Photovoltaic power generation dry-type transformer

Abstract

The photovoltaic power generation dry-type transformer comprises a transformer body, a transformer shell is installed in the transformer body, an air inlet box is installed on the inner bottom wall of the transformer body, an air outlet box is installed on the inner top wall of the transformer body, and the air inlet box and the air outlet box are located below and above the transformer shell correspondingly; a rainfall sensor is installed on the top of the transformer body and connected with a PLC, and the PLC controls opening and closing of the exhaust valve, the negative pressure fan and the air inlet valve. The device has the beneficial effects that the rainfall sensor is arranged so that the rainfall can be detected during raining, and when the rainfall reaches a set value, the PLC controls the air inlet valve and the exhaust valve to be closed; therefore, air containing more moisture is prevented from entering the transformer body through the air inlet pipe and the exhaust pipe to damage electrical components in the transformer body in rainy days, and the service life of the electrical components in the transformer body is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic power generation dry-type transformers, in particular to a photovoltaic power generation dry-type transformer. Background Art

[0002] Photovoltaic power generation dry-type transformer is a transformer device suitable for photovoltaic power generation system. It has excellent safety performance such as small size, light weight, fireproof, explosion-proof and moisture-proof. Photovoltaic power generation dry-type transformer plays a key role in photovoltaic power generation system. Photovoltaic step-up dry-type transformer is usually used to step up lower voltage to transmission voltage for long-distance power transmission. It is suitable for various photovoltaic power generation systems, including independent photovoltaic power generation, centralized photovoltaic power station, distributed photovoltaic power generation and other scenarios.

[0003] In order to ensure the use effect of dry-type transformers, ventilation holes are usually provided to exchange the hot air flow inside the transformer with the external air flow. However, existing photovoltaic dry-type transformers are mostly installed outdoors. In rainy and snowy weather, the air contains a lot of moisture, which will enter the interior of the transformer through the ventilation holes, easily causing damage to the electrical components inside the transformer and reducing the service life of the transformer. There are certain limitations. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of existing photovoltaic power generation dry-type transformers that are mostly installed outdoors. In rainy and snowy weather, the air contains more moisture and enters the interior of the transformer through the ventilation holes, which can easily cause damage to the electrical components inside the transformer and reduce the service life of the transformer. A photovoltaic power generation dry-type transformer is provided.

[0005] The purpose of the present invention is achieved through the following technical solutions: a photovoltaic power generation dry-type transformer, comprising a transformer body, a transformer housing is installed in the transformer body, an air inlet box is installed on the inner bottom wall of the transformer body, an air outlet box is installed on the inner top wall of the transformer body, the air inlet box and the air outlet box are respectively located below and above the transformer housing, the air inlet end of the air inlet box extends to the outside of the transformer body through an air inlet pipe, an air inlet valve is installed on the air inlet pipe, an exhaust valve is installed on the air outlet end of the air outlet box, the air outlet end of the exhaust valve extends to the outside of the transformer body through the exhaust pipe, a negative pressure fan is installed between the air outlet box and the exhaust valve, and the air inlet box and the air outlet box are respectively located below and above the transformer housing, so that air can flow between the air inlet box and the air outlet box to fully exchange heat with the transformer housing, thereby improving the heat exchange efficiency of the circulating air;

[0006] A rain sensor is installed on the top of the transformer body. The rain sensor is connected to a PLC controller. The PLC controller controls the opening and closing of the exhaust valve, the negative pressure fan and the air intake valve respectively. The rain sensor can detect the rainfall when it rains. When the rainfall reaches the set value, the PLC controller controls the air intake valve and the exhaust valve to close, thereby preventing the air containing more moisture from entering the transformer body through the air intake pipe and the exhaust pipe during rainy weather and causing damage to the electrical components in the transformer body, thereby ensuring the service life of the electrical components in the transformer body.

[0007] An outer shell is installed on the side of the transformer body, a drainage channel is arranged between the outer shell and the transformer body, a rain collecting plate corresponding to the drainage channel is arranged on the top of the transformer body, the rain collecting plate is arranged in an inclined shape, a plurality of groups of guide plates arranged at equal distances are installed in the drainage channel, the guide plates are arranged in an inclined shape, the low point of the guide plates contacts the outer side of the transformer body, and the low point of the guide plates is provided with drainage holes corresponding to the transformer body, by setting the drainage channel, the drainage channel can collect rainwater after the exhaust valve and the intake valve are closed in rainy weather, and the rainwater can fully contact the outer wall of the transformer body through the drainage holes on the inclined guide plates in the drainage channel, thereby exchanging heat with the transformer body, effectively solving the heat dissipation problem of the transformer body after the exhaust valve and the intake valve are closed in rainy weather, thereby ensuring the heat dissipation effect of the transformer body and improving the working efficiency of the transformer body;

[0008] The outer side of the outer shell is provided with equidistantly arranged heat dissipation fins, which are connected to the guide plate. The guide plate is a heat conduction filter plate, and the surface of the guide plate is also coated with anti-rust paint. By arranging the guide plate to be connected with the heat dissipation fins, the heat on the outside of the transformer body can be quickly conducted to the heat dissipation fins through the guide plate for heat dissipation, thereby effectively improving the heat dissipation effect of the transformer body.

[0009] A further technical solution is that air outlets are respectively provided on both sides of the air inlet box, the air inlet pipe is connected with the upper part of the air inlet box, and transverse air baffles and longitudinal air baffles are installed between the air inlet pipe and the air outlet. The transverse air baffles and longitudinal air baffles are provided with through holes arranged at equal distances. By arranging the transverse air baffles and longitudinal air baffles with through holes between the air inlet pipe and the air outlet, the airflow can be effectively stabilized, and the air outlet can have uniform air output, thereby achieving the effect of uniform air supply and making the heat exchange effect of the flowing air better.

[0010] A further technical solution is that the exhaust valve is a two-position three-way solenoid valve, and the other air outlet end of the exhaust valve is connected to the air inlet box through a return pipe. By setting the exhaust valve as a two-position three-way solenoid valve connected to the air inlet box through a return pipe, after the exhaust valve and the air inlet valve are closed in rainy weather, the negative pressure fan circulates the air between the air inlet box and the air outlet box through the return pipe, so that the airflow drives the heat of the transformer shell in the middle of the transformer body to be transferred to the side wall of the transformer body for heat dissipation, further solving the heat dissipation problem of the transformer body after the exhaust valve and the air inlet valve are closed in rainy weather, thereby ensuring the heat dissipation effect of the transformer body.

[0011] A further technical solution is that the transformer housing is installed on the air inlet box, and support columns corresponding to the transformer housing are installed in the air inlet box. The support columns are provided to improve the supporting effect of the air inlet box on the transformer housing and avoid deformation of the air inlet box affecting the ventilation effect.

[0012] A further technical solution is that a baffle corresponding to the drainage channel is installed on the top of the transformer body, the baffle is located on the outside of the water inlet end of the drainage channel, and the rain collecting plate is located on the inside of the water inlet end of the drainage channel. The baffle and the rain collecting plate are arranged to cooperate to guide rainwater into the drainage channel, thereby avoiding rainwater accumulation on the top of the transformer body. At the same time, the amount of rainwater in the drainage channel can be increased, and the heat exchange effect of rainwater in the drainage channel on the side wall of the transformer body can be improved.

[0013] A further technical solution is that the air inlet end of the air outlet box is arranged on both sides of the air outlet box, and the air outlet end of the air inlet box and the air inlet end of the air outlet box are arranged opposite to the side of the transformer body. By arranging the air outlet end of the air inlet box and the air inlet end of the air outlet box are arranged opposite to the side of the transformer body, the flowing air carrying heat can quickly exchange heat with the side wall of the transformer body in rainy weather, so that the rainwater on the outside can take away the heat, effectively improving the heat exchange effect of the equipment.

[0014] A further technical solution is that a temperature sensor connected to the PLC controller is provided in the transformer body. A temperature sensor connected to the PLC controller is provided in the transformer body. The PLC controller can shut down the negative pressure fan when the temperature in the transformer body is lower than a set value, thereby effectively reducing energy consumption.

[0015] A further technical solution is that a base is installed on the bottom surface of the transformer body, and an inclined portion corresponding to the water outlet end of the drainage channel is provided on the base. The inclined portion can guide the water discharged from the drainage channel to the outside of the base to prevent rainwater from accumulating on the base.

[0016] A further technical solution is that a first filter is installed at the water inlet end of the drainage channel. The first filter can prevent external impurities from entering the drainage channel and causing blockage in the drainage channel, thereby affecting the drainage effect of the drainage channel.

[0017] A further technical solution is that the air inlet end of the air inlet pipe and the air outlet end of the exhaust pipe are both arranged downward, and the air inlet end of the air inlet pipe and the air outlet end of the exhaust pipe are both installed with a second filter, and the second filter is arranged in a cylindrical shape. The cylindrical second filter can not only prevent external impurities from entering the transformer body, but also has good water permeability in rainy weather, so that rainwater can backwash the second filter and achieve a self-cleaning effect.

[0018] The present invention has the following advantages: 1. The present invention arranges the air inlet box and the air outlet box respectively below and above the transformer housing, so that the air can flow between the air inlet box and the air outlet box to fully exchange heat with the transformer housing, thereby improving the heat exchange efficiency of the circulating air. By arranging a rain sensor, the rainfall can be detected when it rains. When the rainfall reaches the set value, the PLC controller controls the air inlet valve and the exhaust valve to close, thereby preventing the air containing more moisture from entering the transformer body through the air inlet pipe and the exhaust pipe in rainy weather to damage the electrical components in the transformer body, thereby ensuring the service life of the electrical components in the transformer body.

[0019] 2. By setting up the drainage channel, the drainage channel can collect rainwater after the exhaust valve and the air inlet valve are closed in rainy weather. The rainwater can fully contact the outer wall of the transformer body through the drainage holes on the inclined guide plate in the drainage channel, thereby exchanging heat with the transformer body, effectively solving the heat dissipation problem of the transformer body after the exhaust valve and the air inlet valve are closed in rainy weather, thereby ensuring the heat dissipation effect of the transformer body and improving the working efficiency of the transformer body BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a front view schematic cross-sectional view of the structure of the present invention;

[0021] Figure 2 It is a schematic cross-sectional side view of the structure of the present invention;

[0022] Figure 3 It is a cross-sectional schematic diagram of the air inlet box in the present invention;

[0023] Figure 4 It is a schematic diagram of the top view of the structure of the present invention;

[0024] Figure 5 It is a schematic diagram of a partial three-dimensional structure of the guide plate in the present invention;

[0025] In the figure, 1. transformer body; 2. transformer shell; 3. air inlet box; 4. air outlet box; 5. air inlet pipe; 6. exhaust valve; 7. negative pressure fan; 8. exhaust pipe; 9. return pipe; 10. rain sensor; 11. air inlet valve; 12. base; 13. longitudinal wind baffle; 14. transverse wind baffle; 15. through hole; 16. support column; 17. air outlet; 18. baffle; 19. rain collecting plate; 20. drainage channel; 21. outer shell; 22. guide plate; 23. drainage hole; 24. heat dissipation fin; 25. first filter; 26. inclined portion; 27. second filter. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example 1: Figures 1 to 5 As shown, a photovoltaic power generation dry-type transformer comprises a transformer body 1, a transformer housing 2 is installed in the transformer body 1, an air inlet box 3 is installed on the inner bottom wall of the transformer body 1, an air outlet box 4 is installed on the inner top wall of the transformer body 1, the air inlet box 3 and the air outlet box 4 are respectively located below and above the transformer housing 2, the air inlet end of the air inlet box 3 extends to the outside of the transformer body 1 through an air inlet pipe 5, an air inlet valve 11 is installed on the air inlet pipe 5, an exhaust valve 6 is installed at the air outlet end of the air outlet box 4, the air outlet end of the exhaust valve 6 extends to the outside of the transformer body 1 through an exhaust pipe 8, a negative pressure fan 7 is installed between the air outlet box 4 and the exhaust valve 6, and the air inlet box 3 and the air outlet box 4 are respectively located below and above the transformer housing 2, so that the air can flow between the air inlet box 3 and the air outlet box 4 to fully exchange heat with the transformer housing 2, thereby improving the heat exchange efficiency of the circulating air;

[0033] A rain sensor 10 is installed on the top of the transformer body 1. The rain sensor 10 is connected to a PLC controller. The PLC controller controls the opening and closing of the exhaust valve 6, the negative pressure fan 7 and the air inlet valve 11 respectively. The rain sensor 10 can detect the rainfall when it rains. When the rainfall reaches the set value, the PLC controller controls the air inlet valve 11 and the exhaust valve 6 to close, thereby preventing the air containing more moisture from entering the transformer body 1 through the air inlet pipe 5 and the exhaust pipe 8 during rainy weather to damage the electrical components in the transformer body 1, thereby ensuring the service life of the electrical components in the transformer body 1;

[0034] An outer shell 21 is installed on the side of the transformer body 1, and a drainage channel 20 is arranged between the outer shell 21 and the transformer body 1. A rain collecting plate 19 corresponding to the drainage channel 20 is arranged on the top of the transformer body 1. The rain collecting plate 19 is arranged in an inclined shape. A plurality of groups of guide plates 22 arranged at equal distances are installed in the drainage channel 20. The guide plates 22 are arranged in an inclined shape. The low point of the guide plates 22 contacts the outer side of the transformer body 1, and the low point of the guide plates 22 is provided with a drainage hole 23 corresponding to the transformer body 1. By setting the drainage channel 20, the drainage channel 20 can collect rainwater after the exhaust valve 6 and the intake valve 11 are closed in rainy weather. The rainwater can fully contact the outer wall of the transformer body 1 through the drainage holes 23 on the inclined guide plates 22 in the drainage channel 20, thereby exchanging heat with the transformer body 1, effectively solving the heat dissipation problem of the transformer body 1 after the exhaust valve 6 and the intake valve 11 are closed in rainy weather, thereby ensuring the heat dissipation effect of the transformer body 1 and improving the working efficiency of the transformer body 1.

[0035] The outer side of the outer shell 21 is provided with heat dissipation fins 24 arranged at equal distances. The heat dissipation fins 24 are connected to the guide plate 22. The guide plate 22 is a heat conduction filter plate. The surface of the guide plate 22 is also coated with anti-rust paint. By arranging the guide plate 22 to be connected with the heat dissipation fins 24, the heat on the outside of the transformer body 1 can be quickly conducted to the heat dissipation fins 24 through the guide plate 22 for heat dissipation, thereby effectively improving the heat dissipation effect of the transformer body 1.

[0036] Air outlets 17 are respectively provided on both sides of the air inlet box 3, the air inlet pipe 5 is connected with the upper part of the air inlet box 3, and a transverse air baffle 14 and a longitudinal air baffle 13 are installed between the air inlet pipe 5 and the air outlet 17. The transverse air baffle 14 and the longitudinal air baffle 13 are provided with through holes 15 arranged at equal distances. By arranging the transverse air baffle 14 and the longitudinal air baffle 13 with through holes 15 between the air inlet pipe 5 and the air outlet 17, the airflow can be effectively stabilized, and the air outlet 17 can have uniform air discharge, thereby achieving the effect of uniform air supply and making the heat exchange effect of the flowing air better.

[0037] The exhaust valve 6 is a two-position three-way solenoid valve, and the other air outlet end of the exhaust valve 6 is connected to the air inlet box 3 through the return pipe 9. By setting the exhaust valve 6 as a two-position three-way solenoid valve connected to the air inlet box 3 through the return pipe 9, after the exhaust valve 6 and the air inlet valve 11 are closed in rainy weather, the negative pressure fan 7 can circulate the airflow between the air inlet box 3 and the air outlet box 4 through the return pipe 9, so that the airflow drives the heat of the transformer housing 2 in the middle of the transformer body 1 to be transferred to the side wall of the transformer body 1 for heat dissipation, further solving the heat dissipation problem of the transformer body 1 after the exhaust valve 6 and the air inlet valve 11 are closed in rainy weather, thereby ensuring the heat dissipation effect of the transformer body 1;

[0038] The transformer housing 2 is installed on the air inlet box 3, and a support column 16 corresponding to the transformer housing 2 is installed in the air inlet box 3. The support column 16 is provided to improve the supporting effect of the air inlet box 3 on the transformer housing 2 and prevent the air inlet box 3 from deforming and affecting the ventilation effect.

[0039] A baffle 18 corresponding to the drainage channel 20 is installed on the top of the transformer body 1. The baffle 18 is located on the outside of the water inlet end of the drainage channel 20, and the rain collecting plate 19 is located on the inside of the water inlet end of the drainage channel 20. The baffle 18 cooperates with the rain collecting plate 19 to guide rainwater into the drainage channel 20, thereby avoiding rainwater accumulation on the top of the transformer body 1. At the same time, the amount of rainwater in the drainage channel 20 can be increased, and the heat exchange effect of rainwater in the drainage channel 20 on the side wall of the transformer body 1 can be improved.

[0040] The air inlet end of the air outlet box 4 is arranged on both sides of the air outlet box 4, and the air outlet end of the air inlet box 3 and the air inlet end of the air outlet box 4 are arranged opposite to the side of the transformer body 1. By arranging the air outlet end of the air inlet box 3 and the air inlet end of the air outlet box 4 to be arranged opposite to the side of the transformer body 1, the flowing air carrying heat can quickly exchange heat with the side wall of the transformer body 1 in rainy weather, so that the rainwater on the outside can take away the heat, effectively improving the heat exchange effect of the equipment.

[0041] Example 2: Figures 1 to 5 As shown, a photovoltaic power generation dry-type transformer comprises a transformer body 1, a transformer housing 2 is installed in the transformer body 1, an air inlet box 3 is installed on the inner bottom wall of the transformer body 1, an air outlet box 4 is installed on the inner top wall of the transformer body 1, the air inlet box 3 and the air outlet box 4 are respectively located below and above the transformer housing 2, the air inlet end of the air inlet box 3 extends to the outside of the transformer body 1 through an air inlet pipe 5, an air inlet valve 11 is installed on the air inlet pipe 5, an exhaust valve 6 is installed at the air outlet end of the air outlet box 4, the air outlet end of the exhaust valve 6 extends to the outside of the transformer body 1 through an exhaust pipe 8, a negative pressure fan 7 is installed between the air outlet box 4 and the exhaust valve 6, and the air inlet box 3 and the air outlet box 4 are respectively located below and above the transformer housing 2, so that the air can flow between the air inlet box 3 and the air outlet box 4 to fully exchange heat with the transformer housing 2, thereby improving the heat exchange efficiency of the circulating air;

[0042] A rain sensor 10 is installed on the top of the transformer body 1. The rain sensor 10 is connected to a PLC controller. The PLC controller controls the opening and closing of the exhaust valve 6, the negative pressure fan 7 and the air inlet valve 11 respectively. The rain sensor 10 can detect the rainfall when it rains. When the rainfall reaches the set value, the PLC controller controls the air inlet valve 11 and the exhaust valve 6 to close, thereby preventing the air containing more moisture from entering the transformer body 1 through the air inlet pipe 5 and the exhaust pipe 8 during rainy weather to damage the electrical components in the transformer body 1, thereby ensuring the service life of the electrical components in the transformer body 1;

[0043] An outer shell 21 is installed on the side of the transformer body 1, and a drainage channel 20 is arranged between the outer shell 21 and the transformer body 1. A rain collecting plate 19 corresponding to the drainage channel 20 is arranged on the top of the transformer body 1. The rain collecting plate 19 is arranged in an inclined shape. A plurality of groups of guide plates 22 arranged at equal distances are installed in the drainage channel 20. The guide plates 22 are arranged in an inclined shape. The low point of the guide plates 22 contacts the outer side of the transformer body 1, and the low point of the guide plates 22 is provided with a drainage hole 23 corresponding to the transformer body 1. By setting the drainage channel 20, the drainage channel 20 can collect rainwater after the exhaust valve 6 and the intake valve 11 are closed in rainy weather. The rainwater can fully contact the outer wall of the transformer body 1 through the drainage holes 23 on the inclined guide plates 22 in the drainage channel 20, thereby exchanging heat with the transformer body 1, effectively solving the heat dissipation problem of the transformer body 1 after the exhaust valve 6 and the intake valve 11 are closed in rainy weather, thereby ensuring the heat dissipation effect of the transformer body 1 and improving the working efficiency of the transformer body 1.

[0044] The outer side of the outer shell 21 is provided with heat dissipation fins 24 arranged at equal distances. The heat dissipation fins 24 are connected to the guide plate 22. The guide plate 22 is a heat conduction filter plate. The surface of the guide plate 22 is also coated with anti-rust paint. By arranging the guide plate 22 to be connected with the heat dissipation fins 24, the heat on the outside of the transformer body 1 can be quickly conducted to the heat dissipation fins 24 through the guide plate 22 for heat dissipation, thereby effectively improving the heat dissipation effect of the transformer body 1.

[0045] Air outlets 17 are respectively provided on both sides of the air inlet box 3, the air inlet pipe 5 is connected with the upper part of the air inlet box 3, and a transverse air baffle 14 and a longitudinal air baffle 13 are installed between the air inlet pipe 5 and the air outlet 17. The transverse air baffle 14 and the longitudinal air baffle 13 are provided with through holes 15 arranged at equal distances. By arranging the transverse air baffle 14 and the longitudinal air baffle 13 with through holes 15 between the air inlet pipe 5 and the air outlet 17, the airflow can be effectively stabilized, and the air outlet 17 can have uniform air discharge, thereby achieving the effect of uniform air supply and making the heat exchange effect of the flowing air better.

[0046] The exhaust valve 6 is a two-position three-way solenoid valve, and the other air outlet end of the exhaust valve 6 is connected to the air inlet box 3 through the return pipe 9. By setting the exhaust valve 6 as a two-position three-way solenoid valve connected to the air inlet box 3 through the return pipe 9, after the exhaust valve 6 and the air inlet valve 11 are closed in rainy weather, the negative pressure fan 7 circulates the air flow between the air inlet box 3 and the air outlet box 4 through the return pipe 9, so that the air flow drives the heat of the transformer shell 2 in the middle of the transformer body 1 to be transferred to the side wall of the transformer body 1 for heat dissipation, further solving the heat dissipation problem of the transformer body 1 after the exhaust valve 6 and the air inlet valve 11 are closed in rainy weather, thereby ensuring the heat dissipation effect of the transformer body 1.

[0047] The transformer housing 2 is installed on the air inlet box 3, and a support column 16 corresponding to the transformer housing 2 is installed in the air inlet box 3. The support column 16 is provided to improve the supporting effect of the air inlet box 3 on the transformer housing 2 and prevent the air inlet box 3 from deforming and affecting the ventilation effect.

[0048] A baffle 18 corresponding to the drainage channel 20 is installed on the top of the transformer body 1. The baffle 18 is located on the outside of the water inlet end of the drainage channel 20, and the rain collecting plate 19 is located on the inside of the water inlet end of the drainage channel 20. The baffle 18 cooperates with the rain collecting plate 19 to guide rainwater into the drainage channel 20, thereby avoiding rainwater accumulation on the top of the transformer body 1. At the same time, the amount of rainwater in the drainage channel 20 can be increased, and the heat exchange effect of rainwater in the drainage channel 20 on the side wall of the transformer body 1 can be improved.

[0049] The air inlet end of the air outlet box 4 is arranged on both sides of the air outlet box 4, and the air outlet end of the air inlet box 3 and the air inlet end of the air outlet box 4 are arranged opposite to the side of the transformer body 1. By arranging the air outlet end of the air inlet box 3 and the air inlet end of the air outlet box 4 to be arranged opposite to the side of the transformer body 1, the flowing air carrying heat can quickly exchange heat with the side wall of the transformer body 1 in rainy weather, so that the rainwater on the outside can take away the heat, effectively improving the heat exchange effect of the equipment.

[0050] A temperature sensor connected to the PLC controller is arranged in the transformer body 1. A temperature sensor connected to the PLC controller is arranged in the transformer body 1. The PLC controller can shut down the negative pressure fan 7 when the temperature in the transformer body 1 is lower than the set value, thereby effectively reducing energy consumption.

[0051] A base 12 is installed on the bottom surface of the transformer body 1, and an inclined portion 26 corresponding to the water outlet end of the drainage channel 20 is provided on the base 12. The inclined portion 26 can guide the water discharged from the drainage channel 20 to the outside of the base 12 to prevent rainwater from accumulating on the base 12. A first filter 25 is installed at the water inlet end of the drainage channel 20. The first filter 25 can prevent external impurities from entering the drainage channel 20 and causing blockage in the drainage channel 20, thereby affecting the drainage effect of the drainage channel 20.

[0052] The air inlet end of the air inlet pipe 5 and the air outlet end of the exhaust pipe 8 are both arranged downward, and the air inlet end of the air inlet pipe 5 and the air outlet end of the exhaust pipe 8 are both installed with a second filter 27, and the second filter 27 is arranged in a cylindrical shape. The cylindrical second filter 27 can not only prevent external impurities from entering the transformer body 1, but also has good water permeability in rainy weather, so that rainwater can backwash the second filter 27 to achieve a self-cleaning effect.

[0053] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A photovoltaic power generation dry-type transformer, comprising a transformer body (1), wherein a transformer housing (2) is installed in the transformer body (1), characterized in that: An air inlet box (3) is installed on the inner bottom wall of the transformer body (1), and an air outlet box (4) is installed on the inner top wall of the transformer body (1); the air inlet box (3) and the air outlet box (4) are respectively located below and above the transformer housing (2); the air inlet end of the air inlet box (3) extends to the outside of the transformer body (1) through an air inlet pipe (5); an air inlet valve (11) is installed on the air inlet pipe (5); an air outlet end of the air outlet box (4) is installed with an exhaust valve (6); the air outlet end of the exhaust valve (6) extends to the outside of the transformer body (1) through an exhaust pipe (8); and a negative pressure fan (7) is installed between the air outlet box (4) and the exhaust valve (6); A rainfall sensor (10) is installed on the top of the transformer body (1), and the rainfall sensor (10) is connected to a PLC controller, and the PLC controller controls the opening and closing of the exhaust valve (6), the negative pressure fan (7) and the intake valve (11) respectively; An outer shell (21) is installed on the side of the transformer body (1), a drainage channel (20) is arranged between the outer shell (21) and the transformer body (1), a rain collecting plate (19) corresponding to the drainage channel (20) is arranged on the top of the transformer body (1), the rain collecting plate (19) is arranged in an inclined shape, a plurality of groups of guide plates (22) arranged at equal distances are installed in the drainage channel (20), the guide plates (22) are arranged in an inclined shape, the low points of the guide plates (22) are in contact with the outer side of the transformer body (1), and the low points of the guide plates (22) are provided with drainage holes (23) corresponding to the transformer body (1); the outer side of the outer shell (21) is provided with heat dissipation fins (24) arranged at equal distances, and the heat dissipation fins (24) are connected to the guide plates (22).

2. A photovoltaic power generation dry-type transformer according to claim 1, characterized in that: Air outlets (17) are respectively arranged on both sides of the air inlet box (3); the air inlet pipe (5) is connected to the upper part of the air inlet box (3); a transverse air baffle plate (14) and a longitudinal air baffle plate (13) are installed between the air inlet pipe (5) and the air outlet (17); and through holes (15) arranged at equal distances are opened on the transverse air baffle plate (14) and the longitudinal air baffle plate (13).

3. A photovoltaic power generation dry-type transformer according to claim 1, characterized in that: The exhaust valve (6) is a two-position three-way solenoid valve, and the other air outlet end of the exhaust valve (6) is connected to the air inlet box (3) via a return pipe (9).

4. A photovoltaic power generation dry-type transformer according to claim 1, characterized in that: The transformer housing (2) is mounted on an air inlet box (3), and a support column (16) corresponding to the transformer housing (2) is mounted in the air inlet box (3).

5. A photovoltaic power generation dry-type transformer according to claim 1, characterized in that: A baffle (18) corresponding to the drainage channel (20) is installed on the top of the transformer body (1); the baffle (18) is located on the outside of the water inlet end of the drainage channel (20); and the rain collecting plate (19) is located on the inside of the water inlet end of the drainage channel (20).

6. A photovoltaic power generation dry-type transformer according to claim 1, characterized in that: The air inlet end of the air outlet box (4) is arranged on both sides of the air outlet box (4), and the air outlet end of the air inlet box (3) and the air inlet end of the air outlet box (4) are both arranged opposite to the side of the transformer body (1).

7. A photovoltaic power generation dry-type transformer according to claim 1, characterized in that: A temperature sensor connected to a PLC controller is arranged inside the transformer body (1).

8. The photovoltaic power generation dry-type transformer according to claim 1, characterized in that: A base (12) is installed on the bottom surface of the transformer body (1), and an inclined portion (26) corresponding to the water outlet end of the drainage channel (20) is provided on the base (12).

9. The photovoltaic power generation dry-type transformer according to claim 1, characterized in that: A first filter screen (25) is installed at the water inlet end of the drainage channel (20).

10. A photovoltaic power generation dry-type transformer according to claim 1, characterized in that: The air inlet end of the air inlet pipe (5) and the air outlet end of the exhaust pipe (8) are both arranged downwards, and the air inlet end of the air inlet pipe (5) and the air outlet end of the exhaust pipe (8) are both installed with a second filter (27), and the second filter (27) is arranged in a cylindrical shape.

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