Photovoltaic module junction box capable of improving heat dissipation efficiency

Abstract

The utility model discloses a photovoltaic module junction box capable of improving heat dissipation efficiency, and belongs to the field of solar photovoltaic technology. Comprising a junction box body, a box cover hinged to the junction box body, a wire clamp installed on the inner side of the junction box body and terminal studs symmetrically installed on the outer side wall of the junction box body, and an installation piece is fixedly connected between the wire clamp and the bottom wall of an inner cavity of the junction box body. A heat dissipation shell is detachably connected to the lower surface of the mounting piece, the two ends of the heat dissipation shell are of a conduction type structure, counter bores are symmetrically formed in the bottom of the heat dissipation shell, and the heat exchange area can be well increased through the heat dissipation pieces which are located on the inner side of the heat dissipation shell and are of a continuous S-shaped structure; heat dissipation is accelerated through the air ducts arranged between the cooling fins, flowing of air on the inner side of the junction box body can be accelerated through the cooling holes, and therefore the cooling efficiency of the junction box body can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solar photovoltaics, and more specifically to a photovoltaic component junction box capable of improving heat dissipation efficiency. Background Art

[0002] The photovoltaic junction box is a connection device between the solar cell array composed of solar cell modules and the solar charging control device. Its main function is to connect and protect solar photovoltaic modules, connect the power generated by solar cells to external lines, and conduct the current generated by photovoltaic modules.

[0003] An existing patent discloses a photovoltaic module junction box, and the patent authorization number CN210927558U includes a junction box shell and a device assembly strip; the device assembly strip includes a plurality of assembly modules, each assembly module is fixed in a card slot on the surface of the junction box shell; the assembly module includes a spacer plate docked with the card slot and an assembly board for assembling the device, and a sealing groove is formed between the spacer plate and the assembly board; the spacer plate is buckled on the card slot of the junction box shell, and the spacer plate is provided with through holes for wiring and gluing; the assembly board assembles electronic devices on the outside of the sealing groove, and the assembly board is provided with assembly holes for assembling the electronic devices, and the assembly board is also provided with glue filling holes, which solves the problem of reduced heat dissipation performance of the devices inside the junction box.

[0004] However, in patent authorization number CN210927558U, the assembly board assembles electronic devices on the outside of the sealing groove, and assembly holes for assembling electronic devices are provided on the assembly board. The pins of the electronic devices extend into the sealing groove through the assembly holes, and the pins extend into the sealing groove by at least 2 mm. The assembly board is also provided with glue filling holes, and the glue filling holes are used to fill glue into the sealing groove when the electrical devices are subsequently replaced. In this way, the electronic devices are arranged in the space outside the sealing groove, avoiding the reduction of the heat dissipation performance of the electronic devices due to the sealing glue. Due to the lack of effective heat dissipation structure on the junction box shell, the heat dissipation efficiency of the electronic devices installed therein is low. Therefore, we propose a photovoltaic module junction box with improved heat dissipation efficiency to solve the above-mentioned problems. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a photovoltaic module junction box with improved heat dissipation efficiency, which can greatly improve the heat exchange area through the heat sinks arranged in a continuous S-shaped structure on the inner side of the heat dissipation shell, and accelerate the dissipation of heat by utilizing the air ducts arranged between the heat sinks, and accelerate the flow of air inside the junction box body through the heat dissipation hole shell, thereby effectively improving the heat dissipation efficiency of the junction box body.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] A photovoltaic module junction box for improving heat dissipation efficiency, comprising a junction box body, a box cover hingedly connected to the junction box body, a wire clamp installed inside the junction box body, and wiring terminals symmetrically installed on the outer side wall of the junction box body. A mounting plate is fixedly connected between the wire clamp and the inner cavity bottom wall of the junction box body;

[0008] The lower surface of the mounting plate is detachably connected with a heat dissipation shell, and both ends of the heat dissipation shell are arranged in a conductive structure. The bottom of the heat dissipation shell is symmetrically provided with countersunk holes, and the countersunk holes penetrate through the heat dissipation shell. A heat dissipation fin is fixedly connected inside the heat dissipation shell, and a plurality of heat dissipation fins are arranged at equal intervals. The lengths of the plurality of heat dissipation fins are all adapted to the length of the heat dissipation shell, and the heat dissipation fins are arranged in a continuous S-shaped structure. An air duct is arranged between two adjacent heat dissipation fins;

[0009] Heat dissipation holes are formed in both outer side walls of the junction box body near the wiring terminals, and a plurality of heat dissipation holes are arranged at equal intervals.

[0010] Furthermore, outer frames are installed at both ends of the heat dissipation shell, and dust-proof nets are installed inside the outer frames and are abutted against the ports of the heat dissipation shell.

[0011] Furthermore, the wire clamp is fixedly connected with the mounting plate by screws, and both the mounting plate and the wire clamp are made of stainless steel.

[0012] Furthermore, assembly holes are formed at both ends of the mounting plate, and screw holes are formed at positions corresponding to the assembly holes on the bottom of the junction box body.

[0013] Furthermore, heat-conducting silicone grease is coated between the parts where the mounting plate and the heat dissipation shell are combined.

[0014] Furthermore, both the heat dissipation shell and the heat dissipation fins are made of copper-aluminum alloy.

[0015] Furthermore, screw holes are formed at positions corresponding to the countersunk holes on the lower surface of the mounting plate.

[0016] Compared with the prior art, the advantages of the present utility model are as follows:

[0017] (1) In this solution, during operation, heat transfer occurs at the part where the wire is connected to the wire clamp. Thus, the heat is transferred to the heat dissipation shell located outside the junction box body through the mounting plate. The heat dissipation fins arranged in a continuous S-shaped structure inside the heat dissipation shell can effectively increase the heat exchange area. The air duct arranged between the heat dissipation fins accelerates the dissipation of heat, and the heat dissipation holes can accelerate the air flow inside the junction box body, thereby effectively improving the heat dissipation efficiency of the junction box body.

[0018] (2) In this solution, the dust-proof net installed inside the outer frame can effectively prevent dust from entering the inside through the ports of the heat dissipation shell and adhering to the heat sink. By regularly cleaning the dust on the dust-proof net, the heat dissipation effect of the heat dissipation shell in cooperation with the heat sink on the junction box body can be ensured. Description of the Drawings

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 It is a structural schematic diagram of the mounting piece of the present utility model;

[0021] Figure 3 It is a structural schematic diagram of the heat dissipation shell of the present utility model;

[0022] Figure 4 It is a structural schematic diagram of the dust-proof net of the present utility model;

[0023] Figure 5 It is a structural schematic diagram of the heat sink of the present utility model.

[0024] Explanation of the reference numerals in the figure:

[0025] Junction box body; 2. Box cover; 3. Wire clip; 4. Mounting piece; 5. Assembly hole; 6. Heat dissipation shell; 7. Countersunk head hole; 8. Heat sink; 9. Heat dissipation hole; 10. Outer frame; 11. Dust-proof net; 12. Wiring end. Specific Embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described 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 the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model. Embodiment

[0027] Please refer to Figures 1-5 , a photovoltaic module junction box for improving heat dissipation efficiency, comprising a junction box body 1, a box cover 2 hinged to the junction box body 1, a wire clip 3 installed inside the junction box body 1, and wiring ends 12 symmetrically installed on the outer side wall of the junction box body 1. A mounting piece 4 is fixedly connected between the wire clip 3 and the inner cavity bottom wall of the junction box body 1;

[0028] The lower surface of the mounting plate 4 is detachably connected to a heat dissipation shell 6, and both ends of the heat dissipation shell 6 are arranged in a conductive structure. The bottom of the heat dissipation shell 6 is symmetrically provided with countersunk holes 7, and the countersunk holes 7 penetrate through the heat dissipation shell 6. A heat dissipation fin 8 is fixedly connected to the inner side of the heat dissipation shell 6, and a plurality of heat dissipation fins 8 are arranged at equal intervals. The lengths of the plurality of heat dissipation fins 8 are all adapted to the length of the heat dissipation shell 6, and the heat dissipation fins 8 are arranged in a continuous S-shaped structure. An air duct is arranged between two adjacent heat dissipation fins 8;

[0029] Heat dissipation holes 9 are provided on both outer walls of the junction box body 1 near the wiring terminals 12, and a plurality of heat dissipation holes 9 are arranged at equal intervals;

[0030] It should be noted that first, the mounting plate 4 is installed at the bottom of the inner cavity of the junction box body 1, then the wire clamp 3 is installed on the upper surface of the mounting plate 4, and the wire clamp 3 is used to cooperate with the wiring terminal 12 for wiring. The part of the wire that is connected to the wire clamp 3 during operation will generate heat transfer, so that the heat is transferred to the heat dissipation shell 6 located outside the junction box body 1 through the mounting plate 4. The heat dissipation fins 8 arranged in a continuous S-shaped structure on the inner side of the heat dissipation shell 6 can well increase the heat exchange area, and the air duct arranged between the heat dissipation fins 8 is used to accelerate the dissipation of heat, and the heat dissipation holes 9 can accelerate the flow of air inside the junction box body 1, thereby effectively improving the heat dissipation efficiency of the junction box body 1.

[0031] As Figure 4 、 Figure 5 As shown, outer frames 10 are installed at both ends of the heat dissipation shell 6, and dust-proof nets 11 that are in contact with the ports of the heat dissipation shell 6 are installed inside the outer frames 10. Both the heat dissipation shell 6 and the heat dissipation fins 8 are made of copper-aluminum alloy;

[0032] It should be noted that the dust-proof net 11 installed inside the outer frame 10 can effectively prevent dust from entering the inside of the heat dissipation shell 6 through its ports and adhering to the heat dissipation fins 8. By regularly cleaning the dust on the dust-proof net 11, the heat dissipation effect of the heat dissipation shell 6 cooperating with the heat dissipation fins 8 on the junction box body 1 can be ensured.

[0033] As Figure 1 As shown, the wire clamp 3 is fixedly connected to the mounting plate 4 by screws, and both the mounting plate 4 and the wire clamp 3 are made of stainless steel. Assembly holes 5 are provided at both ends of the mounting plate 4, and screw holes are provided at the corresponding parts of the bottom of the junction box body 1 and the assembly holes 5;

[0034] It should be noted that it is convenient for the assembly between the mounting plate 4 and the junction box body 1 and the assembly between the mounting plate 4 and the wire clamp 3.

[0035] As Figure 1 、 Figure 3 As shown, a thermal conductive silicone grease is coated between the parts where the mounting plate 4 and the heat dissipation shell 6 are combined;

[0036] It should be noted that applying heat-conducting silicone grease is conducive to transferring the heat on the mounting piece 4 to the heat dissipation housing 6.

[0037] As Figure 3 , Figure 4 shown, screw holes are provided at the positions of the lower surface of the mounting piece 4 corresponding to the counterbore holes 7;

[0038] It should be noted that it is convenient to assemble the heat dissipation housing 6 on the lower surface part of the mounting piece 4.

[0039] In use: First, the mounting piece 4 is installed at the bottom of the inner cavity of the junction box body 1, then the wire clamp 3 is installed on the upper surface of the mounting piece 4, and the wire clamp 3 is used to cooperate with the connection terminal 12 for wiring. When the wire is working, heat transfer will occur at the part connected to the wire clamp 3. Thus, the heat is transferred to the heat dissipation housing 6 located outside the junction box body 1 through the mounting piece 4. The heat dissipation fins 8 arranged in a continuous S-shaped structure inside the heat dissipation housing 6 can well increase the heat exchange area, and the air ducts arranged between the heat dissipation fins 8 are used to accelerate the dissipation of heat.

[0040] The above is only the preferred specific implementation manner of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A photovoltaic module junction box for improving heat dissipation efficiency, comprising a junction box body (1), a box cover (2) hinged to the junction box body (1), a wire clip (3) installed inside the junction box body (1), and wiring terminals (12) symmetrically installed on the outer side wall of the junction box body (1), characterized in that: A mounting piece (4) is fixedly connected between the wire clamp (3) and the inner cavity bottom wall of the junction box body (1); The lower surface of the mounting piece (4) is detachably connected with a heat dissipation shell (6), and both ends of the heat dissipation shell (6) are arranged in a conduction structure. Counterbore holes (7) are symmetrically formed at the bottom of the heat dissipation shell (6), and the counterbore holes (7) penetrate through the heat dissipation shell (6). A heat dissipation fin (8) is fixedly connected to the inner side of the heat dissipation shell (6), and a plurality of the heat dissipation fins (8) are arranged at equal intervals. The lengths of the plurality of heat dissipation fins (8) are all adapted to the length of the heat dissipation shell (6), and the heat dissipation fins (8) are arranged in a continuous S-shaped structure. An air duct is arranged between two adjacent heat dissipation fins (8); Heat dissipation holes (9) are formed in both outer walls of the junction box body (1) close to the wiring end (12), and a plurality of the heat dissipation holes (9) are arranged at equal intervals.

2. The photovoltaic module terminal box for improving heat dissipation efficiency according to claim 1, wherein: Outer frames (10) are installed at both ends of the heat dissipation shell (6), and dust-proof nets (11) which are abutted against the ports of the heat dissipation shell (6) are installed inside the outer frames (10).

3. A photovoltaic module junction box for improving heat dissipation efficiency according to claim 1, characterized in that: The wire clamp (3) is fixedly connected with the mounting piece (4) by screws, and both the mounting piece (4) and the wire clamp (3) are made of stainless steel.

4. A photovoltaic module junction box for improving heat dissipation efficiency according to claim 1, characterized in that: Assembly holes (5) are formed at both ends of the mounting piece (4), and screw holes are formed at positions corresponding to the assembly holes (5) at the bottom of the junction box body (1).

5. The photovoltaic module junction box for improving heat dissipation efficiency according to claim 1, wherein: Thermal grease is coated between the parts where the mounting piece (4) and the heat dissipation shell (6) are combined.

6. The photovoltaic module junction box for improving heat dissipation efficiency according to claim 1, wherein: Both the heat dissipation shell (6) and the heat dissipation fins (8) are made of copper-aluminum alloy.

7. The photovoltaic module junction box for improving heat dissipation efficiency according to claim 1, wherein: Screw holes are formed at positions corresponding to the counterbore holes (7) on the lower surface of the mounting piece (4).

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