Solar junction box with good heat dissipation performance

Abstract

The utility model discloses a solar junction box with good heat dissipation, which belongs to the field of solar photovoltaic technology and comprises a box body and a box cover, wiring terminals are mounted in the box body, a frame is communicated with the inside of the box body, the inner wall of the frame is slidably connected with a filter screen, the upper surface of the box cover is connected with an exhaust pipe, and the exhaust pipe is connected with the box cover. A fan is installed in the exhaust pipe, the outer surface of the hinge plate is connected with a first magnet and a second magnet, through cooperation of the filter screen, the fan, the exhaust pipe and the hinge plate, hot air in the box body and the box cover is driven by the fan to flow outwards, negative pressure is generated in the box body and the box cover after the air flows outwards, and the negative pressure is generated in the box body and the box cover; external air flows into the box body and the box cover, the outwards-flowing air pushes the page plate to turn upwards, hot air is exhausted from the exhaust pipe, the first magnet and the second magnet on the page plate are separated, air circulates and flows in the box body and the box cover, the internal wiring terminal is cooled, and the service life of the wiring terminal is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of solar photovoltaic, in particular to a solar junction box with good heat dissipation performance. Background Art

[0002] A solar junction box is an important component of a solar cell module. It is located between the solar cell array and the solar charging control device. Its main functions are to connect and protect the solar photovoltaic module, connect the electricity generated by the solar cells to the external circuit, and conduct the current generated by the photovoltaic module. The junction box is also responsible for connecting the electricity generated by the solar cells to the external circuit. In solar applications, the junction box not only plays a role in connection and transmission, but also protects the module to ensure the safe and stable operation of the system.

[0003] When in use, the solar junction box is directly connected to the solar substrate. The terminal in the solar junction box generates heat when transmitting current. Since most of the existing designs of solar cell boxes use open heat dissipation holes, it may cause external dust or mosquitoes to enter, resulting in dust covering the surface of the terminal, preventing the heat inside the terminal from volatilizing outward. Prolonged high temperature may cause the terminal to overheat and be damaged or shorten its service life. To solve this technical problem, the utility model proposes a solar junction box with good heat dissipation performance. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a solar junction box with good heat dissipation performance, which can effectively solve the problems mentioned in the background art.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A solar junction box with good heat dissipation performance, including a box body and a box cover. A terminal is installed inside the box body. The box cover is arranged above the box body. A frame is connected to the outer surface of the box body. The frame is in communication with the inside of the box body. A filter screen is slidably connected to the inner wall of the frame. A fixing mechanism is arranged inside the frame. An exhaust pipe is connected to the upper surface of the box cover. The exhaust pipe is in communication with the inside of the box cover. A fan is installed inside the exhaust pipe. A plurality of vanes are rotatably connected to the inner side of the exhaust pipe. Magnets I and II are connected to the outer surface of the vane. Magnets I and II attract each other magnetically.

[0007] Preferably, there are two of the plurality of vanes, and the two vanes are arranged at equal distances up and down.

[0008] Preferably, a rain cap is installed at the top of the exhaust pipe, and the rain cap has an inclined angle.

[0009] Preferably, a top ring is connected to the upper surface of the box body, a sealing groove is formed inside the box cover, a sealing gasket is in contact with the inner wall of the sealing groove, the sealing gasket is made of rubber, and the outer surface of the sealing gasket is in contact with the outer surface of the top ring.

[0010] Preferably, an aggregation cover is connected to the inner wall of the box cover, the aggregation cover is communicated with the exhaust pipe, and the aggregation cover has an inclination angle. The aggregation cover is located above the terminal block, and a plurality of heat dissipation fins are simultaneously connected to the upper surface of the box cover, and the plurality of heat dissipation fins are arranged at equal intervals.

[0011] Preferably, the fixing mechanism includes a leaf spring, the leaf spring is connected to the inner wall of the frame, and a convex block is connected to the outer surface of the leaf spring.

[0012] Preferably, a groove is formed on one side of the filter screen, and the inner wall of the groove is in contact with the outer surface of the convex block.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] In the utility model, through the cooperation between the filter screen, the fan, the exhaust pipe and the page plate, the hot air inside the box body and the box cover is driven by the fan to flow to the outside. After the air flows out, negative pressure is generated inside the box body and the box cover, and the outside air flows into the box body and the box cover. The air reaches the clean degree after being filtered by the filter screen and then enters the box body and the box cover. The air flowing outwards pushes the page plate to turn upwards, and the hot air is discharged from the exhaust pipe. The magnet one on the page plate is separated from the magnet two, and the air circulates and flows inside the box body and the box cover to cool the internal terminal block and improve the service life of the terminal block.

[0015] In the utility model, through the cooperation between the rainproof cap and the exhaust pipe, the exhaust pipe supports the rainproof cap to make the rainproof cap stable. The rainproof cap is located at the top of the exhaust pipe, which can prevent rainwater from entering the box cover through the exhaust pipe and causing the terminal block to short-circuit. The rainproof cap guides the rainwater to be discharged outside the exhaust pipe, improving the safety of the terminal block. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the solar junction box with good heat dissipation of the present utility model;

[0017] Figure 2 is a schematic diagram of the internal structure of the box body in the solar junction box with good heat dissipation of the present utility model;

[0018] Figure 3 is a schematic diagram of the internal structure of the frame of the solar junction box with good heat dissipation of the present utility model;

[0019] Figure 4Schematic diagram of the overall three-dimensional structure of the filter screen in the solar junction box with good heat dissipation of the present utility model;

[0020] Figure 5 Schematic diagram of the internal structure of the lid of the solar junction box with good heat dissipation of the present utility model;

[0021] Figure 6 Schematic diagram of the planar structure of the page board in the solar junction box with good heat dissipation of the present utility model.

[0022] In the figure: 1. Box body; 2. Lid; 3. Wiring terminal; 4. Frame; 5. Filter screen; 6. Fixing mechanism; 601. Leaf spring; 602. Protrusion; 603. Groove; 7. Exhaust pipe; 8. Fan; 9. Page board; 10. Magnet 1; 11. Magnet 2; 12. Rainproof cap; 13. Top ring; 14. Sealing groove; 15. Sealing gasket; 16. Aggregation cover; 17. Heat dissipation fin. Specific embodiments

[0023] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] As Figure 1-6 shown, the solar junction box with good heat dissipation includes a box body 1 and a lid 2. A wiring terminal 3 is installed inside the box body 1, and the connecting wire is fixed through the wiring terminal 3. The lid 2 is arranged above the box body 1, and a complete junction box is formed inside after the box body 1 and the lid 2 are connected.

[0025] A frame 4 is connected to the outer surface of the box body 1. The frame 4 is in communication with the inside of the box body 1. The inner wall of the frame 4 is slidably connected with a filter screen 5. The filter screen 5 is supported by the frame 4. The filter screen 5 can be pulled out from the inside of the frame 4. After being pulled out, it is convenient to clean the filter screen 5. The filter screen 5 can block external dust or mosquitoes from entering the inside of the box body 1 and the lid 2, so that pure air can pass through the filter screen 5 and enter the inside of the box body 1 and the lid 2 to flow, taking away the internal heat.

[0026] An exhaust pipe 7 is connected to the upper surface of the lid 2. The exhaust pipe 7 is in communication with the interior of the lid 2. A fan 8 is installed inside the exhaust pipe 7. By rotating the fan 8, the air flow inside is accelerated, and the speed of replacing the internal air is increased. A plurality of vanes 9 are rotatably connected to the inner side of the exhaust pipe 7. Magnets 10 and 11 are connected to the outer surface of the vanes 9. Magnets 10 and 11 attract each other magnetically. There are two vanes 9, and the two vanes 9 are arranged at equal distances up and down. When the temperature inside the box body 1 and the lid 2 is normal, there is no need for the fan 8 to rotate. Without the push of flowing air, the vanes 9 will freely droop downward, increasing the stability of the vanes 9. Magnets 10 and 11 are arranged with opposite polarities. By attracting each other, the vanes 9 cannot swing easily, and can prevent external dust or mosquitoes from entering through the exhaust pipe 7. A rain cap 12 is installed at the top of the exhaust pipe 7, and the rain cap 12 has an inclined angle. The rain cap 12 prevents rainwater from entering the interior of the lid 2 through the exhaust pipe 7 during rainy days, causing the terminal 3 to short-circuit.

[0027] A top ring 13 is connected to the upper surface of the box body 1. A sealing groove 14 is provided on the inner side of the lid 2. A sealing gasket 15 is in contact with the inner wall of the sealing groove 14. The sealing gasket 15 is made of rubber. The outer surface of the sealing gasket 15 is in contact with the outer surface of the top ring 13. By the contact between the top ring 13 and the sealing gasket 15, a better squeezing effect can be achieved on the sealing gasket 15, improving the sealing effect. The sealing groove 14 can prevent the sealing gasket 15 from deforming when being squeezed by the top ring 13.

[0028] An aggregation cover 16 is connected to the inner wall of the lid 2. The aggregation cover 16 is in communication with the exhaust pipe 7, and the aggregation cover 16 has an inclined angle. The aggregation cover 16 is located above the terminal 3. By guiding the heat dissipated by the terminal 3 to the position of the exhaust pipe 7 through the aggregation cover 16, it is convenient to discharge the heat inside the box body 1 and the lid 2 to the outside. A plurality of heat dissipation fins 17 are also connected to the upper surface of the lid 2, and the plurality of heat dissipation fins 17 are arranged at equal distances. The heat dissipation fins 17 can increase the contact area between the lid 2 and the external air, improving the heat dissipation effect of the lid 2.

[0029] A fixing mechanism 6 is arranged inside the frame 4. The stability of the filter screen 5 is improved through the fixing mechanism 6. The fixing mechanism 6 includes a leaf spring 601. The leaf spring 601 is connected to the inner wall of the frame 4. A convex block 602 is connected to the outer surface of the leaf spring 601. The leaf spring 601 has elasticity. When the convex block 602 is pushed by an external force, the leaf spring 601 drives the convex block 602 to move. After the external force on the convex block 602 is removed, the leaf spring 601 pushes the push block to reset. A groove 603 is provided on one side of the filter screen 5. The inner wall of the groove 603 is in contact with the outer surface of the convex block 602. By the contact between the convex block 602 and the groove 603, the convex block 602 forms a block on the groove 603, and the movement of the filter screen 5 can be restricted.

[0030] It should be noted that in actual use of this device, first place the box cover 2 above the box body 1 and then lock them together. At the same time, the top ring 13 squeezes the sealing gasket 15 to seal the connection between the box body 1 and the box cover 2. Subsequently, insert the filter net 5 into the interior of the frame 4. Then, one end of the filter net 5 pushes the convex block 602 to move outward. After reaching the groove 603, the leaf spring 601 pushes the convex block 602 into contact with the groove 603. When the temperature inside the box body 1 and the box cover 2 is too high, the fan 8 starts to drive the hot air inside the box body 1 and the box cover 2 to flow outward. At the same time, a negative pressure is generated inside the box body 1 and the box cover 2, and the outside air enters the box body 1 and the box cover 2 after being filtered by the filter net 5. The air forms a circulating flow to cool the internal terminal 3. The air flowing outward is guided by the exhaust pipe 7 to push the flap 9 to flip. At the same time, the first magnet 10 is separated from the second magnet 11. After the temperature inside the box body 1 and the box cover 2 returns to normal, the flap 9 automatically droops downward, and at the same time, the first magnet 10 and the second magnet 11 are adsorbed to each other.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A solar junction box with good heat dissipation performance, comprising a box body (1) and a box cover (2), characterized in that: A wiring terminal (3) is installed inside the box body (1). The box cover (2) is arranged above the box body (1). A frame (4) is connected to the outer surface of the box body (1). The frame (4) is in communication with the inside of the box body (1). A filter screen (5) is slidably connected to the inner wall of the frame (4). A fixing mechanism (6) is arranged inside the frame (4). An exhaust pipe (7) is connected to the upper surface of the box cover (2). The exhaust pipe (7) is in communication with the inside of the box cover (2). A fan (8) is installed inside the exhaust pipe (7). A plurality of vanes (9) are rotatably connected to the inner side of the exhaust pipe (7). A first magnet (10) and a second magnet (11) are connected to the outer surface of the vane (9). The first magnet (10) and the second magnet (11) attract each other magnetically.

2. The heat-dissipating solar junction box according to claim 1, wherein: A plurality of the vanes (9) are two, and the two vanes (9) are arranged at equal distances up and down.

3. The solar junction box with good heat dissipation according to claim 2, wherein: A rain cap (12) is installed at the top end of the exhaust pipe (7), and the rain cap (12) has an inclined angle.

4. The heat-dissipating solar junction box according to claim 1, wherein: A top ring (13) is connected to the upper surface of the box body (1). A sealing groove (14) is formed inside the box cover (2). A sealing gasket (15) is in contact with the inner wall of the sealing groove (14). The sealing gasket (15) is made of rubber. The outer surface of the sealing gasket (15) is in contact with the outer surface of the top ring (13).

5. The solar junction box with good heat dissipation according to claim 1, characterized in that: An aggregation cover (16) is connected to the inner wall of the box cover (2). The aggregation cover (16) is in communication with the exhaust pipe (7), and the aggregation cover (16) has an inclined angle. The aggregation cover (16) is located above the wiring terminal (3). A plurality of heat dissipation fins (17) are simultaneously connected to the upper surface of the box cover (2), and the plurality of heat dissipation fins (17) are arranged at equal distances.

6. The heat-dissipating solar junction box according to claim 1, wherein: The fixing mechanism (6) includes a leaf spring (601). The leaf spring (601) is connected to the inner wall of the frame (4). A convex block (602) is connected to the outer surface of the leaf spring (601).

7. The solar junction box with good heat dissipation according to claim 6, wherein: A groove (603) is formed on one side of the filter screen (5). The inner wall of the groove (603) is in contact with the outer surface of the convex block (602).

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