Photovoltaic combiner box

Abstract

The present application discloses a photovoltaic combiner box, which relates to the technical field of combiner boxes. The technical points are: it includes a main installation back plate for installing electrical equipment and electrical components, the lower end of the main installation back plate is fixedly connected to one end of a horizontally arranged bottom plate, and the front side cover of the main installation back plate is provided with a protective cover; after the protective cover is covered on the main installation back plate, it can form a rectangular box structure with the main installation back plate and the bottom plate; the protective cover is hinged to the main installation back plate along one side in the horizontal direction, and the protective cover can be freely opened and closed in the horizontal direction around the axis of the hinge point with the main installation back plate. After the protective cover on the combiner box of the present application is opened, it can not only provide good lighting conditions for workers who need to install, inspect, maintain or wire components or electrical equipment in the photovoltaic combiner box, but also increase the workers' operating space, making it more convenient for workers to operate.

Description

Technical Field

[0001] The present application relates to the technical field of combiner boxes, and in particular to a photovoltaic combiner box. Background Art

[0002] PV combiner boxes are a crucial component of solar photovoltaic (PV) power generation systems. Their primary function is to centralize and distribute the power from multiple solar panels. Combiner boxes typically consist of several components: DC input terminals, fuses, disconnect switches, surge protectors, and residual current devices (RCDs). These components provide isolation, leakage protection, and grounding protection, ensuring the safe operation of the PV system. Combiner boxes can be categorized as either intelligent or non-intelligent, depending on the needs. Intelligent lightning protection combiner boxes incorporate a current monitoring unit that monitors the input current of each PV string, the aggregate output voltage, the temperature within the box, and the status of the lightning arrester and circuit breaker. PV combiner boxes play a crucial role in PV power generation systems, not only ensuring the efficient collection and distribution of power but also providing the necessary protection measures to ensure safe and stable system operation.

[0003] Since there are a large number of components and electrical equipment in the photovoltaic combiner box, many connecting wires are set between these components and electrical equipment in order to connect with each other. However, in general, only the front panel of the photovoltaic combiner box can be opened. When workers install, inspect, maintain and connect components or electrical equipment in the crowded photovoltaic combiner box, not only is the lighting effect poor, but the operation is also very inconvenient. Utility Model Content

[0004] The present application provides a photovoltaic combiner box, which not only increases the workers' operating space but also provides better lighting conditions for their work process when workers need to install, inspect, maintain or connect components or electrical equipment in the photovoltaic combiner box.

[0005] The above-mentioned purpose of this application is achieved through the following technical solutions:

[0006] A photovoltaic combiner box includes a main mounting back plate for mounting electrical equipment and electrical components, wherein the lower end of the main mounting back plate is fixedly connected to one end of a horizontally arranged bottom plate, and a front side cover of the main mounting back plate is provided with a protective cover;

[0007] After the protective cover is placed on the main mounting back plate, it can form a rectangular box structure with the main mounting back plate and the bottom plate. The rectangular box structure can protect the electrical equipment and electrical components on the main mounting back plate.

[0008] The protective cover is hinged to the main installation back plate at one side along the horizontal direction, and the protective cover can be freely opened and closed in the horizontal direction around the axis of the hinge point between the protective cover and the main installation back plate.

[0009] Furthermore, a Z-shaped mounting bracket is provided at each of the four corners of the back of the main mounting back plate, one end of the mounting bracket is welded to the back of the main mounting back plate, and a mounting hole is provided on the other end of the mounting bracket.

[0010] Furthermore, an extension plate extending toward the protective cover is provided at one end of the main installation back plate in the horizontal direction, and the protective cover is hinged to the extension plate on the main installation back plate through a hinge.

[0011] Furthermore, the ports for connecting the electrical equipment and electrical components on the main installation backplane with external equipment or lines are all arranged on the bottom plate.

[0012] Furthermore, a front panel that can be freely opened in a horizontal direction is provided on the area of ​​the protective cover that is opposite to the main installation back plate, and a door lock is provided on the front panel.

[0013] Furthermore, two mutually parallel limiting connecting plates are provided in the box body surrounded by the protective cover and the main mounting back plate, and bolt fastening holes are provided on the limiting connecting plates; the two limiting connecting plates are respectively installed on the main mounting back plate and the protective cover, and when the protective cover is buckled on the main mounting back plate, the axes of the bolt fastening holes on the two limiting connecting plates are exactly in a collinear state.

[0014] Furthermore, an inclined rainproof roof is fixedly installed on the top of the main installation back plate, and the lower end of the rainproof roof is located above the back of the main installation back plate.

[0015] Furthermore, the material of the rainproof roof is transparent plastic.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] The protective cover of the present application is hinged to the main installation back panel. When workers need to install, inspect, maintain and wire the electrical equipment or electrical components on the main installation back panel, they only need to open the protective cover horizontally along the hinge points of the remaining main installation back panels to expose all the electrical equipment and electrical components on the main installation back panel. Compared with the prior art, the electrical equipment and electrical components on the main installation back panel of the present application are less constrained by the surrounding frame, which not only provides a larger space for workers' operations, but also better lighting conditions during operation, so that workers can install, inspect, maintain and wire the electrical equipment and electrical components on the main installation back panel more conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of the protective cover of the present application when it is opened to 180° from the main mounting back plate;

[0020] Figure 2 It is a schematic diagram of the protective cover of the present application when it is in a closed state on the main mounting back plate;

[0021] Figure 3 is Figure 1 A schematic diagram of the overall structure when observed from the back of the main installation back plate based on the FIG.

[0022] Figure 4 This is a schematic diagram of the overall structure after only the front panel on the front side plate of the protective cover is opened.

[0023] Figure numerals: 1. Main mounting back panel; 2. Bottom panel; 3. Protective cover; 31. Left side panel; 32. Right side panel; 33. Front side panel; 34. Top panel; 4. Mounting bracket; 5. Extension panel; 6. Front panel; 7. Door lock; 8. Limit connecting plate; 9. Rainproof roof. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of this application.

[0025] like Figure 1 and Figure 2 As shown, a photovoltaic junction box disclosed in the present application includes a main mounting back plate 1 for mounting electrical equipment and electrical components, the lower end of the main mounting back plate 1 is fixedly connected to one end of a horizontally arranged base plate 2, and the front side cover of the main mounting back plate 1 is provided with a protective cover 3; after the protective cover 3 is covered on the main mounting back plate 1, it can form a rectangular box structure with the main mounting back plate 1 and the base plate 2, and the rectangular box structure can protect the electrical equipment and electrical components on the main mounting back plate 1; the protective cover 3 is hinged to the main mounting back plate 1 along one side in the horizontal direction, and the protective cover 3 can be freely opened and closed in the horizontal direction around the axis of the hinge point between it and the main mounting back plate 1.

[0026] In the above embodiments, the structure of the photovoltaic combiner box in the prior art is similar to that of an ordinary distribution box. When workers need to install, inspect, maintain and wire electrical equipment or components in the box, they usually open the movable door on the front and put their hands into the box. However, the space utilization rate inside the box is usually relatively high, and there are many electrical equipment and components. This will lead to limited operating space in the box, especially the frame around the box will limit the range of movement of the worker's arm, and during operation, the frame of the box will block the surrounding ambient light from entering, which will also cause poor lighting effects on site, making it inconvenient for workers to operate.

[0027] The main mounting back plate 1 of the present application is generally installed vertically on a wall or other flat surface, and the bottom plate 2 is arranged perpendicular to the main mounting back plate 1 and is located below the main mounting back plate 1. If the bottom plate 2 and the main mounting back plate 1 connected together are to form a rectangular box structure, it is also necessary to set a top plate 34 above the main mounting plate, add a left side plate 31 on its left side, add a right side plate 32 on its right side, and set a front side plate 33 on its front side. After the protective cover 3 of the present application is covered on the main mounting back plate 1, it can be used together with the main mounting back plate 1 and the bottom plate 2 to form a rectangular box that can protect the electrical equipment and components on the main mounting back plate 1. The structure formed by fixing the above-mentioned top plate 34, left side plate 31, right side plate 32 and front side plate 33 together is the shape of the protective cover 3 of the present application.

[0028] The protective cover 3 of the present application is hinged to the main installation back panel 1 along one side in the horizontal direction, so that workers can open or close the protective cover 3 from the main installation back panel 1 at any time as needed. For ease of understanding, taking the right side panel 32 as an example, the right side panel 32 is hinged to the main installation back panel 1 at one end away from the front side panel 33. When workers need to install, inspect, maintain and wire the electrical equipment or electrical components on the main installation back panel 1, they open the entire protective cover 3 to the right. At this time, the electrical equipment and electrical components on the main installation back panel 1 of the present application can be fully exposed. Compared with the junction box in the prior art, the electrical equipment and electrical components of the present application are obviously less obstructed by the two side frames and the top panel 34. In this way, workers can have more space to adjust the direction and angle of their arms. At the same time, natural light can also better shine on the electrical equipment and electrical components on the main installation back panel 1, so that workers can accurately and quickly complete the installation, inspection, maintenance and wiring operations.

[0029] Furthermore, if Figure 3 As shown, a Z-shaped mounting bracket 4 is provided at each of the four corners of the back of the main mounting back plate 1 , one end of the mounting bracket 4 is welded to the back of the main mounting back plate 1 , and a mounting hole is provided on the other end of the mounting bracket 4 .

[0030] In the above embodiment, the Z-shaped mounting bracket 4 of the present application consists of two parallel sections and a horizontal section. One of the parallel sections is welded to the back of the main mounting backplate 1, and the mounting holes are provided in the other parallel section. When the junction box of the present application needs to be installed on a wall, expansion bolts can be inserted into the mounting holes of each mounting bracket 4 and nailed into the wall to complete the installation of the junction box. There is a horizontal section between the two parallel sections of the mounting bracket 4, so there will be a certain gap between the junction box and the wall after installation. This gap can prevent the protective cover 3 from scratching the wall when the protective cover 3 is opened. At the same time, this gap can also increase the contact area between the junction box and the air, thereby enhancing the heat dissipation effect during its use.

[0031] Furthermore, if Figure 1 and Figure 2 As shown, an extension plate 5 extending toward the protective cover 3 is provided at one end of the main installation back plate 1 in the horizontal direction, and the protective cover 3 is hinged to the extension plate 5 on the main installation back plate 1 through a hinge.

[0032] In the above embodiment, the extension plate 5 added to one end of the main mounting back plate 1 can increase the distance between the hinged position of the protective cover 3 and the wall, and cooperate with the mounting bracket 4 to prevent the protective cover 3 from touching the wall during the opening process. Figure 2 As shown, the right side plate 32 of the protective cover 3 and the end of the extension plate 5 that are close to each other are hinged by hinges, and the width of the extension plate 5 plus the distance from the main mounting back plate 1 to the wall is not less than the width of the right side plate 32. In this way, when the worker opens the protective cover 3 to 180° around the hinge axis, the front side plate 33 of the protective cover 3 will not touch the wall. If the opening angle of the protective cover 3 is guaranteed by relying solely on the mounting bracket 4, it is easy to cause the horizontal section of the mounting bracket 4 to be too long, which will increase the space occupancy rate of the entire junction box when in use.

[0033] Furthermore, if Figure 2 and Figure 4 As shown, the ports for connecting the electrical equipment and electrical components on the main installation backplane 1 with external equipment or lines are all arranged on the bottom plate 2.

[0034] In the above embodiment, the connection ports between the electrical equipment and electrical components in the combiner box and the external equipment or lines are all arranged on the base plate 2, which can avoid disturbing these wires during the process of opening and closing the protective cover 3; and this arrangement is very convenient both in observation and operation during actual wiring.

[0035] Furthermore, if Figure 2 and Figure 4 As shown, a front panel 6 that can be freely opened in the horizontal direction is provided on the area of ​​the protective cover 3 facing the main installation back plate 1, and a door lock 7 is provided on the front panel 6.

[0036] In the above embodiment, if a worker only needs to perform a simple inspection of the electrical equipment and electrical components in the combiner box, or perform a switch opening and closing operation, it is not necessary to open the protective cover 3 as a whole. Instead, it is sufficient to open the front panel 6 of the protective cover 3 that is directly opposite the main mounting back plate 1. A door lock 7 is provided on the front panel 6 to prevent people other than the staff from damaging the equipment. The connection method between the front panel 6 and the protective cover 3 of the present application is similar to the connection method of the movable door on the existing combiner box, both of which are hinged. The hinged connection can be implemented by a hinge or a hinge.

[0037] Furthermore, if Figure 1 and Figure 4 As shown, two mutually parallel limiting connecting plates 8 are provided in the box body surrounded by the protective cover 3 and the main mounting back plate 1, and bolt fastening holes are provided on the limiting connecting plates 8; the two limiting connecting plates 8 are respectively installed on the main mounting back plate 1 and the protective cover 3. When the protective cover 3 is buckled on the main mounting back plate 1, the axes of the bolt fastening holes on the two limiting connecting plates 8 are exactly in a collinear state.

[0038] In the above embodiment, when the protective cover 3 of the present application is covered on the main installation back plate 1, the bolt fastening holes of their respective upper limit connecting plates 8 are just in an aligned state. At this time, the axes of the bolt fastening holes on the two limit connecting plates 8 are collinear. Workers pass a bolt through the two bolt fastening holes in turn, and then use nuts to limit and fix them. In this way, the protective cover 3 can be connected to the main installation back plate 1, and play a stable protective role for the electrical equipment and electrical components thereon.

[0039] In addition, the present application sets two limiting connecting plates 8 for fixing the protective cover 3 and the extension plate 5 on the inner side of the box surrounded by the protective cover 3, the main mounting back plate 1 (the main mounting back plate 1 and the extension plate 5 are an integrated structure, and the main mounting back plate 1 here actually includes the extension plate 5) and the bottom plate 2. In this way, if a worker wants to unfold the protective cover 3, he must first open the front panel 6 of the protective cover 3 before loosening the fastening bolts and nuts used to connect the two limiting connecting plates 8. A door lock 7 is provided on the front panel 6 of the protective cover 3, so ordinary people cannot unfold the protective cover 3 from the outside, thereby improving the safety of the present application.

[0040] Furthermore, if Figure 3 and Figure 4 As shown, an inclined rainproof roof 9 is fixedly installed on the top of the main installation back plate 1, and the lower end of the rainproof roof 9 is located above the back of the main installation back plate 1.

[0041] In the above embodiment, the rainproof ceiling 9 set in the above manner on the top of the main installation back plate 1 of the present application can guide rainwater when it rains, so that the rainwater flows down the wall from the back of the main installation back plate 1, so that when workers check the inside of the box on rainy days, they will not be disturbed by the rainwater discharged from the rainproof ceiling 9.

[0042] Furthermore, the material of the rainproof roof 9 is transparent plastic.

[0043] In the above embodiments, the rainproof roof 9 of the present application is made of transparent plastic. The rainproof roof 9 not only has a low production cost, but also has good light transmittance. When the protective cover 3 is opened, it can reduce the impact on the lighting of electrical components and electrical equipment on the main installation backplane 1.

[0044] The implementation principle of this embodiment is: when workers need to install, inspect, maintain and connect the electrical equipment and electrical components on the inner main installation backboard 1 of the junction box of this application, they first use a special key to open the front panel 6 on the protective cover 3, and then remove the bolts and nuts that connect the upper limit connecting plate 8 of the protective cover 3 and the upper limit connecting plate 8 of the extension plate 5, open the protective cover 3, and rotate it 180° around the hinge between the extension plate 5. At this time, the main installation backboard 1 and the electrical equipment and electrical components thereon are exposed, and the workers can carry out installation, inspection, maintenance or wiring operations on the electrical equipment or electrical components on the main installation backboard 1 as needed.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A photovoltaic combiner box, comprising a main mounting back plate (1) for mounting electrical equipment and electrical components, characterized in that: The lower end of the main installation back plate (1) is fixedly connected to one end of a horizontally arranged bottom plate (2), and a protective cover (3) is provided on the front side cover of the main installation back plate (1); After the protective cover (3) is covered on the main installation back plate (1), it can form a rectangular box structure with the main installation back plate (1) and the bottom plate (2), and the rectangular box structure can protect the electrical equipment and electrical components on the main installation back plate (1); The protective cover (3) is hinged to the main installation back plate (1) at one side along the horizontal direction, and the protective cover (3) can be freely opened and closed in the horizontal direction around the axis of the hinge point between the protective cover (3) and the main installation back plate (1).

2. The photovoltaic combiner box according to claim 1, characterized in that: A Z-shaped mounting bracket (4) is respectively provided at the four corners of the back of the main mounting back plate (1); one end of the mounting bracket (4) is welded to the back of the main mounting back plate (1); and a mounting hole is provided on the other end of the mounting bracket (4).

3. The photovoltaic combiner box according to claim 2, characterized in that: An extension plate (5) extending in the direction of the protective cover (3) is provided at one end of the main installation back plate (1) in the horizontal direction, and the protective cover (3) is hingedly connected to the extension plate (5) on the main installation back plate (1) via a hinge.

4. The photovoltaic combiner box according to claim 3, characterized in that: The ports for connecting the electrical equipment and electrical components on the main installation backplane (1) with external equipment or lines are all arranged on the bottom plate (2).

5. The photovoltaic combiner box according to claim 4, characterized in that: A front panel (6) that can be freely opened in a horizontal direction is provided on the protective cover (3) in an area directly facing the main installation back plate (1), and a door lock (7) is provided on the front panel (6).

6. The photovoltaic combiner box according to claim 5, characterized in that: Two mutually parallel limiting connecting plates (8) are arranged in a box body surrounded by the protective cover (3) and the main installation back plate (1), and bolt fastening holes are arranged on the limiting connecting plates (8); the two limiting connecting plates (8) are respectively mounted on the main installation back plate (1) and the protective cover (3), and when the protective cover (3) is buckled on the main installation back plate (1), the axes of the bolt fastening holes on the two limiting connecting plates (8) are exactly in a colinear state.

7. The photovoltaic combiner box according to any one of claims 1 to 6, characterized in that: An inclined rainproof ceiling (9) is fixedly mounted on the top of the main installation back plate (1), and the lower end of the rainproof ceiling (9) is located above the back of the main installation back plate (1).

8. The photovoltaic combiner box according to claim 7, characterized in that: The material of the rainproof roof (9) is transparent plastic.

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