Efficient heat dissipation type industrial and commercial photovoltaic power station inverter

Abstract

The invention belongs to the technical field of new energy and power electronics, and particularly relates to an efficient heat dissipation type industrial and commercial photovoltaic power station inverter which comprises a body, a cover plate, a circuit board, a first heat dissipation fin set and the like, the cover plate is installed at the top end of the body, a plurality of ventilation holes are formed in the front side, the rear side and the right side of the body, and the circuit board is installed in the body. The two first heat dissipation fin sets are symmetrical front and back, fixedly connected to the top end of the circuit board and staggered with the ventilation holes. Initial heat dissipation of the circuit board is achieved through the first heat dissipation fin set and the second heat dissipation fin set, efficient transfer and dissipation of heat of the circuit board are achieved through cooperative work of the driving mechanism, the cooling mechanism and the extracting and discharging mechanism, and specifically, after the cooling mechanism exchanges heat with the circuit board, the heat of the circuit board can be effectively dissipated. And efficient heat exchange with outside cold air is achieved under assistance of the driving mechanism, stable circulation of refrigerants is guaranteed through the extraction and discharge mechanism, and the cooling effect is continuously transmitted to the first cooling fin set.

Description

Technical Field

[0001] The present invention belongs to the field of new energy and power electronics technology, and in particular relates to an efficient heat dissipation type industrial and commercial photovoltaic power station inverter. Background Art

[0002] The inverter of an industrial and commercial photovoltaic power station is a device that converts the variable DC voltage generated by solar photovoltaic modules into AC power of the mains frequency. It can be connected to the public power grid transmission system and is an indispensable part of the photovoltaic system. It is called the "brain" or "heart" of the photovoltaic power generation system.

[0003] The patent with the patent authorization announcement number CN116709631A discloses a photovoltaic inverter, including a circuit board and a heat sink, the arrangement of the IGBT chips on the back of the circuit board includes at least one centralized arrangement area, and the centralized arrangement area is provided with an elastic clamping device on the back of the circuit board, and the elastic clamping device includes an elastic clamping plate, and the elastic clamping plate includes a substrate and a clamping claw plate. Although the above patent can force each heating element IGBT chip to always press and stick to the heat conductive bonding surface of the heat sink by assembling an elastic clamping claw, thereby achieving heat dissipation of the photovoltaic inverter to a certain extent, under high power density, the IGBT chip, as a key heating element in the photovoltaic inverter, may generate a lot of heat, and the heat may not be dissipated quickly by heat conduction between the heat sink and the IGBT chip, resulting in an increase in the internal temperature of the inverter. This temperature increase will not only reduce the operating efficiency of the equipment, but also accelerate the aging of the internal electronic components, thereby affecting the stability and life of the equipment.

[0004] Therefore, there is a particular need for an efficient heat dissipation type industrial and commercial photovoltaic power station inverter to solve the above problems. Summary of the invention

[0005] In order to overcome the shortcomings of existing patents under high power density, the heat dissipation is difficult to quickly dissipate a large amount of heat by heat conduction between the heat sink and the IGBT chip, resulting in excessively high internal temperature of the inverter, affecting the operating efficiency of the equipment, accelerating component aging, and reducing equipment stability and life. The technical problem to be solved is to provide an industrial and commercial photovoltaic power station inverter with high efficiency heat dissipation.

[0006] The present invention is achieved through the following technical approaches: an efficient heat dissipation type industrial and commercial photovoltaic power station inverter, including a body, a cover plate, a circuit board, a first heat dissipation fin group, a ventilation plate, a first fan, a first protective net and a second heat dissipation fin group, the cover plate is installed at the top of the body, a plurality of ventilation holes are opened on the front side, the rear side and the right side of the body, the circuit board is installed inside the body, two first heat dissipation fin groups are symmetrical front and back, fixed to the top of the circuit board, and the ventilation holes are staggered, each first fan is installed at the upper left part of each first heat dissipation fin group, each first protective net is installed at the top of each first fan, the second heat dissipation fin group is fixed to the lower part of the body, two ventilation plates are distributed front and back, installed at the lower left part of the body, and contact the left part of the second heat dissipation fin group, the ventilation slot of each ventilation plate adopts an inclined design, and also includes a driving mechanism, a cooling mechanism and an extraction and discharge mechanism, the cooling mechanism is arranged inside the body, the driving mechanism is arranged on the box and the cooling mechanism, and the extraction and discharge mechanism is arranged between the first fan and the cooling mechanism.

[0007] As a preferred technical solution of the present invention, the cooling mechanism includes a partition, a box body, an exhaust pipe, a cooling pipe, a water pump, a spiral coil, an air inlet tube and an air outlet pipe. The partition is fixedly connected to the left part of the main body, dividing the interior of the main body into two spaces, wherein the left space is a refrigeration area, and the right space is a heat generation area. The two ventilation plates are aligned below the refrigeration area, the bottom end of the partition is in contact with the top of the circuit board, and a plurality of through holes are opened on the left part of the circuit board. The box body is fixedly connected to the left part of the circuit board and is located in the refrigeration area of ​​the main body. The two exhaust pipes are distributed front and back and fixedly connected to the upper part of the box body. The air inlet end of each exhaust pipe is connected to the box body, and the exhaust end passes through the partition and is connected to the corresponding first heat dissipation fin group. The two cooling pipes are distributed front and back, fixedly connected to the inside of the main body, and are located below the circuit board. The port at the upper end of each cooling pipe is the water inlet end, and the port at the lower end is the water outlet end. Each A water pump is installed at the lower end of each cooling pipe, and its water pumping end is connected with the water outlet end of the corresponding cooling pipe. Two spiral coils are distributed front and back and installed inside the box. The port at the upper end of each spiral coil is the water outlet end, and the port at the lower end is the water inlet end. Its water inlet end is connected with the water delivery end of the corresponding water pump, and the water outlet end is connected with the water inlet end of the corresponding cooling pipe. The two air inlet cylinders are symmetrical front and back and are rotatably connected to the inside of the box. Multiple air outlet pipes are distributed in four layers and six rows and are fixed to each air inlet cylinder. Each spiral coil surrounds the outside of the corresponding air inlet cylinder, and there is an appropriate gap between its outer tube wall and the outer wall of the corresponding air inlet cylinder. The air outlet end of each air outlet pipe is aligned with the outer tube wall of the corresponding spiral coil, and the air outlet pipe adopts an inclined design. The cooling pipe and the spiral coil are filled with coolant, the box is filled with refrigerant, and the liquid level of the refrigerant is lower than that of the lowest layer of air outlet pipes.

[0008] As a preferred technical solution of the present invention, the driving mechanism includes a support frame, a second fan and a second protective net. The two support frames are symmetrically distributed and installed at the bottom of the box body. Each second fan is installed inside each support frame, and its bearing extends to the inside of the vertically aligned air inlet tube and is fixedly connected to the air inlet tube. Each second protective net is installed at the bottom of each support frame and is located above the second cooling fin group and in contact with it. The two second protective nets correspond one-to-one to the two second fans.

[0009] As a preferred technical solution of the present invention, the extraction and discharge mechanism includes a rotating disk, a connecting shaft, a synchronous belt assembly, a third heat dissipation fin group, a corrugated plate, a fixed plate, a piston cylinder, a piston plate, a piston rod, a spring, a discharge port and a liquid extraction tube. The two rotating disks are distributed front and back and are rotatably connected to the upper part of the box. Each connecting shaft is fixed to the middle of each rotating disk. Each synchronous belt assembly is arranged between the bearing of each first fan and each connecting shaft. The two third heat dissipation fin groups are distributed front and back and are fixed to the bottom end of the box and are in contact with the upper parts of the two support frames. Each corrugated plate is installed at the bottom end of each rotating disk and is located inside the box. The two fixed plates are symmetrical front and back. , fixedly connected to the upper part of the box body, and rotatably cooperate with the corresponding connecting shaft to provide a second support point for the connecting shaft. Every six piston cylinders form a group and are fixedly connected to each fixed plate in an interlaced manner. Each piston plate of the circular structure is slidably connected to the inside of each piston cylinder. Each piston rod is fixedly connected to the center point of the top of each piston plate, and passes through the corresponding piston cylinder to slide with it. Each spring is arranged inside each piston cylinder, and its two ends are respectively fixedly connected to the corresponding piston plate and the corresponding piston cylinder. Each discharge port is fixedly connected to the center of the bottom end of each piston cylinder. Each liquid extraction pipe is fixedly connected to each piston cylinder, and its lower end is close to the bottom end of the box body. The liquid extraction pipe is a one-way tube.

[0010] As a preferred technical solution of the present invention, it also includes a heat dissipation braided belt, each heat dissipation braided belt is fixed to the recess of each first heat dissipation fin group and forms a close thermal contact with the first heat dissipation fin group, and the top of each heat dissipation braided belt is flush with the top of the corresponding first heat dissipation fin group.

[0011] As a preferred technical solution of the present invention, it also includes support plates, which are symmetrical front and back, fixed to the upper part of the box body, and located below the two fixed plates. The lower part of each piston cylinder passes through the corresponding support plate, and the top of each air inlet cylinder rotates with the bottom end of the vertically aligned support plate to provide a second support point for the air inlet cylinder, and each liquid extraction pipe passes through the corresponding support plate.

[0012] As a preferred technical solution of the present invention, there are six raised portions and six recessed portions on each corrugated plate, corresponding to the six piston rods in each group of piston cylinders.

[0013] As a preferred technical solution of the present invention, each cooling pipe has a serpentine structure, and is composed of a plurality of long strips of pipes arranged in parallel, and a channel is formed between each of the long strips of pipes.

[0014] Beneficial effects:

[0015] The initial heat dissipation of the circuit board is achieved through the first heat dissipation fin group and the second heat dissipation fin group, and the efficient transfer and dissipation of the heat of the circuit board is achieved through the coordinated work of the driving mechanism, the cooling mechanism and the extraction and discharge mechanism. Specifically, after the cooling mechanism exchanges heat with the circuit board, it efficiently exchanges heat with the external cold air with the help of the driving mechanism, and the extraction and discharge mechanism ensures the stable circulation of the refrigerant, and continuously transmits the cooling effect to the first heat dissipation fin group. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0017] Figure 2 It is a three-dimensional structural schematic diagram of components such as a circuit board, a first heat dissipation fin group and a ventilation plate of the present invention.

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of components such as the first fan, the first protective net and the second heat dissipation fin group of the present invention.

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the box body, rotating disk, connecting shaft and other components of the present invention.

[0020] Figure 5 It is a three-dimensional structural schematic diagram of components such as the housing, rotating disk and exhaust pipe of the present invention.

[0021] Figure 6 It is a three-dimensional structural schematic diagram of components such as the cooling tube, the support frame and the third heat dissipation fin group of the present invention.

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the cooling tube, the support frame, the third heat dissipation fin group, the spiral coil and the corrugated plate component of the present invention.

[0023] Figure 8 It is a partial cross-sectional view of the housing and rotating disk components of the present invention.

[0024] Fig. 9 It is a partial cross-sectional view of the rotating disk, the fixed plate and the supporting plate components of the present invention.

[0025] Fig.10 It is a partial cross-sectional view of the air inlet cylinder component of the present invention.

[0026] Fig.11 It is a partial cross-sectional view of the piston cylinder and the liquid discharge port component of the present invention.

[0027] Fig.12 It is an exploded schematic diagram of the support frame, the second fan and the second protective net component of the present invention.

[0028] Wherein: 1, body, 2, cover plate, 3, ventilation hole, 4, circuit board, 5, first heat dissipation fin group, 6, ventilation plate, 7, first fan, 71, first protective net, 8, heat dissipation braided belt, 9, second heat dissipation fin group, 10, partition, 11, box body, 12, rotating disk, 121, connecting shaft, 13, exhaust pipe, 14, synchronous belt assembly, 15, cooling pipe, 151, water pump, 16, support frame, 161, second fan, 162, second protective net, 17, third heat dissipation fin group, 18, spiral coil, 19, corrugated plate, 20, fixing plate, 21, air inlet tube, 22, air outlet tube, 23, support plate, 24, piston cylinder, 25, piston plate, 26, piston rod, 27, spring, 28, drain port, 29, liquid extraction pipe. DETAILED DESCRIPTION

[0029] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0030] Embodiment: A high-efficiency heat dissipation type industrial and commercial photovoltaic power station inverter, such as Figure 1-Figure 12As shown, it includes a body 1, a cover plate 2, a circuit board 4, a first heat dissipation fin group 5, a ventilation plate 6, a first fan 7, a first protective net 71, a heat dissipation braided belt 8 and a second heat dissipation fin group 9. The cover plate 2 is connected to the top of the body 1 by bolts, and a plurality of ventilation holes 3 are opened on the front side, the rear side and the right side of the body 1 to achieve effective air circulation. The circuit board 4 is connected to the inside of the body 1 by bolts. Two first heat dissipation fin groups 5 are symmetrical front and back, connected to the top of the circuit board 4 by bonding, and the ventilation holes 3 are staggered. When the circuit board 4 generates heat, the heat is transferred through the heat transfer The heat is transferred to the first heat dissipation fin group 5. When the heat on the first heat dissipation fin group 5 accumulates to a certain extent, the surrounding air will be heated and rise to form natural convection. At the same time, the external cold air enters the body 1 through the ventilation holes 3 to supplement the heated and exhausted hot air, thereby maintaining a continuous heat dissipation cycle. Each first fan 7 is connected to the upper left part of each first heat dissipation fin group 5 by bolts. The airflow generated by the operation of the first fan 7 can accelerate the flow of air around the first heat dissipation fin group 5, so that the heat is dissipated into the air faster, taken away by air convection, and passed through The heat is dissipated to the outside of the body 1 through the ventilation holes 3, each first protective net 71 is connected to the top of each first fan 7 by bolts, each heat dissipation braided belt 8 is connected to the depression of each first heat dissipation fin group 5 by bonding, and forms a close thermal contact with the first heat dissipation fin group 5, the top of each heat dissipation braided belt 8 is flush with the top of the corresponding first heat dissipation fin group 5, and the heat dissipation braided belt 8 itself has a large surface area, so that the heat on the first heat dissipation fin group 5 can be quickly transferred to the heat dissipation braided belt 8, and then dissipated to the air through air convection, ensuring the heat of the circuit board 4 It can be efficiently transmitted to the first heat dissipation fin group 5. The second heat dissipation fin group 9 is connected to the lower part of the main body 1 by bonding. Two ventilation plates 6 are distributed front and back, connected to the lower left part of the main body 1 by bolts, and contact the left part of the second heat dissipation fin group 9. The ventilation slots of each ventilation plate 6 adopt an inclined design to guide the air flow and realize air circulation in the left part of the main body 1. It also includes a driving mechanism, a cooling mechanism and an extraction and discharge mechanism. The cooling mechanism is arranged inside the main body 1, the driving mechanism is arranged on the cooling mechanism, and the extraction and discharge mechanism is arranged between the first fan 7 and the cooling mechanism.

[0031] Figure-2 Fig.10 and Fig.12As shown, the cooling mechanism includes a partition 10, a box body 11, an exhaust pipe 13, a cooling pipe 15, a water pump 151, a spiral coil 18, an air inlet 21 and an air outlet 22. The partition 10 is connected to the left part of the main body 1 by welding, dividing the interior of the main body 1 into two spaces, wherein the left space is a refrigeration area, and the right space is a heat generation area. The two ventilation plates 6 are aligned below the refrigeration area. The bottom end of the partition 10 is in contact with the top of the circuit board 4, and the left part of the circuit board 4 is provided with a plurality of through holes, so that the outside cold air can enter the refrigeration area through the two ventilation plates 6 and the plurality of through holes. The box body 11 is connected to the left part of the circuit board 4 by welding and is located in the refrigeration area of ​​the main body 1. The two exhaust pipes 13 are distributed front and back and are connected to the box body by welding. The air inlet end of each exhaust pipe 13 is connected to the box body 11, and the exhaust end passes through the partition 10 and is connected to the corresponding first heat dissipation fin group 5, so that the cold air inside the box body 11 can be discharged from the exhaust pipe 13 to the first heat dissipation fin group 5. The two cooling pipes 15 are distributed front and back, connected to the inside of the main body 1 by welding, and are located below the circuit board 4. Each cooling pipe 15 has a serpentine structure and is composed of a plurality of parallel long strips of pipes. A channel is formed between each long strip of pipe, which helps to evenly distribute the coolant, avoid local overheating or insufficient cooling, and prolong the residence time of the coolant in the cooling pipe 15. The port at the upper end of each cooling pipe 15 is the water inlet end, and the port at the lower end is the water outlet end. Each water pump 151 is bolted The cooling tube 15 is connected to the lower end of each cooling tube 15 in a manner, and its pumping end is connected to the water outlet end of the corresponding cooling tube 15. The two spiral coils 18 are distributed front and back and connected to the inside of the box body 11 by bolts. The port at the upper end of each spiral coil 18 is the water outlet end, and the port at the lower end is the water inlet end. Its water inlet end is connected to the water supply end of the corresponding water pump 151, and the water outlet end is connected to the water inlet end of the corresponding cooling tube 15, so that the coolant can circulate between the cooling tube 15 and the spiral coil 18. The two air inlet cylinders 21 are symmetrical front and back and are rotatably connected to the inside of the box body 11. The twenty-four air outlet pipes 22 are distributed in four layers and six rows and are connected to each air inlet cylinder 21 by welding. Each spiral coil 18 surrounds the outside of the corresponding air inlet cylinder 21, and its outer pipe wall is connected to the corresponding There is an appropriate gap between the outer walls of the air inlet tube 21, and the outlet end of each air outlet pipe 22 is aligned with the outer tube wall of the corresponding spiral coil 18, so that the cold air discharged from the air outlet pipe 22 can be fully blown onto the spiral coil 18, and the air outlet pipe 22 adopts an inclined design, which can optimize the airflow direction, so that the cold air can be blown more directly to the spiral coil 18, thereby improving the heat exchange effect. The cooling tube 15 and the spiral coil 18 are both filled with coolant, which is an ethylene glycol-based coolant or a silicone oil coolant with a high boiling point and good thermal stability, and can meet the needs of long-term operation. The box body 11 is filled with refrigerant, and the liquid level of the refrigerant is lower than the lowest layer of the air outlet pipe 22, ensuring that the liquid level of the refrigerant is controlled below the lowest layer of the air outlet pipe 22.Prevent the refrigerant from entering the air inlet tube 21 through the air outlet pipe 22.

[0032] like Figure 6 , Figure 7 , Fig.10 and Fig.12 As shown, the driving mechanism includes a support frame 16, a second fan 161 and a second protective net 162. The two support frames 16 are symmetrically distributed and connected to the bottom end of the box body 11 by bolts. Each second fan 161 is connected to the inside of each support frame 16 by bolts, and its bearing extends to the inside of the vertically aligned air inlet cylinder 21 and is fixedly connected to the air inlet cylinder 21. When the second fan 161 is running, its bearing drives the air inlet cylinder 21 to rotate. Each second protective net 162 is connected to the bottom end of each support frame 16 by bolts and is located above the second heat dissipation fin group 9 and contacts therewith to improve the stability of the support frame 16. The two second protective nets 162 correspond one to one with the two second fans 161.

[0033] like Figure 4-Figure 12As shown, the extraction and discharge mechanism includes a rotating disk 12, a connecting shaft 121, a synchronous belt assembly 14, a third heat dissipation fin group 17, a corrugated plate 19, a fixed plate 20, a support plate 23, a piston cylinder 24, a piston plate 25, a piston rod 26, a spring 27, a discharge port 28 and a liquid extraction pipe 29. The two rotating disks 12 are distributed front and back and are rotatably connected to the upper part of the housing 11. Each connecting shaft 121 is connected to the middle part of each rotating disk 12 by welding. Each synchronous belt assembly 14 is arranged between the bearing of each first fan 7 and each connecting shaft 121. When the first fan 7 is running, its bearing is restrained by the synchronous belt assembly 14 to rotate the rotating disk 12. The two third heat dissipation fin groups 17 are distributed front and back and are connected to the housing 11 by bonding. The bottom end is in contact with the upper parts of the two support frames 16 to improve the stability of the third heat dissipation fin group 17. The third heat dissipation fin group 17 can exchange heat with the refrigerant inside the box body 11 to achieve a good cooling effect. Each corrugated plate 19 is connected to the bottom end of each rotating disk 12 by bolts and is located inside the box body 11. The two fixed plates 20 are symmetrical front and back, connected to the upper part of the box body 11 by welding, and rotatably cooperate with the corresponding connecting shaft 121 to provide a second support point for the connecting shaft 121 to improve its stability during rotation. Every six piston cylinders 24 are a group and are connected to each fixed plate 20 by welding. Each piston plate 25 of the circular structure is slidably connected to the inside of each piston cylinder 24. Each piston rod 26 It is connected to the center point of the top of each piston plate 25 by bonding, and passes through the corresponding piston cylinder 24 to slide with it. Each spring 27 is arranged inside each piston cylinder 24, and its two ends are fixedly connected to the corresponding piston plate 25 and the corresponding piston cylinder 24 respectively. Each discharge port 28 is connected to the center of the bottom end of each piston cylinder 24 by welding. Each extraction pipe 29 is connected to each piston cylinder 24 by welding, and its lower end is close to the bottom end of the box body 11 to ensure that the refrigerant in the lower layer of the box body 11 can be extracted. The extraction pipe 29 is a one-way pipe that can only extract but not discharge. There are six raised parts and six recessed parts on each corrugated plate 19, corresponding to the six piston rods 26 in each group of piston cylinders 24. When each corrugated plate 19 When the corresponding rotating disk 12 rotates, the six raised parts align and squeeze the six piston rods 26 at the same time, or the six recessed parts align and stop squeezing the six piston rods 26 at the same time, ensuring that the six piston plates 25 in each group of piston cylinders 24 reciprocate with exactly the same rhythm and amplitude, thereby achieving more efficient refrigerant extraction or discharge. The two support plates 23 are symmetrical front to back and are connected to the upper part of the box body 11 by welding and are located below the two fixed plates 20. The lower part of each piston cylinder 24 passes through the corresponding support plate 23, and the top end of each air inlet cylinder 21 rotates with the bottom end of the vertically aligned support plate 23 to provide a second support point for the air inlet cylinder 21, ensuring that the air inlet cylinder 21 can rotate smoothly, and each liquid extraction pipe 29 passes through the corresponding support plate 23.

[0034] When the inverter starts to run, the circuit board 4 generates a large amount of heat. First, the first heat dissipation fin group 5 and the heat dissipation braided belt 8 exchange heat with the circuit board 4 to quickly absorb and disperse the heat on the circuit board 4. At the same time, the second heat dissipation fin group 9 exchanges heat with the circuit board 4 through the body 1 to achieve initial heat dissipation of the circuit board 4. Then, the first fan 7 is started, and its operation accelerates the flow of air around the first heat dissipation fin group 5 to enhance the heat exchange effect of the first heat dissipation fin group 5.

[0035] Then, the water pump 151 and the second fan 161 are started. The water pump 151 starts to extract the coolant in the cooling tube 15 and sends the extracted coolant into the spiral coil 18. At this time, the second fan 161 starts to send the external cold air into the air inlet 21, and then blows it to the spiral coil 18 from the air outlet 22. The blown cold air exchanges heat with the coolant in the spiral coil 18 to reduce the temperature of the coolant. The cooled coolant is discharged from the spiral coil 18 back into the cooling tube 15, thereby realizing the circulation of the coolant, ensuring that the coolant in the cooling tube 15 always maintains a low temperature, and continuously exchanges heat with the circuit board 4 to achieve the later heat dissipation of the circuit board 4. At the same time, the air inlet 21 drives the air outlet 22 to rotate clockwise with the bearing of the second fan 161, and blows the cold air to the spiral coil 18 in an all-round way, thereby improving the heat exchange efficiency between the cold air and the coolant.

[0036] During the circulation of the coolant in the cooling tube 15, the third heat dissipation fin group 17 exchanges heat with the refrigerant in the lower layer inside the box body 11, thereby reducing the temperature of the refrigerant in the lower layer inside the box body 11. When the first fan 7 is running, its bearing restrains the connecting shaft 121 to rotate clockwise through the synchronous belt assembly 14, and the rotating disk 12 drives the corrugated plate 19 to rotate clockwise with the connecting shaft 121. When the corrugated plate 19 rotates, its convex part aligns with and squeezes the piston rod 26 to move downward, and the spring 27 is compressed accordingly. The piston plate 25 moves downward with the piston rod 26, and a positive pressure is generated in the piston cylinder 24. The piston plate 25 squeezes the air in the piston cylinder 24 and discharges it from the drain port 28. When the corrugated plate 19 continues to rotate, the piston rod 26 is pressed downward, and the spring 27 is compressed accordingly. The piston plate 25 moves downward with the piston rod 26, and a positive pressure is generated in the piston cylinder 24. The piston plate 25 squeezes the air in the piston cylinder 24 and discharges it from the drain port 28. Rotate, its concave part aligns and stops squeezing the piston rod 26, the spring 27 returns to its original state, prompting the piston plate 25 to drive the piston rod 26 to move up and return to the initial position. At the same time, negative pressure is generated in the piston cylinder 24, so that the liquid extraction pipe 29 generates suction to extract the refrigerant with a lower temperature in the lower layer of the box body 11. As the corrugated plate 19 continues to rotate, the piston plate 25 reciprocates, and the liquid extraction pipe 29 intermittently extracts the refrigerant with a lower temperature. In this process, the refrigerant last drawn into the piston cylinder 24 will be discharged from the discharge port 28 into the box body 11 when it is extracted next time, and mixed with the refrigerant with a low temperature in the upper layer of the box body 11, thereby promoting the heat transfer and balance inside the entire refrigerant system;

[0037] The cold air becomes hot air after heat exchange with the coolant in the spiral coil 18. As more and more hot air remains in the box 11, the refrigerant cools the air in the box 11 again. The cooled cold air is discharged from the exhaust pipe 13 to the first heat dissipation fin group 5 for further heat exchange, helping to dissipate the heat on the circuit board 4.

[0038] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. An efficient heat dissipation type industrial and commercial photovoltaic power station inverter, comprising a body (1), a cover plate (2), a circuit board (4), a first heat dissipation fin group (5), a ventilation plate (6), a first fan (7), a first protective net (71) and a second heat dissipation fin group (9), wherein the cover plate (2) is mounted on the top of the body (1), a plurality of ventilation holes (3) are provided on the front side, the rear side and the right side of the body (1), the circuit board (4) is mounted inside the body (1), two first heat dissipation fin groups (5) are symmetrical in front and back, fixed to the top of the circuit board (4), and the ventilation holes (3) are staggered, each first fan (7) is mounted on the upper left part of each first heat dissipation fin group (5), each first protective net (71) is mounted on the top of each first fan (7), the second heat dissipation fin group (9) is fixed to the lower part of the body (1), two ventilation plates (6) are distributed in the front and back, mounted on the lower left part of the body (1), and contact the left part of the second heat dissipation fin group (9), and the ventilation slot of each ventilation plate (6) adopts an inclined design, characterized in that: It also includes a driving mechanism, a cooling mechanism and an extraction and discharge mechanism. The cooling mechanism is arranged inside the body (1), the driving mechanism is arranged on the cooling mechanism of the box (11), and the extraction and discharge mechanism is arranged between the first fan (7) and the cooling mechanism.

2. The high-efficiency heat dissipation type industrial and commercial photovoltaic power station inverter according to claim 1, characterized in that: The cooling mechanism comprises a partition (10), a box (11), an exhaust pipe (13), a cooling pipe (15), a water pump (151), a spiral coil (18), an air inlet tube (21) and an air outlet pipe (22); the partition (10) is fixedly connected to the left inner part of the body (1) to divide the interior of the body (1) into two spaces, wherein the left space is a cooling area and the right space is a heat generating area; the two ventilation plates (6) are aligned with the lower part of the cooling area; the bottom end of the partition (10) contacts the top end of the circuit board (4), and the left part of the circuit board (4) is provided with a plurality of through holes. The box body (11) is fixedly connected to the left side of the circuit board (4) and is located in the refrigeration area of ​​the main body (1). The two exhaust pipes (13) are distributed front and back and fixedly connected to the upper part of the box body (11). The air inlet end of each exhaust pipe (13) is connected to the box body (11), and the exhaust end passes through the partition (10) and is connected to the corresponding first heat dissipation fin group (5). The two cooling pipes (15) are distributed front and back and fixedly connected to the inside of the main body (1) and are located below the circuit board (4). The upper end port of each cooling pipe (15) is a water inlet end, and the lower end port is a water outlet end. A water pump (151) is installed at the lower end of each cooling pipe (15), and its water pumping end is connected to the water outlet end of the corresponding cooling pipe (15). Two spiral coils (18) are distributed front and back and installed inside the box body (11). The upper end port of each spiral coil (18) is the water outlet end, and the lower end port is the water inlet end. The water inlet end is connected to the water delivery end of the corresponding water pump (151), and the water outlet end is connected to the water inlet end of the corresponding cooling pipe (15). Two air inlet tubes (21) are symmetrical front and back and are rotatably connected to the inside of the box body (11). Multiple air outlet pipes (22) The spiral coils (18) are arranged in four layers and six rows and are fixedly connected to each air inlet tube (21). Each spiral coil (18) surrounds the outside of the corresponding air inlet tube (21). There is an appropriate gap between its outer tube wall and the outer wall of the corresponding air inlet tube (21). The air outlet end of each air outlet pipe (22) is aligned with the outer tube wall of the corresponding spiral coil (18), and the air outlet pipe (22) is designed to be inclined. The cooling pipe (15) and the spiral coil (18) are filled with cooling liquid. The box body (11) is filled with refrigerant, and the liquid level of the refrigerant is lower than that of the lowest layer of the air outlet pipe (22).

3. The high-efficiency heat dissipation type industrial and commercial photovoltaic power station inverter according to claim 2, characterized in that: The driving mechanism comprises a support frame (16), a second fan (161) and a second protective net (162); the two support frames (16) are symmetrically distributed and installed at the bottom end of the box body (11); each second fan (161) is installed inside each support frame (16); its bearing extends to the inside of the vertically aligned air inlet cylinder (21) and is fixedly connected to the air inlet cylinder (21); each second protective net (162) is installed at the bottom end of each support frame (16) and is located above the second heat dissipation fin group (9) and contacts therewith; the two second protective nets (162) correspond one to one to the two second fans (161).

4. The high-efficiency heat dissipation type industrial and commercial photovoltaic power station inverter according to claim 3 is characterized in that: The extraction and discharge mechanism comprises a rotating disk (12), a connecting shaft (121), a synchronous belt assembly (14), a third heat dissipation fin group (17), a corrugated plate (19), a fixed plate (20), a piston cylinder (24), a piston plate (25), a piston rod (26), a spring (27), a liquid discharge port (28) and a liquid extraction pipe (29). The two rotating disks (12) are distributed front and back and are rotatably connected to the upper part of the box body (11). Each connecting shaft (121) is fixedly connected to the middle part of each rotating disk (12). Each synchronous belt assembly (14) is arranged between the bearing of each first fan (7) and each connecting shaft (121). The two third heat dissipation fin groups (17) are distributed front and back and are fixedly connected to the bottom end of the box body (11) and are in contact with the upper parts of the two support frames (16). Each corrugated plate (19) is installed at the bottom end of each rotating disk (12) and is located inside the box body (11). The two fixed plates (20 ) are symmetrical front and back, fixed to the upper inner part of the housing (11), and rotatably cooperate with the corresponding connecting shaft (121), providing a second support point for the connecting shaft (121), and every six piston cylinders (24) form a group, which are fixed to each fixed plate (20) in an interlaced manner, and each piston plate (25) of the circular structure is slidably connected to the inside of each piston cylinder (24), and each piston rod (26) is fixed to the center point position of the top end of each piston plate (25), and passes through the corresponding piston cylinder (24) to slide with it, and each spring (27) is arranged in each piston cylinder (24), and its two ends are respectively fixedly connected to the corresponding piston plate (25) and the corresponding piston cylinder (24), and each liquid discharge port (28) is fixed to the center position of the bottom end of each piston cylinder (24), and each liquid extraction pipe (29) is fixed to each piston cylinder (24), and its lower end is close to the bottom end of the housing (11), and the liquid extraction pipe (29) is a one-way pipe.

5. The high-efficiency heat dissipation type industrial and commercial photovoltaic power station inverter according to claim 4, characterized in that: It also includes a heat dissipation braided belt (8), each heat dissipation braided belt (8) is fixedly connected to the recessed part of each first heat dissipation fin group (5) and forms a close thermal contact with the first heat dissipation fin group (5), and the top of each heat dissipation braided belt (8) is flush with the top of the corresponding first heat dissipation fin group (5).

6. The high-efficiency heat dissipation type industrial and commercial photovoltaic power station inverter according to claim 5, characterized in that: It also includes a support plate (23), the two support plates (23) are symmetrical in front and back, fixed to the upper part of the box body (11), and located below the two fixed plates (20), the lower part of each piston cylinder (24) passes through the corresponding support plate (23), the top end of each air inlet cylinder (21) is rotatably matched with the bottom end of the vertically aligned support plate (23), providing a second support point for the air inlet cylinder (21), and each liquid extraction pipe (29) passes through the corresponding support plate (23).

7. The high-efficiency heat dissipation type industrial and commercial photovoltaic power station inverter according to claim 6, characterized in that: Each cooling pipe (15) has a serpentine structure and is composed of a plurality of parallel long strip pipes, with channels formed between each of the long strip pipes.

8. The high-efficiency heat dissipation type industrial and commercial photovoltaic power station inverter according to claim 7, characterized in that: There are six raised portions and six recessed portions on each corrugated plate (19), corresponding to the six piston rods (26) in each group of piston cylinders (24).

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