Inverter and inverter system

Abstract

An inverter and an inverter system, the inverter including an inverter module and a power distribution unit, the inverter module has a first direction and a second direction perpendicular to each other, the inverter module is provided with a DC input end and an AC output end, the DC input end and the AC output end are distributed on both sides of the inverter module along the first direction, the power distribution unit includes a DC module and an AC module, the DC module and the AC module are provided on the same end of the inverter module along the second direction, the DC input end faces the power distribution unit, the AC output end faces the power distribution unit, the DC module is electrically connected to the DC input end, and the AC module is electrically connected to the AC output end. The technical solution of the present application can reduce the amount of cables used in the inverter and improve the safety and maintainability of the operation of the inverter.

Description

[Technical Field]

[0001] This application claims priority from a Chinese patent application bearing application number 202220682108.3 and entitled "Inverter and Inverter System," filed with the China Patent Office on March 25, 2022, the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of inverter devices, and in particular to inverters and inverter systems. [Background technology]

[0003] At present, inverters for photovoltaic systems mainly consist of centralized inverters and array inverters (also known as string inverters).For large-scale ground power plants, array inverters have obvious advantages in terms of MPPT optimization, but their distributed layout method has the disadvantages of being relatively inconvenient in installation and maintenance, and having long cable routes and high losses. Summary of the Invention [Problem to be solved by the invention]

[0004] A main object of the present application is to provide an inverter and an inverter system that reduce the amount of cable used in the inverter and improve the safety of operation and ease of maintenance of the inverter. [Means for solving the problem]

[0005] In order to achieve the above object, the present application provides an inverter, the inverter comprising: an inverter module having a first direction and a second direction perpendicular to each other, the inverter module having a DC input terminal and an AC output terminal, the DC input terminal and the AC output terminal being distributed on both sides of the inverter module along the first direction; a power distribution unit including a DC module and an AC module, the DC module and the AC module being provided at the same end of the inverter module along the second direction; Including, The DC input terminal faces the power distribution unit, the AC output terminal faces the power distribution unit, the DC module is electrically connected to the DC input terminal, and the AC module is electrically connected to the AC output terminal.

[0006] Optionally, said DC input terminal faces said power distribution unit and said AC output terminal faces said power distribution unit.

[0007] Optionally, the DC module includes a DC switch and a DC busbar, and the AC module includes an AC switch and an AC busbar; The DC switch is electrically connected to the DC input terminal via the DC bus bar, and the AC output terminal is electrically connected to the AC bus bar via the AC switch.

[0008] Optionally, the DC module further comprises a DC combiner box, and the AC module further comprises an AC combiner box; the DC combiner box and the AC combiner box are arranged side by side along the first direction, the DC combiner box is located on a side where the AC output terminal is located, and the AC combiner box is located on a side where the DC input terminal is located; The DC switch and the AC switch are each independently provided within the DC combiner box, and the DC bus bar and the AC bus bar are each independently provided within the AC combiner box.

[0009] Optionally, the DC busbars and the AC busbars are arranged along the second direction, with the AC busbars located on a side of the DC busbars away from the inverter modules.

[0010] Optionally, the inverter module further has a third direction perpendicular to the first direction and the second direction, and the DC switch and the AC switch are arranged along the third direction.

[0011] In order to achieve the above object, the present application provides an inverter system, which includes a base and at least two inverters as described above, wherein the at least two inverters are arranged side by side on the base in a third direction, and the third direction is perpendicular to the first direction and the second direction.

[0012] Optionally, the inverters are arranged in two rows, the two rows of inverters being symmetrically spaced apart, with DC input terminals of the inverters in the two rows facing each other and AC input terminals of the inverters in the two rows being back-to-back.

[0013] Optionally, said inverter module is slidably connected to said base such that said inverter module is detachable from said base.

[0014] Optionally, a slide rail is provided on the base, a slider is provided on the inverter module, and the inverter module is slidably fitted onto the slide rail via the slider.

[0015] Optionally, a limiting member is provided at an end of the slide rail, and the slider can abut against the limiting member so that the inverter module is positioned on the base.

[0016] Optionally, the inverter module defines a first end and a second end along the second direction, the first end being closer to the power distribution unit than the second end; A first heat dissipation duct is provided within the base, and the flow direction of the first heat dissipation duct is a direction in which heat flows into the base along the first direction corresponding to the first end and flows out of the base along the second direction corresponding to the second end.

[0017] Optionally, a second heat dissipation duct is provided in the base, the flow direction of the second heat dissipation duct is parallel to the first direction and / or the third direction, and the second heat dissipation duct corresponds to the power distribution unit.

[0018] Optionally, the flow direction of the second heat dissipation duct is along the first direction or the third direction through the substrate; or The flow direction of the second heat dissipation duct is a direction that forms a circulating flow along the first direction and the third direction, and a heat exchanger is provided on the base, and the cooling end of the heat exchanger is located within the second heat dissipation duct and the heating end of the heat exchanger is located outside the base.

[0019] In the technical solution of this application, the power distribution unit, i.e., the DC module and the AC module, are both located at the same end of the inverter module, thereby making the overall structure of the inverter compact. At the same time, the DC input terminal and AC output terminal of the inverter module are both oriented toward the power distribution unit, thereby achieving the effect of perpendicular connection of the DC wiring and AC wiring between the inverter module and the DC module and the AC module, and further reducing the amount of cable used due to the bending radius of the cable, thereby reducing the overall cable use of the inverter. By reducing the bending radius of the cable, the distance between the inverter module and the power distribution unit can be further reduced and the center of gravity of the inverter module can be lowered, thereby improving operational safety and maintenance.

[0020] In order to more clearly explain the technical solutions in the embodiments of the present application or the prior art, the following will briefly explain the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on the structures shown in these drawings without any creative work. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a schematic diagram of an embodiment of an inverter system according to the present invention; [Figure 2] 1 is a schematic diagram of another embodiment of an inverter system according to the present invention; [Figure 3] Schematic diagram of the inverter in the inverter system shown in Figure 1 [Figure 4] 2 is a schematic diagram of the inverter of the inverter system shown in FIG. 1 from another perspective; [Figure 5] A schematic diagram of the inverter system shown in Figure 1, in which the inverter slides against the base. [Figure 6] 1. FIG. 4 is a schematic diagram illustrating another view angle of the inverter of the inverter system shown in FIG. 1 sliding relative to the base. [Figure 7] Schematic diagram of the first heat dissipation duct of the inverter system shown in FIG. 1 [Figure 8] Schematic diagram of the second heat dissipation duct of the inverter system shown in FIG. 1 [Explanation of symbols]

[0022] [Table 1] DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, the technical solutions in the embodiments of this application will be clearly and completely explained in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only some of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without any creative work fall within the scope of protection of this application.

[0024] It should be noted that, in the examples of the present application, when directional indications (e.g., up, down, left, right, front, back, etc.) are used only to explain the relative positional relationships, movement conditions, etc. between parts in a certain specific posture (as shown in the drawings), and when that specific posture changes, the directional indication also changes accordingly.

[0025] Furthermore, when the examples of this application contain terms such as "first" and "second," these terms are used for descriptive purposes only and should not be understood as indicating or implying their relative importance or the number of technical features indicated. Therefore, features defined by "first" and "second" may explicitly or implicitly include at least one of the features. Furthermore, technical solutions in each example may be combined with each other, but this must be based on what a person skilled in the art can achieve. If a combination of technical solutions contradicts or is not feasible, the combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this application.

[0026] The present application provides an inverter 10 .

[0027] 1 and 4, the inverter 10 includes an inverter module 11 and a power distribution unit. The inverter module 11 has a first direction and a second direction perpendicular to each other. The inverter module 11 has a DC input terminal 111 and an AC output terminal 112, which are distributed on both sides of the inverter module 11 along the first direction. The power distribution unit includes a DC module 12 and an AC module 13, which are disposed on the same end of the inverter module 11 along the second direction, with the DC input terminal 111 facing the power distribution unit and the AC output terminal 112 facing the power distribution unit. The DC module 12 is electrically connected to the DC input terminal 111, and the AC module 13 is electrically connected to the AC output terminal 112.

[0028] 1, the X direction is the first direction, the Z direction is the second direction, and the Y direction is the third direction, and the following descriptions of directions and coordinates can be made with reference to FIG. 1. For ease of explanation, the following description will be given with the first direction as the front-to-back direction, the second direction as the up-down direction, and the third direction as the left-to-right direction.

[0029] Specifically, the inverter 10, which is composed of an inverter module 11 and a power distribution unit, has a two-layer structure, with the inverter module 11 located on the upper layer and the power distribution unit, i.e., the DC module 12 and AC module 13, located on the lower layer. The input terminal of the DC module 12 is connected to an external DC device, such as a combiner box or energy storage device. The output terminal of the DC module 12 is connected to the DC input terminal 111 of the inverter module 11. The input terminal of the AC module 13 is connected to the AC output terminal 112 of the inverter module 11. The output terminal of the AC module 13 is connected to an external load or transformer. The inverter module 11 converts input DC power into AC power. This configuration achieves the function of converting DC power from an external DC device into AC power and outputting it to an external load.

[0030] In this technical solution, the power distribution unit, i.e., the DC module 12 and the AC module 13, are both located at the same end of the inverter module 11, thereby enabling a compact configuration of the inverter 10. At the same time, by arranging the DC input terminal 111 and the AC output terminal 112 of the inverter module 11 facing the power distribution unit, i.e., by arranging the DC output terminal 112 in a vertical direction (second direction), compared to when the DC output terminal 112 is arranged horizontally (first direction), the inverter 10 achieves the effect of vertically connecting the DC wiring and AC wiring between the inverter module 11 and the DC module 12 and the AC module 13. Furthermore, the amount of cable used in the inverter 10 can be reduced due to the bending radius of the cables. The smaller bending radius of the cables further reduces the distance between the inverter module 11 and the power distribution unit, lowering the center of gravity of the inverter module 11, thereby improving safety and ease of maintenance.

[0031] In one embodiment, referring to Figures 3 and 4, the DC module 12 includes a DC switch 122 and a DC bus bar 123, and the AC module 13 includes an AC switch 132 and an AC bus bar 133, where the DC switch 122 is electrically connected to the DC input terminal 111 via the DC bus bar 123, and the AC output terminal 112 is electrically connected to the AC bus bar 133 via the AC switch 132.

[0032] Specifically, the input end of the DC module 12 is a DC switch 122, the output end of the DC module 12 is a DC bus bar 123, and the DC switch 122 is connected to the DC bus bar 123. The DC module 12 further includes a DC connection cable 124, and the DC bus bar 12 is connected to the DC input end 111 of the inverter module 11 via the DC connection cable 124. The input end of the AC module 13 is an AC switch 132, and the output end of the AC module 13 is an AC bus bar 133, and the AC switch 132 is connected to the AC bus bar 133. The AC module 13 further includes an AC connection cable 134, and the AC switch 132 is connected to the AC output end 112 of the inverter module 11 via the AC connection cable 134. An external DC device is connected to the DC switch 122 via the DC input cable.

[0033] The DC switch 122 may be a circuit breaker / load switch, and the AC switch 132 may be a fuse-coupled switch. After input from an external DC device, the current passes through the DC circuit breaker / load switch in the DC module 12 and is connected in series by a DC bus bar 123 (copper bus bar), then enters the DC input terminal 111 of the inverter module 11, and then is output from the AC output terminal 112 of the inverter module 11 to the fuse-coupled switch of the AC module 13, and finally enters the AC combiner box 131 and is combined via the AC bus bar 133 (copper bus bar).

[0034] The vertical connection between the inverter module 11 and the DC module 12 and AC module 13 reduces the amount of cable used due to the bending radius of the DC connection cable 124 and the AC connection cable 134, thereby reducing the amount of cable used overall for the inverter module 11. The smaller bending radius of the DC connection cable 124 and the AC connection cable 134 further reduces the distance between the inverter module 11 and the power distribution unit, and the mounting center of gravity of the inverter module 11 can be lowered, resulting in improved safety for operators and easier maintenance.

[0035] In one embodiment, referring to Figures 3 and 4, the DC module 12 further includes a DC combiner box 121, and the AC module 13 further includes an AC combiner box 131, the DC combiner box 121 and the AC combiner box 131 are arranged side by side in a first direction, the DC combiner box 121 is located on the side where the AC output terminal 112 is located, and the AC combiner box 131 is located on the side where the DC input terminal 111 is located, the DC switch 122 and the AC switch 132 are independently arranged in the DC combiner box 121, and the DC busbar 123 and the AC busbar 133 are independently arranged in the AC combiner box 131.

[0036] Specifically, the DC combiner box 121 and the AC combiner box 131 are aligned in the front-to-rear direction, and the AC module 13 is located above both the DC combiner box 121 and the AC combiner box 131. The DC combiner box 121 is provided with an openable and closable movable door on the side away from the AC combiner box 131 so as to enclose or expose the DC combiner box 121. By jointly installing the DC switch 122 and the AC switch 132 in the DC combiner box 121, it is convenient for an operator to directly operate the switch device on the side of the inverter 10 where the DC combiner box 121 is located, and this can improve the safety of the operator's operation and ease of maintenance.

[0037] In one embodiment, referring to FIG. 4, the DC busbar 123 and the AC busbar 133 are arranged in a second direction, with the AC busbar 133 located on the side of the DC busbar 123 away from the inverter module 11.

[0038] Specifically, the DC busbar 123 is disposed behind the DC combiner box 121 in the upper space within the AC combiner box 131. That is, the DC busbar 123 and the AC busbar 133 are mounted together within the AC combiner box 131, with the DC busbar 123 located above the AC busbar 133. A partition may be provided between them to prevent them from interfering with each other. Correspondingly, the DC switch 122 is positioned slightly higher than the AC switch 132. Because the AC switch 132 (fused combination switch) has an up-down connection, the AC combiner box 131 is disposed behind the DC combiner box 121, and the wires from the fused combination switch enter the AC combiner box 131 and connect to the AC busbar 133, minimizing the length of the path and avoiding crossing of the AC and DC paths. In addition, the DC input terminal 111 of the inverter module 11 is designed to be on the rear side, and the AC output terminal 112 of the inverter module 11 is designed to be on the front side.By designing it in this way, it can be adapted to the device layout below so as to minimize the wiring path between the output terminal of the DC module 12 and the input terminal of the AC module 13 and the inverter module 11.

[0039] In one embodiment, referring to FIG. 3, the inverter module 11 further includes a third direction perpendicular to the first direction and the second direction, and the DC switch 122 and the AC switch 132 are arranged in the third direction.

[0040] Specifically, two DC switches 122 may be provided, with the two DC switches 122 arranged in the center, and two AC switches 132 may be provided, with the two AC switches 132 arranged on both the left and right sides of the two DC switches 122. By providing them in this manner, the AC switches 132 and the DC switches 122 can be offset, thereby avoiding cross wiring.

[0041] The present application further provides an inverter system 100, which includes a substrate 50 and at least two inverters 10, the specific configuration of which is referred to the above embodiments, and the inverter system 100 employs all the technical solutions of all the above embodiments, and therefore has at least all the beneficial effects of the technical solutions of the above embodiments, and therefore the description will be omitted here. The at least two inverters 10 are arranged side by side on the substrate 50 along a third direction, and the third direction is perpendicular to the first direction and the second direction.

[0042] Specifically, the base 50 includes a platform 51 located at the bottom and a support frame 52 connected to the platform 51. The platform 51 is for mounting a plurality of inverters 10, and the support frame 52 forms a plurality of structural spaces for mounting each inverter 10 on the platform 51. The outside of the support frame 52 can be surrounded by a shroud to form a relatively closed space inside the base 50, thereby protecting the inverters 10 and meeting requirements for different IP levels (including aspects such as protection level, dustproofness, and waterproofness) of the inverters 10.

[0043] In one embodiment, referring to FIG. 1 , the inverters 10 are arranged in two rows, the two rows of inverters 10 are arranged symmetrically spaced apart, the DC input terminals 111 of the inverters 10 in the two rows face each other, and the AC input terminals of the inverters 10 in the two rows are back-to-back.

[0044] Specifically, the inverters 10 in each row are arranged in sequence in the left-right direction, and two rows of inverters 10 are arranged front to back, with a gap between the two rows of inverters 10 to ensure wiring space. The AC output terminals 112 of the inverters 10 in each row of the two rows of inverters 10 are all located outside the base 50, and correspondingly, the DC input terminals 111 of the inverters 10 in each row are all located inside the base 50. This arrangement allows the inverters 10 to be aligned with the device layout of the power distribution unit below, and the DC switches 122 and AC switches 132 to be arranged outside the base 50, making it convenient for operators to directly operate the switch devices outside the base 50 and improving operator safety and maintenance. At the same time, the wiring paths between the output terminals of the DC modules 12 and the input terminals of the AC modules 13 and the inverter modules 11 can be minimized, thereby reducing the amount of cable used.

[0045] The base 50 in this embodiment can adopt the external dimensions of a standard 20-foot container to meet transportation requirements. In order to maximize capacity within the spatial dimensions of the base 50, this embodiment uses two rows of inverters 10 symmetrically arranged as shown in Figure 1. In actual operation, a form in which a single row of inverters 10 is arranged on the base 50 can also be adopted as shown in Figure 2.

[0046] In one embodiment, referring to FIGS. 5 and 6, the inverter module 11 is slidably connected to the base 50 such that the inverter module 11 is detachable from the base 50 .

[0047] Specifically, the base 50 includes a platform 51 and a support frame 52 connected to the platform 51, and the inverter module 11 is detachably mounted on the support frame 52. The inverter module 11 is detachably mounted on the support frame 52 by a sliding connection. This makes it convenient for an operator to quickly install and remove the inverter module 11 on the base 50, and also makes it convenient for the operator to quickly replace and maintain the inverter module 11 on the base 50.

[0048] In one embodiment, referring to Figures 5 and 6, a slide rail 53 is provided on the base 50, a slider 14 is provided on the inverter module 11, and the inverter module 11 is slidably fitted onto the slide rail 53 via the slider 14.

[0049] Specifically, the inverter modules 11 and the support frame 52 are connected by sliding, and sliding vises are provided on the upper and lower surfaces where the support frame 52 and the inverter modules 11 fit together, thereby ensuring stability between each inverter 10 and the base 50 during transportation of the inverter system 100. Of course, in actual operation, at least one sliding vis may be used on the upper, lower, or both sides of the inverter module 11.

[0050] In one embodiment, referring to Figures 5 and 6, a limiting member 54 is provided at the end of the slide rail 53, and the slider 14 can abut against the limiting member 54 so that the inverter module 11 is positioned on the base 50.

[0051] Specifically, the limiting member 54 may have a stopper structure in which the end of the slide rail 53 protrudes perpendicularly to the extending direction of the slide rail 53. When the inverter 10 is slid to a predetermined position along the support frame 52, the slider 14 on the inverter 10 abuts against the limiting member 54 at the end of the slide rail 53, stopping the inverter 10 at the predetermined position, thereby ensuring that the inverter module 11 operates normally and does not slide out of position during transportation. The limiting member 54 may be provided on either end of the slide rail 53. It will be understood that the limiting member 54 at one end of the slide rail 53 is a fixed structure, and the limiting member 54 at the other end of the slide rail 53 is a movable structure. The movable limiting member opens when the inverter 10 is installed or removed, and is fixed when the inverter 10 is in normal use.

[0052] In one embodiment, referring to FIG. 7 , the inverter module 11 forms a first end and a second end along the second direction, the first end is closer to the power distribution unit than the second end, and a first heat dissipation duct 55 is provided in the base 50, and the flow direction of the first heat dissipation duct 55 is a direction in which heat flows into the base 50 corresponding to the first end along the first direction and flows out of the base 50 corresponding to the second end along the second direction.

[0053] Specifically, the base 50 includes a platform 51 and a support frame 52 connected to the platform 51. The outside of the support frame 52 can be surrounded by a shroud, forming a relatively closed space inside the base 50 and protecting the inverter 10. In this case, it is necessary to dissipate heat from the inverter 10. In this embodiment, the heat dissipation structure includes a first heat dissipation duct 55 that individually dissipates heat from the inverter modules 11. The first heat dissipation duct 55 can be configured by partitioning the internal space of the base 50 with a baffle plate. In addition, a first air inlet and a first exhaust port of the first heat dissipation duct 55 are opened on the surface of the base 50. The first air inlet is located on a side surface of a first end of the base 50 corresponding to the inverter module 11, and the first exhaust port is located on an upper surface of a second end of the base 50 corresponding to the inverter module 11. At the same time, a first fan can be installed in the first heat dissipation duct 55 to limit the air flow within the first heat dissipation duct 55. In this way, the first heat dissipation duct 55 is configured to operate in a bottom intake / top exhaust mode, which allows the inverter module 11 to effectively dissipate heat and also avoids the thermal influence of the exhaust ports between adjacent inverters 10.

[0054] In one embodiment, referring to FIG. 8 , a second heat dissipation duct 56 is provided in the base 50, and the flow direction of the second heat dissipation duct 56 is parallel to the first direction and / or the third direction, and the second heat dissipation duct 56 corresponds to the power distribution unit.

[0055] In this embodiment, the heat dissipation structure of the base 50 further includes a second heat dissipation duct 56 that individually dissipates heat from the power distribution units. The second heat dissipation duct 56 speeds up the air flow around the power distribution units, allowing for efficient heat dissipation from the power distribution units. The second heat dissipation duct 56 is arranged horizontally, while the first duct is arranged in a downward-upward direction. That is, the system structural layout of this solution uses a spatially vertical arrangement of both ducts in terms of heat dissipation, which minimizes the coupling effect of the two heat dissipation ducts.

[0056] In one embodiment, the flow direction of the second heat dissipation duct 56 is the direction of flow through the substrate 50 along the first direction or the third direction.

[0057] In one embodiment, the second heat dissipation duct 56 has a direct ventilation configuration with some of its air ports directed horizontally, i.e., the second air inlet and second air outlet of the second heat dissipation duct 56 are located at opposite ends of the base 50. A second fan is installed inside the second heat dissipation duct 56 to allow outside air to flow in and out of the second heat dissipation duct 56, thereby achieving efficient heat dissipation from the power distribution unit. At the same time, this arrangement prevents hot air from the power distribution unit from affecting the heat dissipation effect of the inverter module 11.

[0058] In one embodiment, referring to FIG. 8 , the flow direction of the second heat dissipation duct 56 is a direction that forms a circulating flow along the first direction and the third direction, and a heat exchanger 57 is provided on the base 50, and the cooling end of the heat exchanger 57 is located inside the second heat dissipation duct 56, and the heating end of the heat exchanger 57 is located outside the base 50.

[0059] In one embodiment, the second heat dissipation duct 56 takes the form of a heat exchanger 57. The second heat dissipation duct 56 is a closed-loop duct provided in the internal space of the base body 50, and at the same time, a heat exchanger 57 is provided in the base body 50 corresponding to the second heat dissipation duct 56. In this manner, heat from the power distribution unit is removed in an internal circulation manner, exchanged in the heat exchanger 57, and transferred to the outside. In a specific example, as shown in FIG. 8 , the heat exchangers 57 may be attached to both ends of the base body 50 along the third direction. In another specific example, when the inverter system 100 includes two rows of inverters 10 spaced apart, the heat exchanger 57 may be attached to an inner position of the passage between the two rows of inverters 10.

[0060] Whether the second heat dissipation duct 56 adopts the form of direct ventilation or the form of the heat exchanger 57 depends on the requirement of the IP level of the inverter system 100. It is understood that the form of the heat exchanger 57 can meet higher requirements for the IP level of the inverter system 100.

[0061] The above description is merely a preferred embodiment of the present application and does not limit the patent scope of the present application. Based on the inventive concept of the present application, any equivalent structural transformation made by utilizing the contents of the specification and drawings of the present application, or any direct or indirect use in other related technical fields, is all within the patent protection scope of the present application.

Claims

1. An inverter, an inverter module having a first direction and a second direction perpendicular to each other, the inverter module having a DC input terminal and an AC output terminal, the DC input terminal and the AC output terminal being distributed on both sides of the inverter module along the first direction; a power distribution unit including a DC module and an AC module, the DC module and the AC module being provided at the same end of the inverter module along the second direction; Including, the DC input terminal faces the power distribution unit, the AC output terminal faces the power distribution unit, the DC module is electrically connected to the DC input terminal, and the AC module is electrically connected to the AC output terminal; the DC module includes a DC switch and a DC bus bar, and the AC module includes an AC switch and an AC bus bar; the DC switch is electrically connected to the DC input terminal via the DC bus bar, and the AC output terminal is electrically connected to the AC bus bar via the AC switch; the DC module further includes a DC combiner box, and the AC module further includes an AC combiner box; the DC combiner box and the AC combiner box are arranged side by side along the first direction, the DC combiner box is located on a side where the AC output terminal is located, and the AC combiner box is located on a side where the DC input terminal is located; the DC switch and the AC switch are independently provided in the DC combiner box, and the DC bus bar and the AC bus bar are independently provided in the AC combiner box. An inverter characterized by:

2. the DC bus bar and the AC bus bar are arranged along the second direction, and the AC bus bar is located on a side of the DC bus bar away from the inverter module.

2. The inverter according to claim 1 .

3. the inverter module further has a third direction perpendicular to the first direction and the second direction, and the DC switch and the AC switch are arranged along the third direction.

3. The inverter according to claim 2.

4. An inverter system, The inverter system includes a base and at least two inverters according to any one of claims 1 to 3, wherein the at least two inverters are arranged side by side on the base in a third direction, and the third direction is perpendicular to the first direction and the second direction. An inverter system characterized by:

5. The inverters are provided in two rows, the two rows of inverters are provided symmetrically with an interval between them, the DC input terminals of the inverters in the two rows face each other, and the AC output terminals of the inverters in the two rows are back-to-back.

5. The inverter system according to claim 4.

6. the inverter module is slidably connected to the base such that the inverter module is detachable from the base.

5. The inverter system according to claim 4.

7. a slide rail is provided on the base, a slider is provided on the inverter module, and the inverter module is slidably fitted to the slide rail via the slider; 7. The inverter system according to claim 6.

8. a limiting member is provided at an end of the slide rail, and the slider can abut against the limiting member so that the inverter module is positioned on the base; 8. The inverter system according to claim 7.

9. the inverter module defines a first end and a second end along the second direction, the first end being closer to the power distribution unit than the second end; a first heat dissipation duct is provided within the base, and a flow direction of the first heat dissipation duct is a direction in which the first heat dissipation duct flows into the base along the first direction corresponding to the first end and flows out of the base along the second direction corresponding to the second end; 5. The inverter system according to claim 4.

10. a second heat dissipation duct is provided in the base, the flow direction of the second heat dissipation duct is parallel to the first direction and / or the third direction, and the second heat dissipation duct corresponds to the power distribution unit; 5. The inverter system according to claim 4.

11. The flow direction of the second heat dissipation duct is a direction of flow through the base along the first direction or the third direction, or a flow direction of the second heat dissipation duct is a direction that forms a circulation flow along the first direction and the third direction, a heat exchanger is provided on the base, a cooling end of the heat exchanger is located inside the second heat dissipation duct, and a heating end of the heat exchanger is located outside the base; The inverter system according to claim 10 .

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