Heat dissipation box body and power conversion equipment

Abstract

The embodiment of the utility model relates to the technical field of device heat dissipation, in particular to a heat dissipation box body and power conversion equipment. The heat dissipation box body comprises a box body, a heat dissipation fin set, a heat dissipation fan and a rotating assembly, a closed cavity is formed in the box body and used for containing a heating device, the heat dissipation fin set is arranged on the outer surface of the box body, the rotating assembly comprises a first fan blade, a second fan blade and a transmission shaft, and the transmission shaft can rotate relative to the closed cavity. The first fan blade and the cooling fan are both located in the closed cavity, the cooling fan drives the first fan blade to rotate, the first end of the transmission shaft is located in the closed cavity and fixedly connected with the first fan blade, the second end of the transmission shaft is located outside the closed cavity and fixedly connected with the second fan blade, and the second fan blade is located outside the closed cavity and blows air towards the cooling fin set. When the cooling fan drives the first fan blade to rotate, the second fan blade can be driven to rotate through the transmission shaft, the cooling efficiency is improved, and the cooling fan has the advantages of being simple in structure, low in cost and low in noise.

Description

Technical Field

[0001] This specification relates to the field of device heat dissipation technology, and in particular to a heat sink and power conversion device. Background Technology

[0002] In related technologies, heat-generating components in power conversion equipment are typically installed within a sealed cavity inside a housing to ensure a high level of sealing and protection. To ensure effective heat dissipation for these components, a cooling fan is usually installed inside the housing, and heat dissipation fins are mounted on the outer wall. The cooling fan promotes airflow within the sealed cavity, evenly transferring heat to the cavity walls, where it then exchanges heat with the external environment through the heat dissipation fins. However, this heat dissipation method suffers from low efficiency.

[0003] Therefore, there is an urgent need for a heat dissipation enclosure and power conversion equipment to solve the above problems. Utility Model Content

[0004] The purpose of this specification is to provide a heat dissipation enclosure and a power conversion device to improve heat dissipation efficiency. The power conversion device has the advantages of simple structure, low cost, and low noise.

[0005] To achieve this objective, the embodiments in this specification adopt the following technical solutions:

[0006] A heat dissipation enclosure, comprising:

[0007] The housing has a sealed cavity inside, which is used to house the heating element;

[0008] A heat dissipation fin assembly is disposed on the outer surface of the housing;

[0009] A cooling fan, wherein the cooling fan is housed within the sealed cavity; and

[0010] A rotating assembly includes a first fan blade, a second fan blade, and a drive shaft. The drive shaft is rotatable relative to the sealed cavity. The first fan blade is located inside the sealed cavity. The cooling fan drives the first fan blade to rotate. The first end of the drive shaft is located inside the sealed cavity and is fixedly connected to the first fan blade. The second end of the drive shaft is located outside the sealed cavity and is fixedly connected to the second fan blade. The second fan blade is located outside the sealed cavity and blows air toward the heat dissipation fin assembly.

[0011] As an optional solution, a first through hole is provided on the wall of the box, and the drive shaft is rotatably passed through the first through hole;

[0012] The drive shaft includes a first connecting shaft and a second connecting shaft. The first end of the drive shaft is the first connecting shaft, and the second end of the drive shaft is the second connecting shaft. The first connecting shaft and the second connecting shaft are integrally formed; or, the first connecting shaft and the second connecting shaft are separately provided, and the first connecting shaft and the second connecting shaft are connected in a driving connection.

[0013] As an optional solution, the rotating assembly further includes:

[0014] The first bearing has its outer ring fixed to the wall of the housing, and its inner ring sleeved on the drive shaft.

[0015] As an optional solution, the housing wall has an accommodating space, and the rotating assembly further includes:

[0016] An external magnet, rotatably housed within the accommodating space, and fixedly connected to the second connecting shaft; and

[0017] An inner magnet is located inside the sealed cavity. The inner magnet is rotatably arranged around the outer periphery of the accommodating space and is fixedly connected to the first connecting shaft. The inner magnet is magnetically coupled and driven by the outer magnet through the box wall of the box.

[0018] As an optional solution, the box wall of the enclosure is recessed towards the interior of the sealed cavity to form the accommodating space, and the box wall of the enclosure forms a protrusion inside the sealed cavity, with the inner magnet rotating around the outer periphery of the protrusion.

[0019] As an optional solution, the rotating assembly further includes:

[0020] A magnetic shielding shell is provided on the outer periphery of the inner magnet. A second through hole is provided on the magnetic shielding shell. The end of the first connecting shaft that rotatably passes through the second through hole is fixedly connected to the first fan blade.

[0021] As an optional solution, the rotating assembly further includes:

[0022] A second bearing, wherein the outer ring of the second bearing is fixedly connected to the wall of the second through hole, and the inner ring of the second bearing is fixedly connected to the first connecting shaft; and / or

[0023] The third bearing has its outer ring fixedly connected to the opening of the accommodating space, and its inner ring is fixedly fitted with the second connecting shaft.

[0024] As an optional solution, at least two heat dissipation fin groups are spaced apart on the outer wall of the housing.

[0025] As an optional solution, each heat dissipation fin group includes multiple heat dissipation fins arranged at intervals, and each heat dissipation fin is disposed on the outer wall of the housing.

[0026] A power conversion device includes a heating element and a heat sink housing as described above, wherein the heating element is housed within the sealed cavity.

[0027] This specification provides a heat dissipation enclosure, which includes a housing, a heat dissipation fin assembly, a heat dissipation fan, and a rotating assembly. The housing has a sealed cavity inside for housing a heat-generating device. The heat dissipation fin assembly is disposed on the outer surface of the housing. The rotating assembly includes a first fan blade, a second fan blade, and a drive shaft. The drive shaft is rotatable relative to the sealed cavity. The first fan blade and the heat dissipation fan are both located inside the sealed cavity. The heat dissipation fan drives the first fan blade to rotate. The first end of the drive shaft is located inside the sealed cavity and is fixedly connected to the first fan blade. The second end of the drive shaft is located outside the sealed cavity and is fixedly connected to the second fan blade. The second fan blade is located outside the sealed cavity and blows air towards the heat dissipation fin assembly. The heat dissipation enclosure provided in this specification, when the cooling fan is started, drives the first fan blade inside the sealed cavity to rotate, so that the heat inside the sealed cavity is evenly transferred to the inner wall of the enclosure. During the rotation of the first fan blade, it synchronously drives the external second fan blade to rotate via a drive shaft, causing the second fan blade to blow air towards the heat dissipation fin assembly. This increases the turbulence effect of the external air, improves the heat exchange effect between the heat dissipation fin assembly and the external environment, and effectively improves the heat dissipation efficiency within the sealed cavity. Furthermore, this heat dissipation enclosure does not require a forced airflow device such as a fan outside the sealed cavity; the turbulence effect of the external airflow is achieved simply by setting up a rotating component. It has the advantages of simple structure, low cost, and low noise.

[0028] This specification also provides a power conversion device, which improves heat dissipation efficiency by using the above-mentioned heat dissipation box, and has the advantages of simple structure, low cost and low noise. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the power conversion device provided in Embodiment 1 of this utility model;

[0030] Figure 2 This is a first structural cross-sectional view of the power conversion device provided in Embodiment 1 of this utility model;

[0031] Figure 3 This is a second structural cross-sectional view of the power conversion device provided in Embodiment 1 of this utility model;

[0032] Figure 4This is a schematic diagram of the power conversion device provided in Embodiment 2 of this utility model;

[0033] Figure 5 This is a structural cross-sectional view of the power conversion device provided in Embodiment 3 of this utility model;

[0034] Figure 6 This is a structural cross-sectional view of the power conversion device provided in Embodiment 4 of this utility model;

[0035] Figure 7 This is a partial structural cross-sectional view of the power conversion device provided in Embodiment 5 of this utility model.

[0036] In the picture:

[0037] 1. Housing; 11. Sealed cavity; 12. First through hole; 13. Accommodation space; 14. Protrusion; 2. Heating element; 21. Power semiconductor device; 22. First heating element; 23. Second heating element; 3. Heat sink fin assembly; 31. Heat sink fins; 4. Heat sink fan; 5. Rotating assembly; 51. First fan blade; 52. Second fan blade; 53. Drive shaft; 531. First connecting shaft; 532. Second connecting shaft; 54. First bearing; 55. Outer magnet; 56. Inner magnet; 57. Magnetic shielding shell; 571. Second through hole; 58. Second bearing; 59. Third bearing. Detailed Implementation

[0038] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the embodiments of this specification clearer, the technical solutions of the embodiments of this specification will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0039] In the description of the embodiments in this specification, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this specification based on the specific circumstances.

[0040] In the embodiments of this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this specification. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0042] Example 1

[0043] In related technologies, heat-generating components in power conversion equipment are typically installed within a sealed cavity inside a housing to ensure a high level of sealing and protection. To ensure effective heat dissipation for these components, a cooling fan is usually installed inside the housing, and heat dissipation fins are mounted on the outer wall. The cooling fan promotes airflow within the sealed cavity, evenly transferring heat to the cavity walls, where it then exchanges heat with the external environment through the heat dissipation fins. However, this heat dissipation method suffers from low efficiency.

[0044] To solve the above problems, such as Figures 1-3As shown, this embodiment provides a heat dissipation box, which includes a box body 1, a heat dissipation fin assembly 3, a heat dissipation fan 4, and a rotating assembly 5. The box body 1 has a sealed cavity 11 inside, which is used to house the heat-generating device 2. The heat dissipation fin assembly 3 is disposed on the outer surface of the box body 1. The heat dissipation fan 4 is housed in the sealed cavity 11. The rotating assembly 5 includes a first fan blade 51, a second fan blade 52, and a drive shaft 53. The drive shaft 53 can rotate relative to the sealed cavity 11. The first fan blade 51 is located inside the sealed cavity 11. The heat dissipation fan 4 drives the first fan blade 51 to rotate. A first connecting shaft 531 is fixedly connected to the first fan blade 51. The first end of the drive shaft 53 is located inside the sealed cavity 11 and fixedly connected to the first fan blade 51. The second end of the drive shaft 53 is located outside the sealed cavity 11 and fixedly connected to the second fan blade 52. The second fan blade 52 is located outside the sealed cavity 11 and blows air towards the heat dissipation fin assembly 3. The heat dissipation enclosure provided in this embodiment, when the cooling fan 4 is started, can drive the first fan blade 51 inside the sealed cavity 11 to rotate, and make the heat inside the sealed cavity 11 evenly transferred to the inner wall of the enclosure 1. During the rotation of the first fan blade 51, it can synchronously drive the second fan blade 52 outside to rotate through the transmission shaft 53, so that the second fan blade 52 blows air towards the heat dissipation fin assembly 3, which increases the turbulence effect of the external air and improves the heat exchange effect between the heat dissipation fin assembly 3 and the external environment, effectively improving the heat dissipation efficiency inside the sealed cavity 11. In addition, this heat dissipation enclosure does not require a fan or other forced device to blow air onto the heat dissipation fin assembly 3 outside the sealed cavity 11. The turbulence effect of the air outside the sealed cavity 11 can be achieved by setting the rotating component 5, which has the advantages of simple structure, low cost and low noise.

[0045] Optionally, in this embodiment, the cooling fan 4 and the first fan blade 51 are arranged independently and at intervals. When the cooling fan 4 is started, it can increase the turbulence effect of the gas in the sealed cavity 11, thereby blowing the first fan blade 51 in the sealed cavity 11 to rotate. Optionally, the cooling fan 4 and the first fan blade 51 are arranged opposite to each other, thereby ensuring the blowing effect of the cooling fan 4 on the first fan blade 51. In other embodiments, the cooling fan 4 and the first fan blade 51 are connected by a drive, so that the cooling fan 4 synchronously drives the first fan blade 51 to rotate during the rotation process.

[0046] Optionally, in this embodiment, the heat dissipation fin assembly 3 includes a plurality of spaced heat dissipation fins 31, each of which is disposed on the outer wall of the housing 1, effectively ensuring the heat exchange effect of the heat dissipation fin assembly 3. Optionally, in this embodiment, each heat dissipation fin 31 in the heat dissipation fin assembly 3 can be disposed on the outer wall of the housing 1 by means of bonding, key connection, pin connection, welding or bolt fastening, etc. This embodiment does not limit the specific arrangement method of the heat dissipation fins 31.

[0047] Optionally, in this embodiment, the heat dissipation fin assembly 3 and the second fan blade 52 are arranged adjacent to each other, thereby ensuring the air blowing effect of the second fan blade 52 on the heat dissipation fin assembly 3 and ensuring the heat exchange efficiency between the heat dissipation fin assembly 3 and the external environment.

[0048] Optionally, in this embodiment, as Figures 1-3 As shown, a first through hole 12 is provided on the wall of the housing 1, and the drive shaft 53 is rotatably inserted through the first through hole 12. The drive shaft 53 includes a first connecting shaft 531 and a second connecting shaft 532. The first end of the drive shaft 53 is the first connecting shaft 531, and the second end of the drive shaft 53 is the second connecting shaft 532. The first connecting shaft 531 and the second connecting shaft 532 are integrally formed. The above arrangement ensures that when the first fan blade 51 drives the first connecting shaft 531 to rotate, the first connecting shaft 531 can synchronously drive the second connecting shaft 532 and the second fan blade 52 to rotate, ensuring the reliability of the drive shaft 53 transmission, effectively ensuring the structural strength of the entire drive shaft 53, and is low in cost and easy to assemble.

[0049] Optionally, in this embodiment, the first fan blade 51 and the first connecting shaft 531 can be connected by means of key connection, pin, bonding, welding, or bolt fastening. This embodiment does not limit the specific connection method between the first fan blade 51 and the first connecting shaft 531. Optionally, in this embodiment, the specific shape of the first fan blade 51 is not limited. Optionally, in this embodiment, the second fan blade 52 and the second connecting shaft 532 can be connected by means of key connection, pin, bonding, welding, or bolt fastening. This embodiment does not limit the specific connection method between the second fan blade 52 and the second connecting shaft 532. Optionally, in this embodiment, the first fan blade 51 and the second fan blade 52 can be arc-shaped or rectangular. This embodiment does not limit the specific shapes of the first fan blade 51 and the second fan blade 52.

[0050] Optionally, in this embodiment, as Figure 3 As shown, the rotating assembly 5 also includes a first bearing 54. The outer ring of the first bearing 54 is fixed to the wall of the housing 1, and the inner ring of the first bearing 54 is fitted onto the drive shaft 53. By setting the first bearing 54, the flexibility and smoothness of the rotation of the drive shaft 53 relative to the housing 1 are ensured. It should be noted that since the specific structure and working principle of the first bearing 54 are existing technologies, they will not be described in detail here.

[0051] Optionally, in this embodiment, as Figure 3 As shown, the outer ring of the first bearing 54 is fixedly inserted into the first through hole 12.

[0052] In this embodiment, a sealant is filled between the wall of the first through hole 12 and the outer ring of the first bearing 54, thereby ensuring the sealing effect of the entire sealed cavity 11. Optionally, the outer ring of the first bearing 54 is welded to the wall of the first through hole 12, and the sealant is the solder produced by the welding connection. Optionally, in other embodiments, the outer ring of the first bearing 54 can be fixedly inserted into the first through hole 12 by bolt connection, and the sealant is in the form of a sealing strip.

[0053] like Figures 1-3 As shown, this embodiment also provides a power conversion device, which includes a heating element 2 and the aforementioned heat sink housing, with the heating element 2 housed within a sealed cavity 11. The power conversion device provided in this embodiment improves heat dissipation efficiency by utilizing the aforementioned heat sink housing, and also possesses advantages such as simple structure, low cost, and low noise.

[0054] Optionally, in this embodiment, as Figure 2 and Figure 3 As shown, the heating device 2 includes a power semiconductor device 21, which is fixed to the inner wall of the housing 1. The power semiconductor device 21 and the heat dissipation fin assembly 3 are opposite each other along the thickness direction of the housing wall of the housing 1. The installation position of the power semiconductor device 21 ensures that the power semiconductor device 21 and the heat dissipation fin assembly 3 are separated only by the housing wall of the housing 1, effectively guaranteeing the heat exchange and cooling effect of the heat dissipation fin assembly 3 on the power semiconductor device 21.

[0055] Optionally, in this embodiment, as Figure 2 As shown, the heating device 2 further includes a first heating element 22 and a second heating element 23, both of which are housed within the sealed cavity 11. Optionally, the first heating element 22 can be an inductor. Optionally, in this embodiment, the second heating element 23 can be a circuit board, a capacitor, or a reactor; the specific form of the second heating element 23 is not limited in this embodiment. In other embodiments, the heating device 2 may also include multiple other electrical components disposed within the sealed cavity 11.

[0056] Example 2

[0057] The heat dissipation box provided in this embodiment is basically the same as that in Embodiment 1. The difference between the heat dissipation box provided in this embodiment and that in Embodiment 1 is as follows:

[0058] In this embodiment, as Figure 4As shown, at least two heat dissipation fin groups 3 are spaced apart on the outer wall of the housing 1. By providing at least two heat dissipation fin groups 3, the heat dissipation efficiency of the sealed cavity 11 is further improved. Specifically, in this embodiment, two heat dissipation fin groups 3 are spaced apart on the outer wall of the housing 1, and the second fan blade 52 is located between the two heat dissipation fin groups 3. In other embodiments, multiple heat dissipation fin groups 3 may also be spaced apart on the outer wall of the housing 1, and the multiple heat dissipation fin groups 3 are arranged spaced apart around the outer periphery of the second fan blade 52.

[0059] Example 3

[0060] The heat dissipation box provided in this embodiment is basically the same as that in Embodiment 1. The difference between the heat dissipation box provided in this embodiment and that in Embodiment 1 is as follows:

[0061] In this embodiment, as Figure 5 As shown, the first bearing 54 is located outside the sealed cavity 11, and the outer ring of the first bearing 54 is fixedly connected to the outer wall of the housing 1. This arrangement allows the drive shaft 53 to pass sequentially through the inner ring of the first bearing 54 and the first through hole 12 into the sealed cavity 11. By placing the first bearing 54 outside the sealed cavity 11, it is easier to achieve the connection between the first bearing 54 and the outer wall of the housing 1.

[0062] Optionally, in this embodiment, a sealing element is filled between the wall of the first through hole 12 and the drive shaft 53, thereby ensuring the sealing effect of the entire sealed cavity 11. Optionally, in this embodiment, the sealing element is in the form of a sealing strip.

[0063] Example 4

[0064] The heat dissipation box provided in this embodiment is basically the same as that in Embodiment 1. The difference between the heat dissipation box provided in this embodiment and that in Embodiment 1 is as follows:

[0065] In this embodiment, as Figure 6 As shown, the first bearing 54 is located inside the sealed cavity 11, and the outer ring of the first bearing 54 is fixedly connected to the inner wall of the housing 1. This arrangement allows the drive shaft 53 to pass sequentially through the inner ring of the first bearing 54 and the first through hole 12, extending out of the sealed cavity 11.

[0066] Optionally, in this embodiment, a sealing element is filled between the wall of the first through hole 12 and the drive shaft 53, thereby ensuring the sealing effect of the entire sealed cavity 11. Optionally, in this embodiment, the sealing element is in the form of a sealing strip.

[0067] Example 5

[0068] The heat dissipation box provided in this embodiment is basically the same as that in Embodiment 1. The difference between the heat dissipation box provided in this embodiment and that in Embodiment 1 is as follows:

[0069] In this embodiment, as Figure 7 As shown, the first connecting shaft 531 and the second connecting shaft 532 are separately arranged and are connected in a transmission manner. Specifically, a receiving space 13 is formed on the box wall of the housing 1. The rotating assembly 5 also includes an outer magnet 55 and an inner magnet 56. The outer magnet 55 is rotatably housed in the receiving space 13 and is fixedly connected to the second connecting shaft 532. The inner magnet 56 is located inside the sealed cavity 11. The inner magnet 56 is rotatably arranged around the outer periphery of the receiving space (13) and is fixedly connected to the first connecting shaft 531. The inner magnet 56 is magnetically coupled to the outer magnet 55 through the box wall of the housing 1. The above configuration allows the cooling fan 4 to drive the first fan blade 51 within the sealed cavity 11 to rotate when it starts. During rotation, the first fan blade 51 drives the first connecting shaft 531 and the inner magnet 56 to rotate. The magnetic attraction of the inner magnet 56 can penetrate the wall of the housing 1 and simultaneously drive the outer magnet 55 to rotate, causing the outer magnet 55 to simultaneously drive the second connecting shaft 532 and the second fan blade 52 to rotate. This configuration eliminates the need for a first through hole 12 in the wall of the housing 1. The magnetic attraction between the inner magnet 56 and the outer magnet 55 allows the first connecting shaft 531 to simultaneously drive the second connecting shaft 532 to rotate relative to the sealed cavity 11, ensuring the sealing effect of the sealed cavity 11 and simplifying the structure. It should be noted that in this embodiment, the housing 1 is made of a magnetically permeable material, ensuring that the inner magnet 56 can exert a certain magnetic attraction on the outer magnet 55 through the wall of the housing 1.

[0070] Optionally, in this embodiment, the wall of the housing 1 is recessed towards the interior of the sealed cavity 11 to form an accommodating space 13, and the wall of the housing 1 forms a protrusion 14 inside the sealed cavity 11, with the inner magnet 56 rotatably surrounding the outer periphery of the protrusion 14. The above arrangement not only ensures the structural strength of the housing 1, but also facilitates the processing of the housing 1.

[0071] In this embodiment, as Figure 7 As shown, the rotating assembly 5 also includes a magnetic shielding shell 57, which covers the outer periphery of the inner magnet 56. The magnetic shielding shell 57 has a second through hole 571, and the end of the first connecting shaft 531 that rotatably passes through the second through hole 571 is fixedly connected to the first fan blade 51. By setting the magnetic shielding shell 57, not only is the inner magnet 56 protected and insulated to a certain extent, but the inner magnet 56 also avoids generating a certain magnetic attraction force on the devices inside the sealed cavity 11.

[0072] Optionally, in this embodiment, the rotating assembly 5 further includes a second bearing 58. The outer ring of the second bearing 58 is fixedly connected to the wall of the second through hole 571, and the inner ring of the second bearing 58 is fixedly connected to the first connecting shaft 531. By providing the second bearing 58, the flexibility and smoothness of the rotation of the first connecting shaft 531 relative to the magnetic shielding shell 57 are ensured. Since the specific structure and working principle of the second bearing 58 are prior art, they will not be described in detail here.

[0073] Optionally, in this embodiment, as Figure 7 As shown, the rotating assembly 5 also includes a third bearing 59. The outer ring of the third bearing 59 is fixedly connected to the opening of the accommodating space 13, and the inner ring of the third bearing 59 is fixedly fitted with a second connecting shaft 532. By setting the third bearing 59, the flexibility and smoothness of the rotation of the second connecting shaft 532 relative to the accommodating space 13 are ensured. Since the specific structure and working principle of the third bearing 59 are existing technologies, they will not be described in detail here.

[0074] Obviously, the above embodiments of this specification are merely examples for clearly illustrating the embodiments of this specification, and are not intended to limit the implementation of the embodiments of this specification. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the embodiments of this specification should be included within the protection scope of the claims of the embodiments of this specification.

Claims

1. A heat dissipating enclosure, characterized by, include: The housing (1) has a sealed cavity (11) inside, which is used to house the heating device (2). Heat dissipation fin assembly (3), the heat dissipation fin assembly (3) is disposed on the outer surface of the housing (1); A cooling fan (4), wherein the cooling fan (4) is housed within the sealed cavity (11); and The rotating assembly (5) includes a first fan blade (51), a second fan blade (52), and a drive shaft (53). The drive shaft (53) can rotate relative to the sealed cavity (11). The first fan blade (51) is located inside the sealed cavity (11). The cooling fan (4) drives the first fan blade (51) to rotate. The first end of the drive shaft (53) is located inside the sealed cavity (11) and is fixedly connected to the first fan blade (51). The second end of the drive shaft (53) is located outside the sealed cavity (11) and is fixedly connected to the second fan blade (52). The second fan blade (52) is located outside the sealed cavity (11) and blows air toward the cooling fin assembly (3).

2. The heat sink housing of claim 1, wherein, The box body (1) has a first through hole (12) on its wall, and the drive shaft (53) is rotatably inserted through the first through hole (12). The drive shaft (53) includes a first connecting shaft (531) and a second connecting shaft (532). The first end of the drive shaft (53) is the first connecting shaft (531), and the second end of the drive shaft (53) is the second connecting shaft (532). The first connecting shaft (531) and the second connecting shaft (532) are integrally formed; or, the first connecting shaft (531) and the second connecting shaft (532) are separately arranged, and the first connecting shaft (531) and the second connecting shaft (532) are connected in a drive connection.

3. The heat dissipation housing according to claim 1, characterized in that, The rotating assembly (5) also includes: The first bearing (54) has its outer ring fixed to the wall of the housing (1) and its inner ring sleeved on the drive shaft (53).

4. The heat sink housing of claim 2, wherein, The housing (1) has an accommodating space (13) formed on its wall, and the rotating assembly (5) further includes: An external magnet (55) is rotatably housed in the accommodating space (13), and the external magnet (55) is fixedly connected to the second connecting shaft (532); and An inner magnet (56) is located inside the sealed cavity (11). The inner magnet (56) is rotatably arranged around the outer periphery of the accommodating space (13). The inner magnet (56) is fixedly connected to the first connecting shaft (531). The inner magnet (56) is magnetically coupled and driven by the outer magnet (55) through the box wall of the box (1).

5. The heat sink housing of claim 4, wherein, The wall of the box (1) is recessed towards the interior of the sealed cavity (11) to form the accommodating space (13). The wall of the box (1) forms a protrusion (14) inside the sealed cavity (11). The inner magnet (56) rotates around the outer periphery of the protrusion (14).

6. The heat sink housing of claim 4, wherein, The rotating assembly (5) also includes: A magnetic shielding shell (57) is provided on the outer periphery of the inner magnet (56). A second through hole (571) is provided on the magnetic shielding shell (57). The end of the first connecting shaft (531) that rotates through the second through hole (571) is fixedly connected to the first fan blade (51).

7. The heat sink housing of claim 6, wherein, The rotating assembly (5) also includes: A second bearing (58) is provided, the outer ring of which is fixedly connected to the wall of the second through hole (571), and the inner ring of which is fixedly connected to the first connecting shaft (531); and / or The third bearing (59) has its outer ring fixedly connected to the opening of the accommodating space (13), and the inner ring of the third bearing (59) is fixedly provided with the second connecting shaft (532).

8. The heat dissipation housing according to any one of claims 1 to 7, characterized in that, At least two heat dissipation fin groups (3) are provided at intervals on the outer wall of the housing (1).

9. The heat dissipation housing according to claim 8, characterized in that, Each heat dissipation fin group (3) includes a plurality of spaced heat dissipation fins (31), and each heat dissipation fin (31) is disposed on the outer wall of the housing (1).

10. A power conversion device, characterized in that, It includes a heating element (2) and a heat dissipation housing as described in any one of claims 1 to 9, wherein the heating element (2) is housed within the sealed cavity (11).

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