Power converter

Abstract

The application discloses a power converter, comprising: a first cabinet body provided with a first air duct and a second air duct; the second air duct is isolated from the first air duct; the first air duct comprises a power module and extends along a first direction; the first cabinet body has a first bottom end and a first top end along the first direction; the second air duct has a first air inlet and a first air outlet, and the first air inlet and the first air outlet are both communicated with an external environment of the first cabinet body; the second air duct extends from the first bottom end to the first top end, the first air inlet is located at the first bottom end, and the first air outlet is arranged close to the first top end. In the power converter, the distance between the first air outlet and the first air inlet along the first direction can be increased, the probability of backflow of hot air from the first air outlet to the air inlet can be reduced, the heat dissipation efficiency of the second air duct can be improved, and the heat dissipation efficiency of the whole power converter can be improved.

Description

Technical Field

[0001] This application relates to the field of power electronics technology, and more specifically, to a power converter. Background Technology

[0002] Power converters typically incorporate cooling ducts with inlets and outlets, both of which are connected to the external environment. While these ducts allow for air cooling, the overall cooling efficiency of power converters still needs improvement. Utility Model Content

[0003] In view of this, this application provides a power converter to improve the heat dissipation efficiency of the power converter.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A power converter includes: a first cabinet, the first cabinet being provided with a first air duct and a second air duct, the first air duct and the second air duct being isolated from each other;

[0006] The first air duct accommodates a power module and extends along a first direction; the first cabinet has a first bottom end and a first top end along the first direction; the second air duct has a first air inlet and a first air outlet, both of which are connected to the external environment of the first cabinet; the second air duct extends from the first bottom end to the first top end, the first air inlet is located at the first bottom end, and the first air outlet is located near the first top end.

[0007] In the power converter provided in this application, the first cabinet has a first air duct and a second air duct. The air from the external environment flows through the second air duct through the first air inlet and the first air outlet to achieve air cooling of the power converter. Since the second air duct extends from the first bottom end to the first top end of the first cabinet, the first air inlet is located at the first bottom end, and the first air outlet is located close to the first top end. This increases the distance between the first air outlet and the first air inlet along the first direction, which reduces the probability of hot air discharged from the first air outlet flowing back to the first air inlet. This improves the heat dissipation efficiency of the second air duct, and thus improves the heat dissipation efficiency of the entire power converter. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0009] Figure 1a This is a schematic diagram of a power converter provided in an embodiment of this application;

[0010] Figure 1b for Figure 1a The diagram shows the internal structure of the power converter.

[0011] Figure 2 for Figure 1b The top view of the power converter shown;

[0012] Figure 3 for Figure 1b The diagram shows a power converter in which the air inlet is located on one side of the first cabinet along the third direction.

[0013] Figure 4 This is another schematic diagram of the power converter provided in the embodiments of this application;

[0014] Figure 5 Another top view of the power converter provided in the embodiments of this application;

[0015] Figure 6a for Figure 4 The diagram shows the internal structure of the power converter along one side of the second direction.

[0016] Figure 6b for Figure 1b The diagram shown is a structural schematic of the air-to-air heat exchanger in the power converter.

[0017] Figure 7 for Figure 4 The diagram shows the internal structure of the power converter on the other side of the second direction.

[0018] Figure 8 for Figure 4 The diagram shows a side-by-side arrangement of power converters.

[0019] Figure 9 This is another schematic diagram of the power converter provided in the embodiments of this application;

[0020] Figure 10 This is another schematic diagram of the power converter provided in the embodiments of this application;

[0021] Figure 11a for Figure 9 The diagram shows the internal structure of the power converter.

[0022] Figure 11b for Figure 9 The diagram shows the internal structure of the power converter along one side of the second direction.

[0023] Figure 11c for Figure 13 The diagram shows the internal structure of the second cabinet in the power converter.

[0024] Figure 12a for Figure 10 The diagram shows the internal structure of the power converter.

[0025] Figure 12b for Figure 10 The diagram shows the internal structure of the power converter along the third direction.

[0026] Figure 12c for Figure 10 The diagram shows the internal structure of the power converter along one side of the second direction.

[0027] Figure 13 This is another schematic diagram of the power converter provided in the embodiments of this application;

[0028] Figure 14 This is another schematic diagram of the power converter provided in the embodiments of this application;

[0029] Figure 15a This is another schematic diagram of the power converter provided in the embodiments of this application;

[0030] Figure 15b for Figure 11c Side view of the structure shown;

[0031] Figure 16 for Figure 15a The diagram shows the internal structure of the power converter.

[0032] Figure 17 for Figure 16 The diagram shows the internal structure of the power converter along one side of the second direction.

[0033] Figure 18a This is another schematic diagram of the power converter provided in the embodiments of this application;

[0034] Figure 18b for Figure 18a The diagram shows the internal structure of the power converter along one side of the second direction.

[0035] Figure 19 This is a schematic diagram of a hollow liquid heat exchanger in a power converter provided in an embodiment of this application. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” “the,” “the,” “the,” and “this” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, “one or more” means one, two, or more; “and / or” describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character “ / ” generally indicates that the preceding and following related objects are in an “or” relationship.

[0038] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0039] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0040] The terms "parallel" and "perpendicular" used in this application refer to "basically parallel" and "basically perpendicular" in practical operation. "Basically parallel" can be understood as parallelism with a certain degree of error, and similarly, "basically perpendicular" can be understood as perpendicularity with a certain degree of error.

[0041] Power converters are typically equipped with a heat dissipation duct, which has an air inlet and an air outlet. Both the air inlet and the air outlet are connected to the external environment of the power converter. The air outlet is close to the air inlet, and the hot air discharged from the air outlet is more likely to flow back to the air inlet, affecting the heat dissipation efficiency of the heat dissipation duct and thus requiring improvement in the overall heat dissipation efficiency of the power converter.

[0042] To address the aforementioned issues, this application provides a power converter to improve its heat dissipation efficiency.

[0043] Please refer to Figure 1a The power converter 100 provided in this application embodiment includes a first cabinet 1.

[0044] The first cabinet 1 is placed along a first direction, and the first cabinet 1 has a first bottom end 1a and a first top end 1b in the first direction. It can be understood that the power converter 100 is in use, and the first direction is the vertical direction.

[0045] The first cabinet 1 is formed by multiple cabinet panels 105. For example, as shown... Figure 1a As shown, the first cabinet 1 is rectangular in shape and can be formed by enclosing six cabinet panels 105; as Figure 4 As shown, the first cabinet 1 can be formed by five cabinet panels 105. One cabinet panel 105 is perpendicular to a first direction, two cabinet panels 105 are perpendicular to a third direction, and two cabinet panels 105 are perpendicular to a second direction. One end of each cabinet panel 105 perpendicular to the third direction is connected to a cabinet panel 105 perpendicular to the first direction, and the other end of each cabinet panel 105 perpendicular to the third direction is connected to the second cabinet 16 mentioned later. One end of each cabinet panel 105 perpendicular to the second direction is connected to a cabinet panel 105 perpendicular to the first direction, and the other end of each cabinet panel 105 perpendicular to the second direction is connected to the second cabinet 16 mentioned later. The first, second, and third directions are all perpendicular to each other.

[0046] Please refer to Figure 1b The first cabinet 1 is provided with a first air duct 101 and a second air duct 102, and the first air duct 101 and the second air duct 102 are isolated from each other.

[0047] The first air duct 101 accommodates the power module 2 and extends along a first direction.

[0048] In some embodiments, the first air duct 101 includes a power air duct section 1011 and a power distribution air duct section 1012, wherein the power air duct section 1011 accommodates a power module ( Figure 1b Not shown), the power distribution duct section 1012 houses the power distribution components ( Figure 1b(Not shown). The power duct section 1011 and the power distribution duct section 1012 are distributed and connected along the first direction. The power distribution duct section 1012 extends to the first bottom end 1a of the first cabinet 1 along the first direction, and the power duct section 1011 extends to the first top end 1b of the first cabinet 1 along the first direction.

[0049] like Figure 13 As shown, the power distribution assembly 14 includes a DC power distribution assembly 1401 and an AC power distribution assembly 1402. The DC power distribution assembly 1401 is electrically connected to the power module 2, and the AC power distribution assembly 1402 can be electrically connected to the power module 2 through the reactor 6.

[0050] It is understandable that the first air duct 101 can be a sealed cavity so that the protection level of the first air duct 101 meets the protection requirements of the power module.

[0051] In practice, the power duct section 1011 can also accommodate other devices, for example, such as Figure 13 As shown, the power duct section 1011 can also accommodate an AC capacitor assembly 11.

[0052] The second air duct 102 can accommodate the reactor 6 and other electronic components.

[0053] The second air duct 102 has a first air inlet 1021 and a first air outlet 1022, both of which are connected to the external environment of the first cabinet 1. Thus, air from the external environment flows through the first air inlet 1021 and the first air outlet 1022 into the second air duct 102, achieving air cooling of the second air duct 102 and the components within it.

[0054] The second air duct 102 extends from the first bottom end 1a to the first top end 1b, the first air inlet 1021 is located at the first bottom end 1a, and the first air outlet 1022 is located near the first top end 1b. For example, the first air outlet 1022 is closer to the first top end 1b in the first direction than the power distribution air duct section 1012.

[0055] It should be noted that, Figure 1b The thick solid arrow indicates the direction of airflow through the second air duct 102. Figure 1b The medium-thick dashed arrow indicates the direction of airflow through the first air duct 101, which is only an example. Figures 3-7 , Figure 15b , Figure 14 That is also true.

[0056] In the power converter 100 provided in this application embodiment, the second air duct 102 extends from the first bottom end 1a to the first top end 1b. The first air inlet 1021 is located at the first bottom end 1a, and the first air outlet 1022 is located close to the first top end 1b. This can increase the distance between the first air outlet 1022 and the first air inlet 1021 along the first direction, and reduce the probability of hot air discharged from the first air outlet 1022 flowing back to the first air inlet 1021. This can improve the heat dissipation efficiency of the second air duct 102, and thus improve the heat dissipation efficiency of the entire power converter 100.

[0057] In this embodiment, the first bottom end 1a of the first cabinet 1 is placed on the ground or other mounting surface, which affects air intake. To reduce the impact on air intake, such as... Figure 1a and Figure 2 As shown, the first cabinet 1 is provided with a support leg 9 at its first bottom end 1a in the first direction. There are at least two support legs 9 and they are distributed around the first air inlet 1021.

[0058] For example, there can be four support legs 9, located at the four top corners of the first bottom end 1a of the first cabinet body 1. Of course, there can also be two, three or other numbers of support legs 9, and this embodiment of the application does not limit this.

[0059] In the above structure, by setting the support leg 9, the bottom of the power converter 100 can draw air from all sides; at the same time, when multiple power converters 100 are connected in parallel, they adopt a method of large-area contact with each other. When connected in parallel, there may be air-stealing phenomenon at the bottom. The support leg 9 can also expand the air intake space of the power converter 100 when connected in parallel, reducing the impact of air-stealing.

[0060] A first fan 8 can be installed inside the second air duct 102 to drive the air from the external environment to flow through the second air duct 102, which helps to improve the heat dissipation efficiency of the second air duct 102.

[0061] In this embodiment of the application, in order to improve the heat dissipation effect of the first air duct 101, especially the heat dissipation effect of the AC power distribution component 1402 and the DC power distribution component 1401, the heat dissipation of the first air duct 101 and the heat dissipation of the second air duct 102 can be coupled. For example... Figure 1b As shown, in some embodiments, an air-to-air heat exchanger 7 and a first fan 8 are provided in the second air duct 102; the first air inlet 1021, the air-to-air heat exchanger 7, the reactor 6 and the first air outlet 1022 are distributed along the airflow direction in the second air duct 102.

[0062] like Figure 6b As shown, the air-to-air heat exchanger 7 has a first heat exchange channel 701 and a second heat exchange channel 702 that can exchange heat with the first heat exchange channel 701.

[0063] Combination Figure 1band Figure 6b The first heat exchange channel 701 is connected to the first air duct 101, and the second heat exchange channel 702 is connected to the second air duct 102. Thus, cold air enters the second air duct 102 from the first air inlet 1021 under the action of the first fan 8. After flowing through the second heat exchange channel 702 and the reactor 6, the cold air forms hot air which is discharged from the second air duct 102 from the first air outlet 1022. The cold air flowing through the second heat exchange channel 702 and the hot air flowing through the first heat exchange channel 701 exchange heat, achieving cooling of the air in the first air duct 101. The cooled air in the first air duct 101 flows through the electronic components (power module 2 and power distribution assembly 14, etc.) in the first air duct 101 and then returns to the first heat exchange channel 701, forming an internal circulation.

[0064] In the above embodiments, heat dissipation coupling between the first air duct 101 and the second air duct 102 is achieved, which can improve the heat dissipation effect of the first air duct 101.

[0065] The temperature of reactor 6 is relatively high, such as Figure 1b As shown, in order to improve the cooling effect on the air in the first air duct 101, the air-to-air heat exchanger 7 is distributed between the first air inlet 1021 and the reactor 6 along the airflow direction in the second air duct 102.

[0066] Continue to refer to Figure 1b Along the airflow direction within the second air duct 102, the first fan 8 can be positioned between the air-to-air heat exchanger 7 and the reactor 6. Alternatively, along the airflow direction within the second air duct 102, the first fan 8 can also be positioned between the first air inlet 1021 and the air-to-air heat exchanger 7, or the first fan 8 can also be positioned between the reactor 6 and the first air outlet 1022.

[0067] The first fan 8 is located between the air-to-air heat exchanger 7 and the reactor 6. Compared with the first fan 8 located between the first air inlet 1021 and the air-to-air heat exchanger 7, the first fan 8 has a smaller load and lower air resistance.

[0068] The first fan 8 is located between the air-to-air heat exchanger 7 and the reactor 6. Compared to the first fan 8 being located between the reactor 6 and the first air outlet 1022, the air flowing through the first fan 8 is cold air, and the lifespan of the first fan 8 can be longer.

[0069] The first fan 8 is positioned between the air-to-air heat exchanger 7 and the reactor 6. In this way, the air entering from the first air inlet 1021 first flows through the second heat exchange channel 702 of the air-to-air heat exchanger 7, and then flows through the first fan 8. Some of the sand and gravel entering from the first air inlet 1021 can be blocked by the air-to-air heat exchanger 7, reducing the wear and tear on the first fan 8. The air-to-air heat exchanger 7 has the function of protecting the first fan 8.

[0070] The type of air-to-air heat exchanger 7 is selected according to the actual situation. For example, the air-to-air heat exchanger 7 may include multiple flat tubes arranged side-by-side (not shown in the figure), with fins (not shown in the figure) disposed between adjacent flat tubes. The flat tubes may form a first heat exchange channel 701; the fins may form a second heat exchange channel 702; the first heat exchange channel 701 and the second heat exchange channel 702 may exchange heat in an alternating manner. Alternatively, the flat tubes may form the second heat exchange channel 702; the fins may form the first heat exchange channel 701.

[0071] To facilitate airflow through the first air duct 101, such as Figure 13 As shown, a second fan 15 can be installed in the first air duct 101, and the second fan 15 is located within the power air duct section 1011; as Figure 18a As shown, a second fan 15 can be installed in the first air duct 101, and the second fan 15 is located within the power distribution air duct section 1012. Of course, both the power air duct section 1011 and the power distribution air duct section 1012 can be equipped with a second fan 15.

[0072] The number and location of the second fan 15 are selected based on the actual situation and are not limited to this. Figure 13 and Figure 18a The location of the second fan 15 is shown.

[0073] Please refer to Figure 1b In some embodiments, the air-to-air heat exchanger 7 is a single unit.

[0074] like Figure 18a and Figure 18b As shown, in some other embodiments, there are at least two air-to-air heat exchangers 7, and they are spaced apart along a second or third direction. For example, as Figure 18a As shown, there are four air-to-air heat exchangers 7, which are spaced apart along the second direction. In practice, there can also be two, three, or five or more (including five) air-to-air heat exchangers 7, all of which are spaced apart along the second direction. In practice, the air-to-air heat exchangers 7 can also be spaced apart along a third direction, and are not limited to the second direction.

[0075] In the above embodiment, the gap between two adjacent air-to-air heat exchangers 7 forms part of the air duct inside the second air duct 102, which can increase the heat exchange area between the air inside the second air duct 102 and the air-to-air heat exchanger 7, thereby improving the heat exchange effect.

[0076] In practice, the heat exchange area between the air and the air-to-air heat exchanger 7 in the second air duct 102 can also be increased through other methods, and is not limited to these. Figure 18a The structure shown.

[0077] like Figure 3As shown, the first air outlet 1022 is located on one side of the first cabinet 1 along a third direction; or the first air outlet 1022 is located on one side of the first cabinet 1 along a second direction. It can be understood that the cabinet panel 105 where the first air outlet 1022 is located is parallel to the first direction. This reduces the impact of the airflow on the first top edge 1b of the first cabinet 1, facilitating other designs on the first top edge 1b, such as placing the second cabinet 16.

[0078] For example, such as Figure 8 As shown, the first air outlet 1022 is distributed on one side of the first cabinet 1 in the third direction. The cabinet plate 105 where the first air outlet 1022 is located is parallel to the second direction and perpendicular to the third direction. Multiple power converters 100 can be arranged side by side along the second direction.

[0079] For example, the first air outlet 1022 is distributed on one side of the first cabinet 1 in the second direction, and the cabinet panel 105 where the first air outlet 1022 is located is parallel to the third direction and perpendicular to the second direction. Multiple power converters 100 can be arranged side by side along the third direction.

[0080] In the above embodiment, the heat discharged from the first air outlet 1022 can easily enter the first air inlet 1021 located at the first bottom end 1a, resulting in hot air recirculation and a heat island effect, which affects the heat dissipation effect. In addition, with multiple power converters 100 arranged side by side, there may be a situation where the air outlet of one power converter 100 blows against the air outlet of another power converter 100, which is not conducive to the side-by-side arrangement of power converters 100.

[0081] To reduce hot air recirculation and avoid cross-flow issues between power converters, please refer to... Figure 1b The first air outlet 1022 can be located at the first top 1b. This increases the distance between the first air outlet 1022 and the first air inlet 1021. Moreover, the first air outlet 1022 is away from the first air inlet 1021 along the first direction, which effectively reduces the hot air return flow, avoids the heat island effect, and helps to improve the heat dissipation effect; it can also avoid the problem of back-blowing between energy storage converters.

[0082] In this embodiment, the reactor 6 is relatively heavy. To improve the stability of the power converter 100, the reactor 6 is placed at a lower position, below the power module 2. In some embodiments, such as Figure 2As shown, the second air duct 102 includes a reactor air duct section 1023 and a first cooling air duct section 1024. The reactor air duct section 1023 houses the reactor 6. The first cooling air duct section 1024 and the reactor air duct section 1023 are distributed and connected along a first direction. The first air inlet 1021 is located in the reactor air duct section 1023, and the first air outlet 1022 is located in the first cooling air duct section 1024. In this way, the installation position of the reactor 6 is clearly defined, which is convenient for installing the reactor 6. The position of the first air outlet 1022 is also clearly defined, which is convenient for setting the first air outlet 1022 and also makes it convenient to meet the requirement that the first air outlet 1022 is located close to the first top 1b. The first cooling air duct section 1024 can be located above the first cooling air duct section 1023 in the first direction, for example, directly above or offset above. This arrangement can lower the center of the entire device. In order to meet diverse needs, the electric reactor air duct section 1023 can be located above the first cooling air duct section 1024 in the first direction, for example, directly above or offset above.

[0083] To simplify the structure of the first cabinet 1, the reactor air duct section 1023 and the power distribution air duct section 1012 can be arranged flush along the first direction, and the first cooling air duct section 1024 and the power air duct section 1011 can be arranged flush along the first direction. It is understood that the bottom ends of the reactor air duct section 1023 and the power distribution air duct section 1012 along the first direction are flush, as are the top ends of the reactor air duct section 1023 and the power distribution air duct section 1012 along the first direction; the bottom ends of the first cooling air duct section 1024 and the power air duct section 1011 along the first direction are flush, and the top ends of the first cooling air duct section 1024 and the power air duct section 1011 along the first direction are also flush.

[0084] Of course, it is also possible for the reactor air duct section 1023 and the power distribution air duct section 1012 to be staggered along the first direction, and for the first cooling air duct section 1024 and the power air duct section 1011 to be staggered along the first direction.

[0085] like Figure 2 and Figure 5 As shown, the first air outlet 1022 is located at the first top 1b, and the first cooling air duct section 1024 and the electric reactor air duct section 1023 are distributed along the first direction and connected through the connecting port 02.

[0086] It should be noted that, Figure 2 and Figure 5 In the diagram, the area marked with a slash represents the connection port 02. The connection port 02 can be understood as at least a portion of the inlet of the first cooling air duct section 1024.

[0087] like Figure 2As shown, the projections of the first air outlet 1022 along the first direction and the projections of the connecting port 02 along the first direction have overlapping portions. For example, the portions of the projections of the first air outlet 1022 along the first direction and the portions of the projections of the connecting port 02 along the first direction overlap, or the portions of the projections of the first air outlet 1022 along the first direction and the projections of the connecting port 02 along the first direction overlap, or the portions of the projections of the first air outlet 1022 along the first direction and the projections of the connecting port 02 along the first direction overlap, or the portions of the projections of the first air outlet 1022 along the first direction and the projections of the connecting port 02 along the first direction overlap.

[0088] In the above structure, the air discharged from the connecting port 02 can flow directly to the first air outlet 1022 in the first direction, which can reduce the wind resistance in the second air duct 102 and facilitate the flow of air through the second air duct 102.

[0089] In the embodiment where the first air outlet 1022 is located at the first top 1b, rain and snow may backflow during rainy or snowy weather, affecting the service life of the power converter 100. Figure 5 As shown, to reduce the probability of rain and snow backflow, the projections of the first air outlet 1022 along the first direction and the projections of the connecting port 02 along the first direction are spaced apart. This way, water entering the second air duct 102 from the first air outlet 102 will not directly enter the connecting port 02, reducing the degree of backflow and meeting the requirement of a high protection level for the power converter 100. It can be understood that the spaced distribution of the projections of 1022 and the connecting port 02 along the first direction means that the projection of the first air outlet 1022 along the first direction does not overlap with the projection of the connecting port 02 along the first direction.

[0090] In some embodiments, such as Figure 18a As shown, the reactor air duct section 1023 extends along the second direction to both sides of the first cabinet 1, and the power distribution air duct section 1012 is distributed on both sides of the reactor air duct section 1023 along the third direction. In this way, the second air duct 102 is enlarged, which is beneficial to improving the heat dissipation effect of the reactor 6; it is also convenient to maintain the components inside the second air duct 102; and it can make full use of the cabinet panel 105 of the first cabinet 1, thereby reducing the cost of the first cabinet 1.

[0091] In the above structure, the power distribution duct section 1012 located on both sides of the reactance duct section 1023 can be connected through the power duct section 1011; or, the power distribution duct section 1012 located on both sides of the reactance duct section 1023 can be connected through the power duct section 1011 and through the air-to-air heat exchanger 7 mentioned later.

[0092] In this embodiment, the portion of the power distribution duct section 1012 located on the third-direction side of the second duct 102 can accommodate the DC power distribution component 1401, and the portion of the power distribution duct section 1012 located on the third-direction side of the second duct 102 can accommodate the AC power distribution component 1402. This facilitates the layout and wiring of the AC and DC sides of the power converter 100.

[0093] In practice, the reactor ventilation duct section 1023 and the power distribution ventilation duct section 1012 also have other distribution structures. In some embodiments, such as Figure 16 As shown, the power distribution duct section 1012 surrounds the outside of the reactor duct section 1023. It can be understood that the power distribution duct section 1012 is distributed on both sides of the second duct 102 in the third direction and on both sides of the second duct 102 in the second direction. This increases the size of the power distribution duct section 1012, thereby increasing the size of the first duct 101 and improving its heat dissipation effect. In other embodiments, the reactor duct section 1023 extends along the second direction to one side of the first cabinet 1, and the power distribution duct section 1012 is distributed on both sides of the reactor duct section 1023 in the third direction and on one side of the reactor duct section 1023 in the second direction. This also increases the size of the power distribution duct section 1012, thereby increasing the size of the first duct 101 and improving its heat dissipation effect.

[0094] In the power converter 100, the power module 2 within the first air duct 101 can be cooled by a finned heat sink. In some embodiments, the power converter 100 further includes a finned heat sink, at least a portion of which is located outside the first air duct 101. The finned heat sink and the power module 2 can be in contact for heat exchange to achieve heat dissipation for the power module 2.

[0095] Finned heat sinks can also be combined with other heat dissipation methods, such as finned heat sinks being heat pipe heat sinks, etc. The embodiments of this application do not limit the type of finned heat sink.

[0096] In practice, power module 2 can also be cooled by liquid cooling to improve its heat dissipation performance. In some embodiments, combined with Figure 4 and Figure 6a As shown, the power converter 100 also includes a liquid cooling unit 5 and a liquid cooling plate 3; as Figure 7 As shown, the first side plate 3a of the liquid cooling plate 3 and the power module 2 are arranged for heat exchange; as Figure 6a As shown, the second side plate 3b of the liquid cooling plate 3 is connected to the liquid cooling unit 5 through the pipe assembly 4 to form a circuit, and the liquid cooling unit 5 cools the coolant in the circuit. In this way, the power module 2 can be liquid cooled, which is beneficial to improving the heat dissipation effect of the power module 2, thereby improving the heat dissipation effect of the entire power converter 100.

[0097] It should be noted that, Figure 4 and Figure 6a The location of the liquid cooling unit 5 is shown exemplarily, but the connection between the liquid cooling unit 5 and the pipe assembly 4 is not shown, nor is the specific structure of the liquid cooling unit 5 shown. The second side plate 3b and the first side plate 3a of the liquid cooling plate 3 can be arranged opposite each other in a direction perpendicular to the liquid cooling plate 3; or, the second side plate 3b and the first side plate 3a of the liquid cooling plate 3 can be arranged adjacent to each other.

[0098] In the above embodiments, the first side plate 3a of the liquid cooling plate 3 and the power module 2 can be fitted together for heat exchange. In order to ensure that the liquid cooling plate 3 and the power module 2 are fitted together for heat exchange, at least a portion of the first air duct 101 is located on the side where the first side plate 3a is located.

[0099] In the above embodiment, the coolant flows through the liquid cooling plate 3 and exchanges heat with the power module 2. The coolant can absorb the heat from the power module 2. The coolant flowing through the liquid cooling plate 3 flows back to the liquid cooling unit 5, where the liquid cooling unit 5 cools the coolant. The cooled coolant then enters the liquid cooling plate 3, thus achieving circulation.

[0100] As shown in Figure 11, the liquid cooling unit 5 includes an air-liquid heat exchanger 501 and a transfer pump 502. Air flowing through the air-liquid heat exchanger 501 can cool the coolant inside the air-liquid heat exchanger 501, and the transfer pump 502 can be connected in series with the pipe assembly 4.

[0101] The liquid cooling unit 5 can be located outside the first cabinet 1 or inside the first cabinet 1.

[0102] The following describes an embodiment in which the liquid cooling unit 5 is located outside the first cabinet 1.

[0103] refer to Figure 6a In some embodiments, the power converter 100 further includes a second cabinet 16 located outside the first cabinet 1. The second cabinet 16 is provided with a heat dissipation duct 1601, which houses the air-liquid heat exchanger 501 of the liquid-cooled unit 5. The heat dissipation duct 1601 has an inlet 16011 and an outlet 16012, both of which are connected to the external environment. It can be understood that the external environment refers to the external environment of the power converter 100.

[0104] The location of import 16011 and export 16012 can be selected according to the actual situation, and this application embodiment does not limit this.

[0105] In the above embodiments, it is convenient to set up the liquid cooling unit 5, and the liquid cooling unit 5 is located outside the first cabinet 1, which can reduce the impact of the leaked coolant from the liquid cooling unit 5 on electronic components such as the power module 2 and the power distribution component 14 inside the first cabinet 1.

[0106] In the above embodiments, to facilitate airflow through the heat dissipation duct 1601, the liquid cooling unit 5 further includes a third fan 505, which can be located within the heat dissipation duct 1601. The location of the third fan 505 can be selected based on actual conditions, and this application embodiment does not limit this.

[0107] The relative positions of the second cabinet 16 and the first cabinet 1 are designed according to the actual situation.

[0108] like Figure 4 As shown, in some embodiments, the second cabinet 16 and the first cabinet 1 are distributed along a first direction, and the second cabinet 16 is disposed at the first top of the first cabinet 1. Figure 4 (Not marked in the text).

[0109] It is understood that the second cabinet 16 has a second bottom end 16a and a second top end 16b along the first direction, with the second bottom end 16a being closer to the first cabinet 1 along the first direction than the second top end 16b. Figure 4 The position of the first top of the first cabinet 1 can be referenced. Figure 4 The position of the second bottom end 16a.

[0110] In the above embodiments, when the first direction is vertical, the liquid cooling unit 5 can be higher than the first cabinet 1. The first cabinet 1 bears the pressure of the liquid cooling unit 5 and the second cabinet 16, so that the liquid cooling unit 5 does not have to bear the pressure of the first cabinet 1 and other electronic components, reducing the probability of the liquid cooling unit 5 being damaged due to pressure; it also helps to lower the center of gravity of the entire power converter 100, which can improve the stability of the entire power converter 100.

[0111] The second cabinet 16 may be in the shape of a cuboid or other shapes, and this application embodiment does not limit this.

[0112] like Figure 4 As shown, the first air outlet 1022 can be located on one side of the first cabinet 1 along a third direction. Of course, the first air outlet 1022 can also be located on one side of the first cabinet 1 along a second direction.

[0113] To further reduce the chance of hot air recirculation, such as Figure 9 and Figure 10 As shown, the second cabinet 16 and the first cabinet 1 are distributed along the first direction, and the second cabinet 16 is located at the first top of the first cabinet 1. Figure 9 and Figure 10 Not shown), first air outlet ( Figure 9 and Figure 11a (Not shown) Located at the very top. (As shown) Figure 11aAs shown, the second cabinet 16 is provided with a second cooling air duct section 1602, which is isolated from the heat dissipation air duct 1601. The second cooling air duct section 1602 has a second air inlet 16021 and a second air outlet 16022. The second air inlet 16021 of the second cooling air duct section 1602 is connected to the first air outlet. The second air outlet 16022 of the second cooling air duct section 1602 is connected to the external environment of the power converter. The second air outlet 16022 is located at the second top 16b of the second cabinet 16 away from the first cabinet 1 along the first direction. In this way, the distance between the first air outlet 1022 and the first air inlet 1021 can be further increased. Moreover, the first air outlet 1022 is away from the first air inlet 1021 along the first direction, which can effectively reduce the probability and volume of hot air recirculation, avoid the heat island effect, and improve the heat dissipation effect. It can also avoid the problem of backflow between power converters.

[0114] In some other embodiments, the first air outlet 1022 may be located on one side of the second cabinet 16 along the second direction, or the first air outlet 1022 may be located on one side of the second cabinet 16 along the third direction, which may also increase the distance between the first air outlet 1022 and the first air inlet 1021.

[0115] The size of the second cooling air duct section 1602 and its specific location in the second cabinet 16 can be selected according to the actual situation, and this application embodiment does not limit this.

[0116] Combination Figure 11a and Figure 11b As shown, the projections of the second air inlet 16021 along the first direction and the second air outlet 16022 along the first direction overlap. This helps to reduce wind resistance and facilitates airflow through the second cooling duct section 1602.

[0117] For example, the projections of the second air inlet 16021 along the first direction and the projections of the second air outlet 16022 along the first direction overlap; or, the projections of the second air inlet 16021 along the first direction and the projections of the second air outlet 16022 along the first direction overlap; or, the projections of the second air inlet 16021 along the first direction and the projections of the second air outlet 16022 along the first direction overlap; or, the projections of the second air inlet 16021 along the first direction and the projections of the second air outlet 16022 along the first direction overlap.

[0118] Combination Figure 12a and Figure 12bThe projections of the second air inlet 16021 along the first direction and the second air outlet 16022 along the first direction are spaced apart. This can be understood as follows: the projections of the second air inlet 16021 along the first direction do not overlap with the projections of the second air outlet 16022 along the first direction. In this way, water entering the second cooling duct section 1602 from the second air outlet 16022 will not directly enter the second air inlet 16021, reducing backflow and meeting the requirement of a high protection level for the power converter 100.

[0119] To further mitigate the backflow, combined with Figure 12b and Figure 12c As shown, the power converter 100 also includes a guide member 12, which is provided with an air guide port 1201. An angle is provided between the axial direction of the air guide port 1201 and the axial direction of the second air inlet 16021.

[0120] For example, the angle between the axial direction of the air guide 1201 and the axial direction of the second air inlet 16021 is a right angle, which can be understood as: the axial direction of the air guide 1201 is perpendicular to the axial direction of the second air inlet 16021; or, the angle between the axial direction of the air guide 1201 and the axial direction of the second air inlet 16021 is an acute angle, which can be understood as: the axial direction of the air guide 1201 and the axial direction of the second air inlet 16021 are relatively inclined.

[0121] In the above structure, by setting the guide member 12, the corner of the air duct is increased, which can effectively reduce the degree of backflow. Moreover, the air guide 1201 has a top edge and a bottom edge along the first direction, and the bottom end of the guide member 12 along the first direction and the bottom edge of the air guide 1201 are at a preset distance along the first direction, so that the bottom end of the guide member 12 along the first direction and the guide member 12 can form a water storage tank. The water entering the second cooling air duct section 1602 can be stored in the water storage tank, which can further reduce the amount of water entering the first cooling air duct section 1024.

[0122] In some embodiments, combined with Figure 12b and Figure 12c As shown, with the projections of the second air inlet 16021 along the first direction and the second air outlet 16022 along the first direction spaced apart, the guide member 12 can be a guide plate. The guide plate divides the second cooling air duct section 1602 into two parts. One part of the second cooling air duct section 1602 is connected to the second air inlet 16021, and the other part of the second cooling air duct section 1602 is connected to the second air outlet 16022. It can be understood that the guide plate is distributed between the second air inlet 16021 and the second air outlet 16022.

[0123] In other embodiments, combined with Figure 13 and Figure 11cAs shown, the guide member 12 can be a guide cylinder, which covers the periphery of the second air inlet 16021. This embodiment can be applied to situations where the projections of the second air inlet 16021 along the first direction and the projections of the second air outlet 16022 along the first direction are spaced apart, and it can also be applied to situations where the projections of the second air inlet 16021 along the first direction and the projections of the second air outlet 16022 along the first direction overlap.

[0124] In the above embodiments, when the second air inlet 16021 and the second air outlet 16022 are distributed along the second direction, the air guide 1201 can be located on the side of the guide member 12 along the second direction close to the second air outlet 16022 in order to facilitate air outlet; when the second air inlet 16021 and the second air outlet 16022 are distributed along the third direction, the air guide 1201 can be located on the side of the guide member 12 along the third direction close to the second air outlet 16022 in order to facilitate air outlet.

[0125] In this embodiment of the application, the degree of water backflow can also be reduced through other methods. Please refer to... Figure 11c and Figure 15b The power converter 100 also includes a flow guide 13, which is disposed within the second air outlet 16022. There are at least two flow guides 13. The flow guides 13 can be parallel to the first direction; or, the flow guides 13 can be inclined relative to the first direction, with the end of the flow guide 13 furthest from the second air outlet 16022 also furthest from the second air inlet 16021. This allows water to flow along the flow guides 13, reducing the probability of water entering the second air inlet 16021, thereby reducing backflow and meeting the requirement of a high protection level for the power converter 100.

[0126] Please refer to Figure 15b In at least two guide elements 13, the length of the guide element 13 closer to the air vent 1201 along the first direction is greater than the length of the guide element 13 farther from the air vent 1201 along the first direction.

[0127] It should be noted that the guide element 13 near the air vent 1201 refers to the guide element 13 that is close to the air vent 1201 along the distribution direction of the second air outlet 16022, the air vent 1201 and the second air inlet 16021; the guide element 13 away from the connecting port 02 refers to the guide element 13 that is away from the connecting port 02 along the distribution direction of the first air outlet 1022 and the connecting port 02.

[0128] For example, the distribution direction of the second air outlet 16022, the air guide 1201 and the second air inlet 16021 can be a second direction, and all the guide components 13 can be arranged along the second direction; the distribution direction of the second air outlet 16022, the air guide 1201 and the second air inlet 16021 can be a third direction, and all the guide components 13 can be arranged along the third direction.

[0129] In the above structure, the guide member 13 near the air vent 1201 is longer and has a better water blocking effect, which can further reduce the backflow of water and make it easier to meet the requirement that the power converter 100 has a higher protection level.

[0130] For example, such as Figure 15b As shown, there are eight flow guides 13. Three flow guides 13 have unequal lengths along the first direction, and five flow guides 13 have equal lengths along the first direction. Of course, the lengths of all eight flow guides 13 along the first direction can be unequal. The flow guides 13 can also be two, three, or other types, and this embodiment does not limit this.

[0131] The flow guide 13 can be a flow guide plate or a flow guide block, etc. In order to reduce the impact on the air outlet, the flow guide 13 can be a flow guide plate.

[0132] In practice, embodiments of the power converter 100 including the guide member 12 and embodiments of the power converter 100 including the flow guide member 13 can be implemented individually or in combination. In the case of combined implementation, the power converter 100 including the guide member 12 and the flow guide member 13 can further reduce the degree of water backflow.

[0133] In this embodiment of the application, the embodiment that reduces the degree of water backflow can also reduce the probability of foreign objects such as snow entering the first cabinet 1.

[0134] In this application embodiment, the embodiment for reducing the degree of water backflow can also be applied to an embodiment where the power converter 100 includes a first cabinet 1 but does not include a second cabinet 16, and the first air outlet 1022 is located at the first top 1b. The specific positions of the guide member 12 and the flow guide member 13 can be adjusted adaptively.

[0135] The second cooling air duct section 1602 is located inside the second cabinet 16. The second cooling air duct section 1602 occupies space in the heat dissipation air duct 1601, reducing the space of the heat dissipation air duct 1601. This affects the volume of the air-liquid heat exchanger 501 within the heat dissipation air duct 1601, ultimately impacting the heat exchange effect. For example... Figure 13As shown, the air-liquid heat exchanger 501 is inclined relative to the first direction, and the two sides with the largest area in the air-liquid heat exchanger 501 are distributed along the first direction; one side of the air-liquid heat exchanger 501 along the first direction faces the inlet 16011, and the other side of the air-liquid heat exchanger 501 along the first direction faces the outlet 16012. In this way, the heat exchange area of ​​the air-liquid heat exchanger 501 can be increased, which is beneficial to improving the heat exchange effect and can reduce the impact of the second cooling air duct section 1602 on the heat exchange effect.

[0136] In the above embodiments, the arrangement of the air-liquid heat exchanger 501 can also be applied to embodiments where the second cooling air duct section 1602 is not inside the second cabinet 16.

[0137] In the above embodiments, the third fan 505 can be distributed between the inlet 16011 and the air-liquid heat exchanger 501, and the axial direction of the third fan 505 can be perpendicular to the first direction; or, the third fan 505 can be distributed between the outlet 16012 and the air-liquid heat exchanger 501, and the axial direction of the third fan 505 can be perpendicular to the first direction or parallel to the first direction.

[0138] In the embodiment where the second cooling air duct section 1602 is located within the second cabinet 16, in order to save space within the heat dissipation air duct 1601, such as Figure 13 As shown, the delivery pump 502 of the liquid cooling unit 5 is located in the second cooling air duct section 1602. This allows for more space to be reserved for the air-liquid heat exchanger 501, reducing the impact on the volume of the air-liquid heat exchanger 501 and thus reducing the impact on the heat exchange effect.

[0139] The embodiments of the inclined arrangement of the air-liquid heat exchanger 501 and the embodiment of the transfer pump 502 located in the second cooling air duct section 1602 can be implemented individually or in combination, depending on actual needs.

[0140] In this embodiment, the second cabinet 16 may also be located in other positions of the first cabinet 1. Please refer to... Figure 14 The second cabinet 16 can be located on one side of the first cabinet 1 along the second direction; or, the second cabinet 16 can also be located on one side of the first cabinet 1 along the third direction. This reduces the overall height of the power converter 100, which is beneficial for improving the stability of the entire power converter 100. In this embodiment, the first air outlet 1022 can be located at the first top end 1b of the first cabinet 1, or the first air outlet 1022 can be located on one side of the first cabinet 1 along the second or third direction.

[0141] The previous section described an embodiment where the liquid chiller unit 5 is located inside the second cabinet 16. The following section describes an embodiment where the liquid chiller unit 5 is located inside the first cabinet 1.

[0142] Combination Figure 15a and Figure 16 As shown, the liquid-cooled unit 5 is located within the second air duct 102, which houses an air-to-air heat exchanger 7 and a first fan 8. As previously described, the liquid-cooled unit 5 includes an air-to-liquid heat exchanger 501 and a transfer pump 502, with the transfer pump 502 connected in series to the pipe assembly 4. Along the airflow direction within the second air duct 102, the air-to-air heat exchanger 7 is located between the first air inlet 1021 and the first air outlet 1022, while the air-to-liquid heat exchanger 501 is located between the first air inlet 1021 and the first air outlet 1022. For a description of the air-to-air heat exchanger 7, please refer to the previous text. Figure 19 As shown, the air-liquid heat exchanger 501 has a third heat exchange channel 5011 and a fourth heat exchange channel 5012 that can exchange heat with the third heat exchange channel 5011. The third heat exchange channel 5011 is connected to the tube assembly 4, and the fourth heat exchange channel 5012 is connected to the second air duct 102.

[0143] In the above embodiment, the liquid cooling unit 5 is located inside the first cabinet 1, which can make full use of the space of the second air duct 102 and improve the structural compactness of the power converter.

[0144] In the above embodiment, the cold air in the second air duct 102 can cool the fourth heat exchange channel 5012 as it flows through the air-liquid heat exchanger 501, thereby dissipating heat from the coolant and ensuring heat dissipation for the power module 2.

[0145] Please refer to Figure 17 The first air inlet 1021, air-to-air heat exchanger 7, air-to-liquid heat exchanger 501, reactor 6, and first air outlet 1022 are distributed along the airflow direction within the second air duct 102. In this way, the cold air entering the second air duct 102 first exchanges heat with the air-to-air heat exchanger 7, which improves the heat dissipation effect on the first air duct 101. The airflow in the second air duct 102 flows through the air-to-liquid heat exchanger 501 and then through the reactor 6, reducing the impact of the high temperature of the reactor 6 on the coolant inside the air-to-liquid heat exchanger 501 and improving the cooling effect on the coolant.

[0146] Of course, the air-to-air heat exchanger 7, the reactor 6, and the air-to-liquid heat exchanger 501 can also be distributed along the airflow direction within the second air duct 102; or, the first air inlet 1021, the air-to-liquid heat exchanger 501, the air-to-air heat exchanger 7, the reactor 6, and the first air outlet 1022 can be distributed along the airflow direction within the second air duct 102.

[0147] In the above structure, the positions of the first air inlet 1021 and the first air outlet 1022 of the second air duct 102 can be referred to the previous text.

[0148] In the above embodiment, the liquid cooling plate 3 is closer to the first air outlet 1022 than the air-liquid heat exchanger 501 along the first direction. When the first direction is vertical, the liquid cooling plate 3 will be higher than the air-liquid heat exchanger 501, making it easier for gas to accumulate inside the liquid cooling plate 3, thus affecting the heat dissipation effect of the power module 2. (Continue to refer to...) Figure 17 To reduce the amount of gas inside the liquid-cooled plate 3, the liquid-cooled unit 5 also includes a liquid storage device 504. Along the first direction, at least a portion of the liquid storage device 504 is closer to the first air outlet 1022 than the liquid-cooled plate 3. It can be understood that, along the first direction, at least a portion of the liquid storage device 504 is located at the end of the liquid-cooled plate 3 furthest from the air-liquid heat exchanger 501. The liquid storage device 504 is connected to the pipe assembly 4 via a delivery pump 502, and is equipped with an exhaust structure 5041. In this way, gas in the coolant accumulates in the liquid storage device 504 and is discharged through the exhaust structure 5041, thereby reducing the probability of gas accumulation inside the liquid-cooled plate 3 and thus reducing the amount of gas inside the liquid-cooled plate 3. Simultaneously, the liquid storage device 504 can also be used to replenish the liquid in the liquid-cooled unit 5. In the event of a leak in the liquid-cooled unit 5, the liquid storage device 504 can replenish the liquid in the liquid-cooled plate 3, preventing the liquid-cooled plate 3 from burning dry.

[0149] The exhaust structure 5041 described above can be an exhaust valve or other exhaust components, and this application embodiment does not limit it.

[0150] For example, such as Figure 17 As shown, the liquid storage device 504 is connected to one pump inlet of the delivery pump 502 through the third connecting pipe 503. The first connecting pipe 401 includes a first pipe section 4011 and a second pipe section 4012. The first pipe section 4011 is connected to the other pump inlet of the delivery pump 502 and the air-liquid heat exchanger 501. The second pipe section 4012 is connected to the pump outlet of the delivery pump 502 and the liquid cooling plate 3.

[0151] In practice, the liquid storage device 504 can also be connected to the coolant circuit in other ways, and is not limited to these methods. Figure 17 As shown.

[0152] In this embodiment, the liquid-cooled plate 3 is connected to the air-liquid heat exchanger 501 of the liquid-cooled unit 5 via the pipe assembly 4. For example, as shown... Figure 17 As shown, the second side plate 3b of the liquid cooling plate 3 has a water inlet connector 301 and a water outlet connector 302. The water inlet connector 301 has a water inlet interface, and the water outlet connector 302 has a water outlet interface. The pipe assembly 4 includes a first connecting pipe 401 and a second connecting pipe 402. The water inlet interface of the water inlet connector 301 is connected to the first connecting pipe 401, and the water outlet interface of the water outlet connector 302 is connected to the second connecting pipe 402. The delivery pump 502 can be connected in series with either the first connecting pipe 401 or the second connecting pipe 402. This facilitates the connection between the liquid cooling plate 3 and the pipe assembly 4.

[0153] Continue to refer to Figure 17 The connection point 01 between the liquid cooling plate 3 and the pipe assembly 4 is located outside the first air duct 101. For example, the connection point between the water inlet and the first connecting pipe 401, and the connection point between the water outlet and the second connecting pipe 402 are all located outside the first air duct 101.

[0154] It should be noted that the connection point 01 between the liquid cooling plate 3 and the pipe assembly 4 can be understood as the connection point 01 between the liquid cooling plate 3 and the pipe assembly 4. The pipe assembly 4 is also located outside the first air duct 101; for example, both the first connecting pipe 401 and the second connecting pipe 402 are located outside the first air duct 101.

[0155] In the above embodiment, the leakage at the connection point 01 between the liquid cooling plate 3 and the pipe assembly 4 occurs outside the first air duct 101. Therefore, the leaked coolant at the connection point 01 between the liquid cooling plate 3 and the pipe assembly 4 is outside the first air duct 101, reducing the impact of the leaked coolant on electronic components such as the power module 2 inside the first air duct 101, thereby reducing the probability of the power module 2 and other electronic components failing due to coolant leakage.

[0156] In this embodiment, the connection point 01 between the liquid cooling plate 3 and the pipe assembly 4 can be located inside or outside the first cabinet 1.

[0157] like Figure 17 As shown, in some embodiments, the connection point 01 between the liquid cooling plate 3 and the pipe assembly 4 is located within the second air duct 102. It is understood that at least a portion of the second air duct 102 is distributed on one side of the second side plate 3b of the liquid cooling plate 3.

[0158] In the above embodiments, the second air duct 102 can protect the connection 01 and ensure the service life of the connection 01; moreover, the second air duct 102 and the first air duct 101 are isolated from each other, which can further reduce the probability of leaked coolant entering the first air duct 101, thereby further reducing the probability of electronic components such as the power module 2 in the first air duct 101 failing due to coolant leakage.

[0159] In practice, at least a portion of the pipe assembly 4 can be located in the second air duct 102, so that the second air duct 102 can also protect the pipe assembly 4.

[0160] At least a portion of the pipe assembly 4 is located within the second air duct 102, which can be understood as: the pipe assembly 4 is located within the second air duct 102, or a portion of the pipe assembly 4 is located within the second air duct 102. If a portion of the pipe assembly 4 is located within the second air duct 102, the remaining portion of the pipe assembly 4 may be located within the heat dissipation air duct 1601 of the liquid-cooled unit 5.

[0161] Combination Figure 6aand Figure 7 As shown, the first air duct 101 and the second air duct 102 are separated by a partition 104, which has an opening 1041. The liquid cooling plate 3 is connected to the partition 104 and the opening 1041 is closed. This allows a portion of the liquid cooling plate 3 to be exposed in the second air duct 102, thus facilitating the connection point 01 of the liquid cooling plate 3 to the pipe assembly 4 to be located within the second air duct 102.

[0162] The second side plate 3b of the liquid cooling plate 3 can be attached to the partition 104; or, the first side plate 3a of the liquid cooling plate 3 can be attached to the partition 104.

[0163] In practice, the liquid cooling plate 3 can also have only its joints (inlet joint 301 and outlet joint 302) inserted through the partition 104 and extending into the second air duct 102. In this case, both the inlet joint 301 and the outlet joint 302 can be sealed to the partition 104.

[0164] In this embodiment of the application, the connection point 01 can also be located in other positions within the first cabinet 1. For example... Figure 14 As shown, the first cabinet 1 is also provided with an auxiliary cavity 103. The first air duct 101 and the second air duct 102 are both isolated from the auxiliary cavity 103. The connection point 01 between the liquid cooling plate 3 and the pipe assembly 4 is located inside the auxiliary cavity 103. In this way, the impact of the hot air from the second air duct 102 on the connection point 01, the pipe assembly 4, and the coolant can be reduced. The second air duct 102 also protects the connection point 01 and the pipe assembly 4, and can alleviate the aging of the pipe assembly 4 and the liquid cooling plate 3.

[0165] In this embodiment, the power converter 100 can be an inverter, an energy storage converter, or other types.

[0166] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power converter, characterized in that, It includes a first cabinet (1), the first cabinet (1) is provided with a first air duct (101) and a second air duct (102), the second air duct (102) and the first air duct (101) are isolated from each other; The first air duct (101) accommodates the power module (2) and extends along a first direction; the first cabinet (1) has a first bottom end (1a) and a first top end (1b) along the first direction. The second air duct (102) has a first air inlet (1021) and a first air outlet (1022), both of which are connected to the external environment of the first cabinet (1); the second air duct (102) extends from the first bottom end (1a) to the first top end (1b), the first air inlet (1021) is located at the first bottom end (1a), and the first air outlet (1022) is located near the first top end (1b).

2. The power converter according to claim 1, characterized in that, The first air outlet (1022) is located at the first top (1b); Alternatively, the first air outlet (1022) is located on one side of the first cabinet (1) along the second direction, or the first air outlet (1022) is located on one side of the first cabinet (1) along the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

3. The power converter according to claim 1, characterized in that, The second air duct (102) includes a reactor air duct section (1023) and a first cooling air duct section (1024). The reactor air duct section (1023) houses a reactor (6). The first cooling air duct section (1024) and the reactor air duct section (1023) are distributed and connected along the first direction. The first air inlet (1021) is located in the reactor air duct section (1023), and the first air outlet (1022) is located in the first cooling air duct section (1024).

4. The power converter according to claim 3, characterized in that, The first cooling air duct section (1024) and the reactor air duct section (1023) are distributed along the first direction and connected by a connecting port (02); the first air outlet (1022) is located at the first top end (1b), and the projections of the first air outlet (1022) along the first direction and the projections of the connecting port (02) along the first direction are distributed at intervals; or, the projections of the first air outlet (1022) along the first direction and the projections of the connecting port (02) along the first direction have overlapping portions.

5. The power converter according to claim 1, characterized in that, The power converter also includes a liquid cooler unit (5) and a liquid cooling plate (3). The first side plate (3a) of the liquid cooling plate (3) and the power module (2) are heat exchanged. The second side plate (3b) of the liquid cooling plate (3) is connected to the liquid cooling unit (5) through the pipe assembly (4) and forms a loop, and the liquid cooling unit (5) cools the coolant in the loop.

6. The power converter according to claim 5, characterized in that, It also includes a second cabinet (16), which is located outside the first cabinet (1). The second cabinet (16) is provided with a heat dissipation duct (1601), which houses the air-liquid heat exchanger (501) of the liquid-cooled unit (5). The heat dissipation duct (1601) has an inlet (16011) and an outlet (16012), both of which are connected to the external environment of the power converter. The second cabinet (16) and the first cabinet (1) are distributed along the first direction, and the second cabinet (16) is located at the first top (1b); or, the second cabinet (16) and the first cabinet (1) are distributed along the second direction or the third direction, and the second cabinet (16) is located on the side of the first cabinet (1), with the first direction, the second direction and the third direction being perpendicular to each other.

7. The power converter according to claim 6, characterized in that, The second cabinet (16) and the first cabinet (1) are distributed along the first direction, and the second cabinet (16) is located at the first top (1b). The first air outlet (1022) is located at the first top end (1b); the second cabinet (16) is provided with a second cooling air duct section (1602), the second cooling air duct section (1602) and the heat dissipation air duct (1601) are isolated from each other, the second cooling air duct section (1602) has a second air inlet (16021) and a second air outlet (16022), the second air inlet (16021) of the second cooling air duct section (1602) is connected to the first air outlet (1022), and the second air outlet (16022) of the second cooling air duct section (1602) is connected to the external environment of the power converter; the second air outlet (16022) is located at the second top end (16b) of the second cabinet (16) away from the first cabinet (1) along the first direction. The projections of the second air inlet (16021) along the first direction and the projections of the second air outlet (16022) along the first direction are spaced apart; or, the projections of the second air inlet (16021) along the first direction and the projections of the second air outlet (16022) along the first direction have an overlapping portion.

8. The power converter according to claim 7, characterized in that, The power converter further includes at least one of a guide (12) and a flow guide (13); The guide (12) is provided with an air guide (1201), and there is an angle between the axial direction of the air guide (1201) and the axial direction of the second air inlet (16021); The guide element (13) is disposed in the second air outlet (16022), and there are at least two guide elements (13); among the at least two guide elements (13), the length of the guide element (13) closer to the air outlet (1201) along the first direction is greater than the length of the guide element (13) farther away from the air outlet (1201) along the first direction.

9. The power converter according to claim 5, characterized in that, The liquid cooling unit (5) is located in the second air duct (102), and the second air duct (102) is equipped with an air-to-air heat exchanger (7) and a first fan (8). The liquid cooling unit (5) includes an air-liquid heat exchanger (501) and a transfer pump (502), the transfer pump (502) being connected in series with the pipe assembly (4). Along the airflow direction within the second air duct (102), the air-to-air heat exchanger (7) is located between the first air inlet (1021) and the first air outlet (1022), and the air-to-liquid heat exchanger (501) is located between the first air inlet (1021) and the first air outlet (1022); The air-to-air heat exchanger (7) has a first heat exchange channel (701) and a second heat exchange channel (702) that can exchange heat with the first heat exchange channel (701). The first heat exchange channel (701) is connected to the first air duct (101), and the second heat exchange channel (702) is connected to the second air duct (102). The air-liquid heat exchanger (501) has a third heat exchange channel (5011) and a fourth heat exchange channel (5012) that can exchange heat with the third heat exchange channel (5011). The third heat exchange channel (5011) is connected to the tube assembly (4), and the fourth heat exchange channel (5012) is connected to the second air duct (102).

10. The power converter according to claim 9, characterized in that, The liquid cooling plate (3) is closer to the first air outlet (1022) in the first direction than the air-liquid heat exchanger (501). The liquid cooling unit (5) further includes a liquid storage device (504), and at least a portion of the liquid storage device (504) is closer to the first air outlet (1022) than the liquid cooling plate (3) along the first direction. The liquid storage device (504) is connected to the pipe assembly (4) through the delivery pump (502), and the liquid storage device (504) is provided with an exhaust structure (5041).

11. The power converter according to any one of claims 5-10, characterized in that, The connection (01) between the liquid cooling plate (3) and the pipe assembly (4) is located outside the first air duct (101).

12. The power converter according to claim 1, characterized in that, The second air duct (102) is equipped with a reactor (6), an air-to-air heat exchanger (7) and a first fan (8); The first air inlet (1021), the air-to-air heat exchanger (7), the reactor (6) and the first air outlet (1022) are distributed along the airflow direction in the second air duct (102); The air-to-air heat exchanger (7) has a first heat exchange channel (701) and a second heat exchange channel (702) that can exchange heat with the first heat exchange channel (701). The first heat exchange channel (701) is connected to the first air duct (101), and the second heat exchange channel (702) is connected to the second air duct (102).

13. The power converter according to any one of claims 9, 10, and 12, characterized in that, The air-to-air heat exchangers (7) are at least two and are distributed at intervals along the second direction or the third direction, with the first direction, the second direction and the third direction being perpendicular to each other.

14. The power converter according to any one of claims 1, 2, 5-10, and 12, characterized in that, The first air duct (101) includes a power air duct section (1011) and a power distribution air duct section (1012). The power air duct section (1011) accommodates the power module (2), and the power distribution air duct section (1012) accommodates the power distribution component (14). The power air duct section (1011) and the power distribution air duct section (1012) are distributed and connected along a first direction. The power distribution air duct section (1012) extends to the first bottom end (1a), and the power air duct section (1011) extends to the first top end (1b). The second air duct (102) includes a reactor air duct section (1023) and a first cooling air duct section (1024). The reactor air duct section (1023) houses a reactor (6). The first cooling air duct section (1024) and the reactor air duct section (1023) are distributed and connected along the first direction. The first air inlet (1021) is located in the reactor air duct section (1023), and the first air outlet (1022) is located in the first cooling air duct section (1024). The reactor air duct section (1023) extends along the second direction to both sides of the first cabinet (1), and the power distribution air duct section (1012) is distributed on both sides of the reactor air duct section (1023) along the third direction. The first direction, the second direction and the third direction are perpendicular to each other. Alternatively, the reactance air duct section (1023) extends along the second direction to one side of the first cabinet (1), and the power distribution air duct section (1012) is distributed on both sides of the reactance air duct section (1023) along the third direction and on one side of the reactance air duct section (1023) along the second direction, with the first direction, the second direction and the third direction being perpendicular to each other; Alternatively, the power distribution duct section (1012) may surround the outside of the reactance duct section (1023).

15. The power converter according to any one of claims 1-10 and 12, characterized in that, The first bottom end (1a) is provided with a support leg (9), and there are at least two support legs (9) distributed around the first air inlet (1021).

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