Power converter

Abstract

To provide a power conversion device that facilitates installation. [Solution] The power conversion device includes a power conversion circuit and a housing that houses the power conversion circuit, the housing having a first support portion on a first surface and a second support portion on a second surface different from the first surface, the first support portion including a first convex portion or a first concave portion, the second support portion including a second convex portion or a second concave portion, and the first support portion and the second support portion can be supported by the fingers of the worker when the housing is lifted by the worker.

Description

Technical Field

[0001] The present disclosure relates to a power conversion device.

Background Art

[0002] A power supply system combining a solar power generation system and a power storage system is known. For example, Patent Document 1 below discloses a system including a solar cell, a storage battery, and a power conditioner. The power conditioner converts DC power generated by the solar cell into AC power and supplies it to a load, and also charges the storage battery with the generated power of solar power generation.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0004] Referring to Figure 1, the power supply system 900 includes a power conditioner (hereinafter referred to as PCS) 902 and a battery 904. The battery 904 is installed on the ground, the photovoltaic (PV) modules 906 are installed on the roof or elsewhere, and the PCS 902 is mounted on the wall or frame of the building. The PCS 902 converts the power generated by the PV modules 906 (DC power) into AC power and supplies it to the power switch 908. The power switch 908 is, for example, a relay switch. The power switch 908 receives external control and switches the connection between the PCS 902 and the grid 914. Regarding the connection between the PCS 902 and the distribution board 910, the power switch 908 includes a path (wiring) that permanently connects the two. In other words, while the PV module 906 is generating power, the output power of the PCS 902 is output to the distribution board 910, allowing the load 912 to be operated without using commercial power supplied from the grid 914. If there is surplus power generated by the PV module 906, it is also possible to supply (sell) the surplus power to the grid 914. The storage battery 904 is a rechargeable secondary battery. The storage battery 904 is charged by the DC voltage (charging voltage) generated by the PCS 902, which is converted from the AC power of the grid 914. The storage battery 904 is also charged by the DC voltage (charging voltage) generated by the PCS 902, which is converted from the DC power of the PV module 906. The discharge power of the storage battery 904 is converted to AC power by the PCS 902 and supplied to the distribution board 910 via the power switch 908. This allows the load 912 to be operated without using commercial power supplied from the grid 914.

[0005] In power supply systems, workability is sometimes required, for example, when installing a PCS (Power Conditioning System). Patent documents 2 to 4 disclose structures that take into consideration workability when handling heavy electrical equipment. Patent document 2 discloses providing a handle on the top wall (top surface) of the electrical equipment. Patent document 3 discloses providing handles in the center of the left and right sides of the housing that houses the electrical equipment. Patent document 4 discloses providing a suspension fitting at the bottom of the power generation module and lifting it using a sling, rope or wire.

[0006] However, none of the structures disclosed in Patent Documents 2 through 4 are suitable for housing a PCS. For example, consider a case where it is necessary to lift the housing containing the PCS higher than the worker's waist. With regard to Patent Document 2, it is not easy to lift it higher than the worker's waist. The handle portion of Patent Document 3 is located in the space sandwiched between the side of the main case and the side of the front cover, that is, it is housed inside the main case. Therefore, with the configuration disclosed in Patent Document 3, the handle portion cannot be used unless the main case is removed when installing electrical equipment. With regard to Patent Document 4, it is also not easy to install the housing containing the PCS at a height higher than a person's waist.

[0007] Therefore, this disclosure aims to provide a power conversion device that facilitates installation work. [Means for solving the problem]

[0008] A power conversion device according to one aspect of the present disclosure includes a power conversion circuit and a housing housing the power conversion circuit, the housing having a first support on a first surface and a second support on a second surface different from the first surface, the first support including a first convex portion or a first concave portion, the second support including a second convex portion or a second concave portion, and the first and second support portions can be supported by the fingers of an operator when the housing is lifted by the operator. [Effects of the Invention]

[0009] According to this disclosure, a power conversion device that facilitates installation work can be provided. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a block diagram showing the configuration of a conventional power supply system. [Figure 2] Figure 2 is a perspective view showing the configuration of a power converter according to an embodiment of this disclosure. [Figure 3] Figure 3 is a perspective view showing a power supply system with the power converter shown in Figure 1 installed at the top. [Figure 4] Figure 4 is a perspective view showing the installation process of the power converter shown in Figure 1. [Figure 5] Figure 5 is a plan view showing the power converter shown in Figure 1 installed in a confined space. [Figure 6] Figure 6 is a perspective view showing a power conversion device according to the first modified example. [Figure 7] Figure 7 is a perspective view showing a power conversion device according to the second modified example. [Figure 8] Figure 8 is a horizontal cross-sectional view showing the recess shown in Figure 7 and its surrounding area. [Figure 9] Figure 9 is a perspective view showing a power conversion device according to the third modified example. [Figure 10] Figure 10 is a perspective view showing a power conversion device according to the fourth modified example. [Figure 11] Figure 11 is a perspective view showing a power conversion device according to the fifth modified example. [Modes for carrying out the invention]

[0011] [Description of Embodiments in this Disclosure] The embodiments of this disclosure are listed below for explanation. At least some of the embodiments described below may be combined in any way.

[0012] (1) The power conversion device according to the first aspect of the present disclosure includes a power conversion circuit and a housing that houses the power conversion circuit. The housing has a first support portion on a first surface and a second support portion on a second surface different from the first surface. The first support portion includes a first convex portion or a first concave portion, and the second support portion includes a second convex portion or a second concave portion. The first support portion and the second support portion can be supported by the fingers of an operator's hand when the housing is lifted by the operator. Thereby, the installation work of the power conversion device becomes easier.

[0013] (2) In the above (1), the housing may include a front surface and a rear surface. The front surface may include the first surface, and the rear surface may include the second surface. Thereby, the installation work of the power conversion device becomes even easier.

[0014] (3) In the above (1), the housing may include a side surface and a rear surface. The side surface may include the first surface, and the rear surface may include the second surface. Thereby, the installation work of the power conversion device becomes even easier.

[0015] (4) In the above (1), the housing may have at least one of a heat sink cover and an insertion port for inserting wiring into the housing on the rear surface. Each of the heat sink cover and the insertion port may be used as the second support portion. Thereby, existing components of the power conversion device can be used as support portions, eliminating the need to provide separate support portions and suppressing an increase in cost.

[0016] (5) In any one of the above (1) to (3), the housing may have a plurality of legs at the peripheral edge of the bottom surface. Of the peripheral edge, the portions on the first surface side and the second surface side where the legs are not arranged may be used as the first concave portion and the second concave portion, respectively. Thereby, the power conversion device can be stably supported, the stacking work becomes easier, and an increase in cost can be suppressed.

[0017] (6) In any one of (1) to (4) above, the housing may include a panel, and the first support portion may be formed integrally with the front panel. This does not increase the number of parts and helps to suppress cost increases.

[0018] (7) In any one of (1) to (4) and (6) above, the first support portion may be detachably arranged on the first surface of the housing. This improves the appearance by removing the first protrusion located on the first surface (e.g., the front) of the power converter after installation. In the case of the first recess, the appearance also improves by removing it and replacing it with a flat plate (decorative plate, etc.).

[0019] (8) In any one of (1) to (4), (6) and (7) above, the second support portion may be a second protrusion, and the second protrusion may be detachably arranged on the second surface of the housing. This makes it easier to perform wiring work on the second surface after the power converter has been installed by removing the second protrusion located on its second surface (e.g., the back).

[0020] [Details of the embodiments of this disclosure] In the following embodiments, identical parts are assigned the same reference numeral. Their names and functions are also identical. Therefore, detailed descriptions of them will not be repeated.

[0021] Referring to Figure 2, the power conversion device 100 according to the embodiment of this disclosure includes a power conversion circuit 102 and a housing 104 that houses the power conversion circuit 102. The power conversion circuit 102 has the function of converting DC power and AC power bidirectionally. The power conversion circuit 102 is, for example, a PCS and has a bidirectional DC / AC conversion function and a bidirectional DC / DC conversion function. The DC / AC conversion function and the DC / DC conversion function are realized by, for example, a bridge circuit using a plurality of semiconductor switching elements (FETs (Field Effect Transistors), etc.). The power conversion circuit 102 includes a control unit that controls each switching element (for example, PWM (Pulse Width Modulation) control) to realize the power conversion function.

[0022] The power conversion circuit 102 is connected to the battery and PV modules as a DC power source and to the grid as an AC power source, realizing a power system and supplying power to the load via a distribution board. The PV module consists of multiple solar cells connected in series and arranged on a plane, sealed using tempered glass or the like. The battery is a rechargeable secondary battery. Wiring from the grid (specifically, the power switch connected to the grid) and the PV modules is introduced into the housing 104 through an inlet (not shown) provided on the back 108 of the housing 104 and connected to the power conversion circuit 102.

[0023] For example, if a power supply system includes a power conversion circuit 102, a BMS (Battery Management System), and a battery, the power conversion circuit 102 converts AC power from the grid into DC power (charging power) during off-peak hours when electricity rates are low to charge the battery, and during the day converts the discharge power (DC power) from the battery into AC power to supply power to the load via a distribution board. The BMS has a protection function that monitors the status of the battery and disconnects the connection between the battery and the power conversion circuit 102 as needed, as well as a function to prevent inrush current when connecting the battery to the power conversion circuit 102. Each of the protection function and the inrush current prevention function can be implemented by an electrical circuit.

[0024] For example, if the power supply system includes a power conversion circuit 102 and PV modules, the power conversion circuit 102 converts the power generated by the PV modules (DC power) into AC power and supplies power to the load via a distribution board. Any surplus power generated by the PV modules is supplied to the grid (sold), and any power shortages to the load are supplied from the grid (purchased). Furthermore, if the power supply system includes the power conversion circuit 102, a storage battery, a BMS, and PV modules, in addition to the above operations, the power conversion circuit 102 can generate charging power from the surplus power generated by the PV modules and charge the storage battery.

[0025] The housing 104 is formed of a conductive material such as metal. The housing 104 includes a front surface 106 and a rear surface 108. With respect to the orthogonal axes (XYZ axes) shown in Figure 2, the front surface 106 and the rear surface 108 are formed parallel to each other and facing each other, along the Z-axis direction (e.g., vertical direction). The top and bottom surfaces of the housing 104 are formed parallel to the XY plane (e.g., horizontal plane). A first support portion 110 is positioned on the front surface 106, and a second support portion 112 is positioned on the rear surface 108. Each of the first support portion 110 and the second support portion 112 is a rectangular parallelepiped with a width L1, a depth L2, and a height L3. The first support portion 110 and the second support portion 112 are positioned to protrude from the front surface 106 and the rear surface 108, respectively, forming a convex portion. The first support section 110 and the second support section 112 are firmly fixed to the front 106 and rear 108, respectively, by screws, adhesive, and welding, respectively, to prevent easy attachment and detachment. As will be described later, the first support section 110 and the second support section 112 are grasped by a worker during the installation of the power system including the power converter 100, and the power converter 100 is lifted.

[0026] Referring to Figure 3, the power supply system 120 includes a power converter 100, a housing 124 containing a BMS 122, and a housing 128 containing a battery 126. Housings 104, 124, and 128 are stacked outdoors, with housing 128 at the bottom and housing 104 at the top. Housing 128 is fitted with fixing legs 130, which are fixed to a concrete base (not shown) installed on the ground using anchor bolts or the like. Housings 104, 124, and 128 are firmly fixed to each other and integrated using screws or the like. Figure 3 shows the same orthogonal axes (XYZ axes) as Figure 2, and the orientation of the stacked power converter 100 is the same as the orientation shown in Figure 2. Note that in Figure 3, the power conversion circuit 102 may be connected to a PV module.

[0027] Housings 124 and 128 are formed from a conductive material such as metal. The power conversion circuit 102 and the storage battery 126 are connected by wiring (not shown) via the BMS 122, and these wires are housed inside housings 104, 124, and 128. As a result, the power conversion circuit 102 operates as described above.

[0028] When installing the power supply system 120 shown in Figure 3, the enclosures 104, 124, and 128 are shipped from the factory and transported to the installation site. First, the mounting legs 130 attached to enclosure 128 are fixed to a base installed on the ground outside the house. Next, enclosure 124 is placed on top of enclosure 128, and enclosure 104 is placed on top of enclosure 124, and enclosures 104, 124, and 128 are fixed to each other. Therefore, the power supply system 120 shown in Figure 3 does not require installation on a wall or frame like the power supply system 900 shown in Figure 1, and the overall installation space is reduced. Also, unlike the PCS 902 and battery 904 shown in Figure 1, the wiring connecting the power conversion circuit 102, BMS 122, and battery 126 is not exposed, so the noise filter to reduce interference from the wiring can be simplified.

[0029] Referring to Figure 4, when stacking the housing 104 on top of the housing 124, the first support part 110 and the second support part 112 are grasped by the hands of the worker 920, the housing 104 is lifted, and placed on top of the stacked housings 128 and 124. Since the height H from the ground of the top surface of the stacked housing 124 is relatively high (for example, about 1 m), it is preferable that the first support part 110 and the second support part 112 be placed at the bottom of the front 106 and rear 108, respectively. The first support part 110 and the second support part 112 only need to be made of a material with sufficient strength to support the weight of the power converter 100 (several tens of kilograms), and can be made of metal or resin. The first support part 110 and the second support part 112 need to be large enough to be stably supported by a person's fingers, but it is preferable that they be small so as not to hinder the installation work and to consider the aesthetics after installation. For example, the width L1 should be 30 mm or more and the depth L2 should be 25 mm or more. The height L3 is arbitrary, as long as it ensures sufficient strength so that the first support part 110 and the second support part 112 do not deform.

[0030] Typically, PCS (Power Conditioning Systems) are heavy due to the inclusion of heavy components such as reactors and heat sinks, and the housing containing the PCS can weigh tens of kilograms, making stacking them at the installation site difficult for workers. In contrast, the power converter 100 shown in Figure 2 has a first support section 110 and a second support section 112. This allows workers to grip the first support section 110 and the second support section 112 and stably lift the power converter 100. Therefore, stacking the power converters 100 at the installation site of the power supply system 120 becomes easier. Furthermore, since heavy components such as heat sinks and reactors are located on the rear side of the PCS, the center of gravity is at the rear, and when lifting the PCS, a moment is generated that tends to cause it to tip backward. With the power converter 100 shown in Figure 2, workers can easily withstand such a moment by gripping the first support section 110 and the second support section 112, and stably hold the power converter 100.

[0031] The width L1 may be 60 mm or more. This allows two workers to safely lift the power converter 100 by gripping the first support part 110 and the second support part 112 from both the left and right sides of the power converter 100.

[0032] As described above, by providing support parts on the front 106 and rear 108, for example, as shown in Figure 5, even in a narrow installation space where the front and rear are sandwiched between walls 922 and 924, the worker 920 can lift the housing 104 and place it on top of the housing 124.

[0033] (First variation) In the above description, the case in which the first support portion 110 and the second support portion 112 are fixed to the front 106 and rear 108 of the housing 104, respectively, has been explained, but the invention is not limited to this. In the power conversion device according to the first modified example, the first support portion and the second support portion are provided in a detachable manner.

[0034] Referring to Figure 6, the power converter 200 according to the first modified example includes a power conversion circuit 102 and a housing 204 that houses the power conversion circuit 102. The housing 204 includes a front panel 206 and a rear panel 208. A first support portion 210 is fixed to the front panel 206 by screws 214. Similarly, a second support portion 212 is fixed to the rear panel 208 by screws. The power converter 200 differs from the power converter 100 shown in Figure 2 in the shape of the support portions, but is otherwise formed similarly to the power converter 100.

[0035] During the installation of the power system including the power converter 200, the first support part 210 and the second support part 212 are grasped by the worker, and the power converter 200 is lifted. Since the first support part 210 and the second support part 212 are detachably fixed to the front 206 and rear 208, respectively, by screws, the aesthetic appearance of the power system can be improved by removing the first support part 210 from the front 206 after the power system has been installed. Also, by removing the second support part 212 from the rear 208, wiring work on the rear of the power system can be made easier. After the first support part 210 and the second support part 212 are removed, hole plugs, for example, may be installed in the remaining screw holes.

[0036] Since the first support portion 210 and the second support portion 212 are attached and detached after the installation work, there are few constraints on the shape of the first support portion 210 and the second support portion 212. The first support portion 210 and the second support portion 212 may be larger than the first support portion 110 and the second support portion 112 (see Figure 2). The amount of protrusion from the front 206 and the back 208 may be larger than that of the first support portion 110 and the second support portion 112 (see Figure 2). In addition, the first support portion 210 and the second support portion 212 may be formed of a shape and material that is easy for the worker to grasp and does not burden the worker's hand. For example, the first support portion 210 and the second support portion 212 may have a rounded shape as shown in Figure 6. Furthermore, the first support portion 210 and the second support portion 212 may be formed from a flexible material, provided that they have sufficient strength to support the weight of the housing 204 containing the power conversion circuit 102.

[0037] (Second variation) In the above description, the case in which the first support portion and the second support portion protrude from the front and rear, respectively, has been explained, but the invention is not limited to this. The power conversion device according to the second modified example has a support portion with a recessed shape.

[0038] Referring to Figure 7, the power converter 220 according to the second modified example includes a power conversion circuit 102 and a housing 224 that houses the power conversion circuit 102. The housing 224 includes a front 226 and a rear 228. A first support portion 230 is located on the front 226, and a second support portion 232 is located on the rear 228. The power converter 220 differs from the power converter 100 shown in Figure 2 in the shape of its support portions, but is otherwise formed similarly to the power converter 100.

[0039] The first support portion 230 and the second support portion 232 are recesses with width L4, depth L5, and height L6, respectively, that are recessed from the front surface 226 and the rear surface 228. That is, each of the first support portion 230 and the second support portion 232 forms a recess. Figure 8 shows an example of a horizontal cross-sectional view (in the XY plane) of the first support portion 230 and its surroundings. The recess, which is the first support portion 230, is formed in member 234, and member 234 is fixed to an opening formed in the front surface 226 by screws 236. Member 234 may also be fixed to the front surface 226 by adhesive or welding. The second support portion 232, which is located on the rear surface 228 of the housing 224, can be formed in the same way.

[0040] In the installation of a power system including a power converter 220, the worker's fingers are inserted into the first support section 230 and the second support section 232 to lift the power converter 220. The width L4 should be 30 mm or more, and the depth L5 and height L6 should be 25 mm or more. This allows the worker to easily and stably lift the power converter 220. Therefore, stacking the power converters 220 at the power system installation site becomes easier. The width L4 may be 60 mm or more. This allows two workers to insert their fingers into the first support section 230 and the second support section 232 from both the left and right sides of the power converter 220 and safely lift the power converter 220.

[0041] As shown in Figure 8, by fixing the component 234 to the front 226 with screws, the component 234 can be removed once the installation of the power supply system is complete. When the component 234 is removed, an opening is exposed on the front 226, and attaching a flat plate (such as a decorative panel) with screws will improve the aesthetic appearance of the power supply system. In addition, it will be possible to prevent rainwater and dust from entering the housing 224.

[0042] The front surface 226 may be formed as a flat panel (hereinafter referred to as the front panel). In that case, the first support portion 230 may be formed integrally with the front panel. For example, the first support portion 230 may be formed by processing (e.g., press working) and deforming the flat front panel. This does not increase the number of parts and helps to suppress cost increases.

[0043] (Third variation) The above describes a case where support parts are provided on the front and back of the power converter, but it is not limited to this. In the third modified example, the power converter has a support part on its bottom.

[0044] Referring to Figure 9, the power conversion device 240 according to the third modified example includes a power conversion circuit 102 and a housing 244 that houses the power conversion circuit 102. The housing 244 includes a front 246, a rear 248, and a bottom 250. Legs 252 are positioned at the four corners of the bottom 250.

[0045] During the installation of the power system including the power converter 240, the worker can lift the power converter 240 by grasping the first lower part 254 on the front 246 side and the second lower part 256 on the rear 268 side of the base surface 250, where the legs 252 are not located. Therefore, the worker can stably support the power converter 240, making stacking work easier. The first lower part 254 has a simple shape, which helps to suppress cost increases. It is sufficient that the housing 244 can be stably placed on the housing 124 (see Figure 4), and the position of the legs 252 on the base surface 250 is not limited to the four corners of the base surface 250, but can be any position.

[0046] (Fourth variation) The above describes a case where a second support is provided on the back of the power converter, but the invention is not limited to this. In the fourth modified example, the power converter utilizes an existing component provided on the back as the second support.

[0047] Referring to Figure 10, the power converter 260 according to the fourth modified example includes a power converter circuit 102 and a housing 264 that houses the power converter circuit 102. The housing 264 includes a front 266 and a rear 268. A first support portion 270 is located on the front 266. The first support portion 270 is formed in the same manner as the first support portion 110 (see Figure 2). A heat sink 272 and a heat sink cover 274 are located on the rear 268. The heat sink 272 is for cooling heat-generating components (such as reactors and transformers) mounted on the circuits that realize the DC / AC conversion function and the DC / DC conversion function, which are included in the power converter circuit 102. The heat sink cover 274 is for protecting the heat sink 272. The lower part 276 of the heat sink cover 274 may be used as a second support portion.

[0048] During the installation of the power system including the power converter 260, the first support section 270 and the lower section 276 are grasped by the worker, and the power converter 260 is lifted. Therefore, stacking the power converters 260 at the power system installation site becomes easier. This allows existing components of the power converter to be used as the second support section, eliminating the need to provide a separate support section and suppressing cost increases.

[0049] Existing components that can be used as a second support are not limited to the heat sink cover. An opening is formed on the rear of the power converter for inserting wiring for connecting the power conversion circuit 102 to the grid and PV modules into the housing. Therefore, the opening may be used as a second support during the installation of the power supply system. The worker can grasp the first support 270 on the front 266 and lift the power converter by inserting their fingers into the opening on the rear.

[0050] In the above description, a case in which a protruding first support portion 270 is provided on the front surface 266 has been explained, but the invention is not limited to this. Instead of the first support portion 270, a first support portion 230 as shown in Figure 7 may be provided on the front surface 266. Furthermore, the first support portion provided on the front surface 266 may be detachable from the front surface 266, as shown in Figures 6 and 8.

[0051] (Fifth variation) The above describes a case where one support is provided on both the front and rear of the power converter, but it is not limited to this. In the fifth modified example, the power converter is provided with multiple support parts on both the front and rear.

[0052] Referring to Figure 11, the power converter 280 according to the fifth modified example includes a power conversion circuit 102 and a housing 284 that houses the power conversion circuit 102. The housing 284 includes a front 286 and a rear 288. Two first support parts 290 are arranged on the front 286 spaced apart from each other, and two second support parts 292 are arranged on the rear 288 spaced apart from each other. The power converter 280 differs from the power converter 100 shown in Figure 2 in the shape of the support parts, but is otherwise formed in the same way as the power converter 100. The shapes of the first support parts 290 and the second support parts 292 are the same, and each only needs to have a width L7 of 30 mm or more and a depth L8 of 25 mm or more. The height L9 of the first support parts 290 and the second support parts 292 is arbitrary, as long as sufficient strength is ensured so as not to deform.

[0053] This allows two workers to safely lift the power converter 280, which houses the power conversion circuit 102, by gripping the first support section 290 and the second support section 292 from both the left and right sides of the power converter 280. Therefore, it becomes easier to stack the power converter 280 on top of the other power converters at the installation site of the power supply system.

[0054] In the above description, a case was explained in which a first support portion 290 and a second support portion 292, which are convex portions, are provided on the front surface 286 and the rear surface 288, respectively, but the invention is not limited to this. Instead of the first support portion 290 and the second support portion 292, two first support portions 230 and two second support portions 232 (see Figure 7), which are concave portions, may be provided. Furthermore, the first support portion 290 and the second support portion 292 may be detachable, as shown in Figures 6 and 8.

[0055] The above describes a case where support parts of the same shape are fixed to the front and back of the power converter using the same fixing method, but it is not limited to this. The shape of the first support part provided on the front and the shape of the second support part provided on the back may be different. For example, the first support part on the front may be convex and the second support part on the back may be concave. Or the first support part on the front may be concave and the second support part on the back may be convex. The first support part may be detachably fixed to the front (see Figures 6 and 8), and the second support part may be fixed to the back in a way that prevents it from being detached. If the first support part on the front is detachable, the aesthetic appearance of the power system can be improved by removing the first support part after the power system has been installed.

[0056] The above describes the case where support parts are placed on the front and rear of the power converter, but is not limited to this. The front can also be described as the front side, and the rear as the rear side. Therefore, it is sufficient to have support parts on two sides of the power converter. Sides include the right side, left side, front, and rear. Workers can grasp the support parts and lift the power converter stably. Therefore, stacking power converters at the power system installation site becomes easier.

[0057] The present disclosure has been described above by describing embodiments, but the embodiments described above are illustrative and the present disclosure is not limited to the embodiments described above. The scope of the present disclosure is as indicated by each claim of the claims, with reference to the description of the detailed description of the invention, and includes all modifications within the meaning and scope equivalent to the wording contained herein. [Explanation of symbols]

[0058] 100, 200, 220, 240, 260, 280 Power converters 102 Power Conversion Circuit 104, 124, 128, 204, 224, 244, 264, 284 cabinets 106, 206, 226, 246, 266, 286 front 108, 208, 228, 248, 268, 288 back 110, 210, 230, 270, 290 1st support part 112, 212, 232, 292 2nd support part 120,900 Power Systems 122 BMS 126,904 Storage batteries 130 Fixed leg 214, 236 screws 234 components 250 base 252 Legs 254 First Lower Section 256 Second Lower Section 272 Heatsink 274 Heatsink Cover 276 Lower part 902 PCS 906 PV module 908 Power Switch 910 Distribution board 912 load 914 lineage 920 workers 922, 924 Wall surfaces Height H, L3, L6, L9 L1, L4, L7 width L2, L8 depth L5 Depth

Claims

1. Power conversion circuit, The enclosure includes the power conversion circuit, The aforementioned enclosure is Having a first support portion on a predetermined first surface, The second support portion is located on a second surface different from the first surface, The first support portion includes a first convex portion or a first concave portion, The second support portion includes a second convex portion or a second concave portion, The first support portion and the second support portion are power converters that can be supported by the fingers of an operator when the housing is lifted by the operator.

2. The aforementioned enclosure includes the front and rear, The aforementioned front surface includes the first surface, The power conversion device according to claim 1, wherein the rear surface includes the second surface.

3. The aforementioned enclosure includes the sides and the rear, The aforementioned side includes the first surface, The power conversion device according to claim 1, wherein the rear surface includes the second surface.

4. The housing has at least one of a heat sink cover and an insertion opening for inserting wiring into the housing on its rear side. The power conversion device according to claim 1, wherein each of the heat sink cover and the insertion opening can be used as the second support portion.

5. The housing has a plurality of legs on the periphery of its bottom surface, The power conversion device according to any one of claims 1 to 3, wherein the portion of the peripheral edge on the first surface side and the portion on the second surface side where the legs are not arranged can be used as a first recess and a second recess, respectively.

6. The aforementioned enclosure includes a front panel, The power conversion device according to any one of claims 1 to 4, wherein the first support portion is formed integrally with the front panel.

7. The power conversion device according to any one of claims 1 to 4, wherein the first support portion is detachably disposed on the first surface of the housing.

8. The second support portion is the second protrusion, The power conversion device according to any one of claims 1 to 4, wherein the second protrusion is detachably disposed on the second surface of the housing.

Images