovoltaic cleaning system. When the cleaning gate valve 2081 is opened, the cooling electromagnetic gate valve 1021 is closed. When the cooling electromagnetic gate valve 1021 is opened, the cleaning gate valve 2081 is closed.

[0069] In order to achieve more accurate control, a temperature sensor for monitoring temperature can be arranged near the inverter 001. The controller controls the amount of water sprayed from the water spray head 103 according to the detection value of the temperature sensor. When the temperature reaches the set value, the water spray is started. When the temperature is lower than the set value, the water spray can be stopped.

[0070] In combination Figure 1 , Figure 2As shown, the support assembly 104 provided by the utility model includes a plurality of vertical support rods 1041, horizontal support rods 1042 and oblique support rods 1043, the vertical support rods 1041 and the horizontal support rods 1042 are fixedly crossed to form a frame, the vertical support rods 1041 are vertically and spacedly arranged, the horizontal support rods 1042 are horizontally and spacedly arranged, the vertical support rods 1041 and the horizontal support rods 1042 can be connected by means of bolt fixing, welding and the like to form a horizontal and vertical staggered structure. The oblique support rods 1043 are used for forming oblique support for the frame, the oblique support rods 1043 can be fixed to the vertical support rods 1041 or the horizontal support rods 1042 to form a triangular structure and improve the stability of support. The sunshade 101 and the support assembly 104 are made of stainless steel, and the connection between the sunshade 101 and the support assembly 104 is welded. The cooling water pipe 102 can be fixed on the horizontal support rods 1042 by means of a U-shaped clamp and the like.

[0071] In combination Figure 4 、 Figure 5 As shown, the working process of the photovoltaic inverter water cooling system is as follows:

[0072] When the temperature sensor monitors that the ambient temperature near the inverter 001 is greater than the set maximum temperature limit T1 (for example: 50 DEG C), and the water level sensor 2026 of the lower chamber 2022 detects whether there is water in the lower chamber 2022, if there is no water, the water supply electromagnetic valve 2041, the cooling electromagnetic valve 1021 and the centrifugal pump 2031 start-stop switch are opened, and water is supplied by the water supply pipe network 204. When the photovoltaic water cleaning system is not cleaned, the cleaning valve 2081 is in a closed state. At this time, the tap water from the water supply pipe network 204 will pass through each node of the D-E-C-F-G-H-Q-J-K water pipe path to supply water to the water spray head 103 for cooling.

[0073] If the water level sensor 2026 of the lower chamber 2022 detects that there is water in the lower chamber 2022, the first electromagnetic valve 2035, the cooling electromagnetic valve 1021 and the centrifugal pump 2031 start-stop switch will be opened, at this time, the water collected in the water collecting tank 202 the day before will be supplied to the water spray cooling system through each node of the A-B-C-F-G-H-Q-J-K water pipe path.

[0074] When the water level sensor 2026 of the lower chamber 2022 monitors that the water in the lower chamber 2022 is used up, the first electromagnetic valve 2035 is controlled to be closed, and the water supply electromagnetic valve 2041 is opened, at this time, the water supply is supplied by the factory tap water, and the water spray cooling system is supplied with water through each node of the D-E-C-F-G-H-Q-J-K water pipe path.

[0075] When the temperature of the inverter 001 is reduced to the set temperature minimum value T2 (such as: 35℃), if the factory water supply, the water supply electromagnetic valve 2041, the cooling electromagnetic valve 1021 and the centrifugal pump 2031 start-stop switch will be closed at this time; if the water tank 202 is supplied, the first electromagnetic valve 2035, the cooling electromagnetic valve 1021 and the centrifugal pump 2031 start-stop switch will be closed at this time, stopping the water supply to the water spray cooling system. At this time, the system time relay 2023 will detect the system running time (the time point when the water supply electromagnetic valve 2041 or the first electromagnetic valve 2035 is opened is the starting time of the system running), if the system running time is not 3 hours, the temperature sensor will continue to monitor the ambient temperature near the inverter 001, and judge whether to supply water again; if the system running time is 3 hours, the upper and lower electromagnetic valves 2025 are opened at this time, the water in the upper chamber 2021 of the water tank is discharged to the lower chamber 2022, and the water level sensor 2026 monitors whether there is water in the upper chamber 2021 of the water tank. If there is water, the water will continue to be discharged to the lower chamber 2022, if there is no water, it means that the water in the upper chamber 2021 has been discharged to the lower chamber 2022, then the upper and lower electromagnetic valves 2025 are closed, and the time relay 2023 is reset for the next day's inverter water cooling.

[0076] Generally, in summer, the highest temperature of the roof is from 12:00 to 15:00, so the detection time of the time relay of the water cooling system is 3 hours. The capacity Q (unit: cubic meters) of the water tank 202 can be calculated according to the time period t (unit: hours) of >T1 and the flow rate v (unit: meters / hour) of the water supply system, and the cross-sectional area s (unit: square meters) of the pipeline. Then the water capacity Q1 required by the water tank 202 is v*s*t, so the capacity Q of the water tank is required to be Q>2 v*s*t.

[0077] When the photovoltaic system has a component cleaning plan the next day, the temperature sensor power is turned off in advance through the background, so that the water cooling system will not run. If there is water in the lower chamber 2022 of the water tank, the first electromagnetic valve 2035 and the cleaning valve 2081 can be opened manually through the background, and the water reaches the water supply plug of the photovoltaic cleaning system through the A-B-C-F-G-H-Q-R path to clean the photovoltaic panel components. If there is no water in the lower chamber 2022 of the water tank, the water supply electromagnetic valve 2041 and the cleaning valve 2081 can be opened manually through the background, and the water reaches the water supply plug of the photovoltaic cleaning system through the D-E-C-F-G-H-Q-R path to clean the components.

[0078] The pipes for water flow in the system all use DN32 PPR (Polypropylene Random) pipes, and the vent pipe 207, overflow pipe 206 and drain pipe 205 all use DN50 PPR pipes.

[0079] In combination Figure 6 As shown in the figure, the control system of the photovoltaic inverter water cooling system comprises a control circuit 301, a data acquisition control component 302 and an intelligent monitoring background component 303. The control circuit 301 integrates the control logic of the system, and is connected with various sensors, relays and electromagnetic water gate valves and circuit switches.

[0080] The temperature sensor mainly controls the opening and closing of the water supply electromagnetic gate valve 2041, the first electromagnetic gate valve 2035 and the cooling electromagnetic gate valve 1021 through a temperature signal. The water level signal detected by the water level sensor 2026 in the lower chamber 2022 of the water collecting tank controls the opening and closing of the water supply electromagnetic gate valve 2041, the first electromagnetic gate valve 2035 and the cooling electromagnetic gate valve 1021. The water level signal detected by the water level sensor 2026 in the upper chamber 2021 of the water collecting tank controls the opening and closing of the upper and lower electromagnetic gate valves 2025. The time relay 2023 takes the time point of opening the water supply electromagnetic gate valve 2041 or the first electromagnetic gate valve 2035 as the start time of the system operation. The system running time is detected, and the opening and closing of the upper and lower electromagnetic gate valves 2025 is controlled according to the running time. The data acquisition control system can upload the signals and states of various sensors, relays and electromagnetic gate valves to the monitoring background. At the same time, the parameters of various sensors and relays can be set through the background, and the opening and closing states of the electromagnetic gate valves can be changed, so as to realize intelligent control of the whole system.

[0081] The above description of disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A photovoltaic inverter water cooling system, characterized in that, The sunshade (101), the cooling water pipe (102), the water spraying head (103), the support assembly (104), and the water collecting tray (105); The support assembly (104) is used for supporting the sunshade (101) and the cooling water pipe (102), and the sunshade (101) is above the inverter (001), and the projection of the inverter (001) on the horizontal plane is within the projection of the sunshade (101) on the horizontal plane; The water spraying head (103) is arranged at the end of the cooling water pipe (102) and used for spraying water to the upper surface of the sunshade (101) to achieve cooling; and the water collecting tray (105) is used for collecting water falling from the sunshade (101); The support assembly (104) comprises vertical support rods (1041), horizontal support rods (1042) and inclined support rods (1043), the vertical support rods (1041) and the horizontal support rods (1042) are fixedly crossed to form a frame, and the inclined support rods (1043) are used for forming inclined support for the frame.

2. The photovoltaic inverter water cooling system of claim 1, wherein, The sunshade (101) is in the shape of an umbrella with a high middle and low periphery; and the water spraying head (103) is arranged at the highest point of the sunshade (101). The water collecting tray (105) is annular and can collect water falling from the periphery of the sunshade (101).

3. The photovoltaic inverter water cooling system of claim 2, wherein, The water collecting tray (105) is fixed to the color steel tile roof (002) by a clamp (1051) and is consistent with the inclination of the color steel tile roof (002); The water collecting tray (105) is connected to a water collecting tank (202) through a water collecting pipe (201) to store the collected water.

4. The photovoltaic inverter water cooling system of claim 3, wherein, The inside of the water collecting tank (202) is divided into an upper chamber (2021) and a lower chamber (2022), the water collecting pipe (201) is used for delivering the high-temperature water after heat absorption to the upper chamber (2021), the high-temperature water in the upper chamber (2021) is cooled and then sent to the lower chamber (2022) through an up-down through pipe (2024), and an up-down electromagnetic gate valve (2025) for controlling the opening and closing is arranged on the up-down through pipe (2024); The lower chamber (2022) is delivered to the cooling water pipe (102) through a return pipe (203); A time relay (2023) is installed on the water collecting tank (202).

5. The photovoltaic inverter water cooling system of claim 4, wherein, The return pipe (203) is connected to a water supply pipe network (204) and used for directly delivering water from the water supply pipe network (204) to the cooling water pipe (102); And / or, a drain pipe (205) is connected to the return pipe (203) and used for draining the water in the pipe; And / or, an overflow pipe (206) is connected to the upper part of the upper chamber (2021), and a vent pipe (207) is connected to the lower part of the lower chamber (2022).

6. The photovoltaic inverter water-cooling system of claim 5, wherein, Water level sensors (2026) are arranged in the upper chamber (2021) and the lower chamber (2022) respectively; And / or, vacuum breakers are arranged in the water collecting pipe (201) and the return pipe (203) respectively.

7. The photovoltaic inverter water cooling system of claim 5, wherein, The return pipe (203) is provided with a centrifugal pump (2031), a pressure gauge (2032), a first gate valve (2033), a second gate valve (2034), a first electromagnetic gate valve (2035), a first check valve (2036) and a second check valve (2037); The water supply pipe network (204) is provided with a water supply electromagnetic gate valve (2041), a water supply check valve (2042) and a water meter (2043); The drain pipe (205) is provided with a drain ball valve (2051); The vent pipe (207) is provided with a vent ball valve (2071); The cooling water pipe (102) is provided with a cooling electromagnetic gate valve (1021).

8. The photovoltaic inverter water-cooling system of claim 7, wherein, The return pipe (203) is used for supplying water to two or more cooling water pipes (102). Alternatively, the return pipe (203) supplies water to the photovoltaic cleaning system through the cleaning water pipe (208).

9. The photovoltaic inverter water cooling system of claim 1, wherein, A temperature sensor for monitoring temperature is arranged near the inverter (001), and a controller controls the amount of water sprayed from the water spray head (103) according to the detection value of the temperature sensor.

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