Miniature inverter junction box

Abstract

The utility model discloses a miniature inverter junction box, which comprises a shell, a metal track, a plurality of binding posts, a plurality of insulating partition plates and a grounding bar, and is characterized in that the metal track is positioned in the shell and fixedly mounted at the bottom of the shell; the plurality of binding posts are fixedly mounted on the metal track; the insulating partition plates are respectively positioned between two adjacent binding posts; the grounding bar is arranged at the bottom of the shell and is independent of the metal rail. Through the arrangement, the safety and the assembly convenience of the micro inverter junction box can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of inverters, and in particular to a micro inverter junction box. Background Art

[0002] The micro inverter junction box is a connection device between the solar photovoltaic module and the micro inverter. Its main function is to connect and protect the solar photovoltaic module, connect the power generated by the solar cell to the micro inverter, and conduct the power generated by the photovoltaic module. The micro inverter junction box currently used has a relatively complex structure, which is not only inconvenient to connect and install, but also has safety risks.

[0003] Therefore, it is extremely important to design a micro-inverter junction box that is easy to install and safe. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the purpose of the present application is to provide a micro inverter junction box that is safer and easier to assemble.

[0005] To achieve the above objectives, this application adopts the following technical solutions:

[0006] A micro inverter junction box comprises a shell, a metal track, a plurality of terminal posts, a plurality of insulating partitions and a grounding bar, wherein the metal track is located inside the shell and fixedly mounted on the bottom of the shell; the plurality of terminal posts are all fixedly mounted on the metal track; the insulating partitions are respectively located between two adjacent terminal posts; and the grounding bar is arranged at the bottom of the shell and is independent of the metal track.

[0007] Furthermore, the metal track is in a concave shape, and the metal track includes a bottom plate and two extension parts, and the two extension parts are respectively fixedly connected to two sides of the bottom plate or formed in one piece.

[0008] Furthermore, a mounting hole for the first fastener to pass through is opened on the bottom plate of the metal track, and the first fastener passes through the mounting hole and fixes the metal track to the bottom of the shell.

[0009] Furthermore, a mounting portion is provided at the edge of the terminal post, and the mounting portion is connected to at least one extended portion of the metal track through a second fastener.

[0010] Furthermore, a connection gap is provided between two adjacent binding posts, and the insulating partition is inserted into the connection gap.

[0011] Furthermore, the shell is also provided with a wire outlet hole and a plurality of wire inlet holes, and the wire outlet hole and the plurality of wire inlet holes are both located at the lower part of the shell.

[0012] Furthermore, the micro inverter junction box also includes a plurality of sealing rings, which are respectively snapped into the outlet holes and the plurality of inlet holes.

[0013] Furthermore, a clamping portion for mounting the micro inverter junction box to an external device is also provided on the housing, and the clamping portion is located outside the housing.

[0014] Furthermore, the clamping portion includes at least one fixed buckle, which is provided with a first slot body and a second slot body which are interconnected, the first slot body basically extends in a horizontal direction, and the first slot body has an opening located at the edge of the fixed buckle, and the second slot body basically extends in a vertical direction.

[0015] Furthermore, four binding posts are fixedly installed on the metal track, and the four binding posts are respectively an A-phase binding post, a B-phase binding post, a C-phase binding post and an N-phase binding post.

[0016] The micro inverter junction box can improve the safety of the micro inverter junction box by providing an insulating partition between two adjacent binding posts, and can enable multiple binding posts to be installed with the housing through only one metal track, thereby improving the installation convenience of multiple binding posts. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a micro-inverter junction box provided in an embodiment of the present application.

[0018] Figure 2 A schematic diagram of a portion of the structure of a micro-inverter junction box provided in an embodiment of the present application.

[0019] Figure 3 An exploded view of a portion of the structure of a micro-inverter junction box provided in an embodiment of the present application.

[0020] Figure 4 A partial structural assembly diagram of a micro inverter junction box provided in an embodiment of the present application.

[0021] Figure 5 A schematic diagram of the structure of a micro-inverter junction box and external devices provided in an embodiment of the present application.

[0022] Figure 6 For the embodiment of this application Figure 5 A partial enlarged view of point A in the middle. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the specific implementation manner of the present application will be clearly and completely described below in conjunction with the drawings in the implementation manner of the present application.

[0024] It should be noted that the words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantitative limitation, but indicate the existence of at least one. "Multiple" or "several" means at least two. Unless otherwise specified, words such as "front", "back", "left", "right", "bottom" and / or "top" are only for the convenience of description and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

[0025] The singular forms "a", "said" and "the" used in this specification and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0026] like Figure 1 As shown, the present application provides a micro inverter junction box 100, which includes a shell 11, a metal track 12, a plurality of terminals 13, a plurality of insulating partitions 14 and a grounding bar 15. The shell 11 is used as the main structure of the micro inverter junction box 100, and is used to carry the metal track 12, the plurality of terminals 13, the plurality of insulating partitions 14 and the grounding bar 15, and protect the metal track 12, the plurality of terminals 13, the plurality of insulating partitions 14 and the grounding bar 15. The metal track 12 is located in the shell 11 and connected to the shell 11. The plurality of terminals 13 are fixedly mounted on the metal track 12. The insulating partitions 14 are respectively located between two adjacent terminals 13, so that the insulating partitions 14 can prevent any two adjacent terminals 13 from contacting each other, so as to achieve electrical isolation between any two adjacent terminals 13, thereby avoiding a short circuit between any two adjacent terminals 13, so as to improve the safety of the micro inverter junction box 100. The grounding bar 15 is located inside the shell 11 and connected to the shell 11. The grounding bar 15 can be independent of the metal track 12, that is, the grounding bar 15 has no connection with the metal track 12. The grounding bar 15 is used for grounding. The fault current generated can be quickly introduced into the ground through the grounding bar 15 to avoid unnecessary damage to the equipment; and the grounding bar 15 can effectively reduce electromagnetic interference and improve the stability and reliability of the equipment.

[0027] Through the above arrangement, multiple terminals 13 can be installed on the housing 11 through the metal rails 12, thereby reducing the number of installation points of additional terminals 13 on the housing 11, thereby improving the structural compactness of the micro inverter junction box 100.

[0028] If the terminal 13 is directly mounted on the housing 11, the stress of the housing 11 will be concentrated, thereby affecting the structural strength of the housing 11 and even causing damage to the housing 11. Therefore, the micro inverter junction box 100 of the present application can also integrate the mounting points of the terminal 13 on the metal track 12 to avoid insufficient structural strength of the housing 11 due to too many mounting points of the terminal 13 on the housing 11.

[0029] In addition, through the above arrangement, the plurality of terminal posts 13 can be installed with the housing 11 only through one metal track 12 , thereby improving the installation convenience of the plurality of terminal posts 13 .

[0030] In order to clearly explain the technical solution of this application, the following is also defined: Figure 1 The left, right, top and bottom shown represent the left, right, top and bottom of the micro inverter junction box 100 .

[0031] Specifically, the housing 11 is substantially a hollow rectangular parallelepiped structure. The housing 11 includes a main body 111 and a cover 112, and the cover 112 is rotatably connected to the main body 111, so that the cover 112 can be in a closed state or in an open state to seal the main body 111. When the cover 112 is in the open state, the metal track 12, the plurality of terminals 13, and the plurality of insulating partitions 14 can be disassembled or repaired, thereby improving the maintainability of the metal track 12, the plurality of terminals 13, and the plurality of insulating partitions 14.

[0032] In this embodiment, the main body 111 has an opening, and the metal track 12 and the grounding bar 15 can be installed at the bottom of the main body 111 after passing through the opening of the main body 111, so that the metal track 12 can be located in the shell 11 and fixedly installed at the bottom of the shell 11, and the grounding bar 15 can be set at the bottom of the shell 11.

[0033] Optionally, to improve the insulation of the micro inverter junction box 100 , the shell 11 is made of insulating material, for example, the material of the shell 11 may be polycarbonate, ABS plastic, etc., thereby improving the insulation of the shell 11 and reducing the mass of the shell 11 .

[0034] Optionally, in order to improve the structural strength of the metal track 12 , the material of the metal track 12 may be aluminum alloy, stainless steel, etc., thereby improving the anti-corrosion and anti-rust properties of the metal track 12 .

[0035] Optionally, in order to improve the insulation between two adjacent terminals 13, the insulating partition 14 may be made of epoxy resin or the like. Since the dielectric strength, insulation performance, mechanical strength and corrosion resistance of epoxy insulating materials are all strong, the normal operation of electrical equipment and personal safety can be ensured by setting the material of the insulating partition 14 to epoxy resin, thereby improving the safety of the micro inverter junction box 100.

[0036] It is understandable that the shell 11, metal track 12, and insulating partition 14 may be made of other materials, as long as the shell 11 and insulating partition 14 meet the insulation requirements and the metal track 12 meets the structural strength requirements. This application does not impose any restrictions.

[0037] It should be noted that the type of the terminal 13 can be adjusted according to the number of connected loops to meet different working requirements of the micro inverter junction box 100.

[0038] like Figure 2 As shown, as an optional implementation, four terminals 13 are fixedly installed on the metal track 12, and the four terminals 13 are respectively A-phase terminal 131, B-phase terminal 132, C-phase terminal 133 and N-phase terminal 134. The number of access lines of the terminal 13 determines the number of column levels of each terminal 13, that is, the more the number of access lines of the terminal 13, the more the number of column levels of each terminal 13; the number of access lines of the N-phase terminal 134 is the sum of the number of access lines of the A-phase terminal 131, the B-phase terminal 132, and the C-phase terminal 133.

[0039] Through the above-mentioned arrangement, the single-phase electricity of the micro-inverter junction box 100 can be merged into three-phase electricity, so that the micro-inverter junction box 100 can meet the grid-connected conditions, that is, the micro-inverter junction box 100 can output 380V AC voltage and meet the use requirements of large grid-connected capacity.

[0040] like Figure 3 As shown, as an implementation method, the metal track 12 is in a concave shape, and the metal track 12 includes a bottom plate 121 and two extensions 122, and the two extensions 122 are respectively fixedly connected to the two sides of the bottom plate 121 or formed in one piece. Among them, multiple terminals 13 are fixedly connected to the extensions 122, so that the terminals 13 can be prevented from directly contacting the housing 11, thereby improving the insulation of the micro inverter junction box 100.

[0041] Specifically, after the metal rail 12 and the housing 11 are installed, the metal rail 12 extends substantially along the up-down direction of the micro inverter junction box 100, and the bottom plate 121 and the two extensions 122 also extend substantially along the up-down direction of the micro inverter junction box 100. In particular, along the left-right direction of the micro inverter junction box 100, the two extensions 122 are respectively located on the left and right sides of the bottom plate 121 and are fixedly connected or integrally formed with the left and right sides of the bottom plate 121.

[0042] In the present application, in order to reduce the difficulty of processing the metal track 12 , the bottom plate 121 and the two extension portions 122 are configured to be integrally formed.

[0043] It should be noted that the length of the metal track 12 along the vertical direction of the micro inverter junction box 100 can be adjusted according to the model and number of the terminal posts 13 to meet the use requirements of the micro inverter junction box 100 .

[0044] like Figure 3 and Figure 4 As shown, in this embodiment, the bottom plate 121 is provided with a mounting hole 1211, and the mounting hole 1211 can be passed through by the first fastener 16. Specifically, the first fastener 16 is passed through the mounting hole 1211 and fixes the metal track 12 to the bottom of the housing 11. The first fastener 16 can be set as a bolt, and the bottom of the housing 11 is provided with a mounting post 113, and the mounting post 113 is internally threaded. The first fastener 16 is passed through the mounting hole 1211 and is fixedly connected to the mounting post 113, so that the metal track 12 can be fixed to the housing 11, and the connection stability of the metal track 12 and the housing 11 is improved.

[0045] As an implementation method, a mounting portion 135 is provided at the edge of the terminal 13, and the mounting portion 135 is connected to at least one extension portion 122 of the metal track 12 through a second fastener 17. The second fastener 17 can be a bolt, which is passed through the mounting portion 135 and fixedly connected to the extension portion 122.

[0046] Optionally, a threaded hole may be provided on the extension portion 122 , and the second fastener 17 is passed through the mounting portion 135 and threadedly connected to the threaded hole on the extension portion 122 , so that the terminal 13 can be fixedly connected to the metal rail 12 .

[0047] It is understandable that the connection method between the extension portion 122 and the mounting portion 135 may also be other fixed connection methods, and the present application does not limit this.

[0048] Exemplarily, the width of the bottom plate 121 along the left-right direction of the micro-inverter junction box 100 is substantially consistent with the width of the terminal post 13 along the left-right direction of the micro-inverter junction box 100, and because the two extensions 122 and the bottom plate 121 form a concave structure, the terminal post 13 can be slidably connected with the metal track 12, that is, the metal track 12 can guide the terminal post 13 to facilitate the installation of the terminal post 13 and the metal track 12. Optionally, the present application can adjust the width of the bottom plate 121 along the left-right direction of the micro-inverter junction box 100 so that the terminal post 13 can be interference-fitted with the metal track 12, thereby further improving the connection stability between the terminal post 13 and the metal track 12, thereby improving the working stability of the micro-inverter junction box 100.

[0049] like Figure 2 and Figure 3 As shown, as an implementation method, there is a connection gap between two adjacent terminals 13, and the insulating partition 14 is inserted into the connection gap. The connection gap can be adjusted by the distance between the two adjacent terminals 13, so that the insulating partition 14 of different thicknesses can be inserted between the two adjacent terminals 13 according to actual needs, so that the insulating partition 14 can meet the insulation requirements of different terminals 13.

[0050] Specifically, the connection gap can be adjusted by sliding two adjacent connecting posts 13 on the metal track 12. Through the above arrangement, the installation of the insulating partition 14 can be made more convenient, thereby improving the assembly convenience of the micro inverter junction box 100.

[0051] like Figure 1 As shown, the housing 11 is exemplarily provided with a wire outlet hole 114 and a plurality of wire inlet holes 115, wherein the wire outlet hole 114 is used for the incoming wires of the micro inverter junction box 100, and the wire outlet hole 114 is used for the outgoing wires of the micro inverter junction box 100. The number of the wire inlet holes 115 can be adjusted according to the number of the terminals 13; the size of the wire outlet hole 114 can also be adjusted according to the number of the terminals 13, so as to meet the requirements of the incoming and outgoing wires.

[0052] In this embodiment, the outlet hole 114 and the plurality of inlet holes 115 are both located at the lower part of the housing 11, thereby preventing external impurities such as water from entering the housing 11, thereby facilitating the improvement of the safety and service life of the micro-inverter junction box 100. Specifically, the outlet hole 114 and the plurality of inlet holes 115 may be distributed along the left and right directions of the micro-inverter junction box 100, and this application does not limit this.

[0053] In order to further improve the waterproof performance of the housing 11, the micro inverter junction box 100 further includes a plurality of sealing rings 18, which are respectively snapped into the outlet holes 114 and the plurality of inlet holes 115, so that the housing 11 is sealed by the sealing rings 18 to improve the waterproof performance of the housing 11. The material of the sealing ring 18 can be polyurethane, EPDM rubber, chloroprene rubber or silicone, etc., so that the high temperature resistance and water vapor resistance of the sealing ring 18 can be improved, and the sealing ring 18 can be adapted to the waterproof level requirements of the micro inverter junction box 100.

[0054] like Figure 5 and Figure 6 As shown, as an implementation method, the housing 11 is also provided with a clamping portion 116 for mounting the micro inverter junction box 100 to the external device 200, and the clamping portion 116 is located outside the housing 11. Among them, the external device 200 can be a photovoltaic module, etc. Take the external device 200 as an example for explanation. The micro inverter junction box 100 can be connected to the back of the photovoltaic module through the clamping portion 116, so that the micro inverter junction box 100 can avoid direct sunlight, thereby improving the service life of the micro inverter junction box 100.

[0055] Specifically, the clamping portion 116 includes at least one fixing buckle 1161, and the fixing buckle 1161 is provided with a first slot 1161a and a second slot 1161b that are interconnected, the first slot 1161a basically extends in the horizontal direction, and the first slot 1161a has an opening located at the edge of the fixing buckle 1161, and the second slot 1161b basically extends in the vertical direction. In this application, the horizontal direction refers to the left and right direction of the micro inverter junction box 100, and the vertical direction refers to the up and down direction of the micro inverter junction box 100. More specifically, the photovoltaic assembly includes a track 21 for fixing the micro inverter junction box 100. The track 21 has a bolt mounting portion 211. When installing the micro inverter junction box 100 and the track 21 of the photovoltaic module, first screw the bolt 22 on the bolt mounting portion 211, then make the bolt 22 pass through the first slot 1161a and be located in the second slot 1161b, and then tighten the bolt 22, so that the bolt 22 can fix the micro inverter junction box 100 on the track 21 of the photovoltaic module.

[0056] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. A micro inverter junction box, characterized in that: include: case; A metal track, the metal track is located in the shell and fixedly installed on the bottom of the shell; A plurality of binding posts, wherein the plurality of binding posts are fixedly mounted on the metal track; A plurality of insulating partitions, each of which is located between two adjacent terminals; A grounding bar is disposed at the bottom of the housing and is independent of the metal track.

2. The micro-inverter junction box according to claim 1, characterized in that: The metal track is in a concave shape and comprises a bottom plate and two extension parts. The two extension parts are respectively fixedly connected to two sides of the bottom plate or formed in one piece.

3. The micro-inverter junction box according to claim 2, characterized in that: The bottom plate of the metal track is provided with a mounting hole for the first fastener to pass through, and the first fastener passes through the mounting hole and fixes the metal track to the bottom of the shell.

4. The micro-inverter junction box according to claim 2, characterized in that: A mounting portion is provided at the edge of the terminal post, and the mounting portion is connected to at least one extended portion of the metal track through a second fastener.

5. The micro-inverter junction box according to claim 1, characterized in that: There is a connection gap between two adjacent binding posts, and the insulating partition is inserted into the connection gap.

6. The micro-inverter junction box according to claim 1, characterized in that: The shell is also provided with a wire outlet hole and a plurality of wire inlet holes, and the wire outlet hole and the plurality of wire inlet holes are both located at the lower part of the shell.

7. The micro-inverter junction box according to claim 6, characterized in that: The micro inverter junction box also includes a plurality of sealing rings, which are respectively snap-fitted into the wire outlet holes and the wire inlet holes.

8. The micro-inverter junction box according to claim 1, characterized in that: The housing is also provided with a clamping portion for mounting the micro inverter junction box to an external device, and the clamping portion is located outside the housing.

9. The micro-inverter junction box according to claim 8, characterized in that: The clamping portion includes at least one fixing buckle, and the fixing buckle is provided with a first slot body and a second slot body which are interconnected. The first slot body basically extends in a horizontal direction and has an opening at an edge of the fixing buckle. The second slot body basically extends in a vertical direction.

10. The micro inverter junction box according to claim 1, characterized in that: Four binding posts are fixedly mounted on the metal track, and the four binding posts are respectively an A-phase binding post, a B-phase binding post, a C-phase binding post and an N-phase binding post.

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