Photovoltaic module junction box with high heat dissipation efficiency

Abstract

The invention discloses a photovoltaic module junction box with high heat dissipation efficiency, and relates to the technical field of photovoltaic junction boxes, the photovoltaic module junction box comprises a junction box body, an air inlet pipe and an air outlet pipe are fixedly arranged at the positions, corresponding to heat dissipation fins, of the two sides of the junction box body respectively, and one end of the air inlet pipe and one end of the air outlet pipe are communicated with the two ends of a connecting pipe on one side of the junction box body respectively; an air inlet fan and an exhaust fan are fixedly arranged on fixing shafts in one ends of the air inlet pipe and the air outlet pipe respectively, a fixed filter screen is fixedly arranged at one end of the air outlet pipe, a circular filter screen is arranged in the middle of the sliding plate, a cleaning mechanism is arranged on one side of the sliding plate, and a heat dissipation mechanism is arranged on one side of the junction box body. Through the arrangement of the expansion tank, the piston rod, the separation plate and the connecting elastic piece, the starting and stopping of the motor are controlled, through the cooperative use of the rotating plate and the sliding stop block, external air enters the junction box main body, and hot air in the junction box main body is replaced.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic junction box technology, specifically a photovoltaic module junction box with high heat dissipation efficiency. Background Technology

[0002] In the electrical connection technology of solar power generation systems, solar photovoltaic junction boxes are typically used to connect photovoltaic modules and inverters. Their main function is to connect and protect solar photovoltaic modules, connect the power generated by the solar cells to external lines, and conduct the current generated by the photovoltaic modules. In actual use, a large current flows continuously inside the junction box. As the current flows through the electrical components inside the junction box, it generates a lot of heat. Since junction boxes are generally sealed structures, their heat dissipation performance is poor. If this heat accumulates inside the junction box for a long time, it will keep the junction box in a high-temperature environment for a long time. This will shorten the service life of the junction box and also pose a safety hazard to the photovoltaic panels.

[0003] Chinese patent CN219678409U discloses a photovoltaic junction box with a heat dissipation structure. This junction box utilizes a heat dissipation component; multiple cooling fans rotate simultaneously to expel the gas inside the junction box and bring in gas from outside for exchange and heat dissipation. A dustproof auxiliary component is included; during the exchange of air between the inside and outside, air passes through vents and air vents. A dustproof and breathable mesh filters the air as it passes through these vents and air vents, providing basic filtration of large dust particles in the air entering and exiting the vents and air vents. The interception prevents excessive dust accumulation inside the junction box during gas exchange. However, in actual use, the junction box requires regular cleaning of the dustproof and ventilated mesh by staff, increasing their workload. If the dustproof and ventilated mesh is not cleaned in time, it will become clogged, preventing external air from cooling the junction box. In addition, the junction box is equipped with several cooling fans, but there are no control components to control the cooling fans. This means that the cooling fans are always running when the junction box does not need to cool down, resulting in energy waste.

[0004] Based on this, a photovoltaic module junction box with high heat dissipation efficiency is now provided, which can eliminate the drawbacks of existing devices. Summary of the Invention

[0005] The purpose of this invention is to provide a photovoltaic module junction box with high heat dissipation efficiency, so as to solve the problems in the prior art that the dustproof and breathable mesh cannot be automatically cleaned and the cooling fan cannot be controlled.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A photovoltaic module junction box with high heat dissipation efficiency includes a junction box body. A sealing base plate is affixed to the bottom of the junction box body and fixedly disposed inside the bottom of an outer casing. A fixing component for securing the junction box body is disposed inside the sealing base plate. A top cover is affixed to the top of the outer casing. Several wire harnesses are disposed inside the junction box body. Several heat dissipation fins are fixedly disposed on both sides of the junction box body. An air inlet pipe and an air outlet pipe are fixedly disposed on both sides of the junction box body at positions corresponding to the heat dissipation fins. One end of each air inlet pipe and air outlet pipe is connected to a portion of the junction box body. The two ends of the side connecting pipe are connected. An intake fan and an exhaust fan are respectively fixed on the fixed shaft inside one end of the intake pipe and the exhaust pipe. The fixed shaft is rotatably mounted on the fixed frame inside the intake pipe and the exhaust pipe. A drive assembly for rotating the fixed shaft is provided on one side of the junction box body. A fixed filter screen is fixedly provided on one end of the exhaust pipe. A sliding plate is slidably provided on one end of the intake pipe. A circular filter screen is provided in the middle of the sliding plate. A cleaning mechanism for cleaning the circular filter screen is provided on one side of the sliding plate. A heat dissipation mechanism for heat dissipation inside the junction box body is provided on one side of the junction box body.

[0008] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In one alternative: the fixing component includes a limiting block and a limiting frame. Several limiting blocks are fixedly mounted on the junction box body. The limiting frame is slidably mounted in the mounting grooves around the sealing base plate corresponding to the positions of the limiting blocks. One side of the limiting frame is fixedly connected to one end of a tension spring, and the other end of the tension spring is fixedly connected to one side of the mounting groove.

[0010] In one alternative: the drive assembly includes an electric motor, which is fixedly mounted on the upper end of a mounting plate on one side of the junction box body. Two drive wheels on the output shaft of the electric motor are respectively connected to driven wheels on two fixed shafts via a first belt and a second belt. A control assembly for controlling the start of the electric motor is provided on one side of the junction box body.

[0011] In one alternative embodiment: the control component includes an expansion tank and a connecting spring. The connecting spring is fixedly mounted on the motor input end and is in close contact with one end of the power supply pipe. Both the motor input end and one end of the power supply pipe are located inside a fixed box. The fixed box is fixedly mounted on one side of the junction box body. The expansion tank is fixedly mounted inside one end of the junction box body. A piston rod is slidably mounted inside the expansion tank. The expansion tank contains expanding gas. A separation plate is fixedly mounted on the output end of the piston rod. A rectangular through hole is provided on one side of the separation plate.

[0012] In one alternative embodiment: the cleaning mechanism includes a brush rod, which is fixedly mounted on one end of a mounting shaft. A support frame is rotatably mounted on the mounting shaft, and the support frame is fixedly mounted inside one end of the air intake pipe. The brush rod has several bristles on the side near the circular filter screen. A sleeve wheel is fixedly mounted on one end of the mounting shaft, and a conical friction wheel is tightly attached to the inner side of the sleeve wheel. The conical friction wheel is fixedly mounted on one end of the fixed shaft where the air intake fan is located. One side of the sliding plate is fixedly connected to the output end of several spring telescopic rods, and the several spring telescopic rods are fixedly mounted inside the air intake pipe.

[0013] In one alternative: a first magnet and a second magnet are respectively fixed at one end of the conical friction wheel and the inner end of the sleeve wheel.

[0014] In one alternative embodiment: the heat dissipation mechanism includes fixed pipes and connecting pipes. Several fixed pipes are connected to the connecting pipe. Each fixed pipe has a rotating plate rotatably mounted on a mounting post inside. One end of the rotating plate is fixedly connected to a torsion spring, and the other end of the torsion spring is fixedly connected to the mounting post. The connecting pipe is fixedly installed in a mounting hole on one side of the junction box body opposite to the fixed pipe. One end of the connecting pipe is connected to an air inlet pipe. The connecting pipe has an air outlet. A sliding stop is slidably installed inside the connecting pipe. One side of the sliding stop is fixedly connected to one end of a return spring, and the other end of the return spring is fixedly connected to one side of the mounting bracket inside one end of the connecting pipe.

[0015] In one alternative: several circular perforations are provided on one side of several of the heat dissipation fins.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. This invention, by incorporating an expansion tank, piston rod, separation plate, and connecting spring, enables control of the motor's start and stop based on internal temperature changes within the junction box, reducing energy waste. Simultaneously, the motor drives the intake and exhaust fans, with the intake fan delivering external air to the intake pipe, connecting pipe, and exhaust pipe. This heats several cooling fins on one side of the junction box, thus dissipating heat from the main body. Furthermore, the smaller cross-sectional area of ​​the connecting pipe's middle section compared to the intake and exhaust pipes increases the airflow velocity. The combined use of the rotating plate and sliding stop allows external air to enter the junction box, displacing the hot air inside and further enhancing heat dissipation, thereby increasing the practicality of the junction box.

[0018] 2. This invention features a circular filter screen on one side of a sliding plate, which is slidably positioned at one end of the air intake pipe. A brush rod and a sleeve are respectively installed at both ends of the mounting shaft. When the circular filter screen becomes clogged, the sliding plate slides at one end of the air intake pipe, causing the conical friction wheel to come into close contact with the sleeve. This drives the brush rod to rotate and automatically clean the circular filter screen. After cleaning, the filter screen automatically resets, reducing wear on the brush bristles on one side and thus increasing the practicality of the junction box. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the internal structure of the outer casing of the present invention.

[0021] Figure 3 This is a schematic diagram of the heat dissipation fin structure of the present invention.

[0022] Figure 4 This is a schematic diagram of the internal structure of the air inlet pipe and air outlet pipe of the present invention.

[0023] Figure 5 This is a schematic diagram of the limiting frame and connecting pipe structure of the present invention.

[0024] Figure 6 This is a schematic diagram of the internal structure of the connecting pipe of the present invention.

[0025] Figure 7 This is a schematic diagram of the connecting spring structure of the present invention.

[0026] Figure 8 This is a schematic diagram of the internal structure of the fixed tube of the present invention.

[0027] Figure label annotations: 11 Junction box body, 12 Sealed base plate, 13 Outer box, 14 Top cover, 15 Limiting block, 16 Limiting frame, 17 Tension spring, 18 Wiring harness, 19 Heat dissipation fins, 20 Inlet pipe, 21 Sliding plate, 22 Spring telescopic rod, 23 Inlet fan, 24 Motor, 25 Brush rod, 26 Conical friction wheel, 27 Sleeve wheel, 28 Connecting pipe, 29 Exhaust pipe, 30 Fixed filter screen, 31 Exhaust fan, 32 Expansion tank, 33 Piston rod, 34 Separation plate, 35 Connecting spring, 36 Fixed pipe, 37 Rotating plate, 38 Torsion spring, 39 Connecting pipe, 40 Sliding stop, 41 Return spring. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] In one embodiment, such as Figures 1-8As shown, a photovoltaic module junction box with high heat dissipation efficiency includes a junction box body 11. A sealing base plate 12 is affixed to the bottom of the junction box body 11 and fixedly mounted inside the bottom of an outer casing 13. A fixing component for securing the junction box body 11 is located inside the sealing base plate 12. A top cover 14 is affixed to the top of the outer casing 13. Several wire harnesses 18 are located inside the junction box body 11. Several heat dissipation fins 19 are fixedly mounted on both sides of the junction box body 11. An air inlet pipe 20 and an air outlet pipe 29 are fixedly mounted on both sides of the junction box body 11 at positions corresponding to the heat dissipation fins 19. One end of each air inlet pipe 20 and air outlet pipe 29 is connected to both ends of a connecting pipe 28 on one side of the junction box body 11. An intake fan 23 and an exhaust fan 31 are respectively fixed on the internal fixed shaft of the intake pipe 20 and the exhaust pipe 29. The fixed shaft is rotatably mounted on the internal fixed frame of the intake pipe 20 and the exhaust pipe 29. A drive assembly for rotating the fixed shaft is provided on one side of the junction box body 11. A fixed filter screen 30 is fixedly provided on one end of the exhaust pipe 29. A sliding plate 21 is slidably provided on one end of the intake pipe 20. A circular filter screen is provided in the middle of the sliding plate 21. A cleaning mechanism for cleaning the circular filter screen is provided on one side of the sliding plate 21. A heat dissipation mechanism for heat dissipation inside the junction box body 11 is provided on one side of the junction box body 11. The cleaning mechanism facilitates automatic cleaning of the circular filter screen, and the heat dissipation mechanism facilitates increased heat dissipation of the junction box body 11.

[0031] The fixing assembly includes limiting blocks 15 and limiting frames 16. Several limiting blocks 15 are fixedly mounted on the junction box body 11. The limiting frames 16 are slidably mounted in the mounting grooves around the sealing base plate 12 at positions corresponding to the limiting blocks 15. One side of the limiting frame 16 is fixedly connected to one end of a tension spring 17, and the other end of the tension spring 17 is fixedly connected to one side of the mounting groove. In use, several circuit components are installed inside the upper part of the junction box body 11. Then, the bottom end of the junction box body 11 is aligned with the upper end of the sealing base plate 12. Then, the junction box body 11 is pressed, causing the limiting blocks 15 to push the limiting frames 16 to slide. When the bottom end of the junction box body 11 is in close contact with the upper end of the sealing base plate 12, the limiting frames 16 return to their initial position under the action of the tension spring 17, so that one end of the limiting frames 16 is in close contact with the upper end of the limiting blocks 15, thereby fixing the junction box body 11.

[0032] The drive assembly includes a motor 24, which is fixedly mounted on the upper end of a mounting plate on one side of the junction box body 11. Two drive wheels on the output shaft of the motor 24 are respectively connected to driven wheels on two fixed shafts via a first belt and a second belt. A control assembly for starting the motor 24 is provided on one side of the junction box body 11. In use, the motor 24 is started by controlling the control assembly. The output end of the motor 24 drives the two drive wheels to rotate. The two drive wheels drive the fixed shafts to rotate via the first belt and the second belt, respectively. The two fixed shafts drive the intake fan 23 and the exhaust fan 31 to rotate. The intake fan 23 transmits external air to the inside of the intake pipe 20, which is then transmitted through the connecting pipe 28 and the exhaust pipe 29, and then discharged through one end of the exhaust pipe 29. At the same time, the heat dissipation fins 19 transfer the heat inside the junction box body 11 to the heat dissipation fins 19. When the air inside the intake pipe 20, the connecting pipe 28 and the exhaust pipe 29 flows, it can carry the heat on the heat dissipation fins 19, thereby dissipating heat from the inside of the junction box body 11.

[0033] The control component includes an expansion tank 32 and a connecting spring 35. The connecting spring 35 is fixedly mounted on the input end of the motor 24 and is in close contact with one end of the power supply pipe. Both the input end of the motor 24 and one end of the power supply pipe are located inside a fixed box, which is fixedly mounted on one side of the junction box body 11. The expansion tank 32 is fixedly mounted inside one end of the junction box body 11. A piston rod 33 is slidably mounted inside the expansion tank 32. The expansion tank 32 contains expanding gas. A separation plate 34 is fixedly mounted on the output end of the piston rod 33. A rectangular perforation is provided on one side of the separation plate 34. During use, when the internal temperature of the junction box body 11 rises, the expanding gas inside the expansion tank 32 expands due to heat, causing the expanding gas to push... The piston rod 33 slides, and the expanding gas here can be selected according to actual use. At the same time, the expansion tank 32 can be made of copper with good thermal conductivity, which can be selected according to actual use. When the piston rod 33 slides, it drives the separation plate 34 to move. When the rectangular perforation on one side of the separation plate 34 moves to the position corresponding to the connecting spring 35, the connecting spring 35 contacts one end of the power supply pipe. The input end of the power supply pipe is electrically connected to the output end of the external power supply, so that the motor 24 starts. When the internal temperature of the junction box body 11 decreases, the expanding gas inside the expansion tank 32 expands and contracts due to heat, causing the piston rod 33 to drive the separation plate 34 back to the initial position, so that the separation plate 34 separates the connecting spring 35 from one end of the power supply pipe, thereby stopping the motor 24 from rotating.

[0034] The cleaning mechanism includes a brush rod 25, which is fixedly mounted on one end of a mounting shaft. A support frame is rotatably mounted on the mounting shaft, and the support frame is fixedly mounted inside one end of the air intake pipe 20. The brush rod 25 has several bristles near the circular filter screen. A sleeve wheel 27 is fixedly mounted on one end of the mounting shaft, and a conical friction wheel 26 is tightly attached to the inner side of the sleeve wheel 27. The conical friction wheel 26 is fixedly mounted on one end of the fixed shaft where the air intake fan 23 is located. One side of the sliding plate 21 is fixedly connected to the output end of several spring telescopic rods 22, which are fixedly mounted inside the air intake pipe 20. In use, when... When the circular filter screen on one side of the sliding plate 21 is blocked, the intake fan 23 draws in air, creating negative pressure at one end of the intake pipe 20. This causes the sliding plate 21 to move along the axis of the spring telescopic rod 22. As the sliding plate 21 moves, it drives the brush rod 25 to move. When the inner side of the sleeve wheel 27 is in close contact with the conical friction wheel 26, the fixed shaft drives the sleeve wheel 27 to rotate through the conical friction wheel 26. The sleeve wheel 27 drives the brush rod 25 to rotate through the mounting shaft, thereby cleaning the circular filter screen. After cleaning, the sliding plate 21 returns to its initial position under the action of the spring telescopic rod 22, the conical friction wheel 26 separates from the sleeve wheel 27, and the brush rod 25 stops rotating.

[0035] The tapered friction wheel 26 and the inner end of the sleeve wheel 27 are respectively fixed with a first magnet and a second magnet. In use, the tapered friction wheel 26 and the sleeve wheel 27 are made to fit tightly together, thereby driving the brush rod 25 to rotate.

[0036] The heat dissipation mechanism includes fixed pipes 36 and connecting pipes 39. Several fixed pipes 36 are connected to a connecting pipe 28. Each fixed pipe 36 has a rotating plate 37 rotatably mounted on a mounting post inside. One end of a torsion spring 38 is fixedly connected to the inside of the rotating plate 37, and the other end of the torsion spring 38 is fixedly connected to the mounting post. The connecting pipe 39 is fixedly installed in a mounting hole on one side of the junction box body 11 opposite to the fixed pipes 36. One end of the connecting pipe 39 is connected to the air intake pipe 20. The connecting pipe 39 has an air outlet. A sliding stop 40 is slidably mounted inside the connecting pipe 39. One side of the sliding stop 40 is fixedly connected to one end of a return spring 41, and the other end of the return spring 41 is fixedly connected to one side of the mounting bracket inside the connecting pipe 39. In use, when air is supplied to the air intake pipe 20 of the air intake fan 23 box, the air inside the air intake pipe 20 is transmitted to the air intake pipe 20 via the connecting pipe 28. Inside the exhaust pipe 29, because the cross-sectional area of ​​the middle part of the connecting pipe 28 is smaller than that of the inlet pipe 20 and the exhaust pipe 29, according to the Venturi effect, the air velocity in the middle part of the connecting pipe 28 increases, causing a suction force to be generated at one end of the fixed pipe 36. When the suction force is large, the rotating plate 37 rotates, causing one end of the fixed pipe 36 to open, thereby drawing air out of the junction box body 11. Since the inside of the junction box body 11 is in a sealed state, a negative pressure is generated inside the junction box body 11. At this time, the sliding block 40 slides inside the connecting pipe 39. When the sliding block 40 moves beyond the position of the exhaust hole, the air inside the inlet pipe 20 enters the inside of the junction box body 11, thereby replacing the air inside the junction box body 11. The hot air inside the junction box body 11 is discharged into the exhaust pipe 29 through the fixed pipe 36 and discharged outside the outer casing 13, thereby dissipating heat from the junction box body 11.

[0037] Example 2

[0038] The difference from Embodiment 1 is that: each of the heat dissipation fins 19 has a number of circular perforations on one side, which facilitates the rapid flow of air during use and increases the heat dissipation effect of the heat dissipation fins 19.

[0039] The above embodiment discloses a photovoltaic module junction box with high heat dissipation efficiency. When the internal temperature of the junction box body 11 is too high, the expansion gas inside the expansion tank 32 expands due to heat, causing the expansion gas to push the piston rod 33 to slide. As the piston rod 33 slides, it drives the separation plate 34 to move. When the rectangular perforation on one side of the separation plate 34 moves to the position corresponding to the connecting spring 35, the connecting spring 35 contacts one end of the power supply pipe. The input end of the power supply pipe is electrically connected to the output end of the external power supply, causing the motor 24 to start. The output end of the motor 24 drives two drive wheels to rotate. The two drive wheels are driven by a first belt and a second belt, respectively. The rotation of the fixed shafts drives the intake fan 23 and exhaust fan 31 to rotate. The intake fan 23 transfers outside air into the intake pipe 20, through the connecting pipe 28 and the exhaust pipe 29, and then exhausts it through one end of the exhaust pipe 29. At the same time, the heat dissipation fins 19 transfer heat from the inside of the junction box body 11 to the heat dissipation fins 19. The air flowing inside the intake pipe 20, connecting pipe 28 and exhaust pipe 29 can carry the heat on the heat dissipation fins 19, thereby dissipating heat from the inside of the junction box body 11. At the same time, the air velocity in the middle of the connecting pipe 28 increases, causing a suction force to be generated at one end of the fixed pipe 36. When the suction force is large, the rotating plate... Rotation 37 opens one end of the fixed pipe 36, thereby drawing air out of the junction box body 11. Since the junction box body 11 is sealed, a negative pressure is created inside. At this time, the sliding stop 40 slides inside the connecting pipe 39. When the sliding stop 40 moves beyond the air outlet position, air from the air inlet pipe 20 enters the junction box body 11, thus replacing the air inside. The hot air inside the junction box body 11 is then discharged through the fixed pipe 36 into the air outlet pipe 29 and out of the outer casing 13, thereby increasing the heat dissipation effect on the junction box body 11. When the circular filter screen on one side of the sliding plate 21 is blocked, the intake fan 23 draws in air, creating negative pressure at one end of the intake pipe 20. This causes the sliding plate 21 to move along the axis of the spring telescopic rod 22. As the sliding plate 21 moves, it drives the brush rod 25 to move. When the inner side of the sleeve wheel 27 is in close contact with the conical friction wheel 26, the fixed shaft drives the sleeve wheel 27 to rotate through the conical friction wheel 26. The sleeve wheel 27 drives the brush rod 25 to rotate through the mounting shaft, thereby cleaning the circular filter screen. After cleaning, the sliding plate 21 returns to its initial position under the action of the spring telescopic rod 22, the conical friction wheel 26 separates from the sleeve wheel 27, and the brush rod 25 stops rotating.

[0040] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A photovoltaic module junction box with high heat dissipation efficiency, comprising a junction box body (11), wherein a sealing base plate (12) is tightly abutted to the bottom of the junction box body (11), the sealing base plate (12) is fixedly disposed inside the bottom of an outer casing (13), a fixing component for fixing the junction box body (11) is disposed inside the sealing base plate (12), a top cover (14) is tightly abutted to the top of the outer casing (13), and a plurality of wire harnesses (18) are disposed inside the junction box body (11), characterized in that, Several heat dissipation fins (19) are fixedly provided on both sides of the junction box body (11). An air inlet pipe (20) and an air outlet pipe (29) are fixedly provided on both sides of the junction box body (11) at positions corresponding to the heat dissipation fins (19). One end of the air inlet pipe (20) and the air outlet pipe (29) are respectively connected to both ends of a connecting pipe (28) on one side of the junction box body (11). An air intake fan (23) and an exhaust fan (31) are respectively fixedly provided on a fixed shaft inside one end of the air inlet pipe (20) and the air outlet pipe (29). The fixed shaft is rotatably mounted on the air inlet pipe. On the internal fixing frame of (20) and the air outlet pipe (29), a drive assembly for driving the fixed shaft to rotate is provided on one side of the junction box body (11). A fixed filter screen (30) is fixedly provided at one end of the air outlet pipe (29). A sliding plate (21) is slidably provided at one end of the air inlet pipe (20). A circular filter screen is provided in the middle of the sliding plate (21). A cleaning mechanism for cleaning the circular filter screen is provided on one side of the sliding plate (21). A heat dissipation mechanism for heat dissipation inside the junction box body (11) is provided on one side of the junction box body (11).

2. A photovoltaic module junction box with high heat dissipation efficiency according to claim 1, characterized in that, The fixing component includes a limiting block (15) and a limiting frame (16). Several limiting blocks (15) are fixedly installed on the junction box body (11). The limiting frame (16) is slidably installed in the mounting grooves around the sealing base plate (12) at the positions corresponding to the limiting blocks (15). One side of the limiting frame (16) is fixedly connected to one end of a tension spring (17), and the other end of the tension spring (17) is fixedly connected to one side of the mounting groove.

3. A photovoltaic module junction box with high heat dissipation efficiency according to claim 1, characterized in that, The drive assembly includes a motor (24), which is fixedly mounted on the upper end of a mounting plate on one side of the junction box body (11). Two drive wheels on the output shaft of the motor (24) are respectively connected to driven wheels on two fixed shafts via a first belt and a second belt. A control assembly for controlling the start of the motor (24) is provided on one side of the junction box body (11).

4. A photovoltaic module junction box with high heat dissipation efficiency according to claim 3, characterized in that, The control component includes an expansion tank (32) and a connecting spring (35). The connecting spring (35) is fixedly installed at the input end of the motor (24). The connecting spring (35) is in close contact with one end of the power supply pipe. The input end of the motor (24) and one end of the power supply pipe are both located inside a fixed box. The fixed box is fixedly installed on one side of the junction box body (11). The expansion tank (32) is fixedly installed at one end inside the junction box body (11). A piston rod (33) is slidably installed inside the expansion tank (32). The expansion tank (32) contains expanding gas. A separation plate (34) is fixedly installed on the output end of the piston rod (33). A rectangular perforation is provided on one side of the separation plate (34).

5. A photovoltaic module junction box with high heat dissipation efficiency according to claim 1, characterized in that, The cleaning mechanism includes a brush rod (25), which is fixedly mounted on one end of a mounting shaft. A support frame is rotatably mounted on the mounting shaft. The support frame is fixedly mounted inside one end of the air intake pipe (20). The brush rod (25) has several bristles on the side near the circular filter screen. A sleeve wheel (27) is fixedly mounted on one end of the mounting shaft. A conical friction wheel (26) is tightly attached to the inner side of the sleeve wheel (27). The conical friction wheel (26) is fixedly mounted on one end of the fixed shaft where the air intake fan (23) is located. One side of the sliding plate (21) is fixedly connected to the output end of several spring telescopic rods (22). Several spring telescopic rods (22) are fixedly mounted inside the air intake pipe (20).

6. A photovoltaic module junction box with high heat dissipation efficiency according to claim 5, characterized in that, The tapered friction wheel (26) has a first magnet and a second magnet fixedly installed at one end and the inside of the sleeve wheel (27), respectively.

7. A photovoltaic module junction box with high heat dissipation efficiency according to claim 1, characterized in that, The heat dissipation mechanism includes a fixed tube (36) and a connecting tube (39). Several fixed tubes (36) are connected on the connecting tube (28). A rotating plate (37) is rotatably mounted on the mounting post inside the fixed tube (36). The rotating plate (37) is fixedly connected to one end of a torsion spring (38). The other end of the torsion spring (38) is fixedly connected to the mounting post. The connecting tube (39) is fixedly installed in the mounting hole on one side of the junction box body (11) opposite to the fixed tube (36). One end of the connecting tube (39) is connected to the air inlet pipe (20). The connecting tube (39) is provided with an air outlet. A sliding stop (40) is slidably provided inside the connecting tube (39). One side of the sliding stop (40) is fixedly connected to one end of a return spring (41). The other end of the return spring (41) is fixedly connected to one side of the mounting bracket inside one end of the connecting tube (39).

8. A photovoltaic module junction box with high heat dissipation efficiency according to claim 1, characterized in that, Several circular perforations are provided on one side of each of the heat dissipation fins (19).

Images