Photovoltaic junction box

Abstract

The utility model relates to the technical field of photovoltaic assembly installation, in particular to a photovoltaic junction box which is installed on a junction box main body, a wire inserting pipe is arranged on one side of the outer surface of the junction box main body, and a heat dissipation structure is sleeved on the outer surface of the wire inserting pipe. Through the heat dissipation structure, when the junction box main body works, a connecting wire penetrates through a wire inserting pipe from a wire inserting opening and is connected with a wiring assembly, then the device is fixed on a photovoltaic panel to work, and meanwhile, an exhaust fan is started, so that the exhaust fan exhausts air from the outside and transmits the air to a heat dissipation plate through a connecting pipe; wind power is uniformly discharged from the heat dissipation openings after being dispersed by the plurality of ventilation pipes, the wind power can uniformly dissipate heat in the junction box main body through the strip-shaped grooves, and meanwhile, through the arrangement of the air outlets, hot air in the junction box main body can be discharged from the air outlets through the connection pipes, so that ventilation in the junction box main body is always kept; the internal temperature of the junction box main body is greatly reduced, and the junction box main body is effectively prevented from overhigh temperature and overload short circuit.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic module installation, and specifically relates to a photovoltaic junction box. Background Technique

[0002] Solar cell modules (also called solar panels) are the core part of a solar power generation system and also the most important part. Their function is to convert solar energy into electrical energy, which is either sent to a storage battery for storage or used to drive a load.

[0003] Existing photovoltaic junction boxes still have certain defects during installation. Since the photovoltaic junction box is installed on the back of the photovoltaic module during operation, when the photovoltaic module absorbs solar energy, the surface temperature rises. However, the existing internal potting technology of the junction box results in poor heat dissipation performance of the junction box, and overload short - circuit phenomena may occur after long - term use. Based on the existing technical deficiencies, the utility model designs a photovoltaic junction box. Content of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the utility model provides a photovoltaic junction box, which has the advantages of high - efficiency heat dissipation function of the junction box and preventing the occurrence of overload short - circuit phenomena.

[0005] The utility model provides the following technical solution: a photovoltaic junction box is installed on a junction box body. One side of the outer surface of the junction box body is provided with an insertion tube, and a heat dissipation structure is sleeved on the outer surface of the insertion tube. The heat dissipation structure includes a sleeve box and a heat dissipation plate. Partition plates are arranged on both sides inside the sleeve box. An air outlet is opened on one side of the outer surface of the sleeve box, and an exhaust fan is arranged on the other side of the outer surface of the sleeve box. The exhaust fan is provided with a connecting wire to be connected with an external power supply. Two connecting tubes are arranged on one side of the outer surface of the sleeve box, and one end of each of the two connecting tubes is connected to a heat dissipation plate. The heat dissipation plate is arranged inside the junction box body. A fixing plate is installed inside the heat dissipation plate. A plurality of ventilation tubes are installed on one side of the fixing plate. A plurality of heat dissipation openings are opened on one side of the outer surface of the plurality of ventilation tubes. A plurality of strip - shaped grooves corresponding to the ventilation tubes are opened at the bottom of the heat dissipation plate.

[0006] As a preferred technical solution of the utility model, one end of the insertion tube is communicated with an insertion port, and a wiring post is installed at the top of the extension of the junction box body. The wiring post is fixedly connected with the insertion port.

[0007] As a preferred technical solution of the utility model, a wiring component is arranged inside the junction box body, and the wiring component is arranged below the heat dissipation plate.

[0008] As a preferred technical solution of the utility model, a wiring opening is opened on one side of the outer surface of the junction box body. The wiring opening is fixedly connected with the insertion tube and is communicated with the insertion tube.

[0009] As a preferred technical solution of the present utility model, two through slots are provided on one side of the outer surface of the junction box body, and the two through slots are respectively fixedly connected to two connecting pipes.

[0010] As a preferred technical solution of the present utility model, both sides of the sleeve box communicate with the through slots, the sleeve box and the connecting pipes.

[0011] Compared with the prior art, the present utility model has the following beneficial effects:

[0012] 1. For this kind of photovoltaic junction box, through the heat dissipation structure, when the junction box body is working, the wiring passes through the wire inserting pipe from the wire inserting port and is connected to the wiring component, and then the device is fixed on the photovoltaic panel to start working. At the same time, the exhaust fan is started, so that the exhaust fan draws air from the outside and transmits it to the heat dissipation plate through the connecting pipe. After the wind force is dispersed by multiple ventilation pipes, it is evenly discharged from the heat dissipation port. Through the strip-shaped slots, the wind force can evenly dissipate heat inside the junction box body. At the same time, through the setting of the air outlet, the hot air inside the junction box body can be discharged from the air outlet through the connecting pipe, so as to always keep the inside of the junction box body ventilated, greatly reducing the temperature inside the junction box body and effectively preventing the occurrence of overheating, overload and short circuit phenomena in the junction box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the external structure of the present utility model;

[0014] Figure 2 is a schematic diagram of the wiring port structure of the present utility model;

[0015] Figure 3 is a schematic diagram of the wire inserting pipe structure of the present utility model;

[0016] Figure 4 is a schematic diagram of the exhaust fan structure of the present utility model;

[0017] Figure 5 is a schematic diagram of the heat dissipation port structure of the present utility model.

[0018] In the figure: 1. Junction box body; 2. Heat dissipation structure; 21. Sleeve box; 22. Partition board; 23. Air outlet; 24. Exhaust fan; 25. Connecting pipe; 26. Heat dissipation plate; 27. Strip-shaped slot; 28. Fixed plate; 29. Ventilation pipe; 210. Heat dissipation port; 3. Wiring terminal; 4. Wire inserting port; 5. Wiring port; 6. Through slot; 7. Wiring component; 8. Wire inserting pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0020] Please refer to Figures 1-5 , a photovoltaic junction box, which is installed on the junction box body 1. A wire inserting pipe 8 is arranged on one side of the outer surface of the junction box body 1, and a heat dissipation structure 2 is sleeved on the outer surface of the wire inserting pipe 8; the heat dissipation structure 2 includes a sleeve box 21 and a heat dissipation plate 26. Partition plates 22 are arranged on both sides inside the sleeve box 21. An air outlet 23 is opened on one side of the outer surface of the sleeve box 21. An air extractor 24 is arranged on the other side of the outer surface of the sleeve box 21. The air extractor 24 is provided with a connecting wire to be connected with an external power supply. Two connecting pipes 25 are arranged on one side of the outer surface of the sleeve box 21. One ends of the two connecting pipes 25 are connected to a heat dissipation plate 26. The heat dissipation plate 26 is arranged inside the junction box body 1. A fixing plate 28 is installed inside the heat dissipation plate 26. A plurality of ventilation pipes 29 are installed on one side of the fixing plate 28. A plurality of heat dissipation openings 210 are opened on one side of the outer surface of the plurality of ventilation pipes 29. A plurality of strip-shaped grooves 27 corresponding to the ventilation pipes 29 are opened at the bottom of the heat dissipation plate 26.

[0021] Please refer to Figures 1-3 , one end of the wire inserting pipe 8 is communicated with a wire inserting port 4. A wiring post 3 is installed at the top of the extension of the junction box body 1. The wiring post 3 is fixedly connected with the wire inserting port 4. A wiring component 7 is arranged inside the junction box body 1. The wiring component 7 is arranged below the heat dissipation plate 26. A wiring opening 5 is opened on one side of the outer surface of the junction box body 1. The wiring opening 5 is fixedly connected with the wire inserting pipe 8 and is communicated with the wire inserting pipe 8.

[0022] During wiring, the connecting wire is passed through the wire inserting port 4 and the wire inserting pipe 8 and then pulled into the junction box body 1 and is spot welded to the wiring component 7.

[0023] Please refer to Figures 2-5 , two through grooves 6 are opened on one side of the outer surface of the junction box body 1. The two through grooves 6 are respectively fixedly connected with the two connecting pipes 25. Both sides of the sleeve box 21 are communicated with the through grooves 6, the sleeve box 21 and the connecting pipes 25.

[0024] The air extractor 24 extracts air from the outside and transmits it to the heat dissipation plate 26 through the connecting pipe 25. After the wind force is dispersed by the plurality of ventilation pipes 29, it is evenly discharged from the heat dissipation openings 210. Through the strip-shaped grooves 27, the wind force can evenly dissipate heat inside the junction box body 1. At the same time, through the setting of the air outlet 23, the hot air inside the junction box body 1 can be discharged from the air outlet 23 through the connecting pipe 25, so as to always keep the inside of the junction box body 1 ventilated.

[0025] Working principle: When a photovoltaic junction box is in use, in the initial state, first pass the connecting wire through the wire insertion port 4 and the wire insertion tube 8 and then pull it into the junction box body 1 and perform spot welding connection with the wiring component 7. Subsequently, after connecting multiple devices and fixing them on the back of the photovoltaic panel, when the photovoltaic panel starts working, turn on the exhaust fan 24 of the device, so that the exhaust fan 24 sucks air from the outside and transmits it to the heat dissipation plate 26 through the connecting pipe 25. The wind force is dispersed by multiple ventilation pipes 29 and evenly discharged from the heat dissipation ports 210. Through the strip-shaped grooves 27, the wind force can evenly dissipate heat inside the junction box body 1. At the same time, through the setting of the air outlet 23, the hot air inside the junction box body 1 can be discharged from the air outlet 23 through the connecting pipe 25, so as to always keep the inside of the junction box body 1 ventilated, greatly reducing the temperature inside the junction box body 1 and effectively preventing the occurrence of phenomena such as overheating, overload, and short circuit in the junction box body 1.

[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A photovoltaic junction box, mounted on a junction box body (1), characterized in that: A wire insertion tube (8) is provided on one side of the outer surface of the junction box body (1), and a heat dissipation structure (2) is provided on the outer surface of the wire insertion tube (8); The heat dissipation structure (2) comprises a sleeve box (21) and a heat dissipation plate (26); partition plates (22) are arranged on both sides of the sleeve box (21); an air outlet (23) is provided on one side of the outer surface of the sleeve box (21); an exhaust fan (24) is provided on the other side of the outer surface of the sleeve box (21); the exhaust fan (24) is provided with a connection line connected to an external power supply; two connecting pipes (25) are arranged on one side of the outer surface of the sleeve box (21); one end of the two connecting pipes (25) is connected to a heat dissipation plate (26); the heat dissipation plate (26) is arranged inside the junction box body (1); a fixing plate (28) is installed inside the heat dissipation plate (26); a plurality of ventilation pipes (29) are installed on one side of the fixing plate (28); a plurality of heat dissipation ports (210) are provided on one side of the outer surface of the plurality of ventilation pipes (29); and a plurality of strip grooves (27) corresponding to the ventilation pipes (29) are provided at the bottom of the heat dissipation plate (26).

2. A photovoltaic junction box according to claim 1, characterized in that: One end of the wire insertion tube (8) is connected to a wire insertion port (4), a wiring post (3) is installed on the top of the extension of the junction box body (1), and the wiring post (3) is fixedly connected to the wire insertion port (4).

3. A photovoltaic junction box according to claim 1, characterized in that: A wiring assembly (7) is arranged inside the junction box body (1), and the wiring assembly (7) is arranged below the heat dissipation plate (26).

4. A photovoltaic junction box according to claim 1, characterized in that: A wiring port (5) is provided on one side of the outer surface of the junction box body (1); the wiring port (5) is fixedly connected to the wire insertion tube (8) and communicates with the wire insertion tube (8).

5. A photovoltaic junction box according to claim 3, characterized in that: Two through grooves (6) are provided on one side of the outer surface of the junction box body (1), and the two through grooves (6) are respectively fixedly connected to two connecting pipes (25).

6. A photovoltaic junction box according to claim 4, characterized in that: Both sides of the sleeve box (21) are in communication with the through groove (6), the sleeve box (21) and the connecting pipe (25).

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