Power module heat dissipation assembly, power assembly and converter

Abstract

The utility model discloses a power module heat dissipation assembly, a power assembly and a converter, the power module heat dissipation assembly comprises a housing, a centrifugal fan assembly and a diversion structure, an installation area is formed in the housing, and the installation area is used for installing a power module; the centrifugal fan assembly is arranged in the shell, and the centrifugal fan assembly is provided with an air outlet facing the mounting area; the flow guide structure is arranged between the air outlet of the centrifugal fan assembly and the mounting area; the installation area is provided with an air inlet side facing the air outlet, the air inlet side is provided with a first side edge and a second side edge which are opposite, air discharged from the air outlet faces the first side edge, the flow guide structure comprises a flow guide part, and compared with the first side edge, the flow guide part is closer to the second side edge and used for guiding airflow of the air outlet towards the second side edge. According to the technical scheme, the local flow of the air inlet side is adjusted, the air distribution of the air outlet side of the centrifugal fan is optimized, the local flow speed is increased, and the purpose of improving the cooling efficiency is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transportation, and in particular to a power module heat dissipation component, a power component and a converter. Background Art

[0002] In the rail transit industry, forced air cooling is one of the commonly used cooling methods for converters. For some converter equipment, centrifugal fans are usually used as heat dissipation fans due to their large system resistance. However, there is a certain outflow angle on the outlet side of the centrifugal fan. When the airflow with a certain incident angle passes through the air duct of the converter, the air intake at some edge parts of the air duct will be smaller than that at other parts, and eddy currents are easily generated in this part, and the local flow velocity is small, resulting in poor heat dissipation effect in this part. Utility Model Content

[0003] The main purpose of the utility model is to provide a power module heat dissipation component, a power component and a converter, aiming to improve the heat dissipation effect of the power module of the existing converter.

[0004] To achieve the above-mentioned purpose, the utility model proposes a power module heat dissipation component, comprising:

[0005] A housing, wherein a mounting area is formed in the housing, and the mounting area is used for mounting a power module;

[0006] a centrifugal fan assembly, disposed in the housing and outside the installation area, the centrifugal fan assembly having an air outlet disposed toward the installation area; and

[0007] A flow guide structure, arranged between the air outlet of the centrifugal fan assembly and the installation area;

[0008] Among them, the installation area has an air inlet side facing the air outlet, the air inlet side has a first side edge and a second side edge relative to each other, the air outlet from the air outlet is arranged toward the first side edge, and the guide structure includes a guide portion, which is arranged closer to the second side edge than the first side edge, and the guide portion is used to guide the airflow of the air outlet toward the second side edge.

[0009] Optionally, the guide portion is at least partially inclined toward the second side edge in a direction close to the installation area.

[0010] Optionally, an angle between the air guide portion and a surface on the air inlet side of the installation area is a, and an opening of the angle a faces the first side edge, wherein 30°<a<90°.

[0011] Optionally, it is characterized in that the distance between the first side edge and the second side edge is R, and in the direction relative to the first side edge and the second side edge, the distance between the second side edge and the guide structure is X, wherein 0.05R<X<0.5R.

[0012] Optionally, the installation area has a low heat dissipation area and a high heat dissipation area, wherein the guide portion is at least partially arranged corresponding to the low heat dissipation area.

[0013] Optionally, 0.05R<X<0.25R.

[0014] Optionally, in the direction relative to the first side edge and the second side edge, the length of the flow guide structure is h, wherein 0.025R<h<0.15R.

[0015] Optionally, the guide structure further includes a mounting plate, the guide plate is fixedly mounted on the mounting plate, and the mounting plate is mounted on the air inlet side of the mounting area.

[0016] Optionally, a projection of the mounting plate on the air inlet side of the mounting area is located within a projection of the guide plate on the air inlet side of the mounting area.

[0017] Optionally, an air inlet channel is arranged on the air inlet side of the installation area, and the cross section of the air inlet channel is arranged in a circular shape.

[0018] To achieve the above objectives, the present application also proposes a power component, comprising:

[0019] The power module heat dissipation assembly as described above; and

[0020] The power module is installed in the installation area of ​​the shell of the power module heat dissipation assembly.

[0021] Optionally, the power module includes an air-core reactor.

[0022] To achieve the above objective, the present application further proposes a converter, which includes the power component as described above.

[0023] In the technical solution provided by the utility model, a guide structure is arranged in the power module heat dissipation assembly, and the guide part of the guide structure can guide the airflow that should flow outside the second side edge to the area where the second side edge is located, thereby increasing the air volume at the second side edge, completing the regulation of the local flow on the air inlet side, optimizing the airflow organization on the air outlet side of the centrifugal fan, and increasing the local flow rate, thereby achieving the purpose of improving the cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 is a three-dimensional schematic diagram of an existing converter;

[0026] Figure 2 for Figure 1 A top view of the converter in FIG.

[0027] Figure 3 for Figure 2 A local enlarged view of point B in FIG.

[0028] Figure 4 A three-dimensional schematic diagram of an embodiment of a power component provided by the utility model;

[0029] Figure 5 for Figure 4 A top view of the power components in FIG.

[0030] Figure 6 for Figure 5 A local enlarged view of point A in FIG.

[0031] Figure 7 for Figure 4 A schematic diagram of the structure of the air inlet side of the installation area;

[0032] Figure 8 A schematic structural diagram of another embodiment of the air inlet side of the installation area provided by the utility model;

[0033] Fig. 9 A schematic structural diagram of another embodiment of the air inlet side of the installation area provided by the utility model.

[0034] Description of Figure Numbers:

[0035] Label name Label name 100 Power Components 10 case 20 Power Module 30 Centrifugal fan components 31 Air outlet 40 Diversion structure 41 Diversion part 21 First side edge 22 Second side edge 42 Mounting Plate 23 Air inlet channel

[0036] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0040] See also Figures 1 to 3 In the rail transit industry, forced air cooling is one of the commonly used cooling methods for converters. For some converter equipment, centrifugal fans are usually used as heat dissipation fans due to their large system resistance. However, there is a certain outflow angle on the outlet side of the centrifugal fan. When the airflow with a certain incident angle passes through the air duct of the converter, the air intake at some edge parts of the air duct will be smaller than that at other parts, and eddy currents are easily generated in this part, and the local flow velocity is small, resulting in poor heat dissipation effect in this part.

[0041] In order to solve the above problems, the utility model provides a power module heat dissipation component, a power component and a converter. Figure 4 A three-dimensional schematic diagram of an embodiment of a power component provided by the utility model; Figure 5 for Figure 4 A top view of the power components in FIG. Figure 6 for Figure 5 A local enlarged view of point A in FIG. Figure 7 for Figure 4A schematic diagram of the structure of the air inlet side of the installation area; Figure 8 A schematic structural diagram of another embodiment of the air inlet side of the installation area provided by the utility model; Fig. 9 A schematic structural diagram of another embodiment of the air inlet side of the installation area provided by the utility model.

[0042] See also Figures 4 to 9 The power module heat dissipation assembly includes a housing 10, a centrifugal fan assembly 30 and a guide structure 40. The housing 10 is formed with an installation area, and the installation area is used for installing the power module 20; the centrifugal fan assembly 30 is arranged in the housing 10, and the centrifugal fan assembly 30 has an air outlet 31 arranged toward the installation area; the guide structure 40 is arranged between the air outlet 31 of the centrifugal fan assembly 30 and the installation area;

[0043] Among them, the installation area has an air inlet side facing the air outlet 31, and the air inlet side has a first side edge 21 and a second side edge 22 relative to each other. The air outlet from the air outlet 31 is arranged toward the first side edge 21, and the guide structure 40 includes a guide portion 41. Compared with the first side edge 21, the guide portion 41 is arranged closer to the second side edge 22. The guide portion 41 is used to guide the airflow of the air outlet 31 toward the second side edge 22.

[0044] It should be noted that the specific implementation form of the power module 20 is not limited. Specifically, it can be a branch including an insulating bracket, an air-core inductor, or it can include other components, etc., which are not limited here. Some components in the power module 20 will generate heat and need to be cooled. Some components, such as insulating brackets, do not generate heat themselves and have low heat dissipation requirements.

[0045] See also Figures 7 to 9 The positions of the first side edge 21 and the second side edge 22 are not fixed, but are determined by the air outlet direction of the air outlet 31. For example, the air outlet direction has a first component direction located in the plane where the air inlet side is located, and the position pointed to by the first component direction is the first side edge 21, and the position opposite to the first component direction is the second side edge 22. In the present embodiment, the first component direction is from right to left, the first side edge 21 is the left edge of the air inlet side, and the second side edge 22 is the right edge of the air inlet side. Of course, in other embodiments, the first component direction may be from left to right, in which case the first side edge 21 is the right edge of the air inlet side, and the second side edge 22 is the left edge of the air inlet side. It may also be from the lower left to the upper right, in which case the first side edge 21 is the upper right side edge of the air inlet side, and the second side edge 22 is the lower left side edge of the air inlet side, and so on. No limitation is made here.

[0046] Compared with the first side edge 21, the guide portion 41 is arranged closer to the second side edge 22, that is, the guide structure 40 is arranged between the middle part of the air inlet side and the second side edge 22, so that the airflow that should flow to other places can be guided to the second side edge 22, thereby increasing the air intake at the second side edge 22 and reducing the occurrence of vortex phenomenon.

[0047] In the technical solution provided by the present invention, a guide structure 40 is provided in the heat dissipation assembly of the power module, and the guide portion 41 of the guide structure 40 can guide the airflow that should flow outside the second side edge 22 to the area where the second side edge 22 is located, thereby increasing the wind volume at the second side edge 22, reducing the occurrence of eddy currents, and balancing the heat dissipation of the power module 20.

[0048] The specific implementation form of the guide portion 41 is not limited and may be in the form of a guide channel. For example, in one embodiment, a guide channel is constructed on the air inlet side of the power module 20, and one end of the guide channel is opened outside the second side edge 22, and the other end is arranged toward the second side edge 22, thereby guiding the airflow outside the second side edge 22 to the second side edge 22. Of course, the guide portion 41 may also be in the form of a guide plate, a guide cavity, etc., which is not limited here.

[0049] In one embodiment, the guide portion 41 is at least partially inclined toward the second side edge 22 in a direction close to the power module 20. In the technical solution of this embodiment, by inclined the guide portion 41 toward the second side edge 22 in a direction close to the installation area, after the airflow blown out by the centrifugal fan contacts the guide portion 41, the movement direction of the airflow will become the inclined direction of the guide portion 41, thereby moving toward the second side edge 22.

[0050] It should be emphasized that the guide portion 41 is at least partially inclined toward the second side edge 22 , and may be only partially inclined toward the second side edge 22 , or may be entirely inclined toward the second side edge 22 , which is not limited here.

[0051] It can be understood that the guide portion 41 cannot change the direction of the airflow outflowing from the centrifugal fan too much, that is, the angle between the direction of the airflow blown out by the centrifugal fan and the direction after being guided by the guide portion 41 cannot be too large, otherwise, it will cause a large loss of airflow, and less airflow will be supplemented to the second side edge 22. Of course, the angle between the two directions cannot be too small, otherwise, the airflow cannot be guided to the second side edge 22.

[0052] Therefore, please refer to Figure 6In one embodiment, the angle between the guide portion 41 and the surface on the air inlet side of the installation area is a, wherein 30°<a<90°. When a is 90° or greater than 90°, the angle between the two directions is too small, and the change in the direction of the airflow is too small, so the airflow at the air outlet 31 cannot be guided to the second side edge 22. When a is less than or equal to 30°, the angle between the two directions is too large, and the change in the direction of the airflow is too large, resulting in a large airflow loss, a small amount of airflow supplied to the second side edge 22, and a poor balancing effect.

[0053] In the solution of this embodiment, by setting the angle between the guide part 41 and the surface on the air inlet side of the installation area to 30°~90°, the change in the movement direction of the airflow blown out by the centrifugal fan caused by the guide part 41 will not be too large or too small, thereby enhancing the heat dissipation effect of the centrifugal fan on the second side edge 22.

[0054] Of course, in other embodiments, a may also be set to be less than or equal to 30°, which is not limited here.

[0055] It can be understood that the distance between the guide portion 41 and the second side edge 22 cannot be too close, otherwise the guide portion 41 will block part of the airflow that should flow to the second side edge 22, thereby affecting the heat dissipation effect on the second side edge 22. Of course, the distance between the guide portion 41 and the second side edge 22 cannot be too far, otherwise the gas after guidance needs to pass through a longer path to reach the second side edge 22, and the loss of airflow is large.

[0056] Therefore, please refer to Figure 7 In one embodiment, the distance between the first side edge 21 and the second side edge 22 is R, and in the direction relative to the first side edge 21 and the second side edge 22, the distance between the second side edge 22 and the guide structure 40 is X, wherein 0.05R<X<0.5R.

[0057] In the technical solution of the present embodiment, the distance between the second side edge 22 and the guide structure 40 is less than 0.5R, that is, it is arranged closer to the second side edge 22, thereby avoiding the occurrence of a large airflow loss caused by a long transmission path, and the distance between the second side edge 22 and the guide structure 40 is greater than 0.05R, which can effectively avoid blocking the airflow that should flow to the second side edge 22, thereby improving the heat dissipation effect at the second side edge 22.

[0058] It is understandable that the smaller the distance between the second side edge 22 and the guide structure 40 is, the shorter the path of the gas flowing to the second side edge 22 after guidance is, the smaller the corresponding airflow loss is, and the better the heat dissipation effect is.

[0059] Therefore, in a further embodiment, 0.05R<X<0.25R. In the solution of this embodiment, by further reducing X, compared with the case where X is in the range of 0.25R to 0.5R, the air path is shorter, the air flow loss is smaller, and the heat dissipation effect is better.

[0060] In one embodiment, not all components of the power module 20 require very strong heat dissipation. For example, the insulating bracket of the power module 20 does not generate heat and thus does not require very strong heat dissipation. Correspondingly, the installation area has a low heat dissipation zone and a high heat dissipation zone. The low heat dissipation zone corresponds to the installation of components with low heat dissipation requirements of the power module 20, such as the insulating bracket, and the high heat dissipation zone corresponds to the installation of components with high heat dissipation requirements of the power module 20, wherein the guide portion 41 is at least partially arranged to correspond to the low heat dissipation zone.

[0061] In the technical solution of this embodiment, by setting the guide part 41 corresponding to the low heat dissipation zone, the guide part 41 can guide the airflow that should be blown to the low heat dissipation zone to the high heat dissipation zone, thereby redistributing the heat dissipation airflow according to the heat dissipation requirements of different areas and improving the heat dissipation effect.

[0062] It should be noted that the low heat dissipation area refers to the area where non-heat-generating components of the power module 20 are installed, and the high heat dissipation area refers to the area where self-heating components of the power module 20 are installed.

[0063] At least part of the guide portion 41 is arranged corresponding to the low heat dissipation area. The entire guide portion 41 may be arranged corresponding to the low heat dissipation area, or only part of the guide portion 41 may be arranged corresponding to the low heat dissipation area, which is not limited here.

[0064] It should be emphasized that the length of the guide portion 41 cannot be too large, otherwise, the guided air volume will be too large, which will have a greater impact on the overall heat dissipation of the power module 20 and will also have a great impact on the guide portion 41. Of course, the length of the guide portion 41 cannot be too small, otherwise, the guided air volume will be too small, and the enhanced effect on the heat dissipation of the second side edge 22 will be poor.

[0065] Therefore, in one embodiment, in the direction in which the first side edge 21 and the second side edge 22 are opposite to each other, the length of the flow guiding structure 40 is h, wherein 0.025R<h<0.15R.

[0066] In the solution of this embodiment, the length of the guide structure 40 is less than 0.15R, so as to avoid the phenomenon that the heat dissipation of the part outside the second side edge 22 of the installation area is too great. The length of the guide structure 40 is greater than 0.025R, which can ensure that sufficient air volume can be guided to the second side edge 22 to reduce the occurrence of eddy currents.

[0067] It should be noted that, since the air guide portion 41 is at least partially arranged to be inclined, there may be a phenomenon of poor installation stability.

[0068] In this regard, in one embodiment, the air guide structure 40 further includes a mounting plate 42 , the air guide plate is fixedly mounted on the mounting plate 42 , and the mounting plate 42 is mounted on the air inlet side of the power module 20 .

[0069] In the technical solution of this embodiment, a mounting plate 42 is provided, and the shape of the mounting plate 42 is adapted to the shape of the air inlet side of the power module 20, so that the mounting plate 42 can be installed in close proximity to the air inlet side of the power module 20, thereby improving the stability of the guide plate installation.

[0070] Furthermore, the specific implementation form of the mounting plate 42 is not limited, and it can be a whole plate or multiple plates, etc., which is not limited here. The form of fixed installation between the mounting plate 42 and the guide part 41 is not limited, and it can be welding or one-piece molding, etc., which is not limited here.

[0071] It is understandable that the mounting plate 42 can be extended toward the first side edge 21 or the second side edge 22. When the mounting plate 42 is extended toward the second side edge 22, it may partially block the airflow blowing toward the second side edge 22, thereby affecting the heat dissipation effect on the second side edge 22.

[0072] Therefore, in one embodiment, the projection of the mounting plate 42 on the wind inlet side of the mounting area is located within the projection of the guide plate on the wind inlet side of the mounting area.

[0073] In the technical solution of this embodiment, since the guide part 41 is arranged on the air inlet side of the installation area, the position where the projection of the guide part 41 on the air inlet side of the installation area is located also has a relatively small air inlet volume. Therefore, arranging the installation plate 42 in this projection area can avoid the installation plate 42 from blocking the heat dissipation airflow.

[0074] Of course, in other embodiments, the mounting plate 42 may further have ventilation holes on the surface to enhance the heat dissipation effect, or may have a hollow design, etc., which is not limited here.

[0075] In one embodiment, since the mounting plate 42 is in contact with the air inlet side of the mounting area, when 30°<a<90°, the angle between the mounting plate 42 and the air guide portion 41 is also in the range of 30° to 90°.

[0076] Furthermore, in one embodiment, an air inlet channel 23 is provided on the air inlet side of the installation area, and the cross section of the air inlet channel 23 is circular.

[0077] In the technical solution of this embodiment, by setting the air inlet channel 23 to be circular, on the one hand, it is easy to machine, and on the other hand, the circular design can increase the air intake volume.

[0078] In this embodiment, the distance between the first side edge 21 and the second side edge 22 is the diameter of the circle, and the first side edge 21 and the second side edge 22 are endpoints of the circle.

[0079] Of course, in other embodiments, the air inlet channel 23 may also be a plurality of heat dissipation holes arranged on the air inlet side, and the shape of the heat dissipation holes may be circular, square, or triangular, etc., which is not limited here.

[0080] To achieve the above-mentioned purpose, the present application also proposes a power component 100, which includes a power module 20 and a power module heat dissipation component, and the power module heat dissipation component includes a shell 10, a centrifugal fan component 30 and a guide structure 40. An installation area is formed in the shell 10, and the installation area is used for installing the power module 20; the centrifugal fan component 30 is arranged in the shell 10, and the centrifugal fan component 30 has an air outlet 31 arranged toward the installation area; the guide structure 40 is arranged between the air outlet 31 of the centrifugal fan component 30 and the installation area, wherein the installation area has an air inlet side facing the air outlet 31, and the air inlet side has a first side edge 21 and a second side edge 22 opposite to each other, and the air outlet from the air outlet 31 is arranged toward the first side edge 21, and the guide structure 40 includes a guide portion 41, and compared with the first side edge 21, the guide portion 41 is arranged closer to the second side edge 22, and the guide portion 41 is used to guide the airflow of the air outlet 31 toward the second side edge 22.

[0081] The power module 20 is installed in the installation area of ​​the shell 10. In the technical solution of this embodiment, a guide structure 40 is provided in the power module heat dissipation assembly. The guide portion 41 of the guide structure 40 can guide the airflow that should flow outside the second side edge 22 to the area where the second side edge 22 is located, thereby increasing the wind volume at the second side edge 22, reducing the occurrence of eddy currents, and balancing the heat dissipation of the power module 20.

[0082] The specific implementation form of the power module 20 is not limited. Specifically, it can be a branch including an insulating bracket and an air-core reactor, or it can include other components, etc., which are not limited here. Some components in the power module 20 will generate heat and need to be cooled. Some components, such as insulating brackets, do not generate heat themselves and have a small cooling requirement. In one embodiment, the power module 20 includes an air-core reactor.

[0083] To achieve the above-mentioned purpose, the present application further proposes a converter, the converter comprising a power component 100, the power component 100 comprising a power module 20 and a power module heat dissipation component, the power module heat dissipation component comprising a housing 10, a centrifugal fan component 30 and a guide structure 40, the housing 10 is formed with an installation area, the installation area is used for installing the power module 20; the centrifugal fan component 30 is arranged in the housing 10, the centrifugal fan component 30 has an air outlet 31 arranged toward the installation area; the guide structure 40 is arranged between the air outlet 31 of the centrifugal fan component 30 and the installation area, wherein the installation area has an air inlet side facing the air outlet 31, the air inlet side has a first side edge 21 and a second side edge 22 opposite to each other, the air outlet from the air outlet 31 is arranged toward the first side edge 21, the guide structure 40 comprises a guide portion 41, compared with the first side edge 21, the guide portion 41 is arranged closer to the second side edge 22, and the guide portion 41 is used to guide the airflow of the air outlet 31 toward the second side edge 22;

[0084] Among them, the installation area has an air inlet side facing the air outlet 31, and the air inlet side has a first side edge 21 and a second side edge 22 relative to each other. The air outlet from the air outlet 31 is arranged toward the first side edge 21, and the guide structure 40 includes a guide portion 41. Compared with the first side edge 21, the guide portion 41 is arranged closer to the second side edge 22. The guide portion 41 is used to guide the airflow of the air outlet 31 toward the second side edge 22.

[0085] In the technical solution provided by the present invention, a guide structure 40 is provided in the heat dissipation assembly of the power module, and the guide portion 41 of the guide structure 40 can guide the airflow that should flow outside the second side edge 22 to the area where the second side edge 22 is located, thereby increasing the wind volume at the second side edge 22, reducing the occurrence of eddy currents, and balancing the heat dissipation of the power module 20.

[0086] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A power module heat dissipation component, characterized in that: include: A housing, wherein a mounting area is formed in the housing, and the mounting area is used for mounting a power module; a centrifugal fan assembly, disposed in the housing and outside the installation area, the centrifugal fan assembly having an air outlet disposed toward the installation area; and A flow guide structure, arranged between the air outlet of the centrifugal fan assembly and the installation area; Among them, the installation area has an air inlet side facing the air outlet, the air inlet side has a first side edge and a second side edge relative to each other, the air outlet from the air outlet is arranged toward the first side edge, and the guide structure includes a guide portion, which is arranged closer to the second side edge than the first side edge, and the guide portion is used to guide the airflow of the air outlet toward the second side edge.

2. The power module heat dissipation assembly according to claim 1, characterized in that: The guide portion is at least partially arranged to be inclined toward the second side edge in a direction close to the installation area.

3. The power module heat dissipation assembly according to claim 2, characterized in that: The included angle between the air guide portion and the surface of the installation area on the air inlet side is a, and the opening of the included angle a faces the first side edge, wherein 30°<a<90°.

4. The power module heat dissipation assembly according to any one of claims 1 to 3, characterized in that: The distance between the first side edge and the second side edge is R, and in the direction opposite to the first side edge and the second side edge, the distance between the second side edge and the guide structure is X, wherein 0.05R<X<0.5R.

5. The power module heat dissipation assembly according to claim 4, characterized in that: The installation area has a low heat dissipation area and a high heat dissipation area, wherein the guide portion is at least partially arranged corresponding to the low heat dissipation area.

6. The power module heat dissipation assembly according to claim 4, characterized in that: 0.05R<X<0.25R.

7. The power module heat dissipation assembly according to claim 4, characterized in that: In the direction opposite to the first side edge and the second side edge, the length of the flow guide structure is h, wherein 0.025R<h<0.15R.

8. The power module heat dissipation assembly according to claim 1, characterized in that: The air guide structure further includes a mounting plate, the air guide portion is fixedly mounted on the mounting plate, and the mounting plate is mounted on the air inlet side of the mounting area.

9. The power module heat dissipation assembly according to claim 8, characterized in that: The projection of the mounting plate on the air inlet side of the mounting area is located within the projection of the air guide portion on the air inlet side of the mounting area.

10. The power module heat dissipation assembly according to claim 1, characterized in that: An air inlet channel is arranged on the air inlet side of the installation area, and the cross section of the air inlet channel is arranged in a circular shape.

11. A power component, characterized in that: include: The power module heat dissipation assembly according to any one of claims 1 to 10; and The power module is installed in the installation area of ​​the shell of the power module heat dissipation assembly.

12. The power assembly according to claim 11, characterized in that: The power module includes an air-core reactor.

13. A converter, characterized in that: The converter comprises the power component according to any one of claims 11 to 12.

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