A power distribution cabinet for photovoltaic power generation

Abstract

The application discloses a power distribution cabinet for photovoltaic power generation and belongs to the technical field of power distribution equipment. The technical scheme comprises a cabinet body, the cabinet body is vertically separated into a main chamber and a side chamber in the cabinet body, a mounting beam and electrical devices are arranged in the main chamber, a copper bar group with multiple lapping positions is connected between the electrical devices, the lapping positions are main high-temperature heating point positions of the equipment, the main chamber and the side chamber form a main heat dissipation channel and a side heat dissipation channel respectively, a swing assembly is arranged on the back side of the mounting beam, an insulating heat-conducting piece is arranged at the end of the swing assembly, and the swing assembly can drive the insulating heat-conducting piece to reciprocally switch between a first heat absorption position of the copper bar lapping position in the main chamber and a second heat dissipation position of the side heat dissipation channel in the side chamber. The application realizes fixed-point heat absorption of the high-temperature lapping position of the copper bar through the swingable insulating heat-conducting piece, cooperates with a double-chamber double-channel heat dissipation structure and a ventilation opening which is opened and closed by a single-source mechanical linkage, realizes a grading heat dissipation mode of normal and regular heat dissipation and high-temperature accurate and efficient heat dissipation, and is suitable for long-term continuous power distribution working conditions of a photovoltaic power generation system.

Description

Technical Field

[0001] This application relates to the technical field of photovoltaic power generation, and in particular to a distribution cabinet for photovoltaic power generation. Background Technology

[0002] Against the backdrop of the global energy transition and the accelerated pursuit of "dual carbon" goals, photovoltaic (PV) power generation has become a core pillar of green energy. As the "smart hub" of PV systems, PV distribution cabinets, with their technological breakthroughs and adaptability to various scenarios, are driving the efficient and large-scale application of clean energy. By integrating high-performance inverters and intelligent control systems, PV distribution cabinets convert the direct current (DC) generated by solar panels into alternating current (AC), seamlessly connecting to the power grid. Their conversion efficiency can reach over 98%, significantly reducing energy loss.

[0003] In related technologies, the overlapping positions between copper busbars in a distribution cabinet are subject to long-term high current conduction during operation, which easily leads to concentrated high temperatures. The contact resistance at the overlapping positions is relatively high, and the heat generation is concentrated. Long-term high-temperature operation can easily cause copper busbar oxidation and further increase the contact resistance, forming a vicious cycle. This not only reduces the working efficiency of the power distribution equipment, but also easily causes the components to age and shorten their service life. In severe cases, it can lead to overheating, burnout, short circuit tripping and other faults, affecting the safe and stable operation of the photovoltaic power distribution system.

[0004] The problem with the relevant technology is that the heat dissipation structure of existing photovoltaic distribution cabinets is mostly a fixed whole-area heat dissipation structure, which mainly relies on fans and air intake louvers to achieve overall convection heat dissipation inside the cabinet. The heat dissipation method is single and poorly targeted, and it cannot provide targeted and efficient heat dissipation for local high-temperature joints or adjacent areas of the copper busbars. It is difficult to adapt to the working conditions of photovoltaic distribution cabinets with high current, high load and long-term continuous operation. Summary of the Invention

[0005] To address the technical problem that existing photovoltaic distribution cabinets cannot efficiently dissipate heat at the copper busbar joints, this application provides a photovoltaic power generation distribution cabinet.

[0006] The photovoltaic power generation distribution cabinet provided in this application adopts the following technical solution:

[0007] A photovoltaic power generation distribution cabinet includes a cabinet body, the interior of which is vertically divided into a main chamber and a side chamber. Multiple mounting beams are arranged within the main chamber, and several electrical components are correspondingly mounted on each mounting beam. Copper busbars connect the electrical components to form conductive circuits. Each copper busbar has multiple overlapping points, each of which is a high-temperature heating point generated by high-current operation. Main heat dissipation channels and side heat dissipation channels are respectively formed from bottom to top within the main chamber and the side chambers.

[0008] A swing assembly is provided on the side of the mounting beam away from the electrical components. The swing assembly has two extreme swing positions: a first position located inside the main chamber and close to the copper busbar assembly, and a second position corresponding to the heat dissipation channel on the side chamber.

[0009] The end of the swing assembly away from the mounting beam is set as the swing end. An insulating and heat-conducting component is fixedly installed on the swing end. When the insulating and heat-conducting component is in the first position, it can cover part of the overlap position or its adjacent area corresponding to the same mounting beam.

[0010] The bottom of the cabinet is equipped with an openable and closable ventilation opening that connects the main chamber and the side chamber.

[0011] Optionally, the cabinet is provided with a vertical partition, which divides the interior of the cabinet into a main chamber and a side chamber;

[0012] The vertical partition plate has a clearance opening that connects the main chamber and the side chamber. The clearance opening is configured to cooperate with the swing assembly to allow the insulating heat-conducting component to swing back and forth between the first position and the second position.

[0013] The ventilation opening is located at the bottom of the vertical partition.

[0014] Optionally, at least one side of the bottom of the cabinet is provided with a louver structure to form an air inlet and connect to the main chamber, and a cooling fan assembly corresponding to the air inlet is installed on the top of the cabinet.

[0015] The cooling fan assembly has multiple suction ports, some of which are connected to the main chamber and others are connected to the side chamber, so that the cooling fan assembly can simultaneously draw air from the main chamber and the side chamber.

[0016] Optionally, multiple mounting beams are arranged horizontally in parallel and spaced intervals inside the main chamber, and each electrical component is assembled on the surface of different mounting beams in layers, so that the copper busbar joints corresponding to each electrical component form a staggered distribution structure. The swing path of the insulating heat-conducting component can at least cover the corresponding joint or its adjacent area.

[0017] Optionally, the copper busbar group includes a horizontal busbar, a main longitudinal busbar, and a branch busbar, and a plurality of the electrical components are correspondingly connected to the main longitudinal busbar and the branch busbar, with the horizontal busbar disposed between the main longitudinal busbar and the branch busbar;

[0018] The horizontal busbar and the vertical busbar overlap in the horizontal plane to form a horizontal overlap position, and some of the insulating heat-conducting components achieve heat conduction and heat exchange by contacting the area above or below the horizontal overlap position.

[0019] Optionally, the insulating and thermally conductive component includes an insulating substrate and a thermally conductive layer composited on the insulating substrate and facing the copper busbar assembly, wherein the thermally conductive layer is a high-temperature resistant insulating and thermally conductive composite material;

[0020] The heat-conducting layer is an elastic structure that can undergo slight elastic deformation when the swinging end swings and presses against it, so as to adaptively fit with the overlapping position or adjacent area of ​​the copper busbar assembly.

[0021] The heat-conducting layer forms a contact surface on the side facing the copper busbar assembly, and the contact surface has a planar structure.

[0022] Optionally, the swing assembly includes a fixed base, a swing arm, and a swing source. The fixed base is installed on the side of the mounting beam away from the electrical components. The swing arm is rotatably mounted on the fixed base, and the end of the swing arm away from the fixed base forms the swing end.

[0023] The swing arm and the fixed base are connected by a driven member at the rotational connection. The swing source includes a driver and a driving member. The driver drives the driving member. A transmission member is installed between the driving member and the driven member. The driver drives the driven member and the swing arm to swing back and forth at a certain angle through the driving member and the transmission member.

[0024] Optionally, a push rod is mounted on the active component, the end of the push rod extends toward the vent, and a cover that can block the vent is hinged at the vent. The end of the push rod and the cover are hinged to form a linkage structure.

[0025] When the driver drives the active component to rotate, it can simultaneously drive the swing arm to swing and the push rod to rotate, so that the ventilation opening can be opened or closed synchronously with the swing arm's swinging motion.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. By setting up a reciprocating swing component and an insulating heat-conducting component, the insulating heat-conducting component swings and fits against the overlapping part of the copper busbar assembly or the adjacent area, achieving precise heat absorption and heat exchange at high-temperature points. This effectively solves the problems of local heat accumulation and uneven heat dissipation at the copper busbar overlapping position, reduces the high-temperature oxidation rate of the copper busbar, and stabilizes the electrical conductivity of the equipment.

[0028] 2. By dividing the cabinet into a main chamber and a side chamber, a main heat dissipation channel and a side heat dissipation channel are formed respectively. With the louvered air intake at the bottom of the cabinet and the dual exhaust port cooling fan group at the top, independent airflow and heat dissipation of the two chambers can be achieved. Under normal conditions, the main heat dissipation channel of the main chamber is used to complete the normal heat dissipation of the equipment. Under high temperature conditions, low temperature fresh air can be introduced through the ventilation port at the bottom of the vertical partition to form a side heat dissipation channel in the side chamber. The low temperature air that has not been heat exchanged can be used to quickly cool down the insulating heat-conducting components, thereby improving the heat dissipation efficiency.

[0029] 3. By using a set of swing sources to synchronously drive the swing arm to swing and the ventilation opening and closing, a mechanical linkage effect is achieved where the ventilation opening is synchronous when the insulating heat-conducting component swings to the side chamber for heat dissipation, and the ventilation opening is synchronously closed after the heat-conducting component resets. The heat dissipation action is matched with the high-temperature heat dissipation conditions, reducing equipment operation and maintenance costs. Attached Figure Description

[0030] Figure 1 This is a frontal cross-sectional structural diagram of an embodiment of this application.

[0031] Figure 2 This is a side view cross-sectional structural diagram of an embodiment of this application.

[0032] Figure 3 This application Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0033] Figure 4 This application Figure 2 Enlarged schematic diagram of the structure at point B.

[0034] Reference numerals: 1. Cabinet; 101. Main chamber; 102. Side chamber; 2. Mounting beam; 3. Copper busbar assembly; 301. Overlap joint; 31. Horizontal busbar; 32. Main longitudinal busbar; 33. Branch busbar; 4. Swing assembly; 41. Fixed base; 42. Swing arm; 43. Swing source; 431. Driver; 432. Driving component; 44. Driven component; 45. Transmission component; 5. Insulating and heat-conducting component; 51. Insulating substrate; 52. Heat-conducting layer; 6. Vertical partition; 601. Clearance opening; 602. Ventilation opening; 7. Louver structure; 8. Cooling fan assembly; 9. Push rod; 10. Cover. Detailed Implementation

[0035] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0036] This application discloses a power distribution cabinet for photovoltaic power generation. (Refer to...) Figure 1 A photovoltaic power generation distribution cabinet includes a cabinet body 1. The cabinet body 1 is vertically divided into a main chamber 101 and a side chamber 102 by vertical partitions 6. The main chamber 101 is the main mounting cavity for electrical components and copper busbar structures, while the side chamber 102 is a dedicated heat dissipation cavity. Multiple sets of mounting beams 2 are arranged horizontally and at intervals inside the main chamber 101. Several electrical components are layered on the surface of each mounting beam 2, and the electrical components are electrically connected to each other by copper busbar groups 3, thus forming a complete conductive circuit inside the distribution cabinet.

[0037] Specifically, the copper busbar group 3 includes a horizontal busbar 31, a main longitudinal busbar 32, and a branch busbar 33. The main longitudinal busbar 32 and the branch busbar 33 are connected to each electrical component. The horizontal busbar 31 is installed between the main longitudinal busbar 32 and the branch busbar 33 to achieve a horizontal conductive connection. The horizontal busbar 31 and the longitudinal busbar overlap in the horizontal plane to form multiple overlap positions 301. The overlap positions 301 are the main high-temperature heat-generating points under high current operation of the equipment, and there is a problem of serious local heat accumulation.

[0038] Reference Figure 1 and Figure 2 The main chamber 101 forms a main heat dissipation channel that flows from bottom to top, and the side chamber 102 forms a side heat dissipation channel that flows from bottom to top. The two heat dissipation channels work together to achieve graded heat dissipation inside the cabinet 1. At least one side of the bottom of the cabinet 1 is equipped with a louvered structure 7. Depending on the actual assembly and heat dissipation requirements, the louvered structure 7 can be opened on one or both sides of the bottom of the cabinet 1 to ensure sufficient air intake area and uniform air intake. The louvered structure 7 forms the bottom air intake of the cabinet 1 and is connected to the main chamber 101. The top of the cabinet 1 is equipped with a cooling fan group 8 corresponding to the bottom air intake position. The cooling fan group 8 is equipped with multiple independent suction ports, some of which are connected to the main chamber 101 and others are connected to the side chamber 102. The cooling fan group 8 is continuously running throughout the operation, simultaneously exhausting and guiding air into the main chamber 101 and the side chamber 102, so that the outside cold air continuously flows from bottom to top through the cabinet cavity.

[0039] To address the issue of localized high-temperature heat accumulation at the overlap position 301 of the copper busbar assembly 3, multiple sets of swing components 4 can be arranged on the back side of the mounting beam 2 corresponding to the heat-generating points, based on the distribution of heat-generating points within the cabinet. The number of swing components 4 can be adapted to the power of the distribution cabinet and the number of heat-generating points on the copper busbar. This multi-set, independently arranged structure can specifically address localized high-temperature overlap positions 301 at different heights and locations, achieving synchronous, fixed-point heat dissipation at multiple points, adapting to the staggered distribution of heat-generating points within the cabinet. Each swing component 4 includes a fixed base 41, a swing arm 42, and a swing source 43. The fixed base 41 is fixedly installed in the non-conductive area on the back side of the mounting beam 2. The swing arm 42 is rotatably mounted on the fixed base 41, with the end of the swing arm 42 furthest from the fixed base 41 forming the swing end, which is fixedly equipped with an insulating heat-conducting component 5.

[0040] A driven member 44 is installed at the rotatable connection between the swing arm 42 and the fixed base 41. In this embodiment, the driven member 44 is specifically a driven sprocket. The swing source 43 includes a driver 431 and a driving member 432. The driver 431 can be a stepper motor, which has the characteristics of precise angle forward and reverse rotation and stable start and stop, and is suitable for reciprocating swing conditions. In other embodiments, the driver 431 can also be a swing cylinder, servo motor or other driving components that can output angle reciprocating rotation. The driving member 432 is specifically a driving sprocket. The output shaft of the driver 431 is coaxially fixedly connected to the driving sprocket. A transmission member 45 is installed between the driving member 432 and the driven member 44. The transmission member 45 is specifically a transmission chain. The driving sprocket, chain and driven sprocket cooperate to form a sprocket and chain transmission structure, which has high transmission accuracy, strong load capacity and is not easy to slip, and is suitable for the reciprocating swing working requirements in the cabinet.

[0041] During operation, the driver 431 drives the active sprocket to rotate forward and backward at a fixed angle, and drives the driven sprocket to rotate synchronously through the chain, thereby driving the swing arm 42 to swing back and forth around the fixed seat 41 at a fixed angle, so as to achieve precise and stable switching of the swing end position.

[0042] Reference Figure 2 and Figure 4 The swing component 4 has two extreme swing positions, namely the first position and the second position. The first position is located inside the main chamber 101 and close to the copper busbar group 3. When the insulating heat-conducting component 5 is in the first position, it can cover part of the overlap position 301 or its adjacent area at the corresponding mounting beam 2 to achieve close-fitting heat absorption. The second position is set in the side heat dissipation channel of the side chamber 102. When the insulating heat-conducting component 5 swings to the second position, it can completely enter the side heat dissipation channel for concentrated heat dissipation.

[0043] The insulating and heat-conducting component 5 is a high-temperature resistant elastic composite structure, specifically including an insulating substrate 51 and a heat-conducting layer 52 composited on the side of the insulating substrate 51 facing the copper busbar group 3. The insulating substrate 51 is made of high-strength, high-temperature resistant silicone rubber, which has excellent electrical insulation performance and structural toughness. The heat-conducting layer 52 is made of a high-temperature resistant insulating and heat-conducting composite material. Specifically, the substrate is made of phenyl silicone rubber, and the interior is uniformly filled with high-insulation and high-thermal-conductivity hexagonal boron nitride powder as a heat-conducting filler. It is free of metallic conductive impurities, which greatly improves the heat conduction efficiency while ensuring the insulation level.

[0044] The heat-conducting layer 52 has an overall elastic structure. When the swing arm 42 drives the insulating heat-conducting component 5 to press against the overlapping position 301, it can undergo slight elastic deformation, adaptively compensating for the assembly gap and height deviation of the overlapping position 301, ensuring a tight fit between the contact surfaces, effectively reducing interface thermal resistance, and improving heat absorption efficiency. The side of the heat-conducting layer 52 facing the copper busbar group 3 is set as a planar contact surface, which can adapt to the heat exchange requirements of various overlapping positions 301 and adjacent areas. For busbar structures with horizontal overlapping, indirect heat conduction and cooling can be achieved by fitting the upper and lower adjacent areas, making it more adaptable. At the same time, this composite material can withstand high temperatures of 180℃ for a long time and short-term impact temperatures of 220℃. It is not easy to carbonize, age, or deform, making it suitable for the continuous heating conditions of high current in the distribution cabinet.

[0045] Reference Figure 2 and Figure 4 The upper part of the vertical partition 6 has an opening 601, which corresponds to the swing assembly 4 and allows the insulating heat-conducting component 5 and the swing arm 42 to swing back and forth between the first position and the second position to ensure smooth switching of work positions. The bottom of the vertical partition 6 has an openable and closable ventilation opening 602, which connects the main chamber 101 and the side chamber 102 to supplement the side chamber 102 with low-temperature fresh air.

[0046] Reference Figure 2 and Figure 3 A push rod 9 is coaxially fixedly mounted on the outer side of the active component 432 (active sprocket). The push rod 9 is made of hard insulating plastic material, which has the characteristics of being lightweight, insulating and corrosion resistant. The end of the push rod 9 extends toward the ventilation opening 602 at the bottom of the vertical partition 6. A cover 10 that can completely block the ventilation opening 602 is hinged at the position of the ventilation opening 602. The cover 10 is an insulating high-temperature resistant cover plate. Its shape matches the ventilation opening 602 to achieve complete blockage. The end of the push rod 9 is hinged to the side wall of the cover 10 to form a sprocket linkage integrated opening and closing structure. The whole has no independent electrical control components and relies entirely on mechanical transmission to achieve synchronous action.

[0047] When the equipment is in normal operation, the temperature rise of the copper busbar group 3 is low, and there is no need to enhance heat dissipation. At this time, the swing component 4 is in the initial position, the insulating heat-conducting component 5 is inside the main chamber 101, the cover 10 completely blocks the ventilation opening 602, the side chamber 102 has no fresh air supply, and the cold air drawn by the cooling fan group 8 enters the main chamber 101. The conventional convection heat dissipation inside the cabinet 1 is completed through the main heat dissipation channel, which meets the basic heat dissipation requirements of the equipment. At the same time, it can avoid problems such as cold and hot air flow interference, dust accumulation inside the cabinet, and moisture intrusion under normal conditions.

[0048] When the distribution cabinet is operating at high current and local high temperature accumulation occurs at the copper busbar group 3 overlap position 301, the driver 431 starts and drives the active component 432 to rotate. On the one hand, the drive component 45 and the driven component 44 drive the swing arm 42 to swing, so that the insulating heat-conducting component 5 comes into contact with the high temperature overlap position 301 or its adjacent area to quickly absorb heat. Then, it swings through the clearance opening 601 and enters the side heat dissipation channel inside the side cavity 102. On the other hand, the active component 432 drives the push rod 9 to rotate. The push rod 9 pushes and pulls the cover 10 to flip, so that the ventilation opening 602 opens simultaneously. The low temperature cold air at the bottom of the cabinet 1 that has not been heat exchanged directly enters the side cavity 102 through the ventilation opening 602. It works with the suction port of the heat dissipation fan group 8 corresponding to the side cavity 102 to form a dedicated low temperature convection air channel to quickly and forcibly dissipate heat from the insulating heat-conducting component 5.

[0049] When the temperature at the overlap position 301 returns to the normal range, the driver 431 rotates in the reverse direction at a fixed angle to reset. Through the sprocket and chain transmission structure, it drives the swing arm 42 to swing in the reverse direction to reset, allowing the insulating heat-conducting component 5 to smoothly return to the first position of the main chamber 101. At the same time, the active sprocket synchronously drives the push rod 9 to rotate in the reverse direction, pushing and pulling the cover 10 to re-attach and seal the ventilation opening 602. The dedicated heat dissipation air duct of the side chamber 102 is closed, and the equipment returns to the normal heat dissipation mode. This invention achieves synchronous linkage between heat conduction and heat exchange and the opening and closing of the air vents through a single-source mechanical linkage structure of sprocket and chain transmission. The transmission is stable, the failure rate is low, no additional electrical control components are required, and the structure is simple and reliable. It realizes intelligent switching between conventional full-area heat dissipation and high-temperature targeted enhanced heat dissipation, effectively solving the technical pain points of local heat accumulation on copper busbars, inefficient heat dissipation, and poor targeting in traditional power distribution cabinets.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A photovoltaic power generation distribution cabinet, characterized in that, The device includes a cabinet, which is vertically divided into a main chamber and a side chamber. The main chamber contains multiple mounting beams, and several electrical components are mounted on each mounting beam. The electrical components are connected by copper busbars to form a conductive circuit. The copper busbars have multiple overlapping positions, each of which is a high-temperature heat-generating point generated by high-current operation. The main chamber and the side chambers respectively form a main heat dissipation channel and a side heat dissipation channel from bottom to top. A swing assembly is provided on the side of the mounting beam away from the electrical components. The swing assembly has two extreme swing positions: a first position located inside the main chamber and close to the copper busbar assembly, and a second position corresponding to the heat dissipation channel on the side chamber. The end of the swing assembly away from the mounting beam is set as the swing end. An insulating and heat-conducting component is fixedly installed on the swing end. When the insulating and heat-conducting component is in the first position, it can cover part of the overlap position or its adjacent area corresponding to the same mounting beam. The bottom of the cabinet is equipped with an openable and closable ventilation opening that connects the main chamber and the side chamber.

2. The photovoltaic power generation distribution cabinet according to claim 1, characterized in that: The cabinet is equipped with vertical partitions that divide the interior of the cabinet into a main chamber and a side chamber. The vertical partition plate has a clearance opening that connects the main chamber and the side chamber. The clearance opening is configured to cooperate with the swing assembly to allow the insulating heat-conducting component to swing back and forth between the first position and the second position. The ventilation opening is located at the bottom of the vertical partition.

3. The photovoltaic power generation distribution cabinet according to claim 1, characterized in that: At least one side of the bottom of the cabinet is provided with a louver structure to form an air inlet and connect to the main chamber. The top of the cabinet is equipped with a cooling fan group corresponding to the air inlet above and below. The cooling fan assembly has multiple suction ports, some of which are connected to the main chamber and others are connected to the side chamber, so that the cooling fan assembly can simultaneously draw air from the main chamber and the side chamber.

4. The photovoltaic power generation distribution cabinet according to claim 1, characterized in that: Multiple mounting beams are arranged horizontally in parallel and spaced intervals inside the main chamber. Each electrical component is assembled on the surface of a different mounting beam in a layered manner, so that the copper busbar joints of each electrical component form a staggered distribution structure. The swing path of the insulating heat-conducting component can at least cover the corresponding joint or its adjacent area.

5. The photovoltaic power generation distribution cabinet according to claim 1, characterized in that: The copper busbar group includes a horizontal busbar, a main longitudinal busbar, and a branch busbar. Several electrical components are correspondingly connected to the main longitudinal busbar and the branch busbar. The horizontal busbar is disposed between the main longitudinal busbar and the branch busbar. The horizontal busbar and the vertical busbar overlap in the horizontal plane to form a horizontal overlap position, and some of the insulating heat-conducting components achieve heat conduction and heat exchange by contacting the area above or below the horizontal overlap position.

6. The photovoltaic power generation distribution cabinet according to claim 1, characterized in that: The insulating and thermally conductive component includes an insulating substrate and a thermally conductive layer composited on the insulating substrate and facing the copper busbar assembly. The thermally conductive layer is a high-temperature resistant insulating and thermally conductive composite material. The heat-conducting layer is an elastic structure that can undergo slight elastic deformation when the swinging end swings and presses against it, so as to adaptively fit with the overlapping position or adjacent area of ​​the copper busbar assembly. The heat-conducting layer forms a contact surface on the side facing the copper busbar assembly, and the contact surface has a planar structure.

7. The photovoltaic power generation distribution cabinet according to claim 1, characterized in that: The swing assembly includes a fixed base, a swing arm, and a swing source. The fixed base is installed on the side of the mounting beam away from the electrical components. The swing arm is rotatably mounted on the fixed base, and the end of the swing arm away from the fixed base forms the swing end. The swing arm and the fixed base are connected by a driven member at the rotational connection. The swing source includes a driver and a driving member. The driver drives the driving member. A transmission member is installed between the driving member and the driven member. The driver drives the driven member and the swing arm to swing back and forth at a certain angle through the driving member and the transmission member.

8. The photovoltaic power generation distribution cabinet according to claim 7, characterized in that: The active component is equipped with a push rod, the end of which extends toward the vent, and a cover that can seal the vent is hinged at the vent. The end of the push rod and the cover are hinged to form a linkage structure. When the driver drives the active component to rotate, it can simultaneously drive the swing arm to swing and the push rod to rotate, so that the ventilation opening can be opened or closed synchronously with the swing arm's swinging motion.

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