User-side distributed fully immersed liquid-cooled micro inverter and its application

Abstract

This invention relates to the field of inverter technology, specifically to a user-side distributed fully immersion liquid-cooled micro-inverter and its application. It includes a housing for mounting the main inverter components and a cover plate for sealing the opening of the housing. The housing has an outlet pipe and an inlet pipe at its upper and lower ends, respectively. A speed control device is installed inside the inlet pipe. Fluid turbulence devices are installed on both side walls inside the housing, and heat dissipation devices are installed on both side walls outside the housing. This invention effectively reduces the inverter's operating temperature through full immersion liquid cooling. Simultaneously, the synergistic effect of the speed control device, fluid turbulence device, and heat dissipation device allows for real-time adjustment of the coolant flow rate and heat dissipation effect based on the temperature of the main inverter components.

Description

Technical Field

[0001] This invention relates to the field of inverter technology, specifically to a user-side distributed fully immersed liquid-cooled micro inverter and its applications. Background Technology

[0002] An inverter is a converter that transforms direct current (DC) power into alternating current (AC) power with fixed frequency and voltage or adjustable frequency and voltage. It consists of an inverter bridge, control logic, and filter circuits.

[0003] A photovoltaic (PV) power generation system, or simply PV, is a power generation system that uses the photovoltaic effect of photovoltaic cells to directly convert solar radiation energy into electrical energy. It consists of solar cell modules, controllers, energy storage batteries, DC or AC inverters, and other components.

[0004] Patent application CN202421165906.4 discloses a distributed photovoltaic inverter, including an inverter body. The surface of the inverter body has heat dissipation holes, and the inner surface of the inverter body is provided with a heat dissipation device. The heat dissipation device includes a heat sink frame, which is fixedly connected to the inner surface of the inverter body. Two sliding grooves are formed on the inner surface of the heat sink frame, and cooling fans are slidably connected to the inner surfaces of the two sliding grooves. Two rotating blocks are fixedly connected to the surface of the heat sink frame, and a rotating rod is rotatably connected to one side of the two rotating blocks that are close to each other. A baffle is fixed to the arc surface of the rotating rod, and two fixing rods are fixedly connected to the surface of the heat sink frame. This invention solves the problem of excessively high temperatures within the inverter body, which reduces the lifespan of electronic components and makes them prone to failure.

[0005] Current mainstream solutions generally use air cooling or natural cooling to dissipate heat from inverters. However, these cooling methods are not effective under high temperature or high load conditions, which can easily lead to excessively high internal temperatures of the inverter, thus affecting its performance and lifespan. In addition, the operating temperature of the main inverter components cannot be kept constant, and existing cooling methods cannot adjust the heat dissipation effect in real time according to the temperature changes of the main inverter components. In the long run, this will lead to unstable performance of the inverter components.

[0006] In view of this, we propose a user-side distributed fully immersed liquid-cooled micro-inverter and its application. Summary of the Invention

[0007] To overcome the deficiencies in the prior art, the present invention aims to provide a user-side distributed fully immersion liquid-cooled micro inverter and its application. By using fully immersion liquid cooling to cool the main components of the inverter, and through the synergistic effect of the speed control device, the flow rate and heat dissipation effect of the coolant can be adjusted in real time according to the temperature of the main components of the inverter, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A user-side distributed fully immersed liquid-cooled micro inverter includes a housing for mounting the main inverter components and a cover for sealing the opening of the housing. The housing has an outlet pipe and an inlet pipe at its upper and lower ends, respectively. A speed regulating device is installed in the inlet pipe. Fluid turbulence devices are installed on both sides of the housing. Heat dissipation devices are installed on both sides of the housing. The speed regulating device includes a fixed frame fixed inside the liquid inlet pipe, a sliding frame slidably connected to the fixed frame, and a spiral spring plate installed between the fixed frame and the sliding frame. A bracket is welded and fixed to the top of the sliding frame, and racks are provided on both sides of the top of the bracket. A threaded rod is rotatably connected to one end of the fixed frame, and the threaded rod is threadedly connected to the sliding frame. A motor is installed on the outer wall of the liquid inlet pipe for driving the sliding frame to rise and fall. The turbulence device includes several turbulence plates hinged to the inner side wall of the outer shell and a first hinge line connecting each turbulence plate. A first gear is provided on the hinge shaft of the turbulence plate located on the bottom side. The first gear meshes with the rack on the corresponding side. A second gear is provided after the end of the hinge shaft of the turbulence plate located on the bottom side extends out of the outer shell. The heat dissipation device includes several heat dissipation fins hinged to the outer wall of the outer shell and a second hinge line connecting each heat dissipation fin. A third gear is provided at the end of the hinge shaft of the heat dissipation fin on the bottom side after it extends out of the outer shell. The third gear meshes with the second gear on the corresponding side.

[0009] This design takes into account the fact that traditional air cooling or natural cooling methods are not effective for heat dissipation of inverters. The main inverter components are installed in a sealed cavity formed by the outer casing and cover plate. An external liquid cooling circulation system delivers coolant from the inlet pipe to the outlet pipe, forming a circulation that fully immerses the main inverter components in the coolant for liquid cooling. The speed control device slides through the sliding frame, adjusting the distance between it and the fixed frame, controlling the extension and retraction of the spiral spring, thereby controlling the coolant flow rate and making real-time adjustments based on the temperature of the inverter's main components. When the sliding frame slides, the turbulence device drives the turbulence plate to rotate through the meshing rack and the first gear, which disturbs the coolant and increases its contact with the main components of the inverter. As the frame slides, the smaller the angle between the turbulence plate and the horizontal plane, the greater the disturbance effect. When the spoiler rotates, the meshing third gear and the second gear drive the heat dissipation fins to rotate. The smaller the angle between the spoiler and the horizontal plane, the smaller the angle between the heat dissipation fins and the horizontal plane, and the better the heat dissipation effect.

[0010] As a further improvement to this technical solution, a mounting bracket for installing the main components of the inverter and several corrugated guide plates are welded and fixed on the back plate inside the housing. A flow divider block is welded and fixed inside the housing near the liquid inlet pipe. A temperature monitor is installed inside the housing.

[0011] This setup allows for the secure mounting of the inverter's main components via a mounting bracket. The corrugated baffle guides the coolant entering the housing, ensuring more even contact with the inverter's main components. The shunt block distributes the incoming coolant, preventing excessive or insufficient coolant flow in certain areas. The temperature monitor tracks the temperature of the inverter's main components in real time, allowing for timely adjustments to the cooling system based on the temperature conditions.

[0012] As a further improvement to this technical solution, the cover plate is fixed to the outer shell by several fastening bolts, a sealing ring is provided between the cover plate and the outer shell, and the liquid inlet pipe and the liquid outlet pipe are connected to the external liquid cooling circulation heat dissipation system through conduits.

[0013] This setup securely fixes the cover plate to the housing with fastening bolts to ensure airtightness and prevent coolant leakage. The sealing ring further enhances the sealing effect. The inlet and outlet pipes are connected to the external liquid cooling circulation system through conduits, enabling the circulation of coolant and continuously cooling the main components of the inverter.

[0014] As a further improvement to this technical solution, a worm gear is welded and fixed to the bottom end of the threaded rod, and a worm that meshes with the worm gear is rotatably connected inside the side wall of the liquid inlet pipe.

[0015] This setting, through the transmission method of worm gears, can more precisely control the rotation of the threaded rod, thereby accurately adjusting the position of the sliding bracket and achieving precise control of the coolant flow rate.

[0016] As a further improvement to this technical solution, the output shaft of the motor is coaxially connected to the worm gear, and several sliding rods are welded and fixed to the top end of the fixing frame.

[0017] As a further improvement to this technical solution, a threaded hole adapted to the threaded rod is provided on one side of the sliding frame, and a plurality of sliding holes corresponding one-to-one with the position of the sliding rod and adapted to the size are provided on the sliding frame.

[0018] These two features include a motor that powers the worm gear rotation, and a threaded hole and threaded rod matching design that ensures the sliding bracket can slide smoothly and accurately along the rod when the threaded rod rotates. The sliding hole further restricts the sliding direction of the sliding bracket. When the motor starts, it drives the worm gear to rotate, which in turn drives the worm wheel and threaded rod to rotate, thus causing the sliding bracket to slide on the rod. By adjusting the distance between the sliding bracket and the fixed bracket, the extension and retraction of the spiral spring can be controlled, thereby achieving precise control of the coolant flow rate.

[0019] As a further improvement to this technical solution, several triangular blocks are welded and fixed on the outer side wall of the spoiler, and a first groove adapted to the size of the spoiler is opened on the inner side wall of the outer shell.

[0020] This design, by welding several triangular blocks to the outer wall of the spoiler, can further enhance the disturbance effect on the coolant, making the contact between the coolant and the main components of the inverter more sufficient and improving the heat dissipation efficiency; while the first groove on the inner wall of the housing, which is adapted to the size of the spoiler, not only provides space for the rotation of the spoiler, but also plays a certain role in limiting the spoiler and ensuring the stability of the spoiler's rotation.

[0021] As a further improvement to this technical solution, the heat dissipation fins are made of aluminum alloy, and a second groove adapted to the size of the heat dissipation fins is provided on the outer side wall of the outer shell.

[0022] The heat dissipation fins are made of aluminum alloy, which utilizes the excellent thermal conductivity of aluminum alloy to quickly dissipate heat and improve heat dissipation efficiency. A second groove is opened on the outer wall of the shell to match the size of the heat dissipation fins, providing space for the rotation of the heat dissipation fins and also playing a certain limiting role in the heat dissipation fins to ensure the stability of the rotation of the heat dissipation fins.

[0023] As a further improvement to this technical solution, when the sliding frame slides to the top, both the baffle and the heat dissipation fins rotate to a horizontal state; when the sliding frame slides to the bottom, the spiral springs overlap to form a sheet-like blockage of the liquid inlet pipe, and both the baffle and the heat dissipation fins rotate to a vertical state.

[0024] This setting achieves comprehensive and real-time control of coolant flow rate, disturbance effect, and heat dissipation effect by precisely controlling the up and down sliding position of the sliding bracket. When the sliding bracket is at its uppermost position, both the baffle and the heat dissipation fins are horizontal, and the coolant flow rate is relatively fast to meet the heat dissipation requirements of the inverter's main components under normal operating conditions. At the same time, the horizontal baffle has a large disturbance effect on the coolant, and the heat dissipation effect of the heat dissipation fins is also at its best. When the sliding bracket slides to its lowermost position, the spiral springs overlap to block the inlet pipe, effectively slowing down the coolant flow rate. This can prevent energy waste caused by excessively fast coolant flow rate when the inverter's main component temperature is low or the load is small.

[0025] This user-side distributed fully immersed liquid-cooled microinverter is used in small-capacity distributed photovoltaic systems on the rooftops of industrial and commercial buildings.

[0026] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. The user-side distributed fully immersed liquid-cooled micro inverter and its application, through the method of fully immersing the main inverter components in the coolant, can more directly and efficiently remove the heat generated by the main inverter components, greatly improve the heat dissipation efficiency, and effectively avoid the problems of inverter performance degradation and shortened lifespan caused by high temperature.

[0027] 2. This user-side distributed fully immersed liquid-cooled micro-inverter and its application, through the coordinated action of a speed control device, a flow-dissipating device, and a heat dissipation device, achieves the function of real-time adjustment of coolant flow rate and heat dissipation effect based on the temperature of the inverter's main components. The speed control device, through worm gear transmission, precisely controls the position of the sliding frame, thereby adjusting the extension and retraction of the spiral spring to achieve precise control of the coolant flow rate. When the sliding frame slides, the flow-dissipating device drives the flow-dissipating plate to rotate, disturbing the coolant, increasing its contact area with the inverter's main components, and improving heat dissipation efficiency. The disturbance effect changes with the angle between the flow-dissipating plate and the horizontal plane. The heat dissipation device, through meshing gears, drives the heat dissipation fins to rotate, causing the angle between the heat dissipation fins and the horizontal plane to change with the change of the flow-dissipating plate, thereby optimizing the heat dissipation effect. Attached Figure Description

[0028] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a cross-sectional view of the overall structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged view of the structure of A in the middle; Figure 4 For the present invention Figure 2 Enlarged view of the structure of B in the middle; Figure 5 This is an exploded view of the overall structure of the present invention; Figure 6 This is a schematic diagram of the speed regulating device of the present invention; Figure 7 This is an exploded view of the speed regulating device structure of the present invention; Figure 8 This is a schematic diagram of the turbulence-disrupting device of the present invention; Figure 9 This is a schematic diagram of the heat dissipation device structure of the present invention; The meanings of the labels in the diagram are as follows: 100. Outer casing; 110. Inlet pipe; 120. Outlet pipe; 130. Mounting bracket; 140. Corrugated guide vane; 150. Diverter block; 200. Cover plate; 210. Fastening bolts; 300. Speed ​​regulating device; 310. Fixing frame; 320. Slide rod; 330. Sliding frame; 331. Threaded hole; 332. Sliding hole; 340. Helical spring; 350. Threaded rod; 351. Worm gear; 360. Worm; 370. Bracket; 380. Rack; 390. Motor; 400. Spoiler device; 410. Spoiler plate; 411. Triangular block; 420. First gear; 430. Second gear; 440. First hinge line; 500, Heat dissipation device; 510, Heat dissipation fins; 520, Third gear; 530, Second hinge line. Detailed Implementation

[0030] The details of the present invention can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on the invention, and these should all be considered to fall within the scope of the invention. The terms "installation" and "connection" should be interpreted broadly, referring to direct connection or indirect connection through an intermediate medium.

[0031] The terms "central axis," "vertical," "horizontal," "front," "rear," "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer" used herein to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of the invention, "a number" means two or more, unless otherwise explicitly specified.

[0032] Please see Figures 1-5 As shown, the present invention provides a technical solution. User-side distributed fully immersed liquid-cooled micro inverters are used in small-capacity distributed photovoltaic systems on the rooftops of industrial and commercial buildings. They include a housing 100 for installing the main inverter components and a cover plate 200 for sealing the opening of the housing 100. The housing 100 has an outlet pipe 120 and an inlet pipe 110 at its upper and lower ends, respectively. A speed control device 300 is installed inside the inlet pipe 110. Fluid turbulence devices 400 are installed on both side walls inside the housing 100, and heat dissipation devices 500 are installed on both side walls outside the housing 100.

[0033] Considering that air cooling is insufficient to meet the heat dissipation requirements of the inverter's main components in high-temperature environments, the outer casing 100 and the cover plate 200 are designed to form a sealed cavity. The inverter's main components are installed inside the sealed cavity, and an external liquid cooling circulation system is used to circulate the coolant from the inlet pipe 110 to the outlet pipe 120, so that the main components of the inverter are completely immersed in the coolant. This fully immersed liquid cooling method can more directly and efficiently remove the heat generated by the main components of the inverter.

[0034] For details, please refer to Figure 2 As shown, a mounting bracket 130 for mounting the main inverter components and several corrugated guide plates 140 are welded and fixed to the back plate inside the housing 100. A flow divider 150 is welded and fixed inside the housing 100 near the inlet pipe 110. A temperature monitor is installed inside the housing 100. The mounting bracket 130 provides a stable mounting position for the main inverter components. The design of the corrugated guide plates 140 guides the flow direction of the coolant when it enters the housing 100 from the inlet pipe 110, making it more evenly distributed in the internal space of the housing 100, thereby making full contact with the main inverter components and improving the heat dissipation effect. The flow divider 150 can reasonably distribute the coolant entering the housing 100. The temperature monitor monitors the temperature of the main inverter components in real time and feeds the temperature information back to the control system so that the heat dissipation strategy can be adjusted in time according to the actual situation to ensure that the main inverter components are always within a suitable operating temperature range.

[0035] For further details, please refer to Figure 5 As shown, the cover plate 200 is fixed to the outer casing 100 by several fastening bolts 210. A sealing ring is provided between the cover plate 200 and the outer casing 100. The liquid inlet pipe 110 and the liquid outlet pipe 120 are connected to the external liquid cooling circulation heat dissipation system through conduits. The fastening bolts 210 ensure the stability of the connection between the cover plate 200 and the outer casing 100, while the sealing ring further enhances the sealing performance, effectively preventing coolant leakage and ensuring the normal operation of the entire liquid cooling system. The liquid inlet pipe 110 and the liquid outlet pipe 120 are connected to the external liquid cooling circulation heat dissipation system through conduits, forming a complete coolant circulation channel, which allows the coolant to continuously flow between the inside of the outer casing 100 and the external liquid cooling circulation heat dissipation system, continuously cooling the main components of the inverter.

[0036] For details, please refer to Figure 6 and Figure 7 As shown, the speed regulating device 300 includes a fixed frame 310 fixed inside the inlet pipe 110, a sliding frame 330 slidably connected to the fixed frame 310, and a spiral spring 340 installed between the fixed frame 310 and the sliding frame 330. A bracket 370 is welded and fixed to the top of the sliding frame 330, and racks 380 are provided on both sides of the top of the bracket 370. A threaded rod 350 is rotatably connected to one end of the fixed frame 310. The threaded rod 350 is threadedly connected to the sliding frame 330. A motor 390 is installed on the outer wall of the inlet pipe 110 to drive the sliding frame 330 to rise and fall. The distance between the sliding frame 330 and the fixed frame 310 is adjusted by rotating the threaded rod 350, thereby adjusting the extension and retraction of the spiral spring 340, thereby changing the flow cross-section of the coolant in the inlet pipe 110 and realizing the regulation of the coolant flow rate. When the sliding frame 330 moves closer to the fixed frame 310, the spiral spring 340 is compressed, the flow cross section decreases, and the coolant flow rate slows down; when the sliding frame 330 moves away from the fixed frame 310, the spiral spring 340 extends, the flow cross section increases, and the coolant flow rate speeds up.

[0037] In addition, please see Figure 7 As shown, a worm gear 351 is welded and fixed to the bottom end of the threaded rod 350. A worm 360 that meshes with the worm gear 351 is rotatably connected inside the side wall of the liquid inlet pipe 110. Through the transmission method of the worm gear 351 and the worm 360, the rotation angle and number of turns of the threaded rod 350 can be controlled more precisely. Since the threaded rod 350 is threadedly connected to the sliding frame 330, the position of the sliding frame 330 on the slide rod 320 can be precisely adjusted to achieve precise control of the coolant flow rate. When the worm gear 360 rotates, it drives the worm wheel 351 to rotate, and the worm wheel 351 then drives the threaded rod 350 to rotate. The rotation of the threaded rod 350 causes the sliding frame 330 to move linearly along the sliding rod 320, thereby changing the extension and retraction state of the spiral spring 340 and achieving the purpose of regulating the coolant flow rate.

[0038] Furthermore, the output shaft of the motor 390 is coaxially connected to the worm gear 360, and the motor 390 provides power for the rotation of the worm gear 360. Several sliding rods 320 are welded and fixed to the top end of the fixed frame 310, and the sliding rods 320 limit the sliding of the sliding frame 330.

[0039] Specifically, the sliding frame 330 has a threaded hole 331 on one side that matches the threaded rod 350. The sliding frame 330 has several sliding holes 332 that correspond one-to-one with the position and size of the sliding rod 320. The matching threaded holes 331 allow the sliding frame 330 to move smoothly along the axial direction of the threaded rod 350 when the threaded rod 350 rotates. The cooperation between the sliding holes 332 and the sliding rod 320 further restricts the movement trajectory of the sliding frame 330, ensuring that it can only make linear movements and will not deflect or shake, thereby ensuring the stability and reliability of the speed regulating device 300.

[0040] During actual operation, the motor 390 starts or stops based on the temperature information fed back by the temperature monitor. When the temperature of the main inverter components rises and heat dissipation needs to be accelerated, the motor 390 starts, driving the worm gear 360 to rotate. The worm gear 360 drives the worm wheel 351 and the threaded rod 350 to rotate, causing the sliding frame 330 to move away from the fixed frame 310. The spiral spring 340 extends, increasing the flow cross-section and accelerating the coolant flow rate, thus carrying away more heat. When the temperature of the main inverter components drops to a certain level, the motor 390 reverses, causing the sliding frame 330 to move closer to the fixed frame 310. The spiral spring 340 contracts, reducing the flow cross-section and slowing down the coolant flow rate.

[0041] It is worth noting that, please refer to Figure 3 and Figure 8As shown, the turbulence device 400 includes several turbulence plates 410 hinged to the inner wall of the housing 100 and a first hinge line 440 connecting each turbulence plate 410. A first gear 420 is provided on the hinge shaft of the bottom turbulence plate 410, and the first gear 420 meshes with the rack 380 on the corresponding side. A second gear 430 is provided at the end of the hinge shaft of the bottom turbulence plate 410 after extending out of the housing 100. When the sliding frame 330 slides up and down, the rack 380 at its top will drive the first gear 420 to rotate. The rotation of the first gear 420 will drive the bottom turbulence plate 410 to rotate, and then drive each turbulence plate 410 to rotate synchronously through the first hinge line 440, thereby changing the angle between the turbulence plate 410 and the horizontal plane, so that the turbulence plate 410 can automatically adjust its angle according to the change of coolant flow rate. When the coolant flow rate is relatively fast, the baffle 410 rotates to a larger angle to increase the disturbance effect on the coolant, so that it can fully contact the main components of the inverter and improve the heat dissipation efficiency; when the coolant flow rate is relatively slow, the baffle 410 rotates to a smaller angle to reduce the resistance to the coolant and ensure that the coolant can flow smoothly.

[0042] For further details, please refer to Figure 8 As shown, several triangular blocks 411 are welded and fixed on the outer wall of the spoiler 410. The triangular blocks 411 increase the disturbance effect of the spoiler 410 on the coolant. The inner wall of the outer shell 100 is provided with a first groove that matches the size of the spoiler 410. The first groove provides installation space for the spoiler 410 and also limits the rotation range of the spoiler 410 to a certain extent, ensuring its rotational stability.

[0043] For details, please refer to Figure 3 and Figure 9 As shown, the heat dissipation device 500 includes several heat dissipation fins 510 hinged to the outer wall of the outer shell 100 and a second hinge line 530 connecting each heat dissipation fin 510. A third gear 520 is provided at the end of the hinge shaft of the bottom heat dissipation fin 510 after it extends out of the outer shell 100. The third gear 520 meshes with the second gear 430 on the corresponding side. When the spoiler 410 rotates, it will drive the second gear 430 to rotate. The second gear 430 will then drive the third gear 520 meshing with it to rotate. The rotation of the third gear 520 will cause the bottom heat dissipation fins 510 to rotate, and then drive each heat dissipation fin 510 to rotate synchronously through the second hinge line 530, changing the angle between the heat dissipation fins 510 and the horizontal plane. The included angle of the heat dissipation fins 510 can change with the rotation of the baffle 410. When the baffle 410 rotates to a larger angle due to the high flow rate of the coolant, the heat dissipation fins 510 also rotate to a larger angle accordingly, increasing the contact area with the air and improving the heat dissipation efficiency. When the baffle 410 rotates to a smaller angle due to the slow flow rate of the coolant, the heat dissipation fins 510 also rotate to a smaller angle.

[0044] For further details, please refer to Figure 2 As shown, the heat dissipation fins 510 are made of aluminum alloy. The outer wall of the outer shell 100 has a second groove that matches the size of the heat dissipation fins 510. Aluminum alloy has excellent thermal conductivity, which further improves the heat dissipation effect. The second groove not only provides an installation position for the heat dissipation fins 510, but also guides and restricts the rotation of the heat dissipation fins 510, ensuring that the heat dissipation fins 510 remain stable during rotation and will not wobble or shift, thereby ensuring that the heat dissipation device 500 can work stably.

[0045] In practical use, through the coordinated operation of the speed control device 300, the turbulence device 400 and the heat dissipation device 500, the coolant flow rate, the angle of the turbulence plate 410 and the angle of the heat dissipation fins 510 can be automatically adjusted according to the actual temperature of the main inverter components, thus achieving efficient and intelligent heat dissipation and effectively ensuring the stable operation of the main inverter components under various operating conditions.

[0046] For details, please refer to Figure 2 As shown, when the sliding frame 330 slides to the top, both the baffle 410 and the heat dissipation fins 510 rotate to a horizontal state; when the sliding frame 330 slides to the bottom, the spiral springs 340 overlap to form a sheet-like blockage of the liquid inlet pipe 110, and both the baffle 410 and the heat dissipation fins 510 rotate to a vertical state. This design allows each component to achieve its optimal working state under different operating conditions. When the sliding frame 330 is at its highest position and the baffle 410 and the heat dissipation fins 510 are horizontal, the coolant flow rate is relatively fast. The large angle of the baffle 410 can fully agitate the coolant, allowing it to make full contact with the inverter's main components, greatly improving the heat dissipation effect. At the same time, the heat dissipation fins 510 are horizontally deployed, maximizing the contact area with the air, which can quickly dissipate heat to the surrounding environment. When the sliding bracket 330 is at its lowest position, the spiral springs 340 overlap and block the inlet pipe 110, which can effectively control the coolant flow and avoid excessive coolant flow that would waste energy. At this time, the baffle 410 and the heat dissipation fins 510 are in a vertical state, which has less resistance to the coolant and ensures that the coolant can still flow smoothly at low flow rates.

[0047] When the user-side distributed fully immersed liquid-cooled micro inverter of the present invention is in operation, the operator first securely installs the main inverter components on the mounting bracket 130 inside the housing 100, and then securely fixes the cover plate 200 to the housing 100 with fastening bolts 210 to ensure that the sealing ring is installed in place to prevent coolant leakage. Then, the inlet pipe 110 and outlet pipe 120 are correctly connected to the external liquid cooling circulation heat dissipation system through conduits to build a complete coolant circulation channel; after the inverter starts running, the temperature monitor monitors the temperature of the inverter's main components in real time and feeds the temperature information back to the control system. When the temperature rises and faster heat dissipation is needed, the control system starts the motor 390, which drives the worm gear 360 to rotate. The worm gear 360 drives the worm wheel 351 and the threaded rod 350 to rotate, causing the sliding frame 330 to move away from the fixed frame 310. The spiral spring 340 extends, increasing the flow cross-section and accelerating the coolant flow rate, thus carrying away more heat. At the same time, the rack 380 at the top of the sliding frame 330 drives the first gear 420 to rotate. The first gear 420 drives the bottom baffle 410 to rotate, and then drives each baffle 410 to rotate synchronously through the first hinge line 440. This changes the angle between the baffle 410 and the horizontal plane, increasing the disturbance effect on the coolant and ensuring full contact with the inverter's main components. Furthermore, when the baffle 410 rotates, the second gear 430 and the third gear 520 drive the heat dissipation fins 510 to rotate, changing the angle between the heat dissipation fins 510 and the horizontal plane, increasing the contact area with the air, and improving heat dissipation efficiency. When the temperature of the main inverter components drops to a certain level, the motor 390 reverses, causing the sliding frame 330 to move closer to the fixed frame 310. The spiral spring 340 contracts, reducing the flow cross-section and slowing down the coolant flow rate. The baffle 410 and the heat dissipation fins 510 also adjust their angles accordingly, reducing resistance to the coolant and ensuring smooth coolant flow. This achieves automatic adjustment of the heat dissipation strategy based on the actual temperature of the main inverter components, ensuring that the main inverter components are always within a suitable operating temperature range and operate stably.

[0048] It should be noted that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A user-side distributed fully immersed liquid-cooled micro inverter, comprising a housing (100) for mounting the main inverter components and a cover plate (200) for sealing the opening of the housing (100), characterized in that: The outer casing (100) is provided with an outlet pipe (120) and an inlet pipe (110) at its upper and lower ends, respectively. A speed regulating device (300) is installed inside the inlet pipe (110). A flow turbulence device (400) is installed on both sides of the inner side of the outer casing (100). A heat dissipation device (500) is installed on both sides of the outer side of the outer casing (100). The speed regulating device (300) includes a fixed frame (310) fixed inside the liquid inlet pipe (110), a sliding frame (330) slidably connected to the fixed frame (310), and a spiral spring (340) installed between the fixed frame (310) and the sliding frame (330). A bracket (370) is welded and fixed to the top of the sliding frame (330), and racks (380) are provided on both sides of the top of the bracket (370). A threaded rod (350) is rotatably connected to one end of the fixed frame (310), and the threaded rod (350) is threadedly connected to the sliding frame (330). A motor (390) is installed on the outer wall of the liquid inlet pipe (110) for driving the sliding frame (330) to rise and fall. The spoiler device (400) includes a plurality of spoiler plates (410) hinged to the inner sidewall of the housing (100) and a first hinge line (440) connecting each spoiler plate (410). A first gear (420) is provided on the hinge shaft of the spoiler plate (410) located on the bottom side. The first gear (420) meshes with the rack (380) on the corresponding side. A second gear (430) is provided after the end of the hinge shaft of the spoiler plate (410) on the bottom side extends out of the housing (100). The heat dissipation device (500) includes a plurality of heat dissipation fins (510) hinged to the outer wall of the outer shell (100) and a second hinge line (530) connecting each heat dissipation fin (510). A third gear (520) is provided at the end of the hinge shaft of the heat dissipation fin (510) on the bottom side after it extends out of the outer shell (100). The third gear (520) meshes with the second gear (430) on the corresponding side.

2. The user-side distributed fully immersed liquid-cooled micro inverter according to claim 1, characterized in that: The back plate inside the housing (100) is welded and fixed with a mounting bracket (130) for installing the main components of the inverter and several corrugated guide plates (140). A diverter block (150) is welded and fixed inside the housing (100) near the liquid inlet pipe (110). A temperature monitor is installed inside the housing (100).

3. The user-side distributed fully immersed liquid-cooled micro inverter according to claim 2, characterized in that: The cover plate (200) is fixed to the outer shell (100) by several fastening bolts (210). A sealing ring is provided between the cover plate (200) and the outer shell (100). The liquid inlet pipe (110) and the liquid outlet pipe (120) are connected to the external liquid cooling circulation heat dissipation system through conduits.

4. The user-side distributed fully immersed liquid-cooled micro inverter according to claim 3, characterized in that: The bottom end of the threaded rod (350) is welded and fixed with a worm gear (351), and the side wall of the liquid inlet pipe (110) is rotatably connected with a worm (360) that meshes with the worm gear (351).

5. The user-side distributed fully immersed liquid-cooled micro inverter according to claim 4, characterized in that: The output shaft of the motor (390) is coaxially connected to the worm gear (360), and several sliding rods (320) are welded and fixed to the top end of the fixed frame (310).

6. The user-side distributed fully immersed liquid-cooled micro inverter according to claim 5, characterized in that: The sliding frame (330) has a threaded hole (331) on one side that is compatible with the threaded rod (350), and the sliding frame (330) has a plurality of sliding holes (332) that correspond one-to-one with the position and size of the sliding rod (320).

7. The user-side distributed fully immersed liquid-cooled micro inverter according to claim 6, characterized in that: Several triangular blocks (411) are welded and fixed on the outer side wall of the spoiler (410), and a first groove adapted to the size of the spoiler (410) is provided on the inner side wall of the outer shell (100).

8. The user-side distributed fully immersed liquid-cooled micro inverter according to claim 7, characterized in that: The heat dissipation fins (510) are made of aluminum alloy, and the outer wall of the outer shell (100) is provided with a second groove that matches the size of the heat dissipation fins (510).

9. The user-side distributed fully immersed liquid-cooled micro inverter according to claim 8, characterized in that: When the sliding frame (330) slides to the top, the baffle (410) and the heat dissipation fins (510) both rotate to a horizontal state; when the sliding frame (330) slides to the bottom, the spiral springs (340) overlap to form a sheet-like blockage of the liquid inlet pipe (110), and the baffle (410) and the heat dissipation fins (510) both rotate to a vertical state.

10. The application of user-side distributed fully immersed liquid-cooled micro-inverters, characterized by: It is the user-side distributed fully immersed liquid-cooled micro inverter as described in claim 9, used in small-capacity distributed photovoltaic systems on the rooftops of industrial and commercial buildings.

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