Inverter and photovoltaic system

Abstract

An inverter, comprising: a housing; an electronic device mounted in the housing; and a junction box mounted below the housing for defining a space for wiring and / or the extension of a copper busbar. By means of arranging the junction box below the inverter, the inverter can be easily disassembled and removed during individual maintenance and replacement of the inverter, and the safety of cables and devices inside the inverter is ensured, thus reducing material costs.

Description

Inverters and photovoltaic systems

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on July 21, 2023, with application number 2023219569606 and invention name “Inverter and Photovoltaic System”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of photovoltaic power generation technology, and in particular relates to an inverter. Background Art

[0003] Photovoltaic systems contain various electrical devices, including inverters and transformers. The wiring between the inverter and transformer electrically connects the electronic components inside the inverter and the transformer. However, the current wiring method between the inverter and transformer makes it difficult to disassemble the inverter when performing standalone maintenance and replacement, resulting in reduced replacement and maintenance efficiency. In addition, the copper busbar path is long, the space utilization rate is low, and the material cost is high.

[0004] Summary of the Invention

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an inverter that can be easily disassembled when the inverter is individually maintained or replaced, while ensuring the safety of cables and components inside the inverter and reducing material costs.

[0006] In a first aspect, the present application provides an inverter, comprising:

[0007] Box;

[0008] electronic components, the electronic components being installed in the box;

[0009] A junction box is installed below the box body, and defines a space for wiring and / or extending a copper busbar.

[0010] According to the inverter provided in the embodiment of the present application, by providing a detachable junction box at the bottom of the second electrical equipment, the second electrical equipment can be easily disassembled and the second electrical equipment can be separately maintained and replaced while ensuring the safety of cables and components inside the second electrical equipment.

[0011] According to one embodiment of the present application, it further includes:

[0012] A plurality of supporting legs are arranged at intervals on the bottom of the box, and the junction box is installed in the interval space formed between the plurality of supporting legs.

[0013] According to one embodiment of the present application, a first opening is provided on the top of the junction box, and the top of the junction box is assembled on the bottom surface of the box body.

[0014] According to one embodiment of the present application, a second opening is provided at the bottom and / or side of the junction box.

[0015] According to one embodiment of the present application, the junction box includes an AC box, and interfaces of the AC lines and / or copper busbars of the inverter are located in the AC box.

[0016] According to one embodiment of the present application, the junction box includes a DC box, and interfaces of the DC lines and / or copper busbars of the inverter are located in the DC box.

[0017] According to one embodiment of the present application, the junction box includes a DC box and an AC box, the interface of the DC line and / or copper busbar of the inverter is located in the DC box, and the interface of the AC line and / or copper busbar of the inverter is located in the AC box.

[0018] In a second aspect, the present application further provides a photovoltaic system, comprising:

[0019] Photovoltaic panels;

[0020] In any one of the above inverters, the photovoltaic assembly is electrically connected to an input terminal of the inverter.

[0021] According to an embodiment of the present application, there are multiple inverters, and the junction box includes at least one AC box, each of which corresponds to an interface of an AC line of at least one inverter.

[0022] According to an embodiment of the present application, there are multiple inverters, and the junction box includes at least one DC box, each of which corresponds to an interface of a DC line of at least one inverter.

[0023] According to an embodiment of the present application, there are multiple inverters, and there is at least one junction box, and each junction box corresponds to an interface of at least one inverter.

[0024] According to one embodiment of the present application, the plurality of junction boxes are installed in a one-to-one correspondence with the plurality of inverters.

[0025] According to an embodiment of the present application, there is one junction box, and interfaces of multiple inverters are all located in the same junction box.

[0026] According to one embodiment of the present application, there are i junction boxes, k of which are installed in a one-to-one correspondence with k inverters, and each of the remaining ik junction boxes is installed in correspondence with multiple inverters, where k>1, ik≥1.

[0027] According to one embodiment of the present application, a transformer is provided, and the output end of the inverter is electrically connected to the transformer.

[0028] According to one embodiment of the present application, the ring main unit, the output end of the transformer is electrically connected to the ring main unit.

[0029] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0031] FIG1 is a schematic structural diagram of an inverter provided in an embodiment of the present application;

[0032] FIG2 is one of the exploded views of the inverter provided in an embodiment of the present application;

[0033] FIG3 is a second exploded view of the inverter provided in an embodiment of the present application;

[0034] FIG4 is a third exploded view of the inverter provided in an embodiment of the present application;

[0035] FIG5 is a fourth exploded view of the inverter provided in an embodiment of the present application;

[0036] FIG6 is a fifth exploded view of the inverter provided in an embodiment of the present application;

[0037] FIG7 is a wiring diagram of an inverter provided in an embodiment of the present application;

[0038] FIG8 is a schematic diagram of a photovoltaic system according to an embodiment of the present application;

[0039] FIG9 is a second structural diagram of a photovoltaic system provided in an embodiment of the present application;

[0040] FIG10 is a third structural diagram of a photovoltaic system provided in an embodiment of the present application;

[0041] FIG11 is an exploded view of a photovoltaic system provided in an embodiment of the present application.

[0042] Reference numerals: box 100 , junction box 110 , AC box 111 , DC box 112 , second opening 113 , cable 120 , connection space 130 , support leg 140 ; ​​transformer 200 , ring main unit 300 , integrated platform 400 . DETAILED DESCRIPTION

[0043] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0044] The inverter and photovoltaic system according to the embodiments of the present application are described below with reference to FIG. 1 to FIG. 11 .

[0045] An embodiment of the present application provides an inverter, as shown in FIG. 1 to FIG. 11 , which includes a housing 100 , electronic components, and a junction box 110 .

[0046] As shown in FIG1 to FIG6 , a connection space 130 is provided at the bottom of the inverter housing 100 , and a junction box 110 is installed below the housing 100 . The junction box 110 defines a space for wiring and / or extending a copper busbar.

[0047] When the inverter is combined with other electrical equipment to form an integrated machine, the copper busbar is inside the box 100 and there is a cross-copper busbar inside the junction box 110; when the inverter is used as a single machine, there is a copper busbar inside the junction box 110.

[0048] As shown in FIG. 1 to FIG. 11 , the junction box 110 may be a rectangular structure, or may be other shapes with planar upper and lower surfaces, such as a cylindrical structure, and the interior of the junction box 110 may be a hollow structure.

[0049] As shown in FIG1-11 , the junction box 110 can be placed on the ground, the box body 100 can be directly supported on the top of the junction box 110 , and the bottom of the box body 100 can also be detachably connected to the junction box 110 via a snap fastener or other structure.

[0050] As shown in Figures 1 to 11, the bottom of the inverter has a wiring port, which is installed in the junction box 110. One end of the cable 120 is electrically connected to the inverter wiring port, and the other end of the cable 120 passes through the junction box 110 to be electrically connected to other electrical equipment.

[0051] As shown in FIG. 1 to FIG. 11 , the junction box 110 may be made of insulating material to prevent the inverter and other electrical devices electrically connected to the inverter from being electrically interfered with by the junction box 110 during operation.

[0052] As shown in FIG9 , the inverter and the junction box 110 are both placed on an integrated platform 400 , which is placed on the ground. A groove is provided under the ground for interconnection between the inverter and other electrical equipment.

[0053] During the actual implementation process, as shown in Figures 1 to 11, one end of the cable 120 is electrically connected to the wiring port of the inverter, and the other end of the cable 120 passes through the junction box 110 and is electrically connected to the wiring port of other electrical equipment. Since the junction box 110 is placed on the integrated platform 400 and the upper surface of the junction box 110 supports the inverter, a closed space is formed between the bottom surface of the inverter and the bottom of the junction box 110. After connecting the inverter and the corresponding electrical equipment, the part of the cable 120 located in the junction box 110 and the connection between the cable 120 and the inverter are both in the closed space formed by the junction box 110, the inverter and the integrated platform 400.

[0054] When the inverter needs to be maintained or replaced, since the inverter is supported above the junction box 110, the inverter can be lifted separately after the connection between the inverter and the cable 120 is disconnected, thereby performing maintenance or replacement on the inverter.

[0055] By providing a detachable junction box 110 at the bottom of the inverter, the inverter can be maintained and replaced separately after disconnecting the connection between the inverter and the cable 120; by supporting the inverter on the upper surface of the junction box 110, the lower surface of the inverter can be made to fit the upper surface of the junction box 110, so that the part of the cable 120 located in the junction box 110 and the connection between the cable 120 and the inverter are both in a confined space, so as to prevent dust or other impurities from entering the interior of the inverter from the bottom of the inverter and affecting various circuits and devices. In addition, arranging the junction box 110 and the box body 100 separately can reduce the height of the box body 100, shorten the copper busbar path, and thus reduce material costs.

[0056] According to the inverter provided in the embodiment of the present application, by setting a junction box 110 under the inverter, the inverter can be easily disassembled when the inverter is maintained and replaced separately, while ensuring the safety of the cable 120 and the components inside the inverter, thereby reducing material costs.

[0057] In some embodiments, as shown in FIG. 1-FIG . 11 , the inverter further includes a plurality of support legs 140 , which are spaced apart and disposed at the bottom of the box 100 , and the junction box 110 is installed in the space formed between the plurality of support legs 140 .

[0058] As shown in Figures 1 to 11, there can be four supporting legs 140, which are respectively installed at the four corners of the bottom of the inverter, and the four supporting legs 140 are spaced apart from each other to form a separation space. The junction box 110 can be placed in the middle of the separation space formed by the four supporting legs 140, or in other parts of the separation space. The separation space formed by the supporting legs 140 is the connection space 130 located below the inverter.

[0059] According to the inverter provided in the embodiment of the present application, since the junction box 110 is a hollow structure, the junction box 110 itself is relatively thin, and the inverter itself is relatively heavy, a base is provided at the bottom of the inverter to increase the support force for the inverter, thereby improving the installation stability of the inverter and avoiding deformation of the junction box 110 and damage to the inverter caused by the inverter being supported only by the junction box 110 for a long time.

[0060] In some embodiments, as shown in FIG. 3 to FIG. 6 , a second opening 113 is defined on the bottom and / or side of the junction box 110 .

[0061] As shown in Figures 3 to 6, a second opening 113 is provided at the bottom of the junction box 110 at a position corresponding to the groove under the ground for passing the cables 120. Since there are multiple cables 120 for connecting the inverter and other electrical equipment, a second opening 113 that can accommodate multiple cables 120 can be provided, or multiple second openings 113 can be provided to accommodate multiple cables 120 respectively.

[0062] When the cable 120 does not need to pass through the trench under the ground, a second opening 113 can be set on the side of the junction box 110, wherein the second opening 113 can be set on one side or multiple sides of the junction box 110, or the second opening 113 can be set on the bottom and side of the junction box 110, wherein the second opening 113 at the bottom is used for ventilation.

[0063] In actual implementation, during wiring, one end of the cable 120 is electrically connected to the wiring port of the inverter, and the other end of the cable 120 passes through the second opening 113 of the junction box 110 and is electrically connected to other electrical devices.

[0064] By providing the second opening 113 at the bottom or side of the junction box 110 , one end of the cable 120 for electrical connection to other electrical devices can pass through the junction box 110 , making it easier for workers to operate.

[0065] In some embodiments, as shown in FIG7 , a height h between a connection point between the cable 120 and the second electrical device 200 and the bottom surface of the junction box 110 satisfies: 400 mm≤h≤500 mm.

[0066] As shown in FIG7 , the distance between the connection point between the cable 120 and the inverter and the bottom surface of the junction box 110 can be

[0067] The height of the junction box 110 is between 400mm and 500mm, that is, the height of the junction box 110 is between 400mm and 500mm. This makes it easier for the cable 120 that needs to pass through the groove to enter the groove underground and then bend, thereby avoiding the situation where the distance between the connection point between the cable 120 and the inverter and the bending point is short, resulting in the cable 120 being subjected to greater force and breaking when it is bent, while meeting the wiring requirements. It should be noted that, ideally, the distance between the connection point between the cable 120 and the inverter and the bottom surface of the junction box 110 is 450mm.

[0068] It should be noted that the height h between the connection point between the cable 120 and the inverter and the bottom surface of the junction box 110 can also be selected from other appropriate ranges according to needs.

[0069] In some embodiments, the top of the junction box 110 has a first opening, and the top of the junction box 110 is mounted on the bottom surface of the inverter.

[0070] Among them, the junction box 110 can be a concave structure, that is, the first opening at the top of the junction box 110 extends to the four sides of the junction box 110, and the junction box 110 presents an open structure. At this time, the upper surfaces of the four sides of the junction box 110 are all fitted with the inverter to achieve sealing.

[0071] Alternatively, the cross-sectional area of ​​the first opening is set to be larger than the overall cross-sectional area of ​​the connection between all cables 120 and the inverter, and smaller than the cross-sectional area of ​​the top of the junction box 110. At this time, the connection between the cables 120 and the inverter is in the first opening, and the outer surface of the first opening is fitted with the bottom surface of the inverter to achieve sealing. The sealing between the junction box 110 and the inverter can also be achieved by other means.

[0072] The first opening facilitates the connection between the cable 120 and the inverter. The sealed connection between the junction box 110 and the inverter prevents dust or other impurities from entering the inverter through the first opening and affecting the electronic components.

[0073] In some embodiments, as shown in Figures 1-11, the junction box 110 includes a DC box 112 and / or an AC box 111, the interface of the DC line and / or copper bus of the inverter is located in the DC box 112, and the interface of the AC line and / or copper bus of the inverter is located in the AC box 111.

[0074] Among them, as shown in Figures 1 to 11, in some embodiments, the junction box 110 may include a DC box 112 and an AC box 111. The interfaces of the DC line and / or copper busbar of the inverter are located in the DC box 112, and the interfaces of the AC line and / or copper busbar of the inverter are located in the AC box 111. The DC box 112 and the AC box 111 can both be rectangular structures, or frustum structures or other shaped structures. The DC box 112 and the AC box 111 are both installed at the bottom of the inverter, and the two can be arranged side by side, diagonally or in other ways.

[0075] In other embodiments, the junction box 110 may include an AC box 111, and the interfaces of the AC lines and / or copper busbars of the inverter are located inside the AC box 111. When the junction box 110 includes the AC box 111, the top of the AC box 111 may be provided with a first opening, and the bottom and / or side of the AC box 111 may be provided with a second opening 113.

[0076] In other embodiments, the junction box 110 may include a DC box 112, and the interfaces of the DC line and / or copper busbar of the inverter are located in the DC box 112. When the junction box 110 includes the DC box 112, the top of the DC box 112 may be provided with a first opening, and the bottom and / or side of the DC box 112 may be provided with a second opening 113.

[0077] During the actual implementation process, one end of the DC line is electrically connected to the interface of the DC line of the inverter, and the other end of the DC line passes through the first opening, the internal hollow structure, and the second opening 113 of the DC box 112 in sequence and is electrically connected to the interface of other electrical equipment, and the connection between the DC line and the inverter is located in the DC box 112; one end of the AC line is electrically connected to the interface of the AC line of the inverter, and the other end of the AC line passes through the first opening, the internal hollow structure, and the second opening 113 of the AC box 111 in sequence and is electrically connected to the interface of other electrical equipment, and the connection between the AC line and the inverter is located in the AC box 111. If a copper busbar is used to achieve electrical connection, the interface of the copper busbar is located in the corresponding DC box 112 or AC box 111.

[0078] It can be understood that the DC box 112 and the AC box 111 are both installed in the connecting space 130 below the box body 100, that is, the AC and DC spaces of the inverter are shared, which can save space for the inverter and reduce material costs compared to setting up the AC and DC separately.

[0079] By dividing the junction box 110 into an AC box 111 and a DC box 112, the cables 120 connecting the inverter and other electrical equipment can be divided into AC and DC zones, so that the staff can quickly inspect and repair the cables 120 later. At the same time, the AC and DC spaces of the inverter are shared, which can save space.

[0080] As shown in FIG8-FIG11, an embodiment of the present application further provides a photovoltaic system, which includes a photovoltaic module and an inverter as described in any of the above embodiments, wherein the photovoltaic module is electrically connected to an input terminal of the inverter.

[0081] During the actual implementation process, the transformer 200 and the inverter are both installed on the integrated platform 400. The photovoltaic components convert solar energy into electrical energy and input the electrical energy into the inverter. The inverter converts direct current into alternating current and outputs it to the corresponding electrical equipment.

[0082] According to the photovoltaic system provided by the embodiments of the present application, by adopting the inverter of any of the above embodiments, the safety of the cable 120 and the components inside the inverter can be ensured while facilitating the disassembly of the inverter and performing separate maintenance and replacement of the inverter.

[0083] In some embodiments, as shown in FIG. 8 to FIG. 11 , the photovoltaic system further includes a transformer 200 , and the output end of the inverter is electrically connected to the transformer 200 .

[0084] As shown in Figures 8 to 11, one end of the DC line of the inverter is electrically connected to the interface of the DC line of the inverter, and the other end of the DC line passes through the first opening, the internal hollow structure, the second opening 113 and the groove under the ground of the DC box 112 in sequence and is electrically connected to the interface of the transformer 200; one end of the AC line of the inverter is electrically connected to the interface of the AC line of the inverter, and the other end of the AC line passes through the first opening, the internal hollow structure and the second opening 113 of the AC box 111 in sequence and is electrically connected to the interface of the transformer 200.

[0085] By configuring the transformer 200 , the voltage output by the inverter can be converted into voltages of different values ​​to meet different needs.

[0086] In some embodiments, as shown in FIG9 , the photovoltaic system further includes a ring main unit 300 , and the output end of the transformer 200 is electrically connected to the ring main unit 300 .

[0087] As shown in FIG9 , the inverter, transformer 200 and ring main unit 300 are all installed on the integrated platform 400. By setting up the ring main unit 300, the reliability of power distribution can be improved when distributing power to industrial and mining enterprises, residential areas, ports and high-rise buildings.

[0088] In some embodiments, there are multiple inverters, and the junction box 110 includes at least one AC box 111 , each AC box 111 corresponding to an AC line interface of at least one inverter.

[0089] The present embodiment is described in detail below based on four different schemes.

[0090] 1. Multiple inverters and multiple AC boxes 111 are installed in a one-to-one correspondence.

[0091] There may be three inverters and three AC boxes 111 , with one AC box 111 installed under each inverter.

[0092] 2. Some of the multiple inverters are installed in a one-to-one correspondence with at least one AC box 111 , and the AC line interfaces of the remaining inverters are located in the same AC box 111 .

[0093] For example, there may be four inverters and three AC boxes 111 , wherein two inverters are installed in a one-to-one correspondence with the two AC boxes 111 , and the AC line interfaces of the remaining two inverters are both located in the third AC box 111 .

[0094] 3. Some of the multiple inverters are installed in a one-to-one correspondence with at least one AC box 111, and each of the remaining AC boxes 111 is installed in a corresponding correspondence with multiple inverters.

[0095] For example, there may be six inverters and four AC boxes 111 , wherein two inverters are installed in a one-to-one correspondence with two AC boxes 111 , and the remaining two AC boxes 111 are installed in a corresponding correspondence with two inverters, respectively.

[0096] 4. Multiple inverters are installed corresponding to the same AC box 111.

[0097] For example, there may be three inverters and one AC box 111 , and the interfaces of the AC lines of the three inverters are all located in the one AC box 111 .

[0098] It should be noted that there is no limit on the number of inverters and AC boxes 111, and different installation solutions can be selected according to different needs.

[0099] By providing at least two inverters, the overall AC / DC switching efficiency of the inverter can be improved. Meanwhile, by providing multiple AC boxes 111 and correspondingly installing multiple inverters, the applicable scope of the AC box 111 can be expanded.

[0100] In some embodiments, there are multiple inverters, and the junction box 110 includes at least one DC box 112 . Each DC box 112 corresponds to an interface of a DC line of at least one inverter.

[0101] The present embodiment is described in detail below based on four different schemes.

[0102] 1. Multiple inverters and multiple DC boxes 112 are installed in a one-to-one correspondence.

[0103] For example, there may be three inverters and three DC boxes 112 , with one DC box 112 installed under each inverter.

[0104] 2. Some of the multiple inverters are installed in a one-to-one correspondence with at least one DC box 112 , and the AC line interfaces of the remaining inverters are located in the same DC box 112 .

[0105] For example, there may be four inverters and three DC boxes 112 , wherein two inverters are installed in a one-to-one correspondence with the two DC boxes 112 , and the DC line interfaces of the remaining two inverters are both located in the third DC box 112 .

[0106] 3. Some of the multiple inverters are installed in a one-to-one correspondence with at least one DC box 112, and each of the remaining DC boxes 112 is installed in a corresponding correspondence with multiple inverters.

[0107] For example, there may be six inverters and four DC boxes 112 , wherein two inverters are installed in a one-to-one correspondence with two DC boxes 112 , and the remaining two DC boxes 112 are installed in a corresponding correspondence with two inverters respectively.

[0108] 4. Multiple inverters are installed corresponding to the same DC box 112.

[0109] For example, there may be three inverters and one DC box 112 , and the interfaces of the DC lines of the three inverters are all located in the one DC box 112 .

[0110] It should be noted that there is no limit to the number of inverters and DC boxes 112, and different installation solutions can be selected according to different needs.

[0111] By providing at least two inverters, the overall AC / DC switching efficiency of the inverter can be improved. Meanwhile, by providing multiple DC boxes 112 and correspondingly installing multiple inverters, the applicable scope of the AC box 111 can be expanded.

[0112] In some embodiments, there are multiple inverters and at least one junction box 110 , and each junction box 110 corresponds to an interface of at least one inverter.

[0113] By providing multiple inverters, the overall AC / DC switching efficiency of the inverters can be improved. Meanwhile, by providing multiple junction boxes 110 and installing them correspondingly to the multiple inverters, the applicable scope of the junction boxes can be expanded.

[0114] In some embodiments, multiple junction boxes 110 are installed in a one-to-one correspondence with multiple inverters.

[0115] For example, there may be three inverters and three junction boxes 110 , with one junction box 110 installed under each inverter.

[0116] By installing multiple junction boxes 110 in a one-to-one correspondence with multiple inverters, the wiring of multiple inverters can be distinguished, thereby improving the efficiency of subsequent maintenance.

[0117] In some embodiments, there is one junction box 110 , and interfaces of multiple inverters are all located in the same junction box 110 .

[0118] For example, there may be three inverters and one junction box 110 , and the interfaces of the three inverters are all located in the one junction box 110 .

[0119] By setting the interfaces of multiple inverters to be located in the same junction box 110, the number of junction boxes 110 can be reduced, thereby reducing the production cost of the photovoltaic system to a certain extent.

[0120] In some embodiments, there are i junction boxes 110 , k junction boxes 110 are installed in a one-to-one correspondence with k inverters, and each of the remaining ik junction boxes 110 is installed in correspondence with multiple inverters, where k>1 and ik≥1.

[0121] For example, there may be six inverters and four junction boxes 110 , wherein two inverters are installed in a one-to-one correspondence with two junction boxes 110 , and the remaining two junction boxes 110 are installed in a corresponding correspondence with two inverters, respectively.

[0122] By arranging the inverter and the junction box 110 according to the above-mentioned installation method, the number of the junction boxes 110 can be reduced to a certain extent, thereby reducing the production cost.

[0123] In other embodiments, as shown in Figure 11, there are three inverters, and the junction box 110 includes three DC boxes 112 and one AC box 111, wherein the three DC boxes 112 are installed in a one-to-one correspondence with the three inverters, that is, the interfaces of the DC lines of the three inverters are respectively located in three different DC boxes 112, and the interfaces of the AC lines of the three inverters are all located in the same AC box 111, and the AC lines of the three inverters are all electrically connected to the transformer 200 through the same AC box 111.

[0124] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.

[0125] In the description of this application, it should be understood that the terms "lateral", "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0126] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0127] In the description of this application, “plurality” means two or more.

[0128] In the description of the present application, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0129] In the description of this application, a first feature “on”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0130] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0131] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An inverter, characterized in that: include: Box; An electronic device, wherein the electronic device is installed in the box; A junction box is installed below the box body, and defines a space for wiring and / or extending a copper busbar.

2. The inverter according to claim 1, characterized in that: Also includes: A plurality of supporting legs are arranged at intervals at the bottom of the box, and the junction box is installed in the interval space formed between the plurality of supporting legs.

3. The inverter according to claim 1, characterized in that: The top of the junction box is provided with a first opening, and the top of the junction box is assembled on the bottom surface of the box body.

4. The inverter according to claim 1, characterized in that: The bottom and / or side of the junction box is provided with a second opening.

5. The inverter according to any one of claims 1 to 4, characterized in that: The junction box includes an AC box, and interfaces of the AC line and / or copper busbar of the inverter are located in the AC box.

6. The inverter according to any one of claims 1 to 4, characterized in that: The junction box includes a DC box, and interfaces of the DC line and / or copper busbar of the inverter are located in the DC box.

7. The inverter according to any one of claims 1 to 4, characterized in that: The junction box includes a DC box and an AC box. The interfaces of the DC line and / or copper busbar of the inverter are located in the DC box, and the interfaces of the AC line and / or copper busbar of the inverter are located in the AC box.

8. A photovoltaic system, characterized in that: include: Photovoltaic panels; The inverter according to any one of claims 1 to 7, wherein the photovoltaic assembly is electrically connected to an input terminal of the inverter.

9. The photovoltaic system according to claim 8, characterized in that: There are multiple inverters, and the junction box includes at least one AC box. Each AC box corresponds to an interface of an AC line of at least one inverter.

10. The photovoltaic system according to claim 8, characterized in that: There are multiple inverters, and the junction box includes at least one DC box, each of which corresponds to an interface of a DC line of at least one inverter.

11. The photovoltaic system according to claim 8, characterized in that: There are multiple inverters and at least one junction box, and each junction box corresponds to an interface of at least one inverter.

12. The photovoltaic system according to claim 11, characterized in that: The plurality of junction boxes are installed in one-to-one correspondence with the plurality of inverters.

13. The photovoltaic system according to claim 11, characterized in that: There is one junction box, and interfaces of multiple inverters are all located in the same junction box.

14. The photovoltaic system according to claim 11, characterized in that: There are i junction boxes, k junction boxes are installed in one-to-one correspondence with k inverters, and each of the remaining ik junction boxes is installed in correspondence with multiple inverters, wherein k>1, ik≥1.

15. The photovoltaic system according to any one of claims 8 to 14, characterized in that: Also includes: A transformer, the output end of the inverter is electrically connected to the transformer.

16. The photovoltaic system according to claim 15, characterized in that: Also includes: A ring main unit, wherein the output end of the transformer is electrically connected to the ring main unit.

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