Fan mounting structure and power module

Abstract

The invention provides a fan mounting structure and a power module, and belongs to the technical field of electrical equipment, and the fan mounting structure comprises a casing panel, a fan and a circuit board. Air inlet mesh holes are formed in a panel of the machine shell; the fan is located on the inner side of the machine shell panel. Four corners of the fan are respectively connected with the casing panel through vibration reduction structures; the circuit board is located on the inner side of the machine shell panel and the periphery of the draught fan and avoids the air inlet mesh holes. A vibration isolation gap exists between the circuit board and the casing panel; the circuit board is provided with a fixed area, a wiring area and an extension area; the fixing area is connected with the machine shell panel through a fastener. A wire of the fan is fixed to the inner side face of the wiring area. The fixed area and the extension area extend in different directions by taking the wiring area as a reference, and connecting lines of a central point of the fixed area, a central point of the wiring area and a central point of the extension area form a triangle. The fan wiring harness layout can be simplified, the air inlet area is guaranteed, and the air inlet amount of the radiator is increased; and moreover, the absolute reliability of the fan lead connecting point can be ensured, and the mounting stability of the fan is improved.

Description

Technical Field

[0001] This invention belongs to the field of electrical equipment technology, and more specifically, relates to a fan installation structure and power module. Background Technology

[0002] Power modules are core components of modern electrical equipment and power electronic systems, used for efficient power conversion and control. A power module typically includes power devices and a heat sink for cooling the power devices. The heat sink is equipped with a fan at its inlet or outlet, which forces cool air across the heat sink to remove the heat transferred from the power devices, thus ensuring the power module operates within a safe temperature range.

[0003] In existing technologies, the wind turbine is connected to the power amplifier board inside the power module via wires, which results in complex wiring. Moreover, the vibration of the wind turbine during operation can cause the complex wiring to loosen at the connection points due to continuous vibration, leading to poor overall installation stability of the wind turbine. Summary of the Invention

[0004] The purpose of this invention is to provide a wind turbine installation structure and power module, which aims to solve the technical problems of complex wind turbine wiring and poor wire connection stability caused by vibration in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a fan installation structure, comprising: The casing panel is provided with air inlet mesh; the inward and outward directions of the casing panel are defined as the first direction; A fan is located inside the housing panel and corresponds directly to the air inlet mesh in the first direction; the four corners of the fan are connected to the housing panel via vibration damping structures; and A circuit board is located on the inner side of the housing panel and the periphery of the fan, and avoids the air inlet mesh; in the first direction, there is a vibration isolation gap between the circuit board and the housing panel; the circuit board has a fixing area, a wiring area and an extension area; the fixing area is connected to the housing panel by fasteners; the fan wires are fixed on the inner side of the wiring area; The fixed area and the extended area extend in different directions based on the wiring area, and the line connecting the center point of the fixed area, the center point of the wiring area and the center point of the extended area forms a triangle.

[0006] The beneficial effects of the fan installation structure provided by the present invention are as follows: Compared with the prior art, in the fan installation structure of the present invention, the fan is connected to the circuit board by wires. The fan wires are hidden in the narrow interlayer space formed by the housing panel, the circuit board and the fan itself. From the perspective of the whole machine, the fan wiring harness layout becomes simple and neat, and there is no need for long-distance lead wires.

[0007] The circuit board avoids the air inlet mesh, thus preserving the air intake area and allowing cool air to pass smoothly through the mesh and be drawn into the fan. The fan's wires connect to the inner side of the circuit board's wiring area, and the wire placement and connection points are far from the fan's ventilation duct. Throughout the entire path of airflow from entering the mesh to being drawn into the fan impeller, there will be no collision, friction, or eddy currents with any cables, effectively protecting the wiring system and preventing potential malfunctions caused by airflow erosion and dust accumulation.

[0008] The four corners of the fan are connected to the casing panel through a vibration damping structure. The vibration damping structure effectively isolates and absorbs most of the vibration generated by the fan operation, prevents the vibration from being directly transmitted to the casing panel, and ensures that the fan remains stable in a vibrating environment.

[0009] Even if some vibration is transmitted to the chassis panel, the vibration isolation gap between the circuit board and the chassis panel ensures that the circuit board, except for the fixed area, does not directly contact the vibrating chassis panel. This prevents vibration from being directly transmitted from the panel to the circuit board, protects the stability of the wire connections in the wiring area, and extends the service life of the electronic components on the circuit board.

[0010] Even if some vibrations from the housing panel are transmitted to the fixed area of ​​the circuit board through fasteners, since the fixed area and the extension area extend in different directions based on the wiring area, the extension area can change and optimize the transmission path of vibration energy. Through its own stiffness and mass, it can suppress the overall vibration of the circuit board, thereby preventing the vibration from being amplified in the wiring area, making the wiring area stable and not prone to shaking or deformation, thus ensuring the absolute reliability of the wire connection points.

[0011] In one possible implementation, the direction perpendicular to the first direction is defined as the second direction, and multiple fans are provided and distributed at intervals along the second direction; The circuit board has multiple wiring areas, multiple fixing areas, and multiple extension areas; the multiple wiring areas and multiple fixing areas correspond one-to-one, and each pair of adjacent wiring areas are connected by an extension area. The wiring area and the corresponding fixing area form a branch, and in the second direction, each fan has at least one branch on one side.

[0012] Each wiring area is equipped with a fixed area. The vibration sources of two adjacent wiring areas are separated, and the wiring area is supported by the corresponding fixed area, which can ensure the stability of the wiring area position, reduce the amplitude, and thus ensure the stability of the wire solder joint.

[0013] Each pair of adjacent wiring zones is connected by an extension zone. This extension zone not only alters and optimizes the vibration energy transmission path but also serves as a bridge connecting the various independent branches. The extension zone can also carry the common power and signal lines to all wind turbines. Power and signals can be input from one end of the circuit board and then laid out like a bus along the backbone path formed by the extension zones before being distributed to the various wiring zones, achieving extreme simplification and high integration of circuit wiring.

[0014] In one possible implementation, the extension area extends along the second direction and corresponds directly to one side edge of the fan in the first direction; A direction perpendicular to both the first and second directions is defined as a third direction, and the branch extends along the third direction; in the third direction, the height of the extension area is 1 / 5 to 1 / 3 of the height of the branch, and the height of the branch is 1 / 3 to 2 / 3 of the height of the fan.

[0015] The extension area extends along the second direction, while the branch extends along the third direction, simplifying the circuit board structure, making the circuit board partitions clearer, the wiring logic more concise, and facilitating later maintenance and diagnosis. Furthermore, the branch is located beside the fan, minimizing its proximity to the main air intake or exhaust ducts, ensuring smooth airflow for heat dissipation.

[0016] The height of the branch section is 1 / 3 to 2 / 3 of the height of the fan. This ensures that the branch section has sufficient bending section modulus in the third direction and that the fixed area is close to or corresponds to the centerline of the air inlet mesh in the second direction. This further reduces the vibration energy transmitted from the casing panel to the fixed area through the fasteners.

[0017] The extension area is 1 / 5 to 1 / 3 the height of the branch, which ensures that the extension area has the necessary longitudinal stiffness to suppress overall torsion, while saving the space occupied by the circuit board in the third direction and ensuring the integration of the circuit board and the housing panel.

[0018] In one possible implementation, multiple air inlet meshes are spaced apart along the second direction, and the multiple air inlet meshes correspond one-to-one with the multiple fans in the first direction; In the second direction, a clearance area is formed on the side of each of the air inlet mesh holes on the housing panel, and the clearance area is connected to the fixing area by the fastener.

[0019] The air intake on the casing panel is divided into multiple independent air intake meshes that correspond one-to-one with the fans. Each fan has its own dedicated air intake, ensuring that cooling air is guided to the inlet of each fan in the most efficient way, reducing crosstalk, eddies and pressure loss of airflow inside the casing.

[0020] The clearance area provides a mounting platform for fasteners, ensuring maximum connection strength between the mounting area and the housing panel.

[0021] In some embodiments, a direction perpendicular to both the first and second directions is defined as a third direction; in the third direction, the height of the air inlet mesh is 2 / 3 to 4 / 5 of the height of the housing panel.

[0022] The air inlet mesh occupies most of the height of the casing panel, ensuring that there are almost no blind spots in front of the fan. Cooling air can smoothly enter from most areas of the casing panel, providing the fan with sufficient and uniform airflow.

[0023] In one possible implementation, there is a sheltered space between every two adjacent wind turbines; the plurality of branch sections are a plurality of first branch sections and a second branch section arranged sequentially along the second direction; in the first direction, the plurality of first branch sections correspond one-to-one with the plurality of sheltered spaces; One of the fans located at the end is defined as the end fan. The second branch is located beside the end fan, and the wires of the end fan are fixed in the wiring area of ​​the second branch. The wires of the remaining fans are fixed in the wiring areas of the plurality of first branches.

[0024] Each fan is equipped with a branch unit on its side. The mounting area of ​​this branch unit is directly installed on the casing panel, and its wiring area is specifically designed to secure the fan's wiring. This creates a one-to-one vibration management and absorption unit. The energy from any fan vibration is quickly dissipated, ensuring that each wiring area is in a relatively clean vibration environment, thus improving reliability.

[0025] In some embodiments, the second branch is further provided with a main operating area, which is used to connect the main cable.

[0026] The main operating area is used to integrate the wiring of all the fans and connect them to the power amplifier board of the power module. Alternatively, it is used to gather all the main cables from the host equipment or the upper-level control system, such as power supply, ground wire, speed control signal, and fault feedback signal, into a unified external interface, completely eliminating messy wiring harnesses.

[0027] In one possible implementation, the housing panel includes: The main panel body has the aforementioned air inlet mesh; and A connecting bracket is attached to the outer periphery of the panel body and extends inward to the inner side of the panel body; the connecting bracket avoids the air inlet mesh; the four corner points of the fan are respectively fixed to the connecting bracket by the vibration damping structure; In the first direction, there is a vibration damping space between the outer end face of the fan and the inner side of the panel body.

[0028] The main panel serves as both the functional and aesthetic surface of the casing. The connecting bracket acts as the structural framework and vibration transmission medium for the casing panel. Extending inwards from the outer perimeter of the main panel, the connecting bracket cleverly avoids the air intake mesh area. The vibration-damping structure can be securely screwed onto the robust connecting bracket, thus achieving maximum connection rigidity and reliability.

[0029] In some embodiments, the connecting bracket includes: The first inner extension plate is formed on one side edge of the inner side of the panel body and extends along the second direction; the inner end of the first inner extension plate is provided with a plurality of first flanges, and the plurality of first flanges are spaced apart along the second direction. The second inner extension plate is parallel to the first inner extension plate, formed on the other side edge of the inner side of the panel body, and extends along the second direction; the inner end of the second inner extension plate is provided with a plurality of second flanges, and the plurality of second flanges are spaced apart along the second direction. In this configuration, for any one of the wind turbines, two of its corners are fixed to the same first flange by the vibration damping structure, and the other two corners are fixed to two adjacent second flanges by the vibration damping structure.

[0030] The shared second flange naturally bears the load from the wind turbines on both sides, making the force flow transmission smoother. For the entire wind turbine array, the number of support points is optimized, and when individual support points experience minor deformation or loosening, the overall stability can be maintained through the redistribution of internal forces, improving fault tolerance and reliability.

[0031] The present invention also provides a power module, comprising: The casing has a closed inner cavity; A radiator, located within the housing, having a ventilation duct that is not connected to the enclosed cavity; and The aforementioned fan mounting structure is connected to one end of the radiator.

[0032] The power module provided by this invention, by adopting the above-mentioned fan installation structure, can simplify the fan wiring harness layout, ensure the air intake area, and increase the air intake volume of the radiator; moreover, it can ensure the absolute reliability of the fan wire connection points and improve the stability of the fan installation. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of the fan installation structure provided in an embodiment of the present invention. Figure 1 ; Figure 2 A schematic diagram of the fan installation structure provided in an embodiment of the present invention. Figure 2 ; Figure 3 This is an exploded structural diagram of the fan installation structure provided in an embodiment of the present invention; Figure 4 for Figure 1 The right view; Figure 5 This is a schematic diagram of the casing panel of the fan mounting structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the circuit board structure of the fan mounting structure provided in an embodiment of the present invention; Figure 7 A schematic diagram of the power module provided in an embodiment of the present invention (the housing is not shown in the figure).

[0035] In the picture: 1. Casing panel; 11. Panel body; 111. Air inlet mesh; 112. Clearance area; 12. Connecting bracket; 121. First inner extension plate; 122. First flange; 123. Second inner extension plate; 124. Second flange; 2. Fan; 21. Vibration damping structure; 3. Circuit board; 31. Fixing area; 32. Wiring area; 33. Extension area; 34. First branch; 35. Second branch; 351. Main operation area; 4. Fasteners; 5. Radiator. Detailed Implementation

[0036] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0037] Please refer to the following: Figures 1 to 7The fan mounting structure provided by the present invention will now be described. The fan mounting structure includes a housing panel 1, a fan 2, and a circuit board 3. The housing panel 1 is provided with an air inlet mesh 111; the inner and outer directions of the housing panel 1 are defined as the first direction; the fan 2 is located on the inner side of the housing panel 1 and is directly opposite to the air inlet mesh 111 in the first direction; the four corners of the fan 2 are respectively connected to the housing panel 1 through vibration damping structures 21; the circuit board 3 is located on the inner side of the housing panel 1 and the outer periphery of the fan 2, and avoids the air inlet mesh 111; there is a vibration isolation gap between the circuit board 3 and the housing panel 1 in the first direction; the circuit board 3 has a fixing area 31, a wiring area 32 and an extension area 33; the fixing area 31 is connected to the housing panel 1 by fasteners 4; the wires of the fan 2 are fixed on the inner side of the wiring area 32; wherein, the fixing area 31 and the extension area 33 extend in different directions with the wiring area 32 as the reference, and the line connecting the center point of the fixing area 31, the center point of the wiring area 32 and the center point of the extension area 33 forms a triangle.

[0038] Both the fan 2 and the circuit board 3 are located inside the housing panel 1. The housing panel 1 serves a decorative purpose, but it also acts as the mounting base for the fan 2 and the circuit board 3. It should be noted that the terms "inner" and "outer" refer to the orientation of the power module after the fan mounting structure is assembled to the power module. The direction towards the inside of the power module is considered "inner," and the direction towards the outside of the power module is considered "outer." In addition to defining the first direction, this embodiment also defines a second direction and a third direction. The first, second, and third directions are mutually perpendicular, and both the second and third directions are parallel to the surface of the housing panel 1.

[0039] The fan 2 is located at one end of the radiator 5 in the power module, and is used to supply air to the radiator 5 or draw hot air from the radiator 5. The fan 2 is generally a cube structure with four corner points. The four corner points are fixed to the housing panel 1 by a vibration damping structure 21, which is used to isolate the vibration generated when the fan 2 is running. Preferably, the vibration damping structure 21 can be a vibration damping screw, which can both fix the fan 2 and provide vibration damping.

[0040] It should be noted that the four vibration damping structures 21 can significantly reduce the vibration transmitted from the fan 2 to the casing panel 1.

[0041] The fan 2 is an electrically powered component that requires external electrical energy to rotate and generate forced airflow. Therefore, the fan 2 must have a conductor. One end of the conductor is welded and fixed to the inner side of the wiring area 32. It should be noted that the conductor must have an arc structure with a drooping section, and cannot be a straight structure, so as to prevent the vibration force from being directly transmitted to the welded point of the conductor when the fan 2 vibrates.

[0042] In the prior art, wires are generally fixed to the circuit board 3 by pin insertion, with the pins passing through the circuit board 3 and glue applied to the back of the circuit board 3 for fixation. In this embodiment, since the back (i.e., the outer side) of the circuit board 3 faces the housing panel 1, the vibration isolation gap between the two is small, making it impossible to complete the glue application operation. Therefore, spot welding is used to directly fix it to the inner side of the wiring area 32.

[0043] Circuit board 3 is located on the inner side of housing panel 1 and the axial periphery of fan 2, avoiding the air inlet mesh 111. Circuit board 3 does not block the air inlet mesh 111, so the air intake area is not sacrificed, and cold air can pass smoothly through the mesh and be drawn into fan 2. Moreover, the wires of fan 2 are soldered to the inner side of the connector, and the wiring position and connection point of the wires are far away from the ventilation duct of fan 2. On the one hand, the airflow will not collide, rub or generate eddies with any cables on the entire path from entering the mesh to being drawn into the impeller of fan 2; on the other hand, it effectively protects the wiring system and avoids potential failures caused by airflow scouring, dust accumulation and vibration, thus extending the life of fan 2 system.

[0044] The circuit board 3 is located inside the housing panel 1 and is parallel to the surface of the housing panel 1. In the first direction, there is a vibration isolation gap between the circuit board 3 and the housing panel 1. That is to say, the housing panel 1 and the circuit board 3 are not in contact or attached. Therefore, the external force on the housing panel 1 will not be directly transmitted to the entire circuit board 3, which can further reduce the vibration transmitted to the circuit board 3. The vibration can only be transmitted to the corresponding fixed area 31 through the fastener 4.

[0045] Circuit board 3 has a fixing area 31, a wiring area 32, and an extension area 33. It should be noted that... Figure 6 The two sets of dashed boxes in the text represent the wiring area 32 and the fixing area 31, respectively. The dashed boxes are only used to indicate the wiring position of the wires / fixing position of the fastener 4, and do not actually exist.

[0046] If circuit board 3 only has a fixed area 31 and a wiring area 32, since there is a gap between the wiring area 32 and the housing panel 1, a cantilever beam structure is formed from the wiring area 32 to the fixed area 31. If some vibration of the housing panel 1 is still transmitted to the fixed area 31 through the fastener 4, the free end of the cantilever beam (i.e., the wiring area 32) will generate a larger amplitude than the fixed area 31, which will aggravate the vibration of the wire connection point.

[0047] This embodiment, by incorporating extension region 33, forms a non-cantilevered plate-like structure with bending and damping characteristics together with fixed region 31 and wiring region 32. The triangular layout of fixed region 31, wiring region 32, and extension region 33 transforms the originally simple cantilever beam into a continuous structure with greater stiffness and more complex modes in a two-dimensional plane. Since fixed region 31 and extension region 33 extend in different directions based on wiring region 32, extension region 33 acts like a balancing block or additional support, altering the centroid distribution and stiffness matrix of circuit board 3.

[0048] The circuit board 3 features an extension area 33, which increases its overall natural frequency. According to vibration theory, when the natural frequency of a structure is much higher than the excitation frequency, its dynamic response (amplitude) will be very small. The main energy of the fan 2's vibration is usually in the low-frequency range. Increasing the natural frequency of the circuit board 3 allows it to avoid the main excitation frequency, thus achieving vibration isolation rather than amplifying the vibration. This allows the wiring area 32 to remain relatively stable when subjected to vibration transmission from the fixed area 31.

[0049] Furthermore, even if the housing panel 1 transmits vibration to the fixing area 31 via the fastener 4, the vibration stress will be transmitted and dispersed in both directions, namely the wiring area 32 and the extension area 33, rather than being concentrated on the wiring area 32, thus greatly reducing the vibration of the wiring area 32. This also prevents the circuit board 3 from cracking or being damaged due to fatigue, improving long-term reliability.

[0050] The line connecting the center point of the fixed area 31, the center point of the wiring area 32, and the center point of the extension area 33 forms a triangle. Preferably, the triangle is an obtuse triangle or a right triangle, and the center point of the wiring area 32 is the obtuse angle point of the obtuse triangle or the right angle point of the right triangle.

[0051] The fan installation structure provided by this invention has the following advantages compared with the prior art: 1. The fan 2 is connected to the circuit board 3 by wires. The wires of the fan 2 are hidden in the narrow space formed by the housing panel 1, the circuit board 3 and the fan 2 itself. From the perspective of the whole machine, the wiring harness layout of the fan 2 becomes simple and neat, and there is no need for long-distance lead wires.

[0052] Second, circuit board 3 avoids the air inlet mesh 111, thus not sacrificing the air intake area. Cold air can pass smoothly through the mesh and be drawn into the fan 2. The wires of the fan 2 are connected to the inner side of the wiring area 32 of circuit board 3. The wiring position and connection point are far away from the ventilation duct of the fan 2. The airflow will not collide, rub, or generate eddies with any cables throughout its entire path from entering the mesh to being drawn into the impeller of the fan 2, effectively protecting the wiring system and avoiding potential failures caused by airflow scouring and dust accumulation.

[0053] Third, the four corners of the fan 2 are connected to the casing panel 1 through the vibration damping structure 21. The vibration damping structure 21 effectively isolates and absorbs most of the vibration generated by the operation of the fan 2, prevents the vibration from being directly transmitted to the casing panel 1, and ensures that the fan 2 can remain stable in the vibration environment.

[0054] Even if some vibration is transmitted to the housing panel 1, the vibration isolation gap between the circuit board 3 and the housing panel 1 ensures that the circuit board 3, except for the fixed area 31, does not directly contact the vibrating housing panel 1. This prevents vibration from being directly transmitted from the panel to the circuit board 3, protects the stability of the wire connection on the wiring area 32, and extends the service life of the electronic components on the circuit board 3.

[0055] Even if some vibration of the housing panel 1 is transmitted to the fixing area 31 of the circuit board 3 through the fastener 4, since the fixing area 31 and the extension area 33 extend in different directions based on the wiring area 32, the extension area 33 can change and optimize the transmission path of vibration energy. It can suppress the overall vibration of the circuit board 3 through its own stiffness and mass, thereby preventing the vibration from being amplified in the wiring area 32. This makes the wiring area 32 stable and less prone to shaking or deformation, ensuring the absolute reliability of the wire connection point and improving the stability of the fan 2 installation.

[0056] IV. The casing panel 1, circuit board 3, and fan 2 can be pre-assembled and tested as a module. During the final assembly of the entire machine, only this module needs to be fixed and its external interface connected, improving production efficiency. When maintenance is required, the entire module can be quickly removed for replacement or repair, reducing maintenance time and costs.

[0057] In some embodiments, the above-described fan mounting structure may also adopt the following... Figure 1 , Figure 2 and Figure 3 The structure shown is described in the following document. Figure 1 , Figure 2 and Figure 3 The direction perpendicular to the first direction is defined as the second direction. Multiple fans 2 are provided and are distributed at intervals along the second direction. The circuit board 3 has multiple wiring areas 32, multiple fixing areas 31 and multiple extension areas 33. The multiple wiring areas 32 and multiple fixing areas 31 correspond one-to-one, and each pair of adjacent wiring areas 32 are connected by an extension area 33. The wiring areas 32 and the corresponding fixing areas 31 form branches. In the second direction, each fan 2 has at least one branch on one side.

[0058] The power module is generally a hexahedral structure resembling a box. Its heat sink 5 is flat, with its length and width much greater than its thickness, while the fan 2 is generally a cube. To ensure uniform airflow on the inlet / outlet surfaces of the heat sink 5, it is typically equipped with multiple fans 2. The outer diameter of the fan 2 is slightly larger than the thickness of the heat sink 5, and the combined length of multiple fans 2 is approximately equal to or slightly less than the end face length of the heat sink 5. Multiple fans 2 arranged side-by-side can create a uniform and stable airflow pressure distribution on the inlet / outlet surfaces of the heat sink 5, helping to evenly remove heat from the entire surface of the heat sink 5 and avoiding the localized overheating problem that might occur with a single fan 2, where the airflow is strong in the center and weak on the sides.

[0059] Each fan 2 has a branch on at least one side. Specifically, adjacent fans 2 can be grouped together and share a branch, or each fan 2 can be equipped with an independent branch. Since the fixed area 31 is the vibration source of the circuit board 3, the wiring area 32 and the corresponding fixed area 31 form a branch. That is, each wiring area 32 is equipped with a fixed area 31. The vibration sources of two adjacent wiring areas 32 are separated, and the wiring area 32 is supported by the corresponding fixed area 31, which can ensure the stability of the wiring area 32, reduce the amplitude, and thus ensure the stability of the wire solder joint.

[0060] Furthermore, each pair of adjacent wiring zones 32 is connected by an extension zone 33. The extension zone 33 not only changes and optimizes the vibration energy transmission path but also serves as a bridge connecting the various independent branches. All branches and all extension zones 33 together form a rigid grid-like circuit board 3 structure. This gives the circuit board 3 extremely high rigidity and stability, effectively resisting complex excitations from multiple vibration sources and suppressing torsion and resonance across the entire board surface.

[0061] In addition, extension area 33 can also carry common power and signal lines to all wind turbines 2. Power and signals can be input from one end of circuit board 3, and then laid out like a bus along the backbone path formed by extension area 33, and then distributed to each wiring area 32, achieving extreme simplification and high integration of circuit wiring.

[0062] Traditional fan 2 wiring requires a significant amount of space; the wire harness itself has volume, and its bending and fixing also require reserved space. This makes the wiring structure bulky and may encroach on the air duct. This embodiment uses the extension area 33 to flatten the wire path and integrate it inside the circuit board 3, greatly compressing the three-dimensional space occupied by electrical connections. This removes obstacles to unobstructed airflow and increases the air intake area of ​​fan 2 compared to traditional wiring.

[0063] The large air intake area ensures the use of a high-power fan 2. In a low-resistance system, the high-power fan 2 can convert almost all of its power into usable airflow and air pressure, resulting in a non-linear increase in heat dissipation capacity. Once the heat dissipation capacity of a single fan 2 becomes sufficiently powerful due to the above optimizations, fewer fans 2 can be used to achieve the same heat dissipation goal. Furthermore, a smaller number of fans 2 allows for greater spacing between them, making it easier to assemble the circuit board 3 and perform soldering operations on the wires to the circuit board 3.

[0064] In some embodiments, the extension region 33 and the branch portion may adopt the following... Figure 3 and Figure 6 The structure shown is described in the following document. Figure 3 and Figure 6 The extension area 33 extends along the second direction and corresponds to one side edge of the fan 2 in the first direction; the direction perpendicular to both the first and second directions is defined as the third direction, and the branch extends along the third direction; in the third direction, the height of the extension area 33 is 1 / 5 to 1 / 3 of the height of the branch, and the height of the branch is 1 / 3 to 2 / 3 of the height of the fan 2.

[0065] The air intake mesh 111 on the housing panel 1 corresponds directly to the fan 2 in orthographic projection. If the extension area 33 of the circuit board 3 is also projected into this area, it will directly block part of the mesh, reduce the air intake area, reduce the heat dissipation efficiency, and the air intake will also cause the extension area 33 to vibrate.

[0066] In this embodiment, by precisely aligning the extension area 33 with the side edge of the fan 2, it ensures that the extension area 33 completely avoids the area directly opposite the air inlet mesh 111 in three-dimensional space. This allows cooling air to pass through the air inlet mesh 111 without obstruction, directly entering the fan 2 and being blown towards the radiator 5, ensuring the maximum ventilation area in the design theory. On the other hand, the corner between the side edge of the fan 2 and the casing panel 1 is a quiet area that contributes little to the core airflow. Placing the extension area 33 here is equivalent to embedding the functional component into a structural dead corner, achieving the ultimate utilization of space.

[0067] The extension area 33 extends along the second direction, and the branch extends along the third direction. That is to say, the extension and the branch are set perpendicularly, which simplifies the structure of the circuit board 3, makes the partitions of the circuit board 3 clearer, the wiring logic clearer, and also facilitates later maintenance and diagnosis. Moreover, the branch is located on the side of the fan 2, avoiding the main air intake or exhaust ducts to the greatest extent, ensuring the smooth flow of heat dissipation airflow.

[0068] Based on the above layout, the height of the branch section is 1 / 3 to 2 / 3 of the height of the fan 2. Using these parameters, on the one hand, it ensures that the branch section is a plate-like structure, guaranteeing sufficient bending section modulus in the third direction to stably resist vibrations from the fan 2 and providing a stable mounting surface for the wiring area 32. On the other hand, it simplifies the assembly of the circuit board 3 and the housing panel 1, and ensures that the fixing area 31 is close to or corresponds to the centerline of the air inlet mesh 111 in the second direction. Since the four corners of the fan 2 are connected to the housing panel 1 through the vibration damping structure 21, the vibration at the center point of the air inlet mesh 111 is smaller than that at the edge. The fact that the fixing area 31 is close to or corresponds to the centerline of the air inlet mesh 111 in the second direction further reduces the vibration energy transmitted from the housing panel 1 to the fixing area 31 through the fasteners 4.

[0069] The height of the extension zone 33 is 1 / 5 to 1 / 3 of the height of the branch. As a bridge connecting multiple separate branches, the primary task of the extension zone 33 is to ensure integrity in the second direction. Using the above parameters ensures that the extension zone 33 possesses the necessary longitudinal stiffness, tightly connecting the various branches to form a unified rigid frame and suppressing overall torsion. Furthermore, the height of the extension zone 33 is significantly less than the height of the branch, ensuring that the extension zone 33 faces the edge of the fan 2 directly, and saving space occupied by the circuit board 3 in the third direction, thus ensuring integration of the circuit board 3 and the housing panel 1.

[0070] In some embodiments, the aforementioned air inlet mesh 111 can be adopted as follows: Figure 1 and Figure 2 The structure shown is described in the following document. Figure 1 and Figure 2 Multiple air inlet meshes 111 are spaced apart along the second direction, and the multiple air inlet meshes 111 correspond one-to-one with the multiple fans 2 in the first direction; in the second direction, a clearance area 112 is formed on the side of each air inlet mesh 111 on the housing panel 1, and the clearance area 112 is connected to the fixing area 31 by fasteners 4.

[0071] The air intake of the casing panel 1 is divided into multiple independent air intake meshes 111, each corresponding to one of the fans 2. Each fan 2 has its own dedicated air intake, ensuring that cooling air is guided to the inlet of each fan 2 with maximum efficiency, reducing crosstalk, eddies, and pressure loss of airflow inside the casing. Furthermore, it makes the airflow path shorter and more direct, with lower flow resistance, thereby achieving a larger effective airflow with the same power consumption of the fans 2, and improving the overall heat dissipation efficiency.

[0072] Compared to large open mesh areas, the multiple small mesh openings separated by solid material also enhance the structural rigidity of the housing panel 1 in the second direction. The solid areas form reinforcing ribs, preventing the housing panel 1 from vibrating violently under vibration and wind pressure. A more robust and less deformable housing panel 1 provides a more stable mounting base for the vibration damping structure 21 of the fan 2 and the fixing area 31 of the circuit board 3, reducing vibration input to the circuit board 3 assembly at the source.

[0073] In the second direction, clearance areas 112 are formed on the side of each air inlet mesh 111 on the housing panel 1. The clearance areas 112 provide an installation platform for the fasteners 4, ensuring maximum connection strength between the fixing area 31 and the housing panel 1, and avoiding problems such as weak engagement and easy loosening caused by installation on the mesh area. The flat surface of the clearance areas 112 allows the fixing area 31 of the circuit board 3 to make surface contact with the housing panel 1, ensuring the stability of the connection and providing an ideal path for vibration transmission.

[0074] Preferably, the fixed position of the avoidance area 112 is located on the structural centerline of the housing panel 1 in the second direction. Therefore, the fixed areas 31 of each branch on the circuit board 3 can be arranged along this centerline. The centerline of the housing panel 1 is the area with the greatest bending and torsional stiffness and the least deformation. When the housing panel 1 deforms due to residual vibration, the points on the centerline mainly experience translation in the third direction, while the edge areas will experience significant torsional and bending deformation. Setting the fixed point on the centerline means that the basic vibration experienced by the fixed area 31 is mainly integral and in-phase translation, which is much easier to suppress and resolve by the structure of the circuit board 3 itself than the complex composite vibration with phase difference transmitted from different stiffness points of the housing panel 1.

[0075] In some embodiments, the aforementioned air inlet mesh 111 can also be as follows: Figure 1 , Figure 3 and Figure 5 The structure shown is described in the following document. Figure 1 , Figure 3 and Figure 5 On the third side, the height of the air inlet mesh 111 is 2 / 3 to 4 / 5 of the height of the housing panel 1.

[0076] The air intake mesh 111 occupies most of the height of the casing panel 1. The size of the cooling airflow directly depends on the area and efficiency of the air intake. The extremely high proportion of 2 / 3 to 4 / 5 ensures that there are almost no blind spots in front of the fan 2. Cooling air can smoothly enter from most of the area of ​​the casing panel 1, providing the fan 2 with sufficient and uniform airflow, fundamentally guaranteeing the theoretical maximum capacity of the heat dissipation system.

[0077] In addition, the casing panel 1 retains a small solid area, which forms the high-strength frame on both sides. These retained solid frames provide the installation base for the fan 2.

[0078] In some embodiments, the aforementioned branch may adopt the following form: Figure 3 and Figure 6 The structure shown is described in the following document. Figure 3 and Figure 6 There is a sheltered space between each pair of adjacent fans 2; the multiple branch sections are multiple first branches 34 and a second branch 35 arranged sequentially along the second direction; in the first direction, the multiple first branches 34 correspond one-to-one with the multiple sheltered spaces; a fan 2 located at the end is defined as the end fan 2, the second branch 35 is located beside the end fan 2, and the wires of the end fan 2 are fixed in the wiring area 32 of the second branch 35; the wires of the remaining fans 2 are fixed one-to-one in the wiring area 32 of the multiple first branches 34.

[0079] Each fan 2 is equipped with a branch on its side. The fixing area 31 of this branch is directly mounted on the housing panel 1, and its wiring area 32 is specifically used to fix the wires of the fan 2. This creates a one-to-one vibration management and absorption unit. The energy of any vibration of the fan 2 is quickly dissipated through the following two paths: First, it is transmitted to the housing panel 1 through the vibration damping structure 21 and absorbed by the rigidity of the panel. Second, it is transmitted to its dedicated branch through the wires and then neutralized by the triangular structure of the branch (fixed area 31 - wiring area 32 - extension area 33). The above structure effectively prevents the vibrations of multiple fans 2 from superimposing and coupling on the circuit board 3, avoiding the formation of complex overall vibration modes, thereby ensuring that each wiring area 32 is in a relatively pure vibration environment and improving reliability.

[0080] The first branch 34 is precisely positioned in the sheltered space between two adjacent fans 2. The sheltered space itself is an inefficient area or vortex area in airflow dynamics. The arrangement of the branch does not sacrifice any effective ventilation area. Moreover, in conjunction with the position of the extension area 33, the entire circuit board 3 is tightly wrapped and embedded around the array of fans 2, achieving zero waste in three-dimensional space. While ensuring the ultimate heat dissipation airflow, all electrical connections and fixing functions are completed.

[0081] From an assembly and maintenance perspective, each fan 2 is equipped with a branch point on its side. Operators do not need to judge complex wiring paths; they can simply connect the wires of the fan 2 in front of them to the nearest wiring area 32. This greatly simplifies the operation, avoids incorrect wiring, and improves assembly efficiency and first-pass yield. Similarly, during later maintenance, if it is necessary to replace a fan 2, operators can clearly and independently handle the connection points related to that fan 2 without disturbing the entire circuit board 3 or the wiring of other fan 2s.

[0082] Preferably, based on the above embodiment, the second branch 35 is further provided with a main operation area 351, which is used to connect the main cable.

[0083] The main operating area 351 is used to integrate the wiring of all fans 2 and connect it to the power amplifier board of the power module, or to gather all the main cables such as power supply, ground wire, speed control signal, and fault feedback signal from the host equipment (or the upper control system) into a unified external interface, completely eliminating messy wiring harnesses.

[0084] The second branch 35 is located beside the end fan 2, which is usually the most accessible and operable location during the assembly and maintenance of the entire module. Operators do not need to search for multiple scattered access points inside the complex equipment; all internal and external cable connections can be completed at the end of the module, which improves assembly speed and makes it exceptionally convenient to replace the entire fan 2 module or perform circuit diagnostics later, simply by disconnecting / connecting the interface at this one point.

[0085] The main cables are typically thicker and heavier, requiring higher reliability at their connection points. By placing the main operating area 351 at the second branch 35 at the end, rather than at a central first branch 34, it is located at the end of the fan array 2, minimizing the combined impact of vibration excitation from multiple fans 2. Furthermore, the end structure often receives additional support from other side plates of the casing, resulting in better rigidity and lower vibration amplitude.

[0086] In some embodiments, the aforementioned housing panel 1 may be adopted as follows: Figure 2 , Figure 4 and Figure 5 The structure shown is described in the following document. Figure 2 , Figure 4 and Figure 5The housing panel 1 includes a panel body 11 and a connecting bracket 12. The panel body 11 has an air inlet mesh 111; the connecting bracket 12 is connected to the outer periphery of the panel body 11 and extends inward to the inner side of the panel body 11; the connecting bracket 12 avoids the air inlet mesh 111; the four corners of the fan 2 are respectively fixed to the connecting bracket 12 by vibration damping structures 21; wherein, in the first direction, there is a vibration damping space between the outer end face of the fan 2 and the inner side face of the panel body 11.

[0087] The main panel 11 is the functional and aesthetic surface of the casing panel 1. The air intake mesh 111 on the main panel 11 is the only inlet for cooling air. Its position, size, and distribution determine the efficiency and smoothness of the heat dissipation airflow. Concentrating the air intake function on the main panel 11 makes the airflow design more efficient.

[0088] The connecting bracket 12 serves as the structural framework and vibration transmission medium for the housing panel 1. Extending inward from the outer periphery of the panel body 11, the connecting bracket 12 cleverly avoids the area of ​​the air inlet mesh 111. This means it provides a clean and complete mounting surface for the fan 2. The vibration damping structure 21 can be securely screwed onto the robust connecting bracket 12, rather than onto the perforated mesh, thus achieving maximum connection rigidity and reliability.

[0089] The vibration of the fan 2 is first transmitted to the connecting bracket 12 through the vibration damping structure 21, rather than directly to the panel body 11. The connecting bracket 12, as a relatively independent internal frame, bears these vibrations. Since the connecting bracket 12 is peripherally connected to the panel body 11, its contact area is much smaller than the entire plane. This connection method itself has a certain degree of flexibility, which can filter and attenuate the vibration energy transmitted from the bracket to the panel body 11.

[0090] The connecting bracket 12 also distributes the load from multiple fans 2 to the entire peripheral frame of the panel body 11, avoiding local deformation of the panel body 11 and ensuring the flatness and stability of the entire installation platform.

[0091] Since the fan 2 is fixed to the connecting bracket 12, there is a vibration damping space between the outer end face of the fan 2 and the inner side of the panel body 11. Without this space, the outer end face of the fan 2 might directly impact or press against the panel body 11 during vibration. This would create a rigid vibration transmission path, significantly reducing the effectiveness of the vibration damping structure 21, and the vibration would be directly transmitted to the panel body 11, generating noise and radiating outwards. The existence of the vibration damping space ensures that no matter how slightly the fan 2 oscillates or deforms during vibration, it will never physically come into contact with the panel body 11. This fundamentally cuts off this direct vibration transmission path.

[0092] The connecting bracket 12 and the fan 2 on it can be considered as a vibrating mass. The connection between the connecting bracket 12 and the panel body 11 has a certain degree of flexibility and can be considered as a spring. The panel body 11 itself is a mass. The vibration damping space is a crucial safety distance in this system, ensuring that the connecting bracket 12 and the panel body 11 have sufficient operating space and will not collide due to excessive amplitude. It allows the vibration energy to be further attenuated during the transmission from the connecting bracket 12 to the panel body 11.

[0093] Because the vibration of the connecting bracket 12 is isolated by the vibration damping space and the surrounding flexible connections, the vibration energy transmitted to the panel body 11 becomes very weak. At this time, the relatively large panel body 11 will not shake violently with the vibration of the internal fan 2. A surface with a very small vibration amplitude also has very low efficiency in radiating airborne noise. Therefore, the vibration damping space indirectly reduces the operating noise of the entire fan 2 system and improves the acoustic quality of the product.

[0094] In some embodiments, the connecting bracket 12 may be adopted as follows: Figure 4 and Figure 5 The structure shown is described in the following document. Figure 4 and Figure 5 The connecting bracket 12 includes a first inner extension plate 121, a plurality of first flanges 122, a second inner extension plate 123, and a plurality of second flanges 124. The first inner extension plate 121 is formed on one side edge of the inner side of the panel body 11 and extends along a second direction; the inner end of the first inner extension plate 121 is provided with a plurality of first flanges 122, which are spaced apart along the second direction; the second inner extension plate 123 is parallel to the first inner extension plate 121, formed on the other side edge of the inner side of the panel body 11, and extends along the second direction; the inner end of the second inner extension plate 123 is provided with a plurality of second flanges 124, which are spaced apart along the second direction.

[0095] The surface of the first inner extension plate 121 is perpendicular to the surface of the panel body 11, and the surface of the first flange 122 is parallel to the surface of the panel body 11. Similarly, the surface of the second inner extension plate 123 is perpendicular to the surface of the panel body 11, and the surface of the second flange 124 is parallel to the surface of the panel body 11. The first flange 122 and the second flange 124 are folded towards each other.

[0096] The first inner extension plate 121 and the second inner extension plate 123 serve the same purpose, together forming the main load-bearing structure of the connecting bracket 12. They extend along the second direction, forming two robust longitudinal beams that provide the main bending resistance in the second direction for the entire installation structure, preventing the structure from sagging or twisting under the weight and vibration of the fan 2. Furthermore, the loads from the fan 2 and the circuit board 3 are transferred to the inner extension plates through the flanges, and then diffused from there to the entire side frame of the panel body 11, avoiding stress concentration.

[0097] The first flange 122 and the second flange 124 serve the same purpose: to provide an mounting surface for the vibration damping structure 21 of the fan 2. The multiple first flanges 122 and second flanges 124 are arranged at intervals along the second direction, meaning that the supporting force is distributed across multiple discrete points. This arrangement ensures both uniform support and maximizes structural permeability, further reducing wind resistance.

[0098] In this configuration, for any given fan 2, its two corner points are fixed to the same first flange 122 via vibration damping structures 21, and its other two corner points are fixed to two adjacent second flanges 124 via vibration damping structures 21. That is, multiple first flanges 122 are connected one-to-one with multiple fans 2. The number of second flanges 124 is the number of fans plus one; except for the two second flanges 124 located at the ends, each of the remaining second flanges 124 simultaneously supports two adjacent fans 2.

[0099] Except for the two ends, each of the second flanges 124 in the middle serves as a common mounting point for two adjacent fans 2. This means that two adjacent fans 2 are mechanically fixed to this shared second flange 124. This enables multiple fans 2 to form a mechanical linkage, and the entire array of fans 2 is no longer a row of independent individuals, but is connected into a rigid whole through these shared second flanges 124. This enhances the overall stiffness and stability of the entire array in the second direction, enabling it to work together to resist vibration and avoid the isolated vibration of a single fan 2.

[0100] The shared second flange 124 naturally bears the load from the two fans 2, making the load distribution on the second inner extension plate 123 more continuous and uniform, rather than concentrated on discrete points corresponding to each fan 2. If a layout symmetrical to the first flange 122 is adopted, each flange will only be subjected to the force of one fan 2, and the load distribution will appear discrete. The layout of this embodiment makes the force flow transmission smoother, reduces the peak stress on the connecting bracket 12, especially on the second inner extension plate 123, and improves the structural fatigue life.

[0101] Since one of the second flanges 124 is shared by two wind turbines 2, this effectively adds additional constraints to the support of the wind turbine 2. For the entire wind turbine 2 array, the number of support points is optimized, and in the event of minor deformation or loosening of individual support points, the overall stability can be maintained through redistribution of internal forces, thereby improving fault tolerance and reliability.

[0102] Please see Figure 7 Based on the same inventive concept, this application also provides a power module, including a housing, a radiator 5, and the aforementioned fan mounting structure. The housing has a closed cavity; the radiator 5 is located inside the housing and has a ventilation duct that is not connected to the closed cavity; the fan mounting structure is connected to one end of the radiator 5.

[0103] The fan mounting structure is connected to one end of the radiator 5 and interfaces with the radiator 5's independent ventilation duct, forming a heat dissipation loop physically isolated from the enclosed cavity. Cooling air is forced and exclusively passed through the radiator 5's ventilation duct, resulting in the shortest airflow path and highest efficiency. The enclosed cavity isolates the power devices and precision circuits from dust, moisture, and corrosive gases, providing a superior operating environment and improving the long-term reliability and lifespan of the power module.

[0104] It should be noted that the aforementioned fan installation structure can be assembled and maintained as an independent module; the housing panel 1 can be directly fixed to the housing. If the fan 2 requires maintenance or replacement, there is no need to open the enclosed cavity containing the core circuitry; the entire fan 2 module can be replaced simply by external operation, simplifying the maintenance process and reducing maintenance risks and time costs.

[0105] The power module provided by this invention, by adopting the above-mentioned fan installation structure, can simplify the wiring harness layout of the fan 2, ensure the air intake area, and increase the air intake of the radiator 5; moreover, it can ensure that the connection points of the fan 2 wires are absolutely reliable, thereby improving the stability of the fan 2 installation.

[0106] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fan installation structure, characterized in that, include: The housing panel (1) is provided with an air inlet mesh (111); The inner and outer directions of the housing panel (1) are defined as the first direction; A fan (2) is located inside the housing panel (1) and is directly opposite the air inlet mesh (111) in the first direction; the four corners of the fan (2) are respectively connected to the housing panel (1) through vibration damping structures (21); and The circuit board (3) is located inside the housing panel (1) and outside the fan (2), and avoids the air inlet mesh (111); in the first direction, there is a vibration isolation gap between the circuit board (3) and the housing panel (1); the circuit board (3) has a fixing area (31), a wiring area (32) and an extension area (33); the fixing area (31) is connected to the housing panel (1) by fasteners (4); the wires of the fan (2) are fixed to the inner side of the wiring area (32); The fixed area (31) and the extended area (33) extend in different directions with the wiring area (32) as the reference. The line connecting the center point of the fixed area (31), the center point of the wiring area (32) and the center point of the extended area (33) forms a triangle.

2. The fan installation structure as described in claim 1, characterized in that, The direction perpendicular to the first direction is defined as the second direction. Multiple fans (2) are provided and are distributed at intervals along the second direction. The circuit board (3) has a plurality of wiring areas (32), a plurality of fixing areas (31) and a plurality of extension areas (33); the plurality of wiring areas (32) and the plurality of fixing areas (31) correspond one-to-one, and each pair of adjacent wiring areas (32) are connected by an extension area (33); The wiring area (32) and the corresponding fixing area (31) form a branch, and in the second direction, each fan (2) has at least one branch on one side.

3. The fan installation structure as described in claim 2, characterized in that, The extension area (33) extends along the second direction and corresponds to one side edge of the fan (2) in the first direction; The direction perpendicular to both the first direction and the second direction is defined as the third direction, and the branch extends along the third direction; in the third direction, the height of the extension area (33) is 1 / 5 to 1 / 3 of the height of the branch, and the height of the branch is 1 / 3 to 2 / 3 of the height of the fan (2).

4. The fan installation structure as described in claim 2, characterized in that, The air inlet mesh (111) is distributed at intervals along the second direction, and the multiple air inlet meshes (111) correspond one-to-one with the multiple fans (2) in the first direction; In the second direction, a clearance area (112) is formed on the side of each of the air inlet mesh (111) on the housing panel (1), and the clearance area (112) is connected to the fixing area (31) by the fastener (4).

5. The fan installation structure as described in claim 4, characterized in that, A direction perpendicular to both the first and second directions is defined as a third direction; in the third direction, the height of the air inlet mesh (111) is 2 / 3 to 4 / 5 of the height of the housing panel (1).

6. The fan installation structure as described in claim 2, characterized in that, There is a sheltered space between each pair of adjacent fans (2); the multiple branch sections are multiple first branch sections (34) and a second branch section (35) arranged sequentially along the second direction; in the first direction, the multiple first branch sections (34) correspond one-to-one with the multiple sheltered spaces; One of the fans (2) located at the end is defined as the end fan (2), the second branch (35) is located on the side of the end fan (2), and the wire of the end fan (2) is fixed in the wiring area (32) of the second branch (35); the wires of the other fans (2) are fixed in the wiring areas (32) of the plurality of first branches (34) respectively.

7. The fan installation structure as described in claim 6, characterized in that, The second branch (35) is also provided with a main operation area (351), which is used to connect the main cable.

8. The fan installation structure as described in claim 2, characterized in that, The housing panel (1) includes: The panel body (11) has the aforementioned air inlet mesh (111); and A connecting bracket (12) is connected to the outer periphery of the panel body (11) and extends into the inner side of the panel body (11); the connecting bracket (12) avoids the air inlet mesh (111); the four corners of the fan (2) are respectively fixed to the connecting bracket (12) by the vibration damping structure (21); In the first direction, there is a vibration damping space between the outer end face of the fan (2) and the inner side face of the panel body (11).

9. The fan installation structure as described in claim 8, characterized in that, The connecting bracket (12) includes: The first inner extension plate (121) is formed on one side edge of the inner side of the panel body (11) and extends along the second direction; the inner end of the first inner extension plate (121) is provided with a plurality of first flanges (122), and the plurality of first flanges (122) are arranged at intervals along the second direction. The second inner extension plate (123) is parallel to the first inner extension plate (121), is formed on the other side edge of the inner side of the panel body (11), and extends along the second direction; the inner end of the second inner extension plate (123) is provided with a plurality of second flanges (124), and the plurality of second flanges (124) are spaced apart along the second direction. Among them, for any one of the fans (2), its two corners are respectively fixed to the same first flange (122) by the vibration damping structure (21), and the other two corners are respectively fixed to two adjacent second flanges (124) by the vibration damping structure (21).

10. A power module, characterized in that, include: The casing has a closed inner cavity; A radiator (5) is located inside the housing. The radiator (5) has a ventilation duct that is not connected to the enclosed cavity. as well as The fan mounting structure according to any one of claims 1-9 is connected to one end of the radiator (5).

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