Inverter device and power conversion device including the same

Abstract

The present invention discloses an inverter device and a power conversion device including the same. The inverter device of the present invention is modularized. Therefore, the power conversion capacity of the inverter panel can be increased by simply increasing the number of inverter devices combined with the inverter panel. In addition, since the inverter panels are connected to each other to form a power conversion device, the power conversion capacity of the inverter panel can be increased by simply increasing the number of inverter panels.

Description

Technical Field

[0001] The present invention relates to an inverter device and a power conversion device including the same, and more particularly, to an inverter device arranged in a module, which can increase the power conversion capacity by arranging a plurality of modular inverter devices. Background Art

[0002] Generally, a power conversion device receives direct current and converts it into alternating current for output, because alternating current is the main power source for household and industrial use.

[0003] At this time, the capacity that the power conversion device can convert at one time or the capacity of AC power that can be stored at one time can be named "power conversion capacity".

[0004] The power conversion device can be installed in an ESS (Energy Storage System) for use. The power conversion capacity of the power conversion device is an important factor that determines the capacity of the ESS in which the power conversion device is installed.

[0005] As components of the power conversion device, there are an inverter and a filter. The inverter performs a function of converting received direct current into alternating current. The filter performs filtering to remove noise from the alternating current converted by the inverter.

[0006] Reference Figure 1 The power conversion device of the prior art includes: a DC panel (DC PNL) for receiving direct current; a stack panel (STACK1 PNL, STACK2 PNL) for converting direct current into alternating current; a filter panel (FIlteR PNL) for filtering the converted alternating current; and an AC panel (AC PNL) for outputting the converted alternating current.

[0007] In this power conversion device, the stack panels (STACK1 PNL, STACK2 PNL) and the filter panel (FIlterPNL) are provided separately, which has the following limitations, and the power conversion device including all the above panels needs to be designed differently as a whole according to the power conversion capacity.

[0008] In addition, the above-mentioned conventional power conversion device has the disadvantage of a complex fastening structure for transmitting direct current to the stack and receiving alternating current.

[0009] Reference Figure 2The conventional power conversion device includes an additional connector to electrically connect the stack disposed on the stacking panel (STACK1 PNL, STACK2 PNL) to the power transfer busbar.

[0010] Specifically, the stack includes a stack busbar (Stack Busbar) protruding toward the stack panels (STACK1 PNL, STACK2 PNL). In addition, the power transmission busbar also includes a portion protruding toward the stack.

[0011] The protruding parts of the stack busbar and the power transmission busbar are connected by a connector. At this time, in order to tighten more reliably, it is necessary to additionally tighten the connector by rivets or bolts.

[0012] Therefore, in the conventional power conversion device, fastening of the stack is necessarily complicated.

[0013] First, the stacking busbars, power transmission busbars, and connectors need to match.

[0014] In addition, since the connector is firmly fastened by rivets or bolts, it is difficult to separate the stack for maintenance or the like.

[0015] Considering that the stack busbar, the power transmission busbar, and the connector are made of copper, a metal with high electrical conductivity, the cost increase caused by the above structure is also a problem that cannot be ignored.

[0016] Korean Patent Gazette No. 10-0997012 (2010.11.25)

[0017] Korean Patent Gazette No. 10-1636630 (2016.07.05.) Summary of the invention

[0018] Problem that the invention aims to solve

[0019] An object of the present invention is to provide an inverter device and a power conversion device including the same that can solve the above-mentioned problems.

[0020] First, an object of the present invention is to provide an inverter device and a power conversion device having a structure capable of changing the power conversion capacity of the power conversion device only by changing the number of inverter devices.

[0021] Another object of the present invention is to provide an inverter device and a power conversion device having a structure capable of realizing a compact power conversion device by reducing the physical size and volume of the power conversion device.

[0022] Another object of the present invention is to provide an inverter device and a power conversion device having a structure that can easily connect the inverter device and a main bus bar for supplying electric power to the inverter device.

[0023] Another object of the present invention is to provide an inverter device and a power conversion device having a structure that allows the inverter device to be easily coupled to an inverter panel and easily separated from the inverter panel.

[0024] Means used to solve problems

[0025] In order to achieve the above-mentioned purpose, the present invention discloses an inverter device, which includes: a first device part, in which an inverter module for converting direct current into alternating current and supplying it to an external load is arranged; a second device part, located adjacent to the first device part, in which a filter for filtering out noise of the alternating current is arranged; and a cover body, in which the first device part and the second device part are accommodated; on one side of the cover body are arranged: an input terminal part for receiving the direct current; and an output terminal part for outputting the alternating current converted by the inverter module; the input terminal part and the output terminal part are configured to be directly connected to a main bus bar, which transmits the direct current to the inverter module or the filter and receives the alternating current from the inverter module or the filter.

[0026] In addition, a partition portion that divides the first device portion and the second device portion may be provided inside the cover body.

[0027] In addition, the first device part may include: a first air intake part, which is formed on one side of the first device part, and air for cooling the inverter module flows into the interior of the first device part through the first air intake part; and a first exhaust part, which is formed on the other side of the first device part opposite to the one side, and air flowing into the interior of the first air intake part is exhausted through the first exhaust part; the second device part may include: a second air intake part, which is formed on one side of the second device part facing the same direction as the one side of the first device part, and air for cooling the filter flows into the interior of the second device part through the second air intake part; and a second exhaust part, which is formed on the other side of the second device part opposite to the one side, and air flowing into the interior of the second air intake part is exhausted through the second exhaust part.

[0028] In addition, in the inverter device, a first air supply section that provides a transfer force to the air flowing inside the first device section may be provided in any one or more of the first air intake section and the first exhaust section, and a second air supply section that provides a transfer force to the air flowing inside the second device section may be provided in any one or more of the second air intake section and the second exhaust section.

[0029] In addition, the present invention provides an inverter panel, which includes: an inverter device that converts direct current into alternating current and supplies it to an external load; and a first main bus that receives direct current from the outside and transmits it to the inverter device, receives the converted alternating current from the inverter device and supplies it to the external load; the inverter device includes: a first device part, in which an inverter module that converts direct current into alternating current and supplies it to an external load is arranged; a second device part, which is located at a position adjacent to the first device part, in which a filter for filtering out noise of the alternating current is arranged; and a cover body, in which the first device part and the second device part are accommodated; on one side of the cover body are arranged: an input terminal part that receives the direct current; and an output terminal part that outputs the alternating current converted by the inverter module; the first main bus bar includes a first port, and the first port is configured to be able to directly connect the first main bus bar to the input terminal part and the output terminal part.

[0030] In addition, the inverter panel may include a first inverter accommodation portion accommodating the inverter device, and the first main bus bar is located adjacent to the first inverter accommodation portion.

[0031] In addition, the inverter panel may include: a second inverter accommodating portion, located adjacent to the first inverter accommodating portion, accommodating the inverter device; and a second main bus bar, receiving the direct current from the outside and inputting it into the inverter device, receiving the converted alternating current from the inverter device and supplying it to the external load; the second main bus bar may include a second port, and the second port is configured to be able to directly connect the second main bus bar to the input terminal portion and the output terminal portion of the inverter device accommodated in the second inverter accommodating portion.

[0032] In addition, the present invention provides a power conversion device, which includes: an inverter device that converts direct current into alternating current and supplies it to an external load; and N inverter panels that accommodate the inverter device; the inverter panel is provided with a main bus bar, the main bus bar receives direct current from the outside and transmits it to the inverter device, receives the converted alternating current from the inverter device and supplies it to the external load, the inverter device includes: a first device part, in which an inverter module that converts direct current into alternating current and supplies it to the external load is arranged; and a second device part, located at a position adjacent to the first device part, in which a filter for filtering out noise of the alternating current is arranged; if each inverter panel among the N inverter panels can be electrically connected to the main bus bars of other inverter panels, the power conversion capacity becomes N times.

[0033] In addition, in the power conversion device, the first main bus bar can extend to one side of the inverter panel and the other side opposite to the one side, and each of the N inverter panels can be arranged in a row in a manner that the main bus bars of other inverter panels are in contact with each other.

[0034] In addition, in the power conversion device, a power input panel for receiving the direct current transmitted from the outside can be provided on one side of the N inverter panels, and a power output panel for transmitting the converted alternating current to the external load can be provided on the other side of the N inverter panels, and the power input panel, the N inverter panels and the power output panel can be electrically connected to each other.

[0035] Effects of the Invention

[0036] According to the present invention, the following effects are achieved.

[0037] First, the inverter device is modularized, and each inverter device includes an inverter module and a filter. Therefore, each inverter device can independently convert direct current into alternating current. Thus, the power conversion capacity of the power conversion device can be increased simply by increasing the number of inverter devices.

[0038] In addition, since the modular inverter device includes a stack and a filter, the physical size and volume of the power conversion device can be reduced, thereby realizing a compact power conversion device.

[0039] In addition, the main bus bar and the inverter device can be electrically connected only by connecting the port to the inverter device. Therefore, the inverter device and the main bus bar can be easily connected.

[0040] In addition, the inverter device can be inserted or removed through the opening formed on one side of the inverter panel. Therefore, it is easy to add an inverter device to increase the power conversion capacity and to remove the inverter device for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a front view of a DC panel and an AC panel of a power conversion device in the prior art.

[0042] Figure 2 is shown for setting Figure 1 Diagram of the configuration of a stack of power conversion devices for supplying electric power.

[0043] Figure 3 It is a perspective view of a power conversion device according to an embodiment of the present invention.

[0044] Figure 4 yes Figure 3 Front view of the power conversion device.

[0045] Figure 5 is set at Figure 3 A side view of an inverter panel of a power conversion device.

[0046] Figure 6 yes Figure 3 Rear view of the power conversion device.

[0047] Figure 7 is set at Figure 3 A three-dimensional diagram of an inverter device of a power conversion device.

[0048] Figure 8 It is shown Figure 7 FIG. 4 is a diagram showing the internal structure of an inverter device.

[0049] Fig. 9 yes Figure 7 Front view of the inverter device.

[0050] Fig.10 It is shown Figure 7 A side view of the internal structure of an inverter device.

[0051] Fig.11 yes Figure 7 Rear view of the inverter unit.

[0052] Fig.12 FIG. 1 is a diagram showing a process of inserting the inverter device according to the embodiment of the present invention into the inverter panel.

[0053] Fig.13 It is a three-dimensional diagram showing the inverter panels of the embodiment of the present invention in a combined state.

[0054] Fig.14 yes Fig.13 main view.

[0055] Fig.15 It is a three-dimensional diagram of an indoor inverter panel according to another embodiment of the present invention.

[0056] Fig.16 yes Fig.15 Front view of the indoor inverter panel.

[0057] Fig.17 It is shown Fig.15 A side view of the internal composition of the indoor inverter panel.

[0058] Fig.18 yes Fig.15 Rear view of the indoor inverter panel.

[0059] Fig.19 It is a three-dimensional diagram of an outdoor inverter panel according to another embodiment of the present invention.

[0060] Fig. 20 yes Fig.19 Front view of the outdoor inverter panel.

[0061] Fig.21 It is shown Fig.19 A side view of the internal structure of the outdoor inverter panel.

[0062] Fig. 22 yes Fig.19 Rear view of the outdoor inverter panel.

[0063] Fig.23 It is a front view of a power conversion device provided with a line conversion panel according to an embodiment of the present invention.

[0064] Fig.24 yes Fig.23 A top view of a power conversion device.

[0065] Fig.25 yes Fig.23 Rear view of the power conversion device.

[0066] Fig.26 yes Fig.23 Right view (a) and left view (b) of the power conversion device.

[0067] Fig. 27 It is shown in Figure 7 Diagram of the air flow process inside the inverter device.

[0068] Fig.28 FIG. 1 is a diagram showing a flow process of air inside the inverter panel according to the embodiment of the present invention.

[0069] Fig.29 It is shown in Fig.15 The indoor inverter panel inside and Fig.19 Diagram of the air flow process inside the outdoor inverter panel.

[0070] Fig.30 It is shown that the Fig.23 Diagram of the internal wiring of a line conversion panel of a power conversion device. DETAILED DESCRIPTION

[0071] Hereinafter, an inverter device, an inverter panel, and a power conversion device including the same according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0072] The terms "front side", "rear side", "left side", "right side", "upper side" and "rear side" used in the following description can refer to Figure 3 , Figure 7 , Figure 8 , Fig.12 , Fig.13 , Fig.15 , Fig.19 , Fig.23 , Fig.25 as well as Fig.30 The coordinate system shown in FIG.

[0073] Unless the context clearly indicates a different meaning, expressions in the singular shall include expressions in the plural.

[0074] 1. Description of the structure of the power conversion device 1 according to the embodiment of the present invention

[0075] Reference Figures 3 to 6 The power conversion device 1 of the illustrated embodiment includes an inverter device 10 , an inverter panel 500 , and a power supply panel 600 .

[0076] As described later, the inverter device 10 according to the embodiment of the present invention is modularized. Specifically, the inverter device 10 includes an inverter module 240 and a filter 340 described later.

[0077] Therefore, each inverter device 10 can convert direct current into alternating current and filter the converted alternating current. When the inverter device 10 is combined with the inverter panel 500 and each inverter panel 500 is electrically connected, the power conversion device 1 according to the embodiment of the present invention is constructed.

[0078] Reference Figure 3 and Figure 4The components of the power conversion device 1 of the illustrated embodiment are arranged in a row in a direction perpendicular to the front side and the rear side, that is, the right side and the left side. The arrangement can be changed.

[0079] A power input panel 610 and a power output panel 620 are provided at the right end and the left end of the power conversion device 1. The power input panel 610 and the power output panel 620 constitute a power panel 600 responsible for inputting and outputting power.

[0080] The positions of the power input panel 610 and the power output panel 620 can be changed to other positions capable of transmitting power to the inverter panel 500 and the inverter device 10 accommodated in the inverter panel 500, and receiving power from the inverter panel 500 and the inverter device 10.

[0081] A first panel air intake portion 511 and a second panel air intake portion 521 are provided on the front side of the inverter panel 500. As described later, the inverter panel 500 according to the embodiment of the present invention has a structure that allows external air to flow in and out. The first panel air intake portion 511 and the second panel air intake portion 521 function as a passage for external air to flow into the inverter panel 500.

[0082] Reference Figure 5 In the illustrated embodiment, a plurality of inverter devices 10 may be accommodated inside the inverter panel 500 .

[0083] Specifically, the inverter panel 500 includes a first inverter receiving portion 510 formed at an upper side and a second inverter receiving portion 520 formed at a lower side of the first inverter receiving portion 510 .

[0084] As will be described later, the first inverter housing portion 510 and the second inverter housing portion 520 may each house an inverter device 10 .

[0085] A first panel air intake portion 511 is formed on the front side surface of the first inverter housing portion 510 , and a first panel air exhaust portion 512 is formed on the rear side surface.

[0086] In addition, a second panel air intake portion 521 is formed on the front side surface of the second inverter housing portion 520 , and a second panel air exhaust portion 522 is formed on the rear side surface.

[0087] Reference Figure 6 The power conversion device 1 of the illustrated embodiment includes an inverter panel 500 having a first panel exhaust portion 512 and a second panel exhaust portion 522 formed on the rear side surface thereof.

[0088] Although not shown in the figure, the power panel 600 may be formed with an additional air inlet (not shown) and an air outlet (not shown) for cooling.

[0089] (1) Description of the inverter device 10

[0090] The inverter device 10 includes a structure for converting the DC power transmitted to the inverter device 10 into AC power. Specifically, the inverter device 10 includes an inverter module 240 that performs the function of converting the power supply. In addition, the inverter device 10 includes a filter 340 (see FIG. 2 ) for filtering the AC power converted by the inverter module 240. Fig.10 ).

[0091] As described above, the inverter device 10 according to the embodiment of the present invention includes the inverter module 240 and the filter 340. That is, the inverter device 10 includes all the components necessary for converting direct current power into alternating current power by itself.

[0092] The inverter device 10 has a predetermined power conversion capacity. In addition, when a plurality of inverter devices 10 are provided and connected to be energized with each other, the power conversion capacity can be increased by the number of the added inverter devices 10 .

[0093] Therefore, the power conversion capacity can be increased simply by providing a plurality of inverter devices 10 .

[0094] Below, refer to Figures 7 to 11 , the inverter device 10 according to the embodiment of the present invention is described in detail.

[0095] The inverter device 10 of the illustrated embodiment includes a housing 100 , a first device portion 200 , a second device portion 300 , and a partition portion 400 .

[0096] 1) Description of the cover body 100

[0097] The cover 100 forms the outer shape of the inverter device 10. In the illustrated embodiment, the cover 100 has a rectangular parallelepiped shape extending toward the front and rear sides, but the shape of the cover 100 may be changed.

[0098] As described later, the inverter device 10 can be accommodated in the inverter panel 500. In this case, the plurality of inverter devices 10 may have any shape as long as they can be stably accommodated in the inverter panel 500.

[0099] The cover body 100 may be formed of an insulating material such as plastic.

[0100] A switch (not shown) or the like for controlling the operation of the inverter device 10 may be provided on the front side of the cover 100 .

[0101] An input terminal 150a and an output terminal 150b are provided on one side of the housing 100. In the illustrated embodiment, the input terminal 150a and the output terminal 150b are provided on the upper front side of the housing 100.

[0102] The input terminal portion 150a functions as a channel for transmitting direct current to the inverter device 10. In addition, an electrical signal for driving and controlling the inverter device 10 may be transmitted to the input terminal portion 150a.

[0103] The output terminal 150b functions as a passage for transmitting the AC power converted by the inverter device 10 to the outside. In addition, an electrical signal such as state information on the inverter device 10 may be output from the output terminal 150b.

[0104] The input terminal portion 150a and the output terminal portion 150b are connected to a port 551 to be described later. In one embodiment, the port 551 to be described later may be inserted and connected to the input terminal portion 150a and the output terminal portion 150b.

[0105] The input terminal portion 150a and the output terminal portion 150b of the illustrated embodiment are formed integrally with the housing 100. Alternatively, the input terminal portion 150 and the output terminal portion 150b may be provided separately and combined with the housing 100.

[0106] The housing 100 of the illustrated embodiment is divided into a first device portion 200 and a second device portion 300. Alternatively, the first device portion 200 and the second device portion 300 may also be defined as a space formed inside the housing 100.

[0107] However, in the following description, the first device portion 200 and the second device portion 300 are described assuming that they are three-dimensional structures having an outer shape, for the sake of ease of description and understanding.

[0108] 2) Description of the First Device Unit 200

[0109] The first device portion 200 accommodates the inverter module 240. In the illustrated embodiment, the first device portion 200 is located at a lower side of a second device portion 300 to be described later.

[0110] This is because the inverter module 240 housed in the first device unit 200 is generally heavier than a filter 340 housed in the second device unit 300 described later.

[0111] As the first device part 200 is located at the lower side of the inverter device 10 , the center of gravity moves downward, whereby the inverter device 10 can be stably supported.

[0112] The first device unit 200 and the second device unit 300 described later are physically separated by a partition 400. This will be described in detail later.

[0113] The first device unit 200 includes a first air intake unit 210 a , a first air exhaust unit 220 a , a first air supply unit 230 a , and an inverter module 240 .

[0114] The first air intake portion 210a is a passage that allows external air to flow into the first device portion 200. The first air intake portion 210a may be provided in the form of a penetration hole.

[0115] In the illustrated embodiment, the first air suction portion 210a is formed on the front side of the first device portion 200, but its position may be changed.

[0116] The external air flowing in from the first air intake portion 210 a cools the inverter module 240 accommodated in the first device portion 200 , and then is exhausted from the first exhaust portion 220 a .

[0117] The first exhaust portion 220a is a passage through which external air flowing into the first device unit 200 can be exhausted after exchanging heat with the inverter module 240. The first exhaust portion 220a may be provided in the form of a through hole.

[0118] The first air supply unit 230a provides a conveying force for causing external air to flow into the first device unit 200. The first air supply unit 230a may be provided in a structure capable of guiding the flow of air. In one embodiment, the first air supply unit 230a may be a fan.

[0119] In the illustrated embodiment, the first air supply unit 230a is located adjacent to the first air intake unit 210a, but its position can be changed. As an alternative, the first air supply unit 230a can be located adjacent to the first exhaust unit 220a, or can also be arranged inside the first device unit 200.

[0120] The first air supply unit 230 a may be provided at a position where a conveying force for causing external air to flow into the first device unit 200 can be provided.

[0121] In the illustrated embodiment, the first device part 200 includes a third air intake part 210c, a third exhaust part 220c and a third air supply part 230c. The third air intake part 210c, the third exhaust part 220c and the third air supply part 230c can be located at the lower side of the first air intake part 210a, the first exhaust part 220a and the first air supply part 230a respectively.

[0122] The structures and functions of the third air intake unit 210c, the third air exhaust unit 220c, and the third air supply unit 230c are the same as those of the first air intake unit 210a, the first air exhaust unit 220a, and the first air supply unit 230c described above.

[0123] The inverter module 240 described later generates a large amount of heat. In view of this, it is preferable to additionally provide a third air intake unit 210c, a third air exhaust unit 220c, and a third air supply unit 230c to cool the interior of the first device unit 200 more effectively.

[0124] Therefore, the external air for cooling the first device unit 200 obtains a transfer force through the first air supply unit 230a and the third air supply unit 230c. The external air flows into the first device unit 200 through the first air intake unit 210a and the third air intake unit 210c, cools the inverter module 240 described later, and is discharged through the first exhaust unit 220c and the third exhaust unit 220c.

[0125] An additional power supply unit (not shown) that transmits power for driving the first air supply unit 230a and the third air supply unit 230c may be provided.

[0126] The inverter module 240 is a part that substantially receives direct current and converts it into alternating current.

[0127] The inverter module 240 may include a capacitor 241 , a heat sink 242 , an IGBT (Insulated Gate Bipolar Transistor) 243 , a SMPS (Switching Mode Power Supply) 244 , a fuse, and the like.

[0128] Since the process of the inverter module 240 converting direct current into alternating current is a well-known technology, a detailed description thereof is omitted.

[0129] The inverter module 240 receives direct current power from a main bus bar 550 described later through the input terminal portion 150a. In addition, the alternating current power converted by the inverter module 240 is transmitted to the main bus bar 550 described later through the output terminal portion 150b.

[0130] In addition, the AC power converted by the inverter module 240 may also be transmitted to the filter 340 described later to remove noise. To this end, an electrical unit (not shown) may be provided to connect the inverter module 240 and the filter 340 described later so that electricity can flow.

[0131] 3) Description of the Second Device Unit 300

[0132] The second device part 300 accommodates the filter 340. In the illustrated embodiment, the second device part 300 is located on the upper side of the first device part 200.

[0133] This is because, as described above, the filter 340 accommodated in the second device unit 300 is lighter than the inverter module 240 accommodated in the first device unit 200 .

[0134] The second device section 300 and the first device section 200 are physically separated by the partition section 400. This will be described later.

[0135] The second device unit 300 includes a second air intake unit 310 , a second air exhaust unit 320 , a second air supply unit 330 , and a filter 340 .

[0136] The second air intake portion 310 is a passage that allows external air to flow into the second device portion 300. The second air intake portion 310 may be provided in the form of a through hole.

[0137] In the illustrated embodiment, the second air suction unit 310 is formed on the front side of the second device unit 300, but its position may be changed.

[0138] The external air flowing into the second air intake unit 310 cools the filter 340 accommodated in the second device unit 300 and is then exhausted from the second exhaust unit 320 .

[0139] The second exhaust portion 320 is a passage through which the external air flowing into the second device portion 300 can be exhausted after heat exchange with the filter 340. The second exhaust portion 320 may be provided in the form of a through hole.

[0140] The second air supply unit 330 provides a conveying force for causing external air to flow into the second device unit 300. The second air supply unit 330 may be provided in a structure capable of guiding the flow of air. In one embodiment, the second air supply unit 330 may be a fan.

[0141] In the illustrated embodiment, the second air supply unit 330 is located adjacent to the second exhaust unit 320 , but its position may be changed. Alternatively, the second air supply unit 330 may be located adjacent to the second exhaust unit 320 , or may be disposed inside the second device unit 300 .

[0142] The second air supply unit 330 may be provided at a position where a conveying force for causing external air to flow into the second device unit 300 can be provided.

[0143] In the illustrated embodiment, the second device unit 300 has no additional structure for the inflow of external air except the second air intake unit 310 , the second air exhaust unit 320 , and the second air supply unit 330 .

[0144] This is because, as described above, the heat generated by the filter 340 accommodated in the second device unit 300 is relatively small compared to the heat generated by the inverter module 240 accommodated in the first device unit 200 .

[0145] Alternatively, an additional structure for the inflow of external air may be provided in the second device portion 300. Preferably, whether to provide the additional structure for the inflow of external air is determined in consideration of the overall size of the inverter device 10, the connection relationship with the inverter panel 500 described later, and the like.

[0146] External air for cooling the second device unit 300 is conveyed by the second air supply unit 330 . The external air flows into the second device unit 300 through the second air intake unit 310 , cools the filter 340 , and is discharged through the second exhaust unit 320 .

[0147] A power supply unit (not shown) for transmitting power for driving the second air supply unit 330 may be separately provided.

[0148] The filter 340 is a part for performing filtering to remove noise of the alternating current converted by the inverter module 240 .

[0149] Since the process of filtering the AC power by the filter 340 is a well-known technology, a detailed description thereof is omitted.

[0150] The filter 340 receives direct current power from a main bus bar 550 described later through an input terminal portion 150a. In addition, the alternating current power filtered by the filter 340 is transmitted to the main bus bar 550 through an output terminal portion 150b.

[0151] In order for the filter 340 to receive the AC power converted by the inverter module 240 , an electrical unit (not shown) capable of connecting the inverter module 240 and the filter 340 to be energized may be provided.

[0152] The operation and operation speed of the first air supply unit 230a, the second air supply unit 330 and the third air supply unit 230c can be controlled independently of each other.

[0153] 4) Description of the partition 400

[0154] The partition part 400 partitions the first device part 200 and the second device part 300. Specifically, the first device part 200 and the second device part 300 are physically separated by the partition part 400.

[0155] This is to prevent external air flowing into the first device unit 200 and the second device unit 300 from mixing with each other, as described later.

[0156] Specifically, as described above, the heat generated by the inverter module 240 housed in the first device unit 200 is greater than the heat generated by the filter 340 housed in the second device unit 300 .

[0157] At this time, in the absence of the partition 400, the external air flowing into the first device part 200 and the external air flowing into the second device part 300 may mix. In this case, there is a hidden danger that the air of the first device part 200 with high heat flows into the second device part 300, causing the filter 340 to be damaged due to the high temperature.

[0158] In addition, the air after cooling the filter 340 in the second device unit 300 may flow into the first device unit 200. Since the temperature of the air is obviously higher than the temperature of the outside air, there is a risk that the cooling efficiency of the inverter module 240 is reduced.

[0159] Therefore, the partition part 400 prevents external gases flowing into the respective device parts 200 , 300 from being mixed with each other by physically separating the first device part 200 and the second device part 300 .

[0160] The partition 400 may be formed of a material having low thermal conductivity.

[0161] The position of the partition 400 can be changed according to the size of the first device part 200 and the second device part 300. As an example, when the size of the first device part 200 is smaller than that of the embodiment shown in the figure, the position of the partition 400 can be moved downward along the boundary between the first device part 200 and the second device part 300.

[0162] (2) Description of the inverter panel 500

[0163] The inverter panel 500 of the embodiment of the present invention can accommodate the inverter device 10. In addition, the power conversion device 1 can be configured by connecting a plurality of inverter panels 500 to each other so as to be energized.

[0164] Next, refer to Figures 3 to 6 and Figure 12 to Figure 14 , the inverter panel 500 according to the embodiment of the present invention is described in detail.

[0165] The inverter panel 500 accommodates the inverter device 10. In the illustrated embodiment, each inverter panel 500 accommodates the inverter device 10 on the upper side and the lower side, respectively. That is, one inverter panel 500 can accommodate two inverter devices 10.

[0166] The number of inverter devices 10 that can be accommodated in each inverter panel 500 may be changed.

[0167] In the illustrated embodiment, the inverter device 10 is long and upright in the upper and lower directions and is accommodated in the inverter panel 500. Alternatively, the inverter device 10 may be long and horizontal in the left and right directions and is accommodated in the inverter panel 500.

[0168] In addition, an openable and closable door (not shown) may be provided on the front side of the inverter panel 500. Therefore, the front side of the inverter panel 500 is usually closed, and when the inverter device 10 needs to be inserted or separated, the front side of the inverter panel 500 can be opened by operating the door (not shown).

[0169] The inverter panel 500 includes a first inverter receiving portion 510 , a second inverter receiving portion 520 , and a main bus bar 550 .

[0170] The first inverter housing portion 510 is a space for housing the inverter device 10. In the illustrated embodiment, the first inverter housing portion 510 is formed by a space located on an upper side of the inverter panel 500.

[0171] An opening is formed on the front side of the first inverter housing portion 510 , and the inverter device 10 can be housed inside the first inverter housing portion 510 through the opening.

[0172] A first panel air intake portion 511 is formed on the front side of the first inverter housing portion 510 .

[0173] The first panel air intake portion 511 is a passage that allows external air to flow into the first inverter housing portion 510. The first panel air intake portion 511 may be provided in the form of a through hole.

[0174] The first panel exhaust portion 512 is a passage that can exhaust external air that has flowed into the first inverter housing portion 510 to the outside of the first inverter housing portion 510. The first panel exhaust portion 512 may be provided in the form of a through hole.

[0175] As described above, the inverter device 10 accommodated in the first inverter accommodation portion 510 has a structure for allowing outside air to flow in and out. In addition, the first inverter accommodation portion 510 also has a structure for allowing outside air to flow in and out.

[0176] That is, the external air may cool the inverter device 10 through the first panel air intake portion 511 , the first to third air intake portions 210 a to 230 a , the first to third air exhaust portions 210 c to 230 c , and the first panel air exhaust portion 512 in sequence.

[0177] The flow process of the external gas will be described in detail later.

[0178] The second inverter housing portion 520 is a space for housing the inverter device 10. In the illustrated embodiment, the second inverter housing portion 520 is formed by a space located at a lower side of the inverter panel 500.

[0179] An opening is formed on the front side of the second inverter housing portion 520 , and the inverter device 10 is housed inside the second inverter housing portion 520 through the opening.

[0180] A second panel air intake portion 521 is formed on the front side of the second inverter housing portion 520 .

[0181] The second panel air intake portion 521 is a passage that allows external air to flow into the second inverter housing portion 520. The second panel air intake portion 521 may be provided in the form of a through hole.

[0182] The second panel exhaust portion 522 is a passage that can exhaust external air that has flowed into the second inverter housing portion 520 to the outside of the second inverter housing portion 520. The second panel exhaust portion 522 may be provided in the form of a through hole.

[0183] The structure of the second inverter housing portion 520 that allows the flow of external air and the exhaust of external air forms a flow path for external air after the inverter device 10 is housed.

[0184] That is, the external air may cool the inverter device 10 through the second panel air intake portion 521 , the first to third air intake portions 210 a to 230 a , the first to third air exhaust portions 210 c to 230 c , and the second panel air exhaust portion 522 in sequence.

[0185] The flow process of the external gas will be described in detail later.

[0186] The main bus bar 550 receives direct current power from the outside and supplies it to the inverter device 10 , and receives alternating current power converted by the inverter device 10 and transmits it to an external load.

[0187] In the illustrated embodiment, the main bus bar 550 is located toward the rear side of the inverter panel 500 , but the position of the main bus bar 550 may be changed.

[0188] However, it does not matter where it is located as long as it can be electrically connected to the inverter device 10 accommodated in the inverter panel 500 .

[0189] The main bus bar 550 is electrically connected to the power input panel 610 of the power panel 600. Therefore, the main bus bar 550 can receive direct current from the power input panel 610.

[0190] In addition, the main bus bar 550 is electrically connected to the power output panel 620 of the power panel 600. Therefore, the main bus bar 550 can transmit the AC power received from the inverter device 10 to the external load.

[0191] The main bus bar 550 of each inverter panel 500 may be electrically connectable with the main bus bars 550 of other inverter panels 500 .

[0192] That is, in the illustrated embodiment, the plurality of inverter panels 500 are arranged in a row and the left and right sides of the plurality of inverter panels 500 are in contact with each other. At this time, the main bus bars 550 of the respective inverter panels 500 may be electrically connected to each other.

[0193] Therefore, the power conversion capacity of the power conversion device 1 can be changed simply by changing the number of inverter panels 500 provided in the power conversion device 1 .

[0194] That is, the inverter device 10 having a predetermined power conversion capacity is accommodated in each inverter panel 500. When a plurality of such inverter panels 500 are provided, the power conversion capacity of the entire power conversion device 1 is increased.

[0195] As an alternative, the main bus bar 550 may not be provided in each inverter panel 500 , but may be provided separately and each inverter panel 500 may be electrically connected to the main bus bar 550 .

[0196] In the illustrated embodiment, the main bus bar 550 is composed of a first main bus bar 550a and a second main bus bar 550b (see Fig.13 and Fig.14 ).

[0197] This is because the inverter panel 500 is provided with the first inverter accommodation part 510 on the upper side and the second inverter accommodation part 520 on the lower side.

[0198] That is, the first main bus bar 550a is electrically connected to the inverter device 10 accommodated in the first inverter accommodation portion 510. In addition, the second main bus bar 550b is electrically connected to the inverter device 10 accommodated in the second inverter accommodation portion 520.

[0199] As an alternative, a single main bus bar 550 may be provided. That is, a single main bus bar 550 may be electrically connected to both of the inverter devices 10 accommodated in the first inverter accommodation portion 510 and the second inverter accommodation portion 520 .

[0200] The main bus bar 550 includes a port 551 .

[0201] The port 551 is a unit for electrically connecting the main bus bar 550 and the inverter device 10. Specifically, the main bus bar 550 is electrically connected to the port 551.

[0202] The port 551 is coupled to an input terminal portion 150 a and an output terminal portion 150 b provided in the inverter device 10 , thereby electrically connecting the inverter device 10 and the main bus bar 550 .

[0203] Considering that one effect of the inverter device 10 according to the embodiment of the present invention is that it can be easily accommodated in and separated from the inverter panel 500, it is preferred that the port 551 is detachably combined with the input terminal portion 150a and the output terminal portion 150b.

[0204] The port 551 includes a first port 551 a and a second port 552 b .

[0205] The first port 551a electrically connects the first main bus bar 550a and the inverter device 10. As described above, the inverter device 10 is the inverter device 10 accommodated in the first inverter accommodation portion 510.

[0206] The second port 551 b electrically connects the second main bus bar 550 b and the inverter device 10 . As described above, the inverter device 10 is the inverter device 10 accommodated in the second inverter accommodation portion 520 .

[0207] (3) Description of the indoor inverter panel 500a

[0208] The power conversion device 1 according to an embodiment of the present invention includes an indoor inverter panel 500 a .

[0209] The indoor inverter panel 500a is based on the premise that the power conversion device 1 is installed indoors. In addition, the indoor inverter panel 500a not only accommodates the inverter device 10 inside, but also includes a PCB device 534 described later.

[0210] Therefore, the indoor inverter panel 500 a is different from the above-mentioned inverter panel 500 in that it accommodates a single inverter device 10 and includes a PCB device accommodating portion 530 for accommodating a PCB device 534 .

[0211] Below, refer to Figures 15 to 18 The indoor inverter panel 500a according to the embodiment of the present invention is described in detail.

[0212] The indoor inverter panel 500 a of the illustrated embodiment includes an indoor cover 501 a , an indoor door 502 a , a first inverter receiving portion 510 , a PCB device receiving portion 530 , and a base portion 540 .

[0213] The indoor cover 501a forms the outer side of the indoor inverter panel 500a. In the illustrated embodiment, the indoor cover 501a has a rectangular parallelepiped shape formed long along the upper side and the lower side, but the shape may be changed.

[0214] The indoor door 502a is located at the front side of the indoor housing 501a. The indoor door 502a can be provided in any structure that can open or close the front side of the indoor inverter panel 500a.

[0215] The interior door 502a is formed with a first panel air intake portion 511. Since the structure and function of the first panel air intake portion 511 are the same as those described above, repeated descriptions are omitted.

[0216] A first inverter receiving portion 510 and a PCB device receiving portion 530 are formed at an inner side of the indoor inverter panel 500 a .

[0217] The first inverter housing portion 510 is located at an upper side of the PCB device housing portion 530. Since the structure and function of the first inverter housing portion 510 are the same as those described above, repeated descriptions are omitted.

[0218] The PCB device accommodating portion 530 is located at the lower side of the first inverter accommodating portion 510. A PCB device 534 for controlling the power conversion device 1 is accommodated inside the PCB device accommodating portion 530. The PCB device 534 is electrically connected to the inverter device 10 to control the inverter device 10.

[0219] The PCB device accommodating portion 530 includes an external air inlet portion 531 , an external air outlet portion 532 , a panel air supply portion 533 , and a PCB device 534 .

[0220] In addition, as shown in the figure, a filter 340 may be disposed in the PCB device receiving portion 530 .

[0221] The external air inflow portion 531 is a passage through which external air for cooling the PCB device accommodated in the PCB device accommodating portion 530 flows.

[0222] In the illustrated embodiment, the external air inflow portion 531 is formed as an opening portion at the lower side of the PCB device receiving portion 530. The external air inflow portion 531 is aligned with an external air supply portion 542 of the base portion 540 described later.

[0223] The external gas inlet 531 may be formed at any position that allows external gas to flow into the PCB device receiving portion 530. However, as described later, the external gas inlet 531 is preferably located at a position corresponding to the position of the external gas supply portion 542 described later.

[0224] The external air exhaust portion 532 is a passage through which external air flowing into the PCB device receiving portion 530 can be exhausted after heat exchange with the PCB device 534 .

[0225] In the illustrated embodiment, the external air exhaust portion 532 is formed as an opening at the rear side of the indoor inverter panel 500a. The external air exhaust portion 532 may be formed at any position where the air inside the PCB device accommodating portion 530 can be exhausted to the outside of the PCB device accommodating portion 530.

[0226] The external air exhaust portion 532 is provided with a panel air supply portion 533 .

[0227] The panel air supply unit 533 provides a conveying force for causing external air to flow into the interior of the indoor inverter panel 500a. The panel air supply unit 533 may be provided in a structure capable of guiding the flow of air. In one embodiment, the panel air supply unit 533 may be a fan.

[0228] In the illustrated embodiment, the panel air supply portion 533 is located adjacent to the external air discharge portion 532, but its position can be changed. As an alternative, the panel air supply portion 533 can be located adjacent to the external air inlet portion 531, or can also be arranged inside the PCB device accommodating portion 530.

[0229] The panel air supply portion 533 may be disposed at a position that can provide a conveying force for allowing external air to flow into the PCB device accommodating portion 530 .

[0230] The base 540 is located at the lower side of the indoor cover 501a of the indoor inverter panel 500a. The base 540 separates the indoor inverter panel 500a from the ground by a predetermined distance. In addition, the base 540 forms a passage for the inflow of external air for cooling the PCB device receiving portion 530.

[0231] Preferably, the shape of the base portion 540 corresponds to the shape of the indoor cover 501a.

[0232] The base portion 540 includes a first base suction portion 541 a , a second base suction portion 541 b , and an external gas supply portion 542 .

[0233] The first base air intake portion 541a is formed on the front side of the base portion 540. The first base air intake portion 541a forms a passage that allows external air to flow into the inside of the base portion 540. The first base air intake portion 541a may be formed in the form of a through hole.

[0234] In the illustrated embodiment, the first base suction portions 541 a are formed at the front left side and the front right side of the base portion 540 , respectively, but the positions and numbers thereof may be changed.

[0235] The second base air intake portion 541b is formed at the rear side of the base portion 540. The second base air intake portion 541b forms a passage that allows external air to flow into the inside of the base portion 540. The second base air intake portion 541b may be formed in the form of a through hole.

[0236] In the illustrated embodiment, the second base suction portions 541 b are respectively formed on the rear left side and the rear right side of the base portion 540 , but the positions and numbers thereof may be changed.

[0237] The external gas supply part 542 is a passage through which the external gas flowing into the base part 540 leaves the base part 540 to flow into the PCB device receiving part 530. The external gas supply part 542 may be formed with an opening part.

[0238] The external gas supply part 542 and the external gas inlet 531 of the PCB device receiving part 530 are aligned with each other. That is, the external gas exhausted from the external gas supply part 542 flows into the inside of the PCB device receiving part 530 through the external gas inlet 531 without leaking to other parts.

[0239] At this time, the conveying force for the external air flow may be generated naturally, or may be provided by the panel air supply unit 533 .

[0240] The flow of the external air in the indoor inverter panel 500a will be described in detail later.

[0241] In addition, although not shown, the indoor inverter panel 500a may be provided with the above-mentioned main bus bar 550. Similar to the above content, the main bus bar 550 may be electrically connected to the inverter device 10, the PCB device 534, and the filter 340.

[0242] (4) Description of the outdoor inverter panel 500b

[0243] The power conversion device 1 according to an embodiment of the present invention includes an outdoor inverter panel 500b.

[0244] The outdoor inverter panel 500b is based on the premise that the power conversion device 1 is installed outdoors. In addition, the outdoor inverter panel 500b not only accommodates the inverter device 10 inside, but also includes a PCB device 534.

[0245] Therefore, the outdoor inverter panel 500 b is different from the above-mentioned inverter panel 500 in that it accommodates a single inverter device 10 and includes a PCB device accommodating portion 530 for accommodating a PCB device 534 .

[0246] Below, refer to Figures 19 to 22 The outdoor inverter panel 500b according to the embodiment of the present invention is described in detail.

[0247] The outdoor inverter panel 500 a of the illustrated embodiment includes an outdoor cover 501 b , an outdoor door 502 b , a first inverter accommodating portion 510 , a PCB device accommodating portion 530 , and a base portion 540 .

[0248] The outdoor cover 501b forms the outer side of the outdoor inverter panel 500a. In the illustrated embodiment, the outdoor cover 501b has a rectangular parallelepiped shape formed long along the upper side and the lower side, but the shape may be changed.

[0249] A top plate is provided on the upper side of the outdoor housing 501b. Therefore, even if the outdoor inverter panel 500b is installed outdoors, it is possible to prevent rainwater, snow, etc. from flowing into the interior of the outdoor housing 501b.

[0250] The outdoor door 502b is located on the front side of the outdoor housing 501b. The outdoor door 502b may be provided in any structure capable of opening or closing the front side of the outdoor inverter panel 500a.

[0251] The exterior door 502b is provided with a first panel air intake portion 511. The structure and function of the first panel air intake portion 511 are the same as those described above, and therefore, repeated descriptions are omitted.

[0252] A first inverter receiving portion 510 and a PCB device receiving portion 530 are formed at an inner side of the outdoor inverter panel 500 a .

[0253] The structures and functions of the first inverter housing portion 510, the PCB device housing portion 530, and the base portion 540 are the same as those of the indoor inverter panel 500b described above, and therefore repeated descriptions are omitted.

[0254] (5) Description of the power panel 600

[0255] The power conversion device 1 according to the embodiment of the present invention includes a power panel 600 for receiving power from the outside and transmitting power to the outside.

[0256] Below, refer to Figure 3 and Figure 4 , Figure 23 to Figure 25 The power panel 600 of the illustrated embodiment will be described in detail.

[0257] The power panel 600 is located adjacent to the inverter panel 500. In addition, the power panel 600 and the inverter panel 500 are electrically connected.

[0258] The power panel 600 receives direct current power from the outside and transmits it to the inverter panel 500. The direct current power transmitted to the inverter panel 500 is transmitted to the inverter device 10 and converted into alternating current power.

[0259] In addition, the power panel 600 receives the AC power converted by the inverter device 10 from the inverter panel 500. The AC power transmitted to the power panel 600 is transmitted to an external load.

[0260] The power panel 600 includes a power input panel 610 and a power output panel 620 .

[0261] The power input panel 610 receives direct current from the outside. To this end, the power input panel 610 can be electrically connected to the outside.

[0262] The power input panel 610 includes a power input terminal portion 611 .

[0263] The power input terminal portion 611 is a passage connecting the power input panel 610 and an external power source. The power input terminal portion 611 is electrically connected to the external power source via an input lead cable (not shown).

[0264] The DC power received by the power input panel 610 is transmitted to the inverter device 10 through the main bus bar 550 of the inverter panel 500. For this purpose, a power supply unit (not shown) that connects the power input terminal portion 611 and the main bus bar 550 to enable power supply may be provided.

[0265] Preferably, the number of the power input terminal parts 611 corresponds to the number of the input power conversion lines 711. For example, in the case of direct current, two input power conversion lines 711 may be provided, and accordingly, the number of the power input terminal parts 611 is also provided to be two.

[0266] In the illustrated embodiment, the power input panel 610 is located on the right side of the plurality of inverter panels 500. The position of the power input panel 610 may be changed.

[0267] A vent (not shown) is formed on the front side of the power input panel 610 , through which external air for cooling the inside of the power input panel 610 can flow in.

[0268] In addition, an operation unit (not shown) such as a switch is provided on the front side surface of the power input panel 610 , and a control signal for the operation of the power conversion device 1 can be applied by this operation unit.

[0269] An input line conversion panel 710 described later may be provided on the other side of the power input panel 610 opposite to the side adjacent to the inverter panel 500, that is, on the right side of the illustrated embodiment. This will be described later.

[0270] The power output panel 620 transmits AC power to the outside. To this end, the power output panel 620 can be electrically connected to the outside.

[0271] The power output panel 620 includes a power output terminal portion 621 .

[0272] The power output terminal portion 621 is a passage connecting the power output panel 620 and an external load. The power output terminal portion 621 is electrically connected to an external power source through an output lead cable (not shown).

[0273] The AC power transmitted from the power output panel 620 to the external load is transmitted to the power output panel 620 through the main bus bar 550 of the inverter panel 500. For this purpose, a power supply unit (not shown) that electrically connects the power output terminal portion 621 and the main bus bar 550 may be provided.

[0274] Preferably, the number of power output terminal parts 621 corresponds to the number of output power conversion lines 721. For example, in the case of AC power, three output power conversion lines 721 may be provided, and accordingly, three power output terminal parts 621 are also provided.

[0275] In the illustrated embodiment, the power output panel 620 is located on the left side of the plurality of inverter panels 500. The position of the power output panel 620 may be changed.

[0276] A vent (not shown) is formed on the front side of the power output panel 620 , through which external air for cooling the inside of the power output panel 620 can flow.

[0277] An output line conversion panel 720 described later may be provided on the other side of the power output panel 620 opposite to the side adjacent to the inverter panel 500, that is, on the left side of the illustrated embodiment. This will be described later.

[0278] (6) Description of the line conversion panel 700

[0279] The power conversion device 1 according to the embodiment of the present invention includes a line conversion panel 700 for changing an input path of direct current and an output path of alternating current.

[0280] The line conversion panel 700 is located adjacent to the power panel 600 and is electrically connected to the power panel 600. The line conversion panel 700 can be used as a module and combined with the power panel 600 in an add-on manner.

[0281] Below, refer to Figure 23 to Figure 26 The line conversion panel 700 of the illustrated embodiment will be described in detail.

[0282] The line conversion panel 700 changes a path for transmitting or receiving power to or from the power panel 600 .

[0283] The line conversion panel 700 receives direct current from the outside and transmits it to the power supply panel 600. In addition, the line conversion panel 700 receives alternating current from the power supply panel 600 and transmits it to an external load.

[0284] The line conversion panel 700 includes an input line conversion panel 710 and an output line conversion panel 720 .

[0285] The input line conversion panel 710 receives direct current power from the outside and transfers the received direct current power to the power input panel 610 .

[0286] The input line conversion panel 710 is located adjacent to the power input panel 610. In addition, the input line conversion panel 710 and the power input panel 610 are electrically connected.

[0287] In the illustrated embodiment, the input line conversion panel 710 is located adjacent to the right side of the power input panel 610, but its position can be changed. However, regardless of where the input line conversion panel 710 is located, it is preferred that the input line conversion panel 710 is located adjacent to the power input panel 610.

[0288] The input circuit conversion panel 710 includes an input power conversion circuit 711 , an input opening portion 712 , and an input circuit terminal portion 713 .

[0289] The input power conversion line 711 electrically connects an input line terminal portion 713 to be described later and a power input terminal portion 611 of the power input panel 610 .

[0290] The shape of the input power conversion line 711 can be changed. Specifically, the shape of the input power conversion line 711 can be changed according to the position of the input line terminal 713 described later, the position of the power input terminal 611 , and the structure inside the input line conversion panel 710 .

[0291] Therefore, the position of the input line terminal portion 713 and the position of the power input terminal portion 611 described later can be freely determined by the input power conversion line 711 .

[0292] The input opening 712 is a passage that allows an external input lead cable (not shown) to be connected to an input line terminal 713 to be described later.

[0293] In the illustrated embodiment, the input openings 712 are formed on the upper side, right side, and rear side of the input circuit conversion panel 710. In addition, on the right side of the input circuit conversion panel 710, the input openings 712 are formed on the upper side and the lower side.

[0294] That is, the input opening portion 712 may be formed on a side of the input line conversion panel 710 that is not adjacent to the power input panel 610 .

[0295] This is to increase the degree of freedom in selecting the position of the input line terminal 713 described later. That is, as the position of the input opening 712 is diversified, the position of the input line terminal 713 for the power conversion device 1 to receive DC power from the outside can be set differently.

[0296] The input opening 712 to which the input lead cable (not shown) is not connected may be provided with a cover (not shown) to prevent foreign matter from entering.

[0297] The input line terminal 713 is a channel for receiving direct current from the outside (see Fig.30 The input line terminal portion 713 is connected to an external power source via a wire input cable (not shown).

[0298] In one embodiment, the input line terminal portion 713 and the wire input cable (not shown) may be threadedly coupled. In this case, the input line terminal portion 713 and the wire input cable (not shown) may be securely fastened.

[0299] The input line terminal portion 713 may be provided in a plurality. Specifically, the input line terminal portion 713 may be provided in each of the plurality of input opening portions 712. As an alternative, the input line terminal portion 713 may be provided in any one of the plurality of input opening portions 712. In such an embodiment, the path for receiving direct current may be diversified. Therefore, the convenience of the user may be improved.

[0300] The output line conversion panel 720 receives direct current power from the outside and transmits the received direct current power to the power output panel 620 .

[0301] The output line conversion panel 720 is located adjacent to the power output panel 620. In addition, the output line conversion panel 720 and the power output panel 620 are electrically connected.

[0302] In the illustrated embodiment, the output line conversion panel 720 is located adjacent to the left side of the power output panel 620, but its position can be changed. However, no matter where the output line conversion panel 720 is located, it is preferred that the output line conversion panel 720 is located adjacent to the power output panel 620.

[0303] The output circuit conversion panel 720 includes an output power conversion circuit 721 , an output opening portion 722 , and an output circuit terminal portion 723 .

[0304] The output power conversion line 721 electrically connects an output line terminal portion 723 to be described later and a power output terminal portion 621 of the power output panel 620 .

[0305] The shape of the output power conversion circuit 721 can be changed. Specifically, the shape of the output power conversion circuit 721 can be changed according to the position of the output circuit terminal portion 723 described later, the position of the power output terminal portion 621 and the structure inside the output circuit conversion panel 720.

[0306] Therefore, the position of the output line terminal portion 723 and the position of the power output terminal portion 621 described later can be freely determined by the output power conversion line 721 .

[0307] The output opening 722 is a passage that allows an external output lead cable (not shown) to be connected to an output line terminal 723 to be described later.

[0308] In the illustrated embodiment, the output openings 722 are formed on the upper side, the left side, and the rear side of the output line conversion panel 720. In addition, the output openings 722 are formed on the upper side and the lower side on the left side of the output line conversion panel 720. That is, the output openings 722 can be formed on the side of the output line conversion panel 720 that is not adjacent to the power output panel 620.

[0309] This is to increase the degree of freedom in selecting the position of the output line terminal portion 723 described later. That is, as the position of the output opening portion 722 is diversified, the position of the output line terminal portion 723 for transmitting AC power from the power conversion device 1 to an external load can be set differently.

[0310] The output opening 722 to which the output lead cable (not shown) is not connected may be provided with a cover (not shown) to prevent foreign matter from entering.

[0311] The output line terminal 723 is a channel for transmitting AC power to an external load (see Fig.30 The output line terminal portion 723 is connected to an external power source via a wire output cable (not shown).

[0312] In one embodiment, the output line terminal portion 723 and the wire output cable (not shown) may be threadedly coupled. In this case, the output line terminal portion 723 and the wire output cable (not shown) may be securely fastened.

[0313] The output line terminal portion 723 may be provided in a plurality. Specifically, the output line terminal portion 723 may be provided in each of the plurality of output opening portions 722. As an alternative, the output line terminal portion 723 may be provided in any one or more of the plurality of output opening portions 722. In such an embodiment, the paths for transmitting alternating current may be diversified. Therefore, the convenience of the user may be improved.

[0314] 2. Description of the air flow process of the inverter device 10 according to the embodiment of the present invention

[0315] In the inverter device 10 of the embodiment of the present invention, external air may flow into the first device unit 200 and the second device unit 300. The inflowing external air may cool the inverter module 240 of the first device unit 200 and the filter 340 of the second device unit 300 and then be exhausted.

[0316] Below, refer to Fig. 27 The air flow process in the inverter device 10 according to the embodiment of the present invention is described in detail.

[0317] First, the air flow process in the first device section 200 will be described.

[0318] When the first air supply unit 230a and the third air supply unit 230c operate, external air flows into the first device unit 200 through the first air intake unit 210a and the third air intake unit 210c. At this time, as described above, the first air supply unit 230a and the third air supply unit 230c provide a transfer force for the flow of external air.

[0319] In addition, even if the first air supply unit 230 a and the third air supply unit 230 c are not in operation, external air can flow into the first device unit 200 due to natural forces such as wind.

[0320] Through the operation of the first air supply unit 230a and the third air supply unit 230c, external air continuously flows into the first device unit 200. Therefore, the external air flowing into the first device unit 200 is pushed by the subsequent external air and flows to the rear side of the first device unit 200.

[0321] At this time, the inverter module 240 is located between the first air intake part 210a and the first air exhaust part 220a and the third air intake part 210c and the third air exhaust part 220c. Therefore, the inverter module 240 is cooled by heat exchange between the external air and the inverter module 240.

[0322] Through the above process, after the external air flowing inside the first device unit 200 reaches the rear side of the first device unit 200, it is exhausted from the first device unit 200 through the first exhaust unit 220a and the third exhaust unit 220c.

[0323] Next, the flow process of air in the second device section 300 will be described.

[0324] When the second air supply unit 330 is operated, the external air flows into the second device unit 300 through the second air intake unit 310. At this time, as described above, the second air supply unit 330 provides a transfer force for the flow of the external air.

[0325] In addition, even if the second air supply unit 330 is not in operation, external air can flow into the second device unit 300 by natural forces such as wind.

[0326] The second air supply unit 330 operates to continuously flow external air into the second device unit 300. Therefore, the external air flowing into the second device unit 300 is pushed by the subsequent external air and flows toward the rear side of the second device unit 300.

[0327] At this time, the filter 340 is located between the second air intake unit 310 and the second air exhaust unit 320. Therefore, the filter 340 is cooled by heat exchange between the external air and the filter 340.

[0328] Through the above process, the external air flowing inside the second device section 300 reaches the rear side of the second device section 300 and is then exhausted from the second device section 300 through the second exhaust section 320 .

[0329] At this time, as described above, the operation and operation speed of the first air supply unit 230a, the second air supply unit 330, and the third air supply unit 230c can be independently controlled.

[0330] As described above, the first device portion 200 and the second device portion 300 are physically separated by the partition portion 400 .

[0331] Therefore, the external air flowing inside the first device section 200 and the external air flowing inside the second device section 300 are not mixed.

[0332] Therefore, the inverter module 240 and the filter 340 are effectively cooled without affecting each other.

[0333] Since the heat generated by the inverter module 240 is higher than that of the filter 340 , the third air intake unit 210 c , the third air exhaust unit 220 c , and the third air supply unit 230 c are additionally provided in the first device unit 200 as described above.

[0334] 3.1. Description of the air flow process of the inverter panel 500 according to the embodiment of the present invention

[0335] In the inverter panel 500 of the embodiment of the present invention, external air for cooling the inverter device 10 accommodated therein may flow in. The inflowing external air may cool the inverter module 240 and the filter 340 provided in the inverter device 10 and then be exhausted.

[0336] Below, refer to Fig.28 The air flow process of the inverter panel 500 according to the embodiment of the present invention is described in detail.

[0337] As described above, the first inverter accommodating portion 510 and the second inverter accommodating portion 520 are provided with the first panel suction portion 511 and the second panel suction portion 521, respectively.

[0338] When the inverter device 10 accommodated in the first inverter accommodation portion 510 is operated, the first air blowing portion 230a, the second air blowing portion 330, and the third air blowing portion 230c provided in the inverter device 10 are operated.

[0339] The first air supply unit 230a, the second air supply unit 330, and the third air supply unit 230c provide a transfer force for causing external air to flow into the inverter panel 500. Thus, external air flows into the inverter panel 500 through the first panel air intake unit 511 and the second panel air intake unit 521.

[0340] The external air flowing into the inverter panel 500 is still receiving the transfer force provided by the first air supply unit 230a, the second air supply unit 330 and the third air supply unit 230c. Therefore, the external air flows toward the first device unit 200 and the second device unit 300 of the inverter device 10.

[0341] The process in which the external air flows into the inverter device 10 and then is exhausted is the same as that described above.

[0342] The external air exhausted from the inverter device 10 is still receiving the transfer force provided by the first air supply unit 230 a , the second air supply unit 330 , and the third air supply unit 230 c . Therefore, the external air moves to the rear side of the inverter panel 500 .

[0343] As described above, the first panel exhaust part 512 and the second panel exhaust part 522 are formed at the rear side of the inverter panel 500. Therefore, external air is exhausted to the outside of the inverter panel 500 through the first panel exhaust part 512 and the second panel exhaust part 522.

[0344] In summary, an external air inlet and outlet flow path including each panel air intake portion 511, 521, each air intake portion 210a, 310, 210c, the inverter device 10, each exhaust portion 220a, 320, 220c and each panel exhaust portion 512, 522 is formed.

[0345] 3.2. Air flow of the indoor inverter panel 500a and the outdoor inverter panel 500b according to the embodiment of the present invention Description of the process

[0346] In the indoor inverter panel 500 a and the outdoor inverter panel 500 b of the embodiment of the present invention, external air for cooling the inverter device 10 and the PCB device 534 accommodated therein may flow in.

[0347] The inflowing external air may cool the inverter module 240 , the filter 340 , and the PCB device 534 provided in the inverter device 10 and then be discharged.

[0348] Below, refer to Fig.29 The air flow process of the indoor inverter panel 500a and the outdoor inverter panel 500b according to the embodiment of the present invention is described in detail.

[0349] Since the flow process of the external air in the first inverter housing part 510 is the same as the above, the repeated description is omitted.

[0350] Next, the flow process of air in the PCB device receiving portion 530 will be described.

[0351] As described above, the PCB device receiving portion 530 includes the external air inlet portion 531 , the external air outlet portion 532 , and the panel air supply portion 533 . In addition, the base portion 540 is located at the lower side of the PCB device receiving portion 530 .

[0352] If power is applied to the PCB device 534, the panel air supply unit 533 operates. Alternatively, the panel air supply unit 533 may also operate when power is applied to the indoor inverter panel 500a and the outdoor inverter panel 500b.

[0353] As the panel air supply unit 533 operates, the external air is supplied with a transfer force for moving toward the first base air suction unit 541 a and the second base air suction unit 541 b of the base unit 540 .

[0354] This is because the external gas inflow portion 531 of the PCB device accommodating portion 530 and the external gas supply portion 542 of the base portion 540 are aligned with each other to communicate with each other.

[0355] The external air flowing into the base portion 540 through the first base suction portion 541a and the second base suction portion 541b passes through the external air supply portion 542. At this time, the external air not only obtains a transfer force to move toward the PCB device accommodating portion 530 through the panel air supply portion 533, but is also pushed by the external air flowing into the base portion 540 later.

[0356] External air flows into the inside of the PCB device accommodating portion 530 through the external air inflow portion 531 of the PCB device accommodating portion 530 .

[0357] The external air flowing into the PCB device receiving portion 530 is still receiving the transfer force provided by the panel air supply portion 533. Therefore, the external air moves toward the panel air supply portion 533 located at the rear side of the PCB device receiving portion 530.

[0358] At this time, the external air moves toward the panel air supply portion 533 and exchanges heat with the PCB device 534 or the filter 340 , thereby cooling the PCB device 534 or the filter 340 .

[0359] As described above, the external air exhaust portion 532 is formed at the rear side of the PCB device receiving portion 530. Therefore, the external air is exhausted to the outside of the indoor inverter panel 500a and the outdoor inverter panel 500b through the external air exhaust portion 532.

[0360] In summary, an external gas inflow and exhaust flow path including the base suction parts 541 a and 541 b , the external gas supply part 542 , the external gas inflow part 531 , the PCB device accommodating part 530 , and the external gas exhaust part 532 is formed.

[0361] 4. Regarding the form of changing the path of the input power supply and the output power supply of the power conversion device 1 according to the embodiment of the present invention Description

[0362] The power conversion device 1 according to the embodiment of the present invention includes a line conversion panel 700. As described above, the line conversion panel 700 can change the transmission position of direct current and the transmission position of alternating current.

[0363] Below, refer to Fig.30 The following describes in detail how the power input and output paths of the power conversion device 1 according to the embodiment of the present invention are changed.

[0364] As described above, the line conversion panel 700 may be located adjacent to the power panel 600 .

[0365] Specifically, the input line conversion panel 710 is located at one side of the power input panel 610, and in the illustrated embodiment, is located adjacent to the right side of the power input panel 610. In addition, the output line conversion panel 720 is located at one side of the power output panel 620, and in the illustrated embodiment, is located adjacent to the left side of the power output panel 620.

[0366] An inverter panel space S is formed between the power input panel 610 and the power output panel 620 , whereby the inverter panel 500 can be coupled.

[0367] The power input terminal portion 611 provided on one side of the power input panel 610 may be electrically connected to one side of an input power conversion line 711 provided on the input line conversion panel 710 .

[0368] In addition, the other side of the input power conversion line 711 is electrically connected to the input line terminal portion 713 .

[0369] At this time, the input line terminal portion 713 may be provided at a position where the input opening portion 712 is formed.

[0370] As described above, the input opening 712 may be located on the right side, upper side, or rear side of the input line conversion panel 710 . Therefore, the input line terminal 713 may also be located on the right side, upper side, or rear side of the input line conversion panel 710 .

[0371] The input line terminal 713 is electrically connected to an external input wire cable (not shown), so that external direct current is transmitted to the power input panel 610 via the input wire cable (not shown), the input line terminal 713, the input power conversion circuit 711 and the power input terminal 611.

[0372] The power output terminal portion 621 provided on one side of the power output panel 620 is electrically connected to one side of the output power conversion line 721 provided on the output line conversion panel 720 .

[0373] In addition, the other side of the output power conversion line 721 is electrically connected to the output line terminal portion 723 .

[0374] At this time, the output line terminal portion 723 may be provided at a position where the output opening portion 722 is formed.

[0375] As described above, the output opening 722 may be located on the left side, upper side, or rear side of the output line conversion panel 720 . Therefore, the output line terminal 723 may also be located on the left side, upper side, or rear side of the output line conversion panel 720 .

[0376] The output line terminal 723 is electrically connected to an external output wire cable (not shown), so that the converted AC power is transmitted to an external load via the power output terminal 621, the output power conversion circuit 721, the output line terminal 723 and the output wire cable (not shown).

[0377] 5. Description of the Effects of the Power Converter 1 of the Present Invention

[0378] The power conversion device 1 of the present invention is provided with modular inverter devices 10. Each inverter device 10 includes an inverter module 240 for converting direct current into alternating current and a filter 340 for filtering the converted alternating current.

[0379] Therefore, the power conversion capacity of the entire power conversion device 1 can be adjusted simply by changing the number of inverter devices 10 .

[0380] In addition, the modularization of the inverter device 10 eliminates the need for a separate space for housing the inverter device and the filter. Therefore, the power conversion device 1 can be miniaturized, and the space for installing the power conversion device 1 can be reduced.

[0381] In addition, external air for cooling the inverter device 10 flows into the first device part 200 accommodating the inverter module 240 and the second device part 300 accommodating the filter 340. In addition, the inflowing external air is not mixed with each other due to the partition part 400.

[0382] Therefore, effective cooling can be performed according to the amount of heat generated by each device unit 200 , 300 .

[0383] The inverter panel 500 housing the inverter device 10 is also provided with panel air intake portions 511, 521 and panel air exhaust portions 512, 522 for the inflow of external air. Therefore, the inverter device 10 housed in the inverter panel 500 can be effectively cooled.

[0384] In addition, the inverter panels 500 can be electrically connected to each other to be scaled up. Therefore, even if the power conversion capacity needs to be changed during use, the power conversion capacity can be changed by simply adding or reducing the inverter panels 500.

[0385] In addition, by providing the line conversion panel 700 in an add-on manner, the input direction of DC power and the output direction of AC power can be set differently. Therefore, the input direction and output direction of the power supply can be set to match the environment in which the power conversion device 1 is installed, thereby improving the convenience of the user.

[0386] The present invention has been described above with reference to the preferred embodiments. However, it will be appreciated by those skilled in the art that various modifications and changes may be made to the present invention without departing from the technical concept described in the claims.

[0387] Description of Reference Numerals

[0388] 1: Power conversion device

[0389] 10: Inverter device

[0390] 100: hood

[0391] 150a: Input terminal

[0392] 150b: Output terminal

[0393] 200: First device

[0394] 210a: First air intake section

[0395] 210c: Third air intake section

[0396] 220a: First exhaust section

[0397] 220c: Third exhaust section

[0398] 230a: First air supply unit

[0399] 230c: The third air supply unit

[0400] 240: Inverter module

[0401] 241: Capacitor

[0402] 242: Heat sink

[0403] 243: IGBT (Insulated Gate Bipolar Transistor)

[0404] 244: SMPS (Switch Mode Power Supply)

[0405] 245: Fuse

[0406] 300: Second device part

[0407] 310: Second air intake section

[0408] 320: Second exhaust section

[0409] 330: Second air supply unit

[0410] 340: filter

[0411] 400: Divider

[0412] 500: Inverter Panel

[0413] 500a: Indoor inverter panel

[0414] 500b: Outdoor inverter panel

[0415] 501a: Indoor enclosure

[0416] 501b: Outdoor cover

[0417] 502a: Interior doors

[0418] 502b: Outdoor door

[0419] 510: First inverter housing

[0420] 511: First panel air intake unit

[0421] 512: First panel exhaust part

[0422] 520: Second inverter accommodation portion

[0423] 521: Second panel air intake part

[0424] 522: Second panel exhaust

[0425] 530: PCB device accommodation part

[0426] 531: External air inflow part

[0427] 532: External gas exhaust part

[0428] 533: Panel air supply unit

[0429] 534: PCB device

[0430] 540: Base

[0431] 541a: First base suction part

[0432] 541b: Second base suction part

[0433] 542: External gas supply unit

[0434] 550: Main bus

[0435] 550a: First main bus

[0436] 550b: Second main bus

[0437] 551: Port

[0438] 551a: First port

[0439] 551b: Second port

[0440] 600: Power Panel

[0441] 610: Power input panel

[0442] 611: Power input terminal

[0443] 620: Power output panel

[0444] 621: Power output terminal

[0445] 700: Line conversion panel

[0446] 710: Input line conversion panel

[0447] 711: Input power conversion circuit

[0448] 712: Input opening

[0449] 713: Input line terminal

[0450] 720: Output line conversion panel

[0451] 721: Output power conversion circuit

[0452] 722: Output opening

[0453] 723: Output line terminal

[0454] S: Inverter panel space

Claims

1. An inverter panel, wherein: include: The inverter device converts DC power into AC power and supplies it to external loads; as well as A main bus bar receives direct current from the outside and transmits it to the inverter device, receives the converted alternating current from the inverter device and supplies it to the external load; The inverter device comprises: A first device unit, in which an inverter module is provided for converting direct current into alternating current and supplying the alternating current to an external load; a second device part, located adjacent to the first device part, and having a filter disposed therein for filtering noise of the alternating current; and a cover body, in which the first device part and the second device part are accommodated; On one side of the cover body is provided: an input terminal portion for receiving the direct current; and An output terminal part, outputting the alternating current converted by the inverter module; The main bus bar includes a port capable of directly connecting the main bus bar to the input terminal portion and the output terminal portion; The inverter panel is formed with a plurality of inverter accommodating portions for accommodating the inverter devices respectively; The main bus bar and the port are provided for each of the inverter devices.

2. The inverter panel according to claim 1, wherein: A panel air intake portion is formed on the front side of the inverter housing portion; A panel exhaust portion is formed on the rear side of the inverter housing portion.

3. The inverter panel according to claim 1, wherein: The inverter device is provided with a partition portion that physically separates the first device portion and the second device portion.

4. A power conversion device, wherein: include: The inverter device converts DC power into AC power and supplies it to external loads; as well as N inverter panels accommodating the inverter device; The inverter device comprises: A first device unit having an inverter module disposed therein for converting direct current into alternating current and supplying the alternating current to an external load; and A second device part, located adjacent to the first device part, and having a filter disposed therein for filtering noise of the alternating current; Each of the inverter panels is provided with a main bus bar, the main bus bar receives direct current from the outside and transmits it to the inverter device, receives converted alternating current from the inverter device and supplies it to the external load; Each of the inverter panels is formed with a plurality of inverter accommodating portions for accommodating the inverter devices respectively; providing the main bus bar for each inverter device; If each of the N inverter panels is electrically connected to the main bus bars of the other inverter panels, the power conversion capacity is increased by N times.

5. The power conversion device according to claim 4, wherein: The main bus bar extends toward one side of the inverter panel and another side opposite to the one side, Each of the N inverter panels is arranged in a row in such a manner that the main bus bars of the other inverter panels are in contact with each other.

6. The power conversion device according to claim 5, wherein: A power input panel for receiving the DC power transmitted from the outside is provided on one side of the N inverter panels. A power output panel is provided on the other side of the N inverter panels to transmit the converted AC power to the external load. The power input panel, the N inverter panels, and the power output panel are electrically connected to each other.

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