A direct current combiner box

Abstract

The utility model relates to the technical field of confluence box, especially to a direct current confluence box, including box and the door of box rotation connection through hinged joint, still include having heat dissipation waterproof subassembly, the heat dissipation window is seted up on the door, the heat dissipation waterproof subassembly sets up in the position of corresponding heat dissipation window on the door inboard wall, and heat dissipation waterproof subassembly includes mounting frame and a plurality of pieces of heat dissipation fin, a plurality of pieces even interval and oblique setting inboard of mounting frame of heat dissipation fin, the one end of heat dissipation fin far from the door is higher than the one end close to the door, and the heat dissipation channel of communicating heat dissipation window is formed respectively between every two pieces of heat dissipation fin, the one end close to heat dissipation window of every piece of heat dissipation fin is bent with outer baffle along the direction of gravity, and the one end far from heat dissipation window is bent with inner baffle along the reverse of gravity, the utility model discloses in heat dissipation window inboard installation still can prevent water's heat dissipation fin, and the efficient heat dissipation and waterproof are considered simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of combiner box technology, and in particular to a DC combiner box. Background Technology

[0002] In a photovoltaic (PV) power generation system, the combiner box is a wiring device that ensures the orderly connection of PV modules and the function of current collection. This device allows for easy circuit disconnection during PV system maintenance and inspection, and minimizes the scope of power outages when a PV system malfunctions.

[0003] Patent CN213305347U discloses a photovoltaic DC combiner box, in which a reinforcing bent plate is welded at the side plate connection of the box body. This solution has the advantage of small welding deformation. However, further investigation revealed that this solution still has the following problems: the combiner box needs to meet the requirements of long-term outdoor use, and the electronic components installed inside will generate a lot of heat when working. Therefore, the combiner box body must have both good waterproof and heat dissipation effects. The existing technology only has heat dissipation holes on the box body, which cannot achieve waterproofing and cannot simultaneously meet the above two advantages. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a DC combiner box. This invention has a waterproof heat sink installed inside the heat dissipation window, which simultaneously achieves efficient heat dissipation and waterproofing.

[0005] The technical solution adopted by this utility model is as follows: A DC combiner box includes a box body and a door rotatably connected to the box body via a hinge, and also includes a heat dissipation and waterproofing component. The door has a heat dissipation window, and the heat dissipation and waterproofing component is disposed on the inner side wall of the door corresponding to the heat dissipation window. The heat dissipation and waterproofing component includes a mounting frame and several heat dissipation fins. The several heat dissipation fins are evenly spaced and inclinedly disposed inside the mounting frame. The end of the heat dissipation fin away from the door is higher than the end near the door. A heat dissipation channel connecting the heat dissipation window is formed between every two heat dissipation fins. Each heat dissipation fin has an outer baffle bent along the direction of gravity at the end near the heat dissipation window and an inner baffle bent along the opposite direction of gravity at the end away from the heat dissipation window.

[0006] The outer baffle is bent toward the interior of the heat dissipation channel and has a relatively vertical first baffle plate. The inner baffle is also bent toward the interior of the heat dissipation channel and has a relatively vertical second baffle plate. The second baffle plate is parallel to the first baffle plate and is higher than the first baffle plate.

[0007] The heat dissipation and waterproofing assembly also includes a dustproof frame and a dustproof mesh disposed inside the dustproof frame. The dustproof mesh is thinner than the dustproof frame, and the dustproof frame is disposed on the side of the mounting frame away from the cabinet door.

[0008] Each of the outer baffles has a first plug-in plate extending from both ends to engage with the mounting frame. The first plug-in plate is also sandwiched between the mounting frame and the door. Each of the inner baffles has a second plug-in plate extending from both ends to engage with the mounting frame. The second plug-in plate is also sandwiched between the mounting frame and the dustproof frame.

[0009] The heat dissipation and waterproofing assembly also includes a guide plate that is inclinedly disposed inside the mounting frame. One end of the guide plate that abuts against the door is flush with the lower edge of the heat dissipation window, and the other end extends to the side of the dustproof net away from the mounting frame.

[0010] A vertical flow guide gap is formed between the dustproof net and the inner baffle, and an oblique flow guide gap is formed between the dustproof net and the flow guide plate.

[0011] The end of the guide plate is bent to have a connecting plate that passes through the heat dissipation window. The side wall of the connecting plate is attached to the end face of the door away from the mounting frame. Both sides of the guide plate are bent to have side plates that are attached to the inner side wall of the mounting frame. The connecting plate, the door and the mounting frame are connected by fasteners.

[0012] The beneficial effects of this utility model are as follows: The heat sinks are evenly spaced and inclined, so that the end of the heat sink away from the door is higher than the end near the door. The heat dissipation channel formed gradually decreases from the inside to the outside, which not only does not hinder the smooth discharge of hot air through the heat dissipation window, but also prevents liquid from flowing into the box. Liquid in contact with the heat sinks will flow out towards the outside of the door along the inclined direction of the heat sinks. At the same time, the end of each heat sink near the heat dissipation window is bent downward to form an outer baffle, and the other end is bent upward to form an inner baffle. The outer baffle can effectively block external splash water entering from the heat dissipation window. The inner baffle and the inclined heat sinks further form a labyrinth-like water blocking path to prevent water from entering the box. Thus, reliable waterproofing is achieved while ensuring good ventilation and heat dissipation. This solves the problem that it is difficult for the manifold to simultaneously achieve efficient heat dissipation and waterproofing, and significantly improves the reliability and service life of the equipment during long-term outdoor operation. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the middle box door of this utility model; Figure 3 This is a structural schematic diagram of the cabinet door from another perspective of this utility model; Figure 4 This is a cross-sectional view of the cabinet door of this utility model; Figure 5 for Figure 4 A magnified view of a portion of point A in the middle; Figure 6 This is a partially enlarged schematic diagram of the heat sink in this utility model; In the diagram, 1-box body, 2-hinge, 3-box door, 4-heat dissipation window, 5-mounting frame, 6-heat sink, 7-heat dissipation channel, 8-outer baffle, 9-inner baffle, 10-first baffle, 11-second baffle, 12-dustproof frame, 13-dustproof net, 14-first connector plate, 15-second connector plate, 16-guide plate, 17-vertical guide gap, 18-diagonal guide gap, 19-connecting plate, 20-side plate. Detailed Implementation

[0015] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0016] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0017] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0018] like Figures 1 to 6As shown, this is an embodiment of the present invention. A DC combiner box includes a box body 1 and a door 3 rotatably connected to the box body 1 via a hinge 2. It also includes a heat dissipation and waterproofing assembly. The door 3 has a heat dissipation window 4. The heat dissipation and waterproofing assembly is disposed on the inner side wall of the door 3 corresponding to the heat dissipation window 4. The heat dissipation and waterproofing assembly includes a mounting frame 5 and several heat dissipation fins 6. The several heat dissipation fins 6 are evenly spaced and inclinedly disposed inside the mounting frame 5. The end of the heat dissipation fins 6 away from the door 3 is higher than the end near the door 3. A heat dissipation channel 7 is formed between every two heat dissipation fins 6, which connects to the heat dissipation window 4. Each heat dissipation fin 6 has an outer baffle 8 bent along the direction of gravity at the end near the heat dissipation window 4, and an inner baffle 9 bent along the opposite direction of gravity at the end away from the heat dissipation window 4.

[0019] The beneficial effects of this design are as follows: the heat sinks are evenly spaced and angled, with the end furthest from the door higher than the end closest to the door. The resulting heat dissipation channel gradually decreases from the inside to the outside, which not only does not obstruct the smooth flow of hot air through the heat dissipation window but also prevents liquid from flowing into the cabinet. Liquid in contact with the heat sinks will flow outwards along the angle of the heat sinks towards the outside of the door. At the same time, the end of each heat sink near the heat dissipation window is bent downwards to form an outer baffle, and the other end is bent upwards to form an inner baffle. The outer baffle can effectively block external splashes of water entering through the heat dissipation window, and the inner baffle and the angled heat sinks further form a labyrinthine water-blocking path, preventing water from entering the cabinet. Thus, reliable waterproofing is achieved while ensuring good ventilation and heat dissipation. This solves the problem that it is difficult for a manifold to simultaneously achieve efficient heat dissipation and waterproofing, significantly improving the reliability and service life of the equipment during long-term outdoor operation.

[0020] Further, the outer baffle 8 is bent toward the interior of the heat dissipation channel 7 with a relatively vertical first baffle 10, and the inner baffle 9 is also bent toward the interior of the heat dissipation channel 7 with a relatively vertical second baffle 11. The second baffle 11 is relatively parallel to the first baffle 10, and the second baffle 11 is higher than the first baffle 10.

[0021] The beneficial effects of this design are as follows: by bending the outer and inner baffles into the heat dissipation channel to form a first and second water baffle that are relatively parallel and at different heights, with the inner second water baffle being higher than the outer first water baffle, a tortuous stepped water-blocking path is further constructed on the basis of the original water-blocking structure. Even if external splash water crosses the outer baffle under extreme working conditions, it will be effectively intercepted by the second water baffle. Furthermore, because the inner water baffle is higher, water cannot climb into the cabinet under the action of gravity. Thus, while maintaining the unobstructed heat dissipation channel and not affecting the exhaust of hot air, the waterproof reliability and adaptability to harsh environments are greatly improved.

[0022] Furthermore, the heat dissipation and waterproofing assembly also includes a dustproof frame 12 and a dustproof net 13 disposed inside the dustproof frame 12. The dustproof net 13 is thinner than the dustproof frame 12. The dustproof frame 12 is disposed on the side of the mounting frame 5 away from the door 3.

[0023] The beneficial effects of this design are as follows: By adding a dustproof frame and dustproof net, and placing the entire dustproof frame on the side of the mounting frame away from the cabinet door, a dustproof barrier is formed inside the heat dissipation and waterproof components. This effectively prevents external dust, catkins, and other foreign objects from entering the cabinet, avoiding dust accumulation that could affect the heat dissipation and insulation performance of electronic components. At the same time, the dustproof net is thinner than the dustproof frame, resulting in minimal ventilation resistance to the heat dissipation channel, ensuring that the heat dissipation airflow can still be smoothly discharged. The dustproof frame provides solid support and protection for the dustproof net, thereby further improving the long-term operational reliability of the junction box in complex outdoor environments with high dust and catkin content without weakening the original efficient heat dissipation and reliable waterproof performance.

[0024] Furthermore, each of the outer baffles 8 has a first plug-in plate 14 extending from both ends to engage with the mounting frame 5. The first plug-in plate 14 is also sandwiched between the mounting frame 5 and the door 3. Each of the inner baffles 9 has a second plug-in plate 15 extending from both ends to engage with the mounting frame 5. The second plug-in plate 15 is also sandwiched between the mounting frame 5 and the dustproof frame 12.

[0025] The beneficial effects of this design are as follows: by extending the first plug-in plate from both ends of the outer baffle and plugging it in between the mounting frame and the door, and by extending the second plug-in plate from both ends of the inner baffle and plugging it in between the mounting frame and the dustproof frame, multiple plug-in connections and clamping fixation are achieved between the heat sink, the mounting frame, the dustproof frame, and the door. During assembly, positioning can be completed simply by stacking them sequentially, without the need for additional fasteners, greatly simplifying the assembly process. At the same time, the plug-in plates are clamped and pressed between each layer of components, so that both ends of the heat sink are stably supported, effectively preventing the heat sink from loosening or deforming due to long-term use or external impact, ensuring the stability of the heat dissipation channel spacing and the integrity of the water blocking path, thereby further improving structural reliability and assembly efficiency while maintaining the original high-efficiency heat dissipation, reliable waterproofing, and dustproofing effects.

[0026] Furthermore, the heat dissipation and waterproofing assembly also includes a guide plate 16 that is inclinedly disposed inside the mounting frame 5. One end of the guide plate 16 that abuts against the door 3 is flush with the lower edge of the heat dissipation window 4, and the other end extends to the side of the dustproof net 13 away from the mounting frame 5.

[0027] The beneficial effects of this design are as follows: under severe conditions such as extreme rainstorms, if a small amount of splashed water crosses the water-blocking structure and enters the inner side of the heat dissipation channel, this water can flow down along the inclined surface of the guide plate and be guided to the outer area of ​​the heat dissipation window. This provides active drainage protection for the internal components without affecting the original heat dissipation efficiency, waterproof and dustproof effect, and structural stability, thereby improving the protection redundancy and operational reliability of the manifold under extreme weather conditions.

[0028] Furthermore, a vertical flow guide gap 17 is formed between the dustproof net 13 and the inner baffle 9, and an oblique flow guide gap 18 is formed between the dustproof net 13 and the flow guide plate 16.

[0029] The beneficial effects of this design are as follows: a small amount of water entering the inner side of the enclosure through the inner baffle is quickly discharged to the guide plate under the action of gravity along the vertical guide gap; or water droplets attached to the dust screen can also drip onto the guide plate along the vertical guide gap. At the same time, water flowing along the guide plate is directed to the outside of the heat dissipation window along the oblique guide gap. The two work together to form a complete directional drainage path, providing a path for the dust screen to drain water, further improving the internal waterproofing and drainage coordination capability and the reliability of extreme weather protection.

[0030] Further, the end of the guide plate 16 is bent to have a connecting plate 19 that passes through the heat dissipation window 4. The side wall of the connecting plate 19 is attached to the end face of the door 3 away from the mounting frame 5. Both side walls of the guide plate 16 are bent to have side plates 20 that are attached to the inner side wall of the mounting frame 5. The connecting plate 19, the door 3 and the mounting frame 5 are connected by fasteners.

[0031] The beneficial effects of this design are as follows: the connecting plate extends to the outside of the heat dissipation window, allowing water to be directly discharged to the outside of the cabinet door, preventing water from flowing back into the cabinet through the gap between the cabinet door and the guide plate. The side plate prevents water from flowing back into the cabinet through the gap between the side wall of the guide plate and the inner side wall of the mounting frame. At the same time, the guide plate is also positioned and fixed by the connecting plate and the side plate, improving the overall structural strength and assembly reliability. The fasteners use screws, which can directly connect and fix the connecting plate, cabinet door, and mounting frame together. This optimizes the number of fasteners while ensuring a firm installation. The dustproof frame and the mounting frame can also be connected and fixed by screws.

[0032] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A DC combiner box, comprising a box body (1) and a door (3) rotatably connected to the box body (1) via a hinge (2), characterized in that: It also includes a heat dissipation and waterproofing component. The door (3) is provided with a heat dissipation window (4). The heat dissipation and waterproofing component is set on the inner wall of the door (3) at the position corresponding to the heat dissipation window (4). The heat dissipation and waterproofing component includes an installation frame (5) and several heat dissipation fins (6). The several heat dissipation fins (6) are evenly spaced and inclinedly arranged inside the installation frame (5). The end of the heat dissipation fin (6) away from the door (3) is higher than the end close to the door (3). A heat dissipation channel (7) connecting the heat dissipation window (4) is formed between every two heat dissipation fins (6). Each heat dissipation fin (6) has an outer baffle (8) bent along the direction of gravity at the end close to the heat dissipation window (4) and an inner baffle (9) bent along the opposite direction of gravity at the end away from the heat dissipation window (4).

2. A DC combiner box according to claim 1, characterized in that: The outer baffle (8) is bent toward the heat dissipation channel (7) with a relatively vertical first baffle (10), and the inner baffle (9) is also bent toward the heat dissipation channel (7) with a relatively vertical second baffle (11). The second baffle (11) is relatively parallel to the first baffle (10), and the second baffle (11) is higher than the first baffle (10).

3. A DC combiner box according to claim 1, characterized in that: The heat dissipation and waterproofing assembly also includes a dustproof frame (12) and a dustproof net (13) disposed inside the dustproof frame (12). The dustproof net (13) is thinner than the dustproof frame (12). The dustproof frame (12) is disposed on the side of the mounting frame (5) away from the door (3).

4. A DC combiner box according to claim 3, characterized in that: Each of the outer baffles (8) has a first plug-in plate (14) extending from both ends to engage with the mounting frame (5). The first plug-in plate (14) is also sandwiched between the mounting frame (5) and the door (3). Each of the inner baffles (9) has a second plug-in plate (15) extending from both ends to engage with the mounting frame (5). The second plug-in plate (15) is also sandwiched between the mounting frame (5) and the dustproof frame (12).

5. A DC combiner box according to claim 3, characterized in that: The heat dissipation and waterproofing assembly also includes a guide plate (16) that is inclinedly disposed inside the mounting frame (5). One end of the guide plate (16) that abuts against the door (3) is flush with the lower edge of the heat dissipation window (4), and the other end extends to the side of the dustproof net (13) away from the mounting frame (5).

6. A DC combiner box according to claim 5, characterized in that: A vertical flow guide gap (17) is formed between the dustproof net (13) and the inner baffle (9), and an oblique flow guide gap (18) is formed between the dustproof net (13) and the flow guide plate (16).

7. A DC combiner box according to claim 5, characterized in that: The end of the guide plate (16) is bent to have a connecting plate (19) that passes through the heat dissipation window (4). The side wall of the connecting plate (19) is attached to the end face of the door (3) away from the mounting frame (5). Both sides of the guide plate (16) are bent to have side plates (20) that are attached to the inner side wall of the mounting frame (5). The connecting plate (19), the door (3) and the mounting frame (5) are connected by fasteners.

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