Photovoltaic box-type transformer for severe environment

Abstract

The invention relates to the technical field of photovoltaic equipment, in particular to a photovoltaic box-type transformer for a severe environment. The box-type transformer comprises a box-type transformer body, the box-type transformer body is provided with a shell used for providing protection for the whole box-type transformer, the shell is provided with a mounting chamber and a working element used for mounting the box-type transformer body, the shell is provided with an air inlet chamber, the air inlet chamber is internally provided with an air inlet mechanism, and the air inlet mechanism adopts an air pump as a conveying element. And external airflow is conveyed into the mounting chamber. The first filter plate is arranged on the air inlet cylinder, air flow can be preliminarily filtered, the air flow can be further sprayed and filtered in the mode that the water pump is adopted for pumping water flow and then spraying is conducted through the spray head, therefore, the purity of the air flow can be guaranteed, and it is guaranteed that in the heat dissipation process, the heat dissipation efficiency is improved. And the box-type transformer cannot be damaged due to impurities contained in the airflow, so that the protection effect on the box-type transformer is improved.

Description

Technical Field

[0001] The invention relates to the technical field of photovoltaic equipment, and in particular to a photovoltaic box-type transformer for harsh environments. Background Art

[0002] Photovoltaic box transformer, referred to as photovoltaic box transformer, is a kind of power equipment specially designed for photovoltaic power generation system. In photovoltaic power generation system, its main function is to convert the DC power generated by solar panels into AC power suitable for power grid or user. It is usually installed in the booster station of photovoltaic power station to convert the low-voltage DC power generated by photovoltaic panels into high-voltage AC power for transmission to the power grid. According to different uses and structures, it can be divided into many types, such as European box transformer, American box transformer, integrated box transformer, etc. Its shell is generally made of solid metal material with good protection performance. Its internal structure is complex and delicate, including transformer, high-voltage switch cabinet, low-voltage switch cabinet, lightning arrester and other equipment. When it is used, it is generally in direct contact with the external environment. In this process, it is easily affected by the external environment, especially in some harsh environments, which will affect the service life of photovoltaic box transformer.

[0003] In the prior art, there is a new energy photovoltaic box transformer cooling device (publication number: CN117079928B), which can ventilate the inside of the cabinet through the operation of the internal fan, so that the heat generated inside can be transported to the outside, and the heat generated inside can be quickly absorbed by the operation of the bottom condenser and the use of the heat sink, so that the inside of the cabinet can be quickly cooled down, and the cooling rate is higher, so that the inside of the cabinet will not be at high temperature for a long time, which is more conducive to the normal operation of the internal devices. However, during the operation of the new energy photovoltaic box transformer cooling device, it mainly changes the shielding area of ​​the baffle to the ventilation slot by adjusting the position of the baffle inside the adjustment slot, so that the ventilation slot can be in a closed state when the fan is not in use, and then open it when it is used to reduce the entry of external dust and impurities into the interior. This dust shielding method is in some harsh environments, such as in deserts with heavy sand and its surrounding areas. In seasons with heavy sand, particles in the sand are easy to enter the photovoltaic box transformer through the ventilation slot, causing damage to the devices inside it, reducing the safety of the photovoltaic box inverter.

[0004] To this end, it is necessary to filter it through a better filtering device. In the prior art, there is a sand and gravel feeding dust prevention and conveying equipment (publication number: CN118458422A), which arranges a spray assembly in the ceiling, and the spray assembly includes a swing rod rotatably connected to the top of the ceiling, and a spray plate is fixedly connected to the swing rod along its length direction. A plurality of evenly arranged nozzles are arranged on the surface of the spray plate, and a control assembly for controlling the reciprocating swing of the swing rod to control the spraying position of the nozzle is arranged in the feed box. Under the action of the spray assembly, dust is prevented from being generated during the sand and gravel feeding process, so as to improve the dust reduction and dust prevention effect. However, due to the wide spraying range, a spray blank area is likely to appear during the spraying process, which in turn affects the quality of dust reduction and dust prevention. Summary of the invention

[0005] In view of the problems existing in the background technology, a photovoltaic box-type transformer for harsh environments is proposed.

[0006] The present invention proposes a photovoltaic box-type transformer for harsh environments, comprising a box-type transformer body, a shell provided on the box-type transformer body for providing protection for the entire box-type transformer, an installation chamber provided on the shell for installing working components of the box-type transformer body, an air intake chamber provided on the shell, an air intake mechanism provided in the air intake chamber, the air intake mechanism adopts an air pump as a conveying element to convey external airflow into the installation chamber to provide heat dissipation for the working components on the box-type transformer body; an airflow filtering mechanism is provided in the air intake chamber, the airflow filtering mechanism adopts a water pump as a working element, and filters the airflow entering the installation chamber by spraying with conveyed water flow to remove dust and impurities in the airflow in the harsh environment, and the airflow filtering mechanism is used in conjunction with the air intake mechanism to ensure the purity of the airflow entering the installation chamber.

[0007] Preferably, the air intake mechanism is composed of a filter cartridge, an air intake cartridge, an air pump, air pipe one, a drying frame, air pipe two and air pipe three. The filter cartridge is arranged in the air intake chamber, the air intake cartridge is installed on the filter cartridge, one end of the air intake cartridge extends outside the outer shell, the air pump is arranged in the air intake chamber, air pipe one is installed on the air pump, one end of air pipe one extends into the installation chamber, the drying frame is arranged in the air intake chamber, air pipe two is installed on the drying frame, the other end of air pipe two is connected to the air pump, air pipe three is installed on the drying frame, and the other end of air pipe three is connected to the filter cartridge.

[0008] Preferably, the air flow filtering mechanism is composed of a water tank, a water pump, a water pipe and a nozzle. The water tank is arranged in the air intake chamber, the water tank is connected to the filter cartridge, the water pump is installed on the water tank, the water inlet on the water pump is connected to the water tank, the water pipe is installed on the water pump, the nozzle is rotatably installed on the water pipe, and one end of the nozzle extends into the filter cartridge and is rotatably arranged with the filter cartridge.

[0009] Preferably, a fixing rod is installed in the filter cartridge, and a spiral blade is installed in the filter cartridge. The spiral blade is connected to the fixing rod, and the spiral blade can make the airflow entering the filter cartridge flow in a spiral manner, thereby increasing the movement time of the airflow in the filter cartridge.

[0010] Preferably, a fixing sleeve is installed on the filter cartridge, the nozzle penetrates the fixing sleeve and is rotatably connected to the fixing sleeve, and the side of the fixing sleeve facing the inside of the filter cartridge is designed to be trumpet-shaped, so as to facilitate the nozzle to expand the spraying range.

[0011] Preferably, a fixed frame is installed on the water tank, a transmission rod is rotatably installed on the fixed frame, the top of the transmission rod extends into the second air pipe, the transmission rod is rotatably connected to the second air pipe, one end of the transmission rod located in the second air pipe is sleeved with a rotating blade, a connecting rod 1 is rotatably installed on the filter cartridge, a connecting rod 2 is rotatably installed on the fixed frame, a transmission assembly 1 is provided on the connecting rod 1 and the connecting rod 2, the connecting rod 2 is meshed with the transmission rod through gears, and the transmission rod is used to drive the connecting rod 2 to rotate, and a transmission assembly 2 is provided on the nozzle and the connecting rod 2, and the connecting rod 2 is used to drive the nozzle to rotate.

[0012] Preferably, a breaking block is rotatably mounted on the fixed rod, a connecting rod is mounted on the breaking block, the connecting rod is connected to the nozzle, and the nozzle is used to drive the breaking block to rotate, and the water flow sprayed from the nozzle can be broken up and splashed back by the breaking block.

[0013] Preferably, a drying plate is provided in the drying frame for drying water vapor in the air flow, a heating element is installed on the drying frame for heating the air flow in the space of the drying frame, a water pipe is installed on the gas supply pipe 2, the water pipe is connected to the water tank, and a solenoid valve 1 is provided on the water pipe.

[0014] Preferably, a return hole is provided on the filter cartridge, the return hole extends to the water tank, a filter frame is installed on the water tank, the return hole is connected to the filter frame, a collection frame is provided in the filter frame, one side of the collection frame extends outside the water tank, and the collection frame is connected to the water tank by bolts.

[0015] Preferably, a plurality of water leakage holes are provided on the spiral blade, and the plurality of water leakage holes are all arranged in a bucket shape.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: By setting a filter plate on the air inlet, the preliminary filtration of the airflow can be completed. By using a water pump to extract water and then spraying it through a nozzle, the airflow can be further sprayed and filtered, thereby ensuring the purity of the airflow and ensuring that the box-type transformer will not be damaged by impurities contained in the airflow during the heat dissipation process, thereby improving the protection effect of the box-type transformer; The use of spiral blades can make the air flow in the filter cartridge in a spiral upward manner, thereby buffering the flow of the air flow, allowing it to be sprayed and filtered more comprehensively in the filter cartridge, thereby improving the filtering effect of impurities in the air; By setting the blades, the rotation force generated by the airflow can be used to drive the nozzle to rotate through the transmission rod, the transmission component 1 and the transmission component 2, so that the water flow sprayed by the nozzle can be parabolic, the spraying range of the nozzle can be improved, the comprehensiveness of the spraying of the nozzle can be increased, and the spraying blanks can be reduced. At the same time, under the action of the scattering block, the sprayed water flow can be irregularly scattered and splashed back, so that the water flow generated by the spraying can move more comprehensively in the filter cartridge, thereby improving the air filtration effect; By setting leakage holes on the spiral blades, the water flowing on the spiral blades can drip downwards, thus forming another spray pattern. Under the parabolic spray of the nozzle and the irregular scattering and back-splashing spray of the scattering block, impurities in the air can be fully filtered to ensure the purity of the airflow entering the installation room, thereby further improving the protection effect of the box-type inverter body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the air inlet chamber in the present invention; Figure 3 It is a schematic diagram of the structure of the air intake mechanism and the airflow filtering mechanism in the present invention; Figure 4 It is a schematic cross-sectional structure diagram of the filter cartridge in the present invention; Figure 5 It is a structural schematic diagram of the nozzle, the breaking block, the transmission component 1 and the transmission component 2 of the present invention; Figure 6 It is a schematic cross-sectional structural diagram of the water tank in the present invention; Figure 7 It is a schematic cross-sectional structure diagram of the drying frame in the present invention; Figure 8 It is a structural schematic diagram of the air intake cylinder in the present invention.

[0018] Figure numerals: 1, outer shell; 2, air inlet chamber; 3, air outlet frame; 4, water tank; 5, water inlet pipe; 6, filter cartridge; 7, air pump; 8, air pipe one; 9, drying frame; 10, air pipe two; 11, air pipe three; 12, water pump; 13, water pipe; 14, nozzle; 15, spiral blade; 16, fixing rod; 17, transmission rod; 18, rotating blade; 19, transmission component one; 20, transmission component two; 21, fixing sleeve; 22, breaking block; 23, connecting rod; 24, filter frame; 25, collecting frame; 26, drying plate; 27, heating element; 28, fixing frame; 29, air inlet cartridge. DETAILED DESCRIPTION

[0019] like Figure 1-Figure 8 As shown, the present invention proposes a photovoltaic box-type transformer for harsh environments, comprising: a box-type transformer body, a shell 1, an air intake chamber 2, an air intake mechanism and an airflow filtering mechanism, and the box-type transformer is constructed using existing technology.

[0020] like Figure 1-Figure 8 As shown, a shell 1 is provided on the box-type transformer body for providing protection for the entire box-type transformer, an installation chamber is provided on the shell 1 for installing the working components of the box-type transformer body, an air outlet frame 3 is installed on the shell 1, and the air outlet frame 3 is connected to the installation chamber for discharging the airflow in the installation chamber, and a filter plate 2 is installed on the side of the air outlet frame 3 away from the installation chamber for preventing the outside airflow from entering the installation chamber, and the air outlet frame 3 is arranged in an L shape, which can better block dust, an air inlet chamber 2 is provided on the shell 1, and an air inlet mechanism is provided in the air inlet chamber 2, and the air inlet mechanism adopts an air pump 7 as a conveying element to convey the outside airflow into the installation chamber to provide heat dissipation for the working components on the box-type transformer body; an airflow filtering mechanism is provided in the air inlet chamber 2, and the airflow filtering mechanism adopts a water pump 12 as a working element, and the airflow entering the installation chamber is filtered by spraying with conveyed water flow to remove dust and impurities in the airflow in the harsh environment, and the airflow filtering mechanism is used in conjunction with the air inlet mechanism to ensure the purity of the airflow entering the installation chamber.

[0021] like Figure 1-Figure 7As shown, the air intake mechanism is composed of a filter cartridge 6, an air intake cartridge 29, an air pump 7, an air delivery pipe 1 8, a drying frame 9, an air delivery pipe 2 10 and an air delivery pipe 3 11. The filter cartridge 6 is arranged in the air intake chamber 2. A fixing rod 16 is installed in the filter cartridge 6. A spiral blade 15 is installed in the filter cartridge 6. The spiral blade 15 is connected to the fixing rod 16. The spiral blade 15 can make the airflow entering the filter cartridge 6 flow in a spiral manner to increase the moving time of the airflow in the filter cartridge 6. A plurality of water leakage holes are opened on the spiral blade 15. The plurality of water leakage holes are all arranged in a bucket shape. By arranging the water leakage bucket in a bucket shape, water flow can be accumulated above the water leakage hole. Under the action of the accumulated water flow, the air flow can be prevented from moving upward directly through the water leakage hole, thereby ensuring that the water flow flows in the filter cartridge 6 along the spiral direction. The air intake cartridge 29 is installed on the filter cartridge 6. The air intake cartridge 29 One end of the air inlet cylinder 29 extends to the outside of the shell 1, and the end of the air inlet cylinder 29 away from the filter cylinder 6 is provided with a filter frame cover through a threaded connection, and a filter plate 1 is provided on the filter frame cover, so that the filter plate 1 can be conveniently disassembled and replaced, and the airflow entering the installation room can be preliminarily filtered through the filter plate 1. The end of the air inlet cylinder 29 located outside the shell 1 is arranged in an L shape, which can better prevent external dust from contacting the filter plate 1 through the wind flow, thereby improving the protection of the filter plate 1. The air pump 7 is arranged in the air inlet chamber 2, and the air supply pipe 1 8 is installed on the air pump 7. One end of the air supply pipe 1 8 extends to the installation room. The drying frame 9 is arranged in the air inlet chamber 2, and the air supply pipe 2 10 is installed on the drying frame 9. The other end of the air supply pipe 2 10 is connected to the air pump 7, and the air supply pipe 3 11 is installed on the drying frame 9. The other end of the air supply pipe 3 11 is connected to the filter cylinder 6.

[0022] like Figure 1-Figure 7 As shown, the air flow filtering mechanism is composed of a water tank 4, a water pump 12, a water pipe 13 and a nozzle 14. The water tank 4 is arranged in the air inlet chamber 2. A water inlet pipe 5 is installed on the water tank 4. One end of the water inlet pipe 5 extends to the outside of the shell 1. A solenoid valve 2 is arranged on the water inlet pipe 5. The water tank 4 is connected with the filter cartridge 6. The water pump 12 is installed on the water tank 4. The water inlet on the water pump 12 is connected with the water tank 4. The water pipe 13 is installed on the water pump 12. The nozzle 14 is rotatably installed on the water pipe 13. The number of the nozzles 14 is set to be multiple and is equidistantly vertically distributed. A branch pipe is arranged on the water pipe 13. The nozzle 14 is connected to the branch pipe by a rotating joint. One end of the nozzle 14 extends into the filter cartridge 6 and is rotatably arranged with the filter cartridge 6. A fixed sleeve 21 is installed on the filter cartridge 6. The nozzle 14 passes through the fixed sleeve 21 and is rotatably connected to the fixed sleeve 21. The side of the fixed sleeve 21 facing the inside of the filter cartridge 6 is set to be trumpet-shaped, so that the nozzle 14 can expand the spraying range.

[0023] like Figure 1-Figure 7As shown, a fixed frame 28 is installed on the water tank 4, and a transmission rod 17 is rotatably installed on the fixed frame 28. The top of the transmission rod 17 extends into the gas pipe 10, and the transmission rod 17 is rotatably connected with the gas pipe 10. One end of the transmission rod 17 located in the gas pipe 10 is sleeved with a rotating blade 18. A connecting rod 1 is rotatably installed on the filter cartridge 6, and a connecting rod 2 is rotatably installed on the fixed frame 28. A transmission assembly 19 is provided on the connecting rod 1 and the connecting rod 2. The connecting rod 2 is meshed with the transmission rod 17 through a gear, and the transmission rod 17 drives the connecting rod 2 to rotate. The connecting rod 2 is provided with a bevel gear 1, and the transmission assembly 19 is provided on the connecting rod 1 and the connecting rod 2. A bevel gear 2 is provided on the rod 17, and the bevel gear 1 and the bevel gear 2 are meshingly connected. A transmission component 2 20 is provided on the nozzle 14 and the connecting rod 2, which is used for the connecting rod 2 to drive the nozzle 14 to rotate. The transmission component 1 19 and the transmission component 2 20 are both composed of a synchronous pulley mechanism. The synchronous pulley mechanism adopts the existing technology and structure. The synchronous pulley mechanism is used in this application document to complete the transmission function. In actual use, other transmission mechanisms can be used instead. It is only necessary to ensure that the rotating blades 18 rotate under the drive of the airflow, and the rotational force is transmitted to the nozzle 14 to complete the rotation of the nozzle 14.

[0024] like Figure 4-Figure 5 As shown, a scattering block 22 is rotatably installed on the fixed rod 16, and a connecting rod 23 is installed on the scattering block 22. The connecting rod 23 is connected to the nozzle 14, and is used for the nozzle 14 to drive the scattering block 22 to rotate. The water flow sprayed from the nozzle 14 can be scattered and splashed back by the scattering block 22. A rotating groove is provided on the fixed rod 16, and the scattering block 22 is rotatably connected to the rotating groove. The scattering block 22 is provided with a plurality of irregular strip-shaped protrusions on the side facing the nozzle 14, so that when the nozzle 14 sprays water and contacts one side of the scattering block 22, the water flow can be scattered and splashed back, thereby improving the comprehensiveness of the water flow in the filter cartridge 6.

[0025] like Figure 3 and Figure 7As shown, a drying plate 26 is arranged in the drying frame 9. The drying plate 26 is constructed by the prior art and has the characteristic of absorbing water vapor in the air, and is used to dry the water vapor in the airflow in the air. A heating element 27 is installed on the drying frame 9, and is used to heat the airflow in the space of the drying frame 9. A water pouring pipe is installed on the air delivery pipe 10, and the water pipe is connected with the water tank 4. A solenoid valve 1 is arranged on the water pipe. In the routine maintenance process, the heating element 27 can be started to heat the airflow in the drying frame 9, thereby the drying plate 26 can be dried. 26 is heated to remove moisture thereon so that the drying plate 26 can be restored to ensure the dehumidification effect on the airflow. During the heating process, the moisture becomes hot and becomes water vapor through the air supply pipe three 11 to enter the filter cartridge 6, where it re-condenses into water droplets with the cold and flows back to the water tank 4, and the water droplets formed in the drying frame 9 flow into the air supply pipe two 10. At this time, the solenoid valve one can be opened to return the water flow formed by the water droplets to the water tank 4, thereby completing the drying operation of the drying plate 26 and enabling it to be used for a long time.

[0026] like Figure 4 and Figure 6 As shown, a water return hole is provided on the filter cartridge 6, and the water return hole extends to the water tank 4. A filter frame 24 is installed on the water tank 4, and the water return hole is communicated with the filter frame 24. A collecting frame 25 is provided in the filter frame 24, and one side of the collecting frame 25 extends to the outside of the water tank 4. The collecting frame 25 is connected to the water tank 4 by bolts. The filter frame 24 is arranged obliquely, and a plurality of filter holes are provided on the filter frame 24 for filtering impurities in the water flow, and the filtered impurities enter the collecting frame 25 under the action of the inclined surface on the filter frame 24.

[0027] In this embodiment, when in use, the air pump 7 can be started, and the external airflow is delivered to the installation room through the air inlet cylinder 29, the filter cylinder 6, the air delivery pipe three 11, the drying frame 9, the air delivery pipe two 10 and the air delivery pipe one 8, and the working components of the box-type inverter body are cooled by the airflow, and then discharged through the air outlet frame 3, thereby completing the heat dissipation operation of the box-type inverter body; During the airflow, the filter plate on the air inlet cylinder 29 can be used for preliminary filtration, and then the water pump 12 is started to transport the water flow on the water tank 4 to the water pipe 13, and then the water flow is sprayed into the filter cylinder 6 through the nozzle 14. Under the joint action of the spiral blades 15, the spirally moving airflow in the filter cylinder 6 can be sprayed and filtered to remove dust and impurities in the airflow, completing the secondary filtration of the airflow, and ensuring the purity of the airflow entering the installation room; When the airflow flows in the gas transmission pipe 2 10, the rotating blade 18 can be driven to rotate, thereby driving the transmission rod 17 to rotate, and the connecting rod 1 is driven to rotate under the action of the gear, the connecting rod 2 and the transmission component 1 19, and then the nozzle 14 is driven to rotate through the transmission component 20, so that the nozzle 14 can form a rotating spraying state in the filter cartridge 6, so that the water flow sprayed by the nozzle 14 can form a parabola, expand the spraying range, and improve the filtering effect of impurities in the airflow. In addition, the rotation of the nozzle 14 can drive the scattering block 22 to rotate under the action of the connecting rod 23. Through the action of the scattering block 22, the water flow sprayed by the nozzle 14 can be scattered and irregular backsplashing can be performed, so that the water flow presents The irregular sputtering phenomenon can improve the comprehensiveness of the flow of water in the space of the filter cartridge 6, and further improve the filtering effect of impurities in the air. At the same time, the leakage holes set on the spiral blades 15 can make the water flowing on the spiral blades 15 drip downward, forming a downward flowing rain curtain phenomenon, thereby making the water flow form an irregular flow in the filter cartridge 6, and further improving the filtering effect of impurities in the air. The filtered water will flow back to the water tank 4 through the return hole, and the impurities in the water will be filtered by the filter frame 24 and collected by the collection frame 25. You only need to remove the collection frame 25 from the water tank 4 for cleaning, thereby forming a water flow circulation and saving water resources.

[0028] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A photovoltaic box-type transformer for harsh environments, comprising: A box-type transformer body, wherein a housing (1) is provided on the box-type transformer body for protecting the entire box-type transformer, and an installation chamber is provided on the housing (1) for installing working components of the box-type transformer body, characterized in that: An air intake chamber (2) is provided on the housing (1), and an air intake mechanism is provided in the air intake chamber (2) for conveying external airflow into the installation room to provide heat dissipation for working components on the box-type transformer body; An air flow filtering mechanism is arranged in the air intake chamber (2), and the air flow entering the installation chamber is filtered by spraying water to remove dust and impurities in the air flow in a harsh environment. The air flow filtering mechanism is used in conjunction with the air intake mechanism to ensure that the air flow entering the installation chamber is pure.

2. A photovoltaic box-type transformer for harsh environments according to claim 1, characterized in that: The air intake mechanism is composed of a filter cartridge (6), an air intake cartridge (29), an air pump (7), an air delivery pipe 1 (8), a drying frame (9), an air delivery pipe 2 (10) and an air delivery pipe 3 (11). The filter cartridge (6) is arranged in an air intake chamber (2), the air intake cartridge (29) is mounted on the filter cartridge (6), one end of the air intake cartridge (29) extends to the outside of the housing (1), the air pump (7) is arranged in the air intake chamber (2), the air delivery pipe 1 (8) is mounted on the air pump (7), one end of the air delivery pipe 1 (8) extends to the installation chamber, the drying frame (9) is arranged in the air intake chamber (2), the air delivery pipe 2 (10) is mounted on the drying frame (9), the other end of the air delivery pipe 2 (10) is connected to the air pump (7), the air delivery pipe 3 (11) is mounted on the drying frame (9), and the other end of the air delivery pipe 3 (11) is connected to the filter cartridge (6).

3. A photovoltaic box-type transformer for harsh environments according to claim 2, characterized in that: The airflow filtering mechanism is composed of a water tank (4), a water pump (12), a water pipe (13) and a nozzle (14). The water tank (4) is arranged in the air inlet chamber (2). The water tank (4) is connected to the filter cartridge (6). The water pump (12) is mounted on the water tank (4). The water inlet on the water pump (12) is connected to the water tank (4). The water pipe (13) is mounted on the water pump (12). The nozzle (14) is rotatably mounted on the water pipe (13). One end of the nozzle (14) extends into the filter cartridge (6) and is rotatably arranged with the filter cartridge (6).

4. The photovoltaic box-type transformer for harsh environments according to claim 2, characterized in that: A fixing rod (16) is installed in the filter cartridge (6), and a spiral blade (15) is installed in the filter cartridge (6). The spiral blade (15) is connected to the fixing rod (16). The spiral blade (15) can cause the airflow entering the filter cartridge (6) to flow in a spiral manner, thereby increasing the moving time of the airflow in the filter cartridge (6).

5. The photovoltaic box-type transformer for harsh environments according to claim 3 is characterized in that: A fixing sleeve (21) is mounted on the filter cartridge (6), the nozzle (14) penetrates the fixing sleeve (21) and is rotatably connected to the fixing sleeve (21), and a side of the fixing sleeve (21) facing the inside of the filter cartridge (6) is configured to be trumpet-shaped, so that the nozzle (14) can expand the spraying range.

6. The photovoltaic box-type transformer for harsh environments according to claim 3, characterized in that: A fixed frame (28) is mounted on the water tank (4), a transmission rod (17) is rotatably mounted on the fixed frame (28), a top end of the transmission rod (17) extends into the gas pipe (10), the transmission rod (17) is rotatably connected to the gas pipe (10), one end of the transmission rod (17) located in the gas pipe (10) is sleeved with a rotating blade (18), a connecting rod (1) is rotatably mounted on the filter cartridge (6), a connecting rod (2) is rotatably mounted on the fixed frame (28), a transmission assembly (19) is arranged on the connecting rod (1) and the connecting rod (2), the connecting rod (2) is meshed with the transmission rod (17) through a gear, and is used for the transmission rod (17) to drive the connecting rod (2) to rotate, and a transmission assembly (20) is arranged on the nozzle (14) and the connecting rod (2), and is used for the connecting rod (2) to drive the nozzle (14) to rotate.

7. The photovoltaic box-type transformer for harsh environments according to claim 3, characterized in that: A breaking block (22) is rotatably mounted on the fixed rod (16), and a connecting rod (23) is mounted on the breaking block (22). The connecting rod (23) is connected to the spray head (14) and is used for the spray head (14) to drive the breaking block (22) to rotate. The water flow sprayed from the spray head (14) can be broken up and splashed back by the breaking block (22).

8. The photovoltaic box-type transformer for harsh environments according to claim 1, characterized in that: A drying plate (26) is arranged in the drying frame (9) for drying water vapor in the air flow. A heating element (27) is installed on the drying frame (9) for heating the air flow in the drying frame (9). A water pouring pipe is installed on the second air supply pipe (10). The water pipe is connected to the water tank (4). A solenoid valve 1 is arranged on the water pipe.

9. The photovoltaic box-type transformer for harsh environments according to claim 3, characterized in that: The filter cartridge (6) is provided with a water return hole, the water return hole extending to the water tank (4), a filter frame (24) is mounted on the water tank (4), the water return hole is in communication with the filter frame (24), a collection frame (25) is arranged inside the filter frame (24), one side of the collection frame (25) extends outside the water tank (4), and the collection frame (25) is connected to the water tank (4) by bolts.

10. The photovoltaic box-type transformer for harsh environments according to claim 4, characterized in that: A plurality of water leakage holes are provided on the spiral blade (15), and the plurality of water leakage holes are all arranged in a bucket shape.

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