Hydrogen production power supply cabinet

Abstract

The utility model relates to a hydrogen production power supply cabinet, comprising a common unit cabinet which is suitable for arranging an output busbar; and a plurality of conversion unit cabinets, wherein the interior of each conversion unit cabinet is suitable for being provided with a power conversion module. The plurality of conversion unit cabinets are adjacently arranged on at least one transverse side of the common unit cabinet with the common unit cabinet, and comprise at least two conversion unit cabinets which are longitudinally arranged on the same transverse side of the common unit cabinet; and the output busbar only extends in the common unit cabinet along the transverse direction and is connected with the power conversion module in each conversion unit cabinet. Compared with a structure in which unit cabinets are arranged in a row in the prior art, the hydrogen production power supply cabinet has the advantages that the transverse space of the whole hydrogen production power supply cabinet can be greatly reduced, the output busbar can be only arranged in the shared unit cabinet, the length and the use amount of the output busbar are saved, and the heat dissipation efficiency and the heat dissipation cost of the output busbar are improved.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen production power technology, and in particular to a hydrogen production power cabinet with improved structural layout. Background Technology

[0002] Hydrogen energy refers to the chemical energy released by the chemical reaction between hydrogen and oxygen. Because the product is water, hydrogen energy is considered one of the most promising clean energy sources of this century. Hydrogen energy can be obtained or produced through various pathways, including primary energy (various forms of energy and resources directly derived from nature without processing or conversion), secondary energy (energy products obtained after processing and conversion of primary energy), and industrial applications. Compared to chemical energy, using new energy sources to produce hydrogen (i.e., using electricity to electrolyze water to produce hydrogen) is more in line with the global green revolution.

[0003] Hydrogen production power supplies serve as the connection and conversion hub between various new energy power sources (such as wind power and solar power) and electrolyzers, providing the appropriate voltage and current to facilitate the water electrolysis process and produce hydrogen. Current technologies typically use a hydrogen production power supply cabinet to power the electrolyzer. However, when the hydrogen production power supply cabinet uses multiple power conversion units / power units, these units, along with those containing control units (COUs) and output processing units (OPUs), are usually arranged in a row. This not only occupies a large amount of horizontal space and results in low space utilization, but also requires numerous long, horizontally extending common output buses to connect to the output terminals of each power conversion unit. Furthermore, the common output buses generate a significant amount of heat, requiring each power conversion unit to be equipped with cooling devices (such as air-cooled or water-cooled systems) to dissipate heat from its extended common output buses, increasing the overall cost of the equipment in terms of hardware, space, and installation. Utility Model Content

[0004] The purpose of this invention is to solve at least one of the above-mentioned problems and / or other defects in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a hydrogen production power supply cabinet is provided, comprising: a common unit cabinet, wherein an output busbar is adapted to be installed within the common unit cabinet; and a plurality of conversion unit cabinets, each of which is adapted to be installed with a power conversion module. The plurality of conversion unit cabinets are all arranged adjacent to the common unit cabinet on at least one lateral side of the common unit cabinet, and include at least two conversion unit cabinets arranged longitudinally on the same lateral side of the common unit cabinet. The output busbar extends laterally only within the common unit cabinet and is connected to the power conversion module within each conversion unit cabinet.

[0006] According to one embodiment of the present invention, the output busbar is centrally located longitudinally within the shared unit cabinet.

[0007] According to one embodiment of the present invention, there are four conversion unit cabinets, two of which are arranged back-to-back on one side of the common unit cabinet, and the other two are arranged back-to-back on the other side of the common unit cabinet.

[0008] According to one embodiment of the present invention, the shared unit cabinet includes a door panel on one of its longitudinal sides, a first air inlet is provided at the lower part of the door panel, and a first air outlet corresponding to the first air inlet is provided on the top wall of the shared unit cabinet.

[0009] According to one embodiment of the present invention, the hydrogen production power cabinet further includes a first fan installed at the first air inlet or at the first air outlet.

[0010] According to one embodiment of the present invention, the shared unit cabinet is provided with a vertical partition that divides its internal cavity into a first cavity and a second cavity arranged longitudinally. The output busbar is disposed in the first cavity, and the hydrogen production power cabinet further includes a control module disposed in the second cavity. A ventilation opening connecting the first cavity and the second cavity is formed between the bottom edge of the vertical partition and the bottom wall of the shared unit cabinet. The first cavity is closer to the first air inlet in the longitudinal direction than the second cavity. Thus, a first air duct is formed in the shared unit cabinet from the first air inlet through the first cavity to the first air outlet for heat dissipation of the output busbar, and a second air duct is formed from the first air inlet through the bottom of the first cavity, the ventilation opening and the second cavity to the first air outlet for heat dissipation of the control module.

[0011] According to one embodiment of the present invention, each conversion unit cabinet includes a door panel, a second air inlet is provided at the lower part of the door panel, and a second air outlet corresponding to the second air inlet is provided on the top wall of each conversion unit cabinet, thereby forming a third air duct in each conversion unit cabinet that extends from the second air inlet through the inner cavity of the conversion unit cabinet to the second air outlet for heat dissipation of the power conversion module in the conversion unit cabinet.

[0012] According to one embodiment of the present invention, the hydrogen production power cabinet further includes a second fan installed at the second air inlet.

[0013] According to one embodiment of the present invention, the output busbar includes a DC positive output busbar and a DC negative output busbar arranged at intervals in the common unit cabinet, and the hydrogen production power cabinet also includes an AC input terminal introduced from the outside through its top wall and from between the common unit cabinet and each conversion unit cabinet into the hydrogen production power cabinet.

[0014] According to one embodiment of the present invention, the shared unit cabinet and each conversion unit cabinet include a door panel that is non-removably hinged to the frame of the corresponding unit cabinet or detachably hung on the frame of the corresponding unit cabinet.

[0015] This utility model's hydrogen production power cabinet arranges multiple conversion unit cabinets adjacent to a shared unit cabinet on one or two lateral sides of the shared unit cabinet. At least two conversion unit cabinets on the same lateral side are stacked longitudinally, allowing the output busbars to connect to the power conversion modules within each conversion unit cabinet simply by extending laterally within the shared unit cabinet. Compared to the existing structure where unit cabinets are arranged in a row, this significantly reduces the lateral space of the entire hydrogen production power cabinet. The output busbars only need to be centrally located within the shared unit cabinet, eliminating the need for lengthy lateral extensions to connect to individual power conversion modules. This saves on the length and quantity of output busbars, facilitates their installation, and allows for centralized heat dissipation of all output busbars within a single space of the shared unit cabinet, rather than requiring separate heat dissipation for each output busbar in each conversion unit cabinet. This improves heat dissipation efficiency and saves on heat dissipation costs. Furthermore, the longitudinal stacking of the shared unit cabinet with its adjacent conversion unit cabinets increases its longitudinal dimensions, providing more space for heat dissipation of the output busbars. Attached Figure Description

[0016] The features and advantages of this utility model will become clear from the following detailed description provided with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and therefore should not be considered as limitations on this utility model, wherein:

[0017] Figure 1 The diagram shows a front perspective view of a hydrogen production power supply cabinet according to an embodiment of the present invention.

[0018] Figure 2 Show Figure 1 The image shows a rear-view perspective view of the hydrogen production power supply cabinet.

[0019] Figure 3 Show Figure 1 The diagram shows the heat dissipation within the shared unit cabinet of the hydrogen production power cabinet.

[0020] Figure 4 A schematic diagram of a hydrogen production power supply cabinet according to another embodiment of the present invention is shown, illustrating that the first fan of the hydrogen production power supply cabinet is located at the junction with... Figure 3 Different locations.

[0021] Figure 5 Show Figure 1 The diagram shows the heat dissipation of two back-to-back conversion unit cabinets installed on the same horizontal side of a shared unit cabinet.

[0022] Figure 6 Show Figure 1 The front view of the unit cabinet in the hydrogen production power cabinet shown.

[0023] Figure 7 Show Figure 6 The side view of the unit cabinet shown.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Shared unit cabinet; 11. Output busbar; 12. Vertical partition; 13. First cavity; 14. Second cavity; 15. Control module; 16. Ventilation opening; 17. First air inlet; 18. First air outlet; 2. Conversion unit cabinet; 21. Power conversion module; 22. Second air inlet; 23. Second air outlet; 24. Inner cavity; 25. AC input terminal; 26. Frame; 27. Door panel; 28. Handle; 3. First fan; 4. Second fan; X, Horizontal; Y, Vertical; Z, Tall. Detailed Implementation

[0026] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to enable those skilled in the art to more fully understand and implement the present invention. However, it will be apparent to those skilled in the art that implementations of the present invention may not include some of these specific details. Furthermore, it should be understood that the present invention is not limited to the specific embodiments described. Rather, the present invention can be conceived to be implemented with any combination of the features and elements described below, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments, and advantages are for illustrative purposes only and should not be construed as elements or limitations of the claims unless expressly set forth in the claims.

[0027] The terms "first" and "second" are used below to describe the elements of this application. These terms are used only to distinguish the individual elements and not to limit the nature, order, or number of these elements. The terms "comprising" and "having" are used to indicate an open-ended inclusion and mean that there may be additional elements / components besides those listed.

[0028] Figure 1 and 2 A hydrogen production power supply cabinet according to one embodiment of the present invention is shown. Figure 1 and 2 As shown, the hydrogen production power cabinet according to this embodiment may include a common unit cabinet 1 and multiple conversion unit cabinets 2. The common unit cabinet 1 may include a generally cuboid frame structure and multiple walls (e.g., side walls, top walls, and bottom walls) connected to the frame structure to enclose an internal cavity forming the common unit cabinet 1. An output busbar 11 is installed inside the internal cavity of the common unit cabinet 1. Each conversion unit cabinet 2 may also include a generally cuboid frame structure and multiple walls connected to the frame structure to enclose an internal cavity forming the conversion unit cabinet 2. A power conversion module 21 is installed inside the internal cavity of the conversion unit cabinet 2. The output terminal of the power conversion module in each conversion unit cabinet 2 is connected to the output busbar 11 to output the converted power externally via the output busbar 11.

[0029] Multiple conversion unit cabinets 2 are all arranged adjacent to the shared unit cabinet 1 on its side (in Figure 1 and 2 (Arranged roughly on the left and right sides of the shared unit cabinet 1). In this application, Figure 1 and 2 The left and right directions, that is, the directions in which each transfer unit cabinet 2 is adjacent to the shared unit cabinet 1, are called the horizontal X. Figure 1 and 2 The longitudinal direction, which is the direction perpendicular to the horizontal direction (X) within the horizontal plane where the hydrogen production power cabinet is placed, is called the longitudinal direction (Y). Figure 1 and 2 The vertical direction, which is perpendicular to both the horizontal (X) and vertical (Y) directions, is called the vertical (Z).

[0030] In this invention, multiple transfer unit cabinets 2 are arranged on at least one lateral side of a common unit cabinet 1, and include at least two transfer unit cabinets 2 arranged longitudinally (Y) on the same lateral side of the common unit cabinet 1. In other words, all transfer unit cabinets 2 are adjacent to the common unit cabinet 1 on one or the other lateral side. Figure 1 and 2 In this configuration, transfer unit cabinets 2 are arranged on both transverse sides of the shared unit cabinet 1, but they may also be arranged on only one transverse side. Here, "adjacent" can include the case where the shared unit cabinet 1 and the transfer unit cabinet 2 are directly adjacent to each other by sharing the same side wall, or it can include the case where the shared unit cabinet 1 and the transfer unit cabinet 2 are indirectly adjacent to each other by having one side wall facing each other and separated by a small gap. In addition, at least two transfer unit cabinets 2 are arranged stacked along the longitudinal Y direction on the same transverse side of the shared unit cabinet 1. Figure 1 and 2In this design, two conversion unit cabinets 2 are arranged along the longitudinal Y direction on the same transverse side of the shared unit cabinet 1. However, three or more conversion unit cabinets 2 can also be arranged along the longitudinal Y direction on the same transverse side. In this way, the size of the entire hydrogen production power cabinet in the transverse X direction can be controlled to be the sum of the transverse dimensions of one shared unit cabinet 1 and one conversion unit cabinet 2, or the sum of the transverse dimensions of one shared unit cabinet 1 and two conversion unit cabinets 2, without occupying too much transverse space as in the existing technology where each unit cabinet is arranged in a row along the transverse direction.

[0031] Furthermore, since each conversion unit cabinet 2 is adjacent to the common unit cabinet 1 on its lateral side, the output busbar 11 only needs to be centrally arranged within the common unit cabinet 1 or only extend laterally within the common unit cabinet, instead of extending excessively to both sides to connect to the power conversion modules in each conversion unit cabinet 2. This saves on the length and quantity of the output busbar and facilitates its installation. It should be noted that in this application, "the output busbar only extends within the common unit cabinet or is only arranged within the common unit cabinet" means that at least the vast majority of the output busbar is located within the common unit cabinet. However, in the case where the common unit cabinet 1 and the conversion unit cabinet 2 are indirectly adjacent, the end of the output busbar that is directly connected to the power conversion module or connected to the power conversion module via another connecting busbar can also extend slightly beyond the common unit cabinet.

[0032] Since at least two transfer unit cabinets 2 are stacked along the longitudinal Y direction on at least one lateral side of the shared unit cabinet 1, the longitudinal dimension of the shared unit cabinet adjacent to them can be increased compared with the prior art. This provides a larger individual heat dissipation space for the output busbars that are only located in the shared unit cabinet (it is not necessary to dissipate heat for the output busbars in each transfer unit cabinet as in the prior art), thereby improving heat dissipation efficiency and saving heat dissipation costs.

[0033] The hydrogen production power cabinet in this embodiment can convert AC power into DC power to provide a stable DC power supply for water electrolysis. Therefore, the power conversion module 21 in each conversion unit cabinet 2 can mainly include, for example, a rectifier and filter module, an AC-DC power module with rectification and voltage regulation, etc. In other embodiments, the hydrogen production power cabinet may also involve, for example, converting DC power into DC power of different voltages or converting DC power into AC power. In this case, the power conversion module 21 may include a corresponding transformer module or inverter module, etc. In this embodiment, in order to input three-phase AC power into the hydrogen production power cabinet, for example, three AC input terminals 25 are introduced from its exterior through its top wall between the common unit cabinet 1 and each conversion unit cabinet 2. These AC input terminals are connected to the input terminals of the corresponding power conversion module 21. The output busbar 11 is used to output DC power, and therefore may include two arranged at intervals in the common unit cabinet 1, one output busbar 11 for positive DC power output and the other output busbar 11 for negative DC power output.

[0034] Advantageously, the output busbar 11 is centrally located in the longitudinal Y direction within the shared unit cabinet 1. This is because at least two conversion unit cabinets 2 are stacked along the longitudinal Y direction on the same transverse side of the shared unit cabinet 1. Centralizing the output busbar 11 in the longitudinal Y direction, compared to its offset location, ensures a relatively shorter distance from each conversion unit cabinet 2, preventing excessive distances from one or more conversion unit cabinets 2 in the longitudinal Y direction. This also prevents excessively long connecting busbars for linking the output busbar 11 to the power conversion modules within each conversion unit cabinet, resulting in a relatively shorter total length of all connecting busbars. This saves material in busbar manufacturing and reduces heat generation. It should be noted that "centralized" here does not mean precisely centered in the longitudinal Y direction within the shared unit cabinet 1; some deviation is permissible. The basic principle is to ensure that the distances from the output busbar 11 to the power conversion modules within each conversion unit cabinet are relatively balanced and short.

[0035] A typical hydrogen production power cabinet in the prior art has four conversion unit cabinets and one common unit cabinet. Each side of the common unit cabinet has two conversion unit cabinets, and the five unit cabinets are arranged in a row. Figure 1 and 2The illustrated embodiment shows a preferred configuration of the hydrogen production power cabinet after structural improvements according to the present invention. In this embodiment, there are a total of four conversion unit cabinets 2, with two conversion unit cabinets 2 arranged back-to-back on one lateral side of a shared unit cabinet 1, and the other two conversion unit cabinets 2 arranged back-to-back on the other lateral side of the shared unit cabinet 1. That is, each conversion unit cabinet 2 includes a door panel on one longitudinal side, and its rear wall is opposite to the door panel. The rear walls of the two conversion unit cabinets 2 located on the same lateral side of the shared unit cabinet 1 are arranged close together or separated by a small gap, while the doors of the two conversion unit cabinets 2 are arranged back-to-back. This is referred to as two conversion unit cabinets arranged back-to-back. The hydrogen production power cabinet of the present invention will be further explained below using this configuration with four conversion unit cabinets 2 as an example.

[0036] Optionally, refer to Figures 1 to 3 As shown, a vertical partition 12 is provided in the inner cavity of the shared unit cabinet 1. The vertical partition 12 extends along the horizontal (X) and vertical (Y) directions of the shared unit cabinet 1, thereby dividing the inner cavity of the shared unit cabinet 1 into a first cavity 13 and a second cavity 14 arranged along the vertical (Y) direction. The first cavity 13 can be used to house the output processing module (OPU) of the hydrogen production power cabinet. The output busbar 11 is also arranged in the first cavity 13, providing a separate heat dissipation space for the output busbar 11. In addition, the hydrogen production power cabinet may also include a control module (COU) 15, which is arranged in the second cavity 14, also providing a separate heat dissipation space for the control module 15. In this embodiment, since the output busbar 11 generates more heat than the control module 15, it can be arranged as follows: Figure 3 The vertical partition 12 is configured such that the space of the first cavity 13 is larger than the space of the second cavity 14, thereby providing a larger heat dissipation space for the output busbar 11.

[0037] To facilitate the maintenance of components located on both sides of the vertical partition 12 within the shared unit cabinet 1, the shared unit cabinet 1 can be configured on both sides of the vertical partition 12. Figure 3 Both the left and right sides of the unit cabinet 1 include door panels, one of which, together with the vertical partition 12, defines a first cavity 13, and the other door panel, together with the vertical partition 12, defines a second cavity 14. In this document, these two door panels are referred to as the door panel of the first cavity 13 and the door panel of the second cavity 14, respectively. For heat dissipation, for example, the door panel of the first cavity 13 may have a first air inlet 17 at its lower part, while the top wall of the shared unit cabinet 1 may have a first air outlet 18.

[0038] like Figure 3 As shown, a ventilation opening 16 is formed between the bottom edge of the vertical partition 12 and the bottom wall of the shared unit cabinet 1, connecting the first cavity 13 and the second cavity 14. Air enters the bottom of the first cavity 13 from the first air inlet 17 (e.g., Figure 3 After the arrow with a shaded diagonal line in the lower left corner is shown), a portion of the air flows upward through the first cavity 13 and out through the first air outlet 18 (as shown in the image). Figure 3 (As shown by the hollow arrow on the left), thus forming a first air duct for heat dissipation of the output busbar 11; another part of the air enters the second cavity 14 through the vent 16, flows upward through the second cavity 14 and flows out through the first air outlet 18 (as shown by the hollow arrow on the left), thereby ...). Figure 3 (As shown by the dark arrow on the right), thus forming a second air duct for heat dissipation of the control module 15. In this embodiment, the first air outlet 18 for the first and second air ducts can be two separate outlets, or it can be as follows: Figure 3 The integral first air outlet 18 shown is positioned across the top of the first cavity 13 and the second cavity 14 at corresponding positions.

[0039] In the above embodiments, to improve heat dissipation, a first fan 3 can also be provided for the shared unit cabinet 1. The first fan 3 can be as follows: Figure 3 The air inlet 17, as shown, draws air from outside the shared unit cabinet 1 into its interior cavity through positive pressure and pushes it toward the first air outlet 18. Figure 4 In another embodiment shown, the first fan 3 can be located at the first air outlet 18, which generates negative pressure within the shared unit cabinet 1 to draw air outwards. Compared to the first fan 3 located at the first air inlet 17, which uses positive pressure to create a more directional airflow, the first fan 3 located at the first air outlet 18 can utilize negative pressure to generate a gentler and more comprehensive cooling airflow within the shared unit cabinet 1, minimizing airflow leaks within the shared unit cabinet 1, thereby improving the cooling effect on the output busbar 11 and the control module 15.

[0040] In addition, a heat dissipation duct for the power conversion module 21 inside the conversion unit cabinet 2 is also formed. Figure 5 Two conversion unit cabinets 2 located on the same transverse side of the shared unit cabinet 1 are shown. Each conversion unit cabinet 2 includes a door panel located on its longitudinal outer side. A second air inlet 22 is provided at the lower part of the door panel, and a second air outlet 23 corresponding to the second air inlet 22 is provided on the top wall of the conversion unit cabinet 2. Thus, as... Figure 5 As shown by the hollow arrow on the left, for the left-side conversion unit cabinet 2, air enters through its second air inlet 22, flows upward through its inner cavity, and then flows out through the second air outlet 23, thus forming a third air duct for cooling the power conversion module 21 inside the conversion unit cabinet 2. For the right-side conversion unit cabinet 2, as... Figure 5 The arrow with a shaded diagonal line on the right side also forms a third air duct with the same airflow direction. In this embodiment, the second air outlets 23 of the two conversion unit cabinets 2 can be separated into two independent air outlets, or they can be... Figure 5The integrated air outlet is shown. Similarly, in this embodiment, a second fan 4 to improve heat dissipation can be provided in each conversion unit cabinet 2, which can be, for example, located at the second air inlet 22.

[0041] Conventionally, the doors of the shared unit cabinet 1 and the transfer unit cabinet 2 can be non-removably hinged to the frames of the respective unit cabinets, thus forming pivotally opening and closing doors. However, such doors take up considerable space when open and may obstruct maintenance operations. Therefore, as... Figure 6 and 7 As shown, the door panel 27 of unit cabinet 1 or 2 can also be designed to be detachably attached to the frame 26 of the corresponding unit cabinet. For example, matching hooks and hanging holes are provided on the top or side edge of the frame 26 of the unit cabinet and at the corresponding position on the door panel 27. The door panel 27 is installed on the frame 26 by engaging the hooks in the hanging holes. When maintenance is required, the entire door panel can be completely removed from the frame 26 with the help of the handle 28 on the door panel 27, without taking up any space or hindering maintenance operations.

[0042] Various modifications and variations can be made to the embodiments disclosed above without departing from the scope or spirit of this invention. Other embodiments of this invention will be apparent to those skilled in the art based on the practice of this invention disclosed in this specification. This specification and the examples disclosed herein should be considered illustrative only, and the true scope of this invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogen-producing power cabinet, characterized by include: A shared unit cabinet (1) is provided, wherein an output busbar (11) is adapted to be installed in the shared unit cabinet; and Multiple conversion unit cabinets (2), each of which is suitable for installing a power conversion module (21), The plurality of transfer unit cabinets are all arranged adjacent to the common unit cabinet on at least one lateral side of the common unit cabinet, and include at least two transfer unit cabinets arranged longitudinally on the same lateral side of the common unit cabinet. The output busbar extends laterally only within the shared unit cabinet and connects to the power conversion module within each conversion unit cabinet.

2. The hydrogen-producing power cabinet of claim 1, wherein, The output busbar (11) is centrally located in the longitudinal direction within the shared unit cabinet (1).

3. The hydrogen-producing power cabinet of claim 2, wherein, There are four conversion unit cabinets (2), two of which are arranged back-to-back on one side of the common unit cabinet (1), and the other two are arranged back-to-back on the other side of the common unit cabinet.

4. The hydrogen-producing power cabinet of any one of claims 1 to 3, wherein, The shared unit cabinet (1) includes a door panel on one of its longitudinal sides, and a first air inlet (17) is provided at the lower part of the door panel. The top wall of the shared unit cabinet is provided with a first air outlet (18) corresponding to the first air inlet.

5. The hydrogen production power supply cabinet according to claim 4, characterized in that, It also includes a first fan (3) installed at the first air inlet (17) or at the first air outlet (18).

6. The hydrogen production power supply cabinet according to claim 5, characterized in that, The shared unit cabinet (1) is provided with a vertical partition (12) that divides its internal cavity into a first cavity (13) and a second cavity (14) arranged longitudinally. The output busbar (11) is located in the first cavity. The hydrogen production power cabinet also includes a control module (15) located in the second cavity. A ventilation opening (16) connecting the first cavity (13) and the second cavity (14) is formed between the bottom edge of the vertical partition (12) and the bottom wall of the shared unit cabinet (1). The first cavity is closer to the first air inlet in the longitudinal direction than the second cavity. Thus, a first air duct is formed in the shared unit cabinet from the first air inlet through the first cavity to the first air outlet for heat dissipation of the output busbar, and a second air duct is formed from the first air inlet through the bottom of the first cavity, the ventilation opening and the second cavity to the first air outlet for heat dissipation of the control module.

7. The hydrogen production power supply cabinet according to any one of claims 1 to 3, characterized in that, Each conversion unit cabinet (2) includes a door panel, and a second air inlet (22) is provided at the bottom of the door panel. The top wall of each conversion unit cabinet is provided with a second air outlet (23) corresponding to the second air inlet, thereby forming a third air duct in each conversion unit cabinet that runs from the second air inlet through the inner cavity of the conversion unit cabinet to the second air outlet for heat dissipation of the power conversion module in the conversion unit cabinet.

8. The hydrogen production power supply cabinet according to claim 7, characterized in that, It also includes a second fan (4) installed at the second air inlet.

9. The hydrogen production power supply cabinet according to any one of claims 1 to 3, characterized in that, The output busbar (11) includes a DC positive output busbar and a DC negative output busbar arranged at intervals in the common unit cabinet. The hydrogen production power cabinet also includes an AC input terminal (25) introduced from the outside through its top wall and from between the common unit cabinet and each conversion unit cabinet into the hydrogen production power cabinet.

10. The hydrogen production power supply cabinet according to any one of claims 1 to 3, characterized in that, The shared unit cabinet (1) and each conversion unit cabinet (2) include a door panel (27) that is non-removably hinged to the frame (26) of the corresponding unit cabinet or detachably hung on the frame of the corresponding unit cabinet.

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