A cooling structure and a power module using it

Abstract

This utility model discloses a cooling structure and a power module using the same. The cooling structure includes a fan, a fan housing, at least one air guide component, and connecting cables. The fan is located inside the fan housing and connected to the connecting cables. The fan includes fan components installed inside the fan housing. The fan housing is provided with an air inlet and at least one air outlet. The air guide component has a first end and a second end, with the first end connected to the air outlet and the second end facing the locally overheated area on the power unit to be cooled. This utility model generates airflow through the fan, guides it through the air inlet and air outlet of the fan housing, and then delivers the airflow to the locally overheated area of ​​the power unit through the air guide component. The airflow directly acts on the parts that traditional liquid cooling cannot effectively cool, enhancing heat exchange in that area. This method overcomes the limitations of simple liquid cooling by using auxiliary air cooling to specifically solve the problem of local overheating, thereby reducing the failure rate and improving the reliability of the power unit.

Description

Technical Field

[0001] This utility model belongs to the field of refrigeration technology, specifically relating to a refrigeration structure and a power module using it. Background Technology

[0002] In the field of power electronic equipment, power units in power equipment cabinets typically employ liquid-cooled backplanes to cool heat-generating components such as IGBTs and capacitors. These heat-generating components are attached to the liquid-cooled backplane, and heat is dissipated by the coolant. This layout works reliably when the coolant inlet temperature is around 40°C and the power unit is operating at its rated capacity. However, with the development of industrial technology, the integration, power rating, and power density of power units are continuously increasing. New application conditions require coolant inlet temperatures to rise to around 50°C, while device power is increased. Under these new conditions, the existing layout can still effectively dissipate heat for flat IGBT components, but for larger capacitors, while the portion attached to the liquid-cooled backplane dissipates heat well, the end furthest from the backplane suffers from insufficient heat exchange, resulting in significantly reduced cooling capacity and localized overheating. Since capacitors are temperature-sensitive, high temperatures will drastically reduce their lifespan, thereby increasing the power unit failure rate and reducing reliability and lifespan. Utility Model Content

[0003] In view of this, the present invention provides a cooling structure and a power module using the same, which solves the technical problem that, under new high-power application conditions, the end of the power unit with large components such as capacitors that are far from the liquid cooling backplate is locally overheated due to insufficient liquid cooling.

[0004] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides a cooling structure comprising a fan, a fan housing, at least one air guide assembly, and a connecting cable. The fan is located within the fan housing and connected to the connecting cable. The fan includes fan components installed inside the fan housing. The fan housing is provided with an air inlet and at least one air outlet. The air guide assembly has opposing first and second ends. The first end is connected to the air outlet, and the second end is configured to face a locally overheated area on a power unit to be cooled, so as to guide airflow from the fan housing to that area.

[0005] In some embodiments, the fan further includes electrical components, which are mounted outside the fan housing and electrically connected to the fan components via the connecting cable.

[0006] In some embodiments, the fan components are centrifugal fans; the electrical components are gold film capacitors and are installed at the front of the fan housing.

[0007] In some embodiments, the fan housing includes a base plate, a top cover, at least one top hanger, at least one front fixing member, and at least one rear push-in limiting member. The base plate is provided with the air inlet, the top cover has downward first bending structures on both sides, the top cover is connected to the base plate to form a cavity, the top cover is provided with the air outlet, the top hanger is connected to the side of the fan housing through the first bending structure, the front fixing member is connected to the front of the top cover, and the rear push-in limiting member is connected to the rear of the top cover.

[0008] In some embodiments, the top hanger has a downwardly bent mounting portion and a guide portion, the mounting portion being used to connect with the fan housing, and the guide portion being used for pushing in for guidance and mounting fixation; wherein, the guide portion is a second bending structure arranged front and rear of the top hanger body.

[0009] In some embodiments, the rear push-in limiting member is a cylindrical conical head used for guiding and limiting the push-in process.

[0010] In some embodiments, the front fixing member has a forward-bent portion, and the bent portion is provided with a mounting hole for connecting and fixing the front of the refrigeration structure.

[0011] In some embodiments, the air guide assembly includes an air guide fixing member and an air guide member. One end of the air guide fixing member is connected to the fan housing, and the other end is configured to be connected to the power unit. The air guide member is connected to the air guide fixing member and forms a channel for guiding airflow.

[0012] In some embodiments, the air outlet is disposed in the front or rear region of the top cover, and the air guide assembly is connected to the front or rear region of the top cover to form different airflow paths.

[0013] According to another aspect of this application, an embodiment of the present invention provides a power module including a power unit and the aforementioned cooling structure, wherein the cooling structure is mounted above the power unit via its fan housing, and the second end of the air guide assembly is aligned with a localized overheated area on the power unit.

[0014] Compared with the prior art, the refrigeration structure of this utility model has at least the following beneficial effects: The refrigeration structure provided by this utility model includes a fan, a fan housing, at least one air guide component, and a connecting cable. The fan is located inside the fan housing and connected to the connecting cable. The fan includes fan components installed inside the fan housing. The fan housing is provided with an air inlet and at least one air outlet. The air guide component has a first end and a second end opposite to each other. The first end is connected to the air outlet, and the second end is configured to face a local overheated area on the power unit to be cooled, so as to guide the airflow from the fan housing to that area.

[0015] The cooling structure of this invention generates airflow through a fan, which is guided through the air inlet and outlet of the fan housing. The airflow is then precisely delivered to the local overheated areas of the power unit by the air guide assembly. More specifically, the airflow directly acts on the parts that traditional liquid cooling cannot effectively cool, enhancing heat exchange in the area and thus reducing the temperature. This method overcomes the limitations of simple liquid cooling by using auxiliary air cooling to specifically solve the problem of local overheating, thereby reducing the failure rate and improving the reliability and service life of the power unit.

[0016] On the other hand, the power module provided by this utility model is designed based on the above-mentioned refrigeration structure, and its beneficial effects are the same as those of the above-mentioned refrigeration structure, which will not be repeated here.

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an exploded view of a refrigeration structure provided in an embodiment of this utility model; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of a refrigeration structure provided in an embodiment of this utility model; Figure 4 This is a schematic diagram of a refrigeration structure from another angle, provided by an embodiment of this utility model; Figure 5This is a schematic diagram of a cooling structure and a power unit in cooperation with an embodiment of the present invention; Figure 6 This is a front view of a refrigeration structure and power unit provided in an embodiment of this utility model; Figure 7 This is another front view of a refrigeration structure and power unit provided in an embodiment of this utility model; Figure 8 This is a schematic diagram of the internal structure of a power unit in a refrigeration structure provided by an embodiment of this utility model; Figure 9 This is a schematic diagram of the power unit in a refrigeration structure provided by an embodiment of the present invention; Figure 10 This is a schematic diagram of the top hanging component in a refrigeration structure provided by an embodiment of this utility model.

[0020] in: 10. Fan; 11. Fan components; 12. Electrical components; 20. Fan housing; 21. Base plate; 22. Top cover; 23. Top bracket; 24. Front fixing component; 25. Rear push-in limit component; 221. First bending structure; 231. Second bending structure; 241. Bending section; 30. Air guide assembly; 31. Air guide fixing component; 32. Air guide component; 40. Connecting cable; 50. Power unit. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0022] In the description of this utility model, it should be clarified that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "back," "left," "right," "up," "down," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Example 1 This embodiment provides a refrigeration structure, such as Figures 1-9 As shown, the cooling structure includes a fan 10, a fan housing 20, at least one air guide assembly 30, and a connecting cable 40. The fan 10 is located inside the fan housing 20 and connected to the connecting cable 40. The fan 10 includes fan components 11 installed inside the fan housing 20. The fan housing 20 is provided with an air inlet and at least one air outlet. The air guide assembly 30 has a first end and a second end opposite to each other. The first end is connected to the air outlet, and the second end is configured to face a local overheated area on the power unit 50 to be cooled, so as to guide the airflow from the fan housing 20 to that area.

[0025] The fan 10 is installed inside the fan housing 20 and is connected to an external power source via a connecting cable 40 to obtain power. The fan housing 20 is provided with an air inlet and at least one air outlet. The first end of the air guide assembly 30 is directly connected to the air outlet of the fan housing 20, and the second end is aligned with and directed towards the local overheated area on the power unit 50. More specifically, in the overall layout, the fan housing 20 is usually located above the power unit 50. The air guide assembly 30 extends between the fan housing 20 and the power unit 50 as an airflow channel, ensuring that the airflow can flow precisely from the air outlet to the specific heat-generating part of the power unit 50. The power unit 50 is located below as a cooling target, and its local overheated area is directly opposite the second end of the air guide assembly 30, thus forming a top-down cooling path. The entire structure is stably fixed through a simple mechanical connection.

[0026] The fan 10 is mainly responsible for generating forced airflow, driving airflow through its operation, and providing a basic power source for heat dissipation. The fan housing 20 serves to house the fan 10 and guide the airflow. It draws in ambient air through the air inlet and outputs the airflow in a concentrated manner through the air outlet. More specifically, it acts as an intermediate shell to ensure orderly airflow without leakage. The air guide assembly 30 is responsible for accurately transmitting and guiding the airflow from the fan housing 20 to the local overheated areas of the power unit 50. Its channel shape ensures that the airflow is concentrated and acts efficiently on the target point. The connecting cable 40 is responsible for power supply, transmitting external power to the fan 10 so that it can operate continuously, thereby supporting the normal operation of the entire refrigeration structure.

[0027] When the fan 10 is powered on via the connecting cable 40, it begins to draw in air from the air inlet of the fan housing 20. The airflow is accelerated and concentrated inside the fan housing 20 and then discharged from the air outlet. More specifically, the airflow then enters the first end of the air guide assembly 30 and flows along its channel to the second end, eventually blowing directly onto the local overheated areas of the power unit 50, such as the upper part of the capacitor components. As the airflow passes over these heat-generating surfaces, it carries away the accumulated heat, achieving a cooling effect, and then is discharged from around the power unit 50. The entire process is carried out continuously through forced convection, ensuring that the local overheated areas are effectively cooled.

[0028] Background technology indicates that under new application conditions, such as when the coolant temperature rises, the taller components in the power unit 50, such as capacitors, may experience localized overheating due to insufficient heat dissipation at the end furthest from the liquid-cooled backplate, leading to a shortened lifespan and reduced reliability. To address this technical problem, the cooling structure of this embodiment generates airflow through the fan 10, which is guided through the air inlet and outlet of the fan housing 20, and then precisely delivered to the localized overheated areas of the power unit 50 by the air guide assembly 30. More specifically, the airflow directly acts on parts that cannot be effectively cooled by traditional liquid cooling, enhancing heat exchange in these areas and thus reducing the temperature. This method overcomes the limitations of simple liquid cooling by using auxiliary air cooling to specifically address localized overheating problems, thereby reducing the failure rate and improving the reliability and lifespan of the power unit 50.

[0029] In a specific embodiment, such as Figure 2 As shown, the fan 10 also includes an electrical component 12, which is installed outside the fan housing 20 and electrically connected to the fan components 11 via the connecting cable 40.

[0030] The fan components 11 are installed inside the fan housing 20 and fixed to the base plate 21, while the electrical components 12 are installed at the front of the fan housing 20. The electrical components 12 are connected to the fan housing 20 through the front fixing part 24. The two are electrically connected through the connecting cable 40. The connecting cable 40 not only connects the fan components 11 and the electrical components 12, but also extends to the external power supply and grounding point, thereby forming a complete circuit path to ensure stable power transmission.

[0031] The fan component 11, as the core part of the fan, is responsible for generating forced airflow and driving airflow through its operation to provide cooling power. The electrical component 12, as a component that supports power distribution, is used to stabilize and optimize the power supply. The electrical component 12, such as the gold film capacitor, can help smooth current fluctuations and ensure that the fan component 11 receives continuous and reliable power, thereby ensuring the normal operation of the entire fan.

[0032] When the connecting cable 40 is connected to the external power supply, the electrical component 12 first adjusts and stabilizes the input current, and then transmits the electrical energy to the fan component 11 through the connecting cable 40, driving it to start running and generate airflow. More specifically, this cooperation ensures that the fan component 11 can work in an efficient and stable manner, thereby generating a continuous and strong airflow effect for the subsequent cooling process, ultimately helping to reduce the temperature of the local overheated area of ​​the power unit 50 and improve the overall heat dissipation efficiency.

[0033] In a specific embodiment, the fan component 11 is a centrifugal fan; the electrical component 12 is a gold film capacitor and is installed at the front of the fan housing 20.

[0034] As the core component of the fan, the fan component 11 adopts a centrifugal fan design. It is installed inside the fan housing 20 and fixed on the base plate 21. It is connected to the electrical component 12 and the external power supply through the connecting cable 40. More specifically, the centrifugal fan draws in air from the air inlet during operation through its unique impeller structure and discharges the airflow from the air outlet at a high pressure and flow rate. This design allows the airflow to be concentrated and efficiently transported, thereby generating a strong and stable cooling airflow effect. This airflow is used to guide the airflow through the air guide assembly 30 to the local overheated area of ​​the power unit 50, effectively enhancing the heat dissipation capacity, compensating for the shortcomings of the liquid cooling backplate in local areas, and improving the overall cooling efficiency.

[0035] Specifically, the electrical component 12 uses a gold film capacitor as the power distribution support component. It is installed at the front of the fan housing 20 and connected to the fan housing 20 through the front fixing part 24. It is also electrically connected to the fan component 11 through the connecting cable 40. The gold film capacitor can smooth current fluctuations and provide a stable power supply, ensuring that the fan component 11 receives continuous and reliable power, thereby ensuring the smooth operation of the fan. Installing it at the front facilitates maintenance and wiring, and also helps to optimize the overall layout, making the structure more compact, reducing the internal space occupation, and ultimately improving the reliability and service life of the fan, supporting the stable operation of the entire refrigeration structure.

[0036] In a specific embodiment, such as Figure 2 As shown, the fan housing 20 includes a base plate 21, a top cover 22, at least one top hanger 23, at least one front fixing member 24, and at least one rear push-in limiting member 25. The base plate 21 is provided with the air inlet. The top cover 22 has downward first bending structures 221 on both sides. The top cover 22 is connected to the base plate 21 to form a cavity. The top cover 22 is provided with the air outlet. The top hanger 23 is connected to the side of the fan housing 20 through the first bending structures 221. The front fixing member 24 is connected to the front of the top cover 22. The rear push-in limiting member 25 is connected to the rear of the top cover 22.

[0037] The base plate 21 serves as the basic component of the entire fan housing 20. It has an air inlet at its bottom and extends upward through a bending structure. It is connected and fixed to the top cover 22 through the installation features of the bending part, thereby forming a closed cavity to accommodate the fan 10. The top cover 22 has an air outlet and a top hanger 23 is installed on its side. A front fixing part 24 is installed at the front and a rear push-in limiting part 25 is installed at the rear. The top hanger 23 is connected to the side of the fan housing 20 through its downward bending installation part, that is, through the first bending structure 221. The front fixing part 24 is connected to the front of the top cover 22 through its forward bending part. The rear push-in limiting part 25 is directly fixed to the rear of the top cover 22. These components together constitute the complete frame of the fan housing 20, ensuring that each part fits tightly and is in a stable position, which facilitates overall installation and airflow guidance.

[0038] The base plate 21 mainly provides the structural foundation and air intake function, allowing external air to enter through its large bottom hole and supporting the internal fan 10; the top cover 22 forms the top of the cavity and is provided with an air outlet for concentrating and discharging airflow, and each side is provided with two first bending structures 221 for connecting the top hanger 23 to the fan housing 20; the top hanger 23 is used to achieve hanging fixation and push-in guidance, and its bending feature makes the installation process more labor-saving and precise; the front fixing member 24 is responsible for providing a connection point at the front of the housing to ensure that the fan housing 20 is fixed to the front end of the external structure; the rear push-in limiting member 25 is used for precise guidance and vertical and horizontal limitation during the push-in process to prevent deviation during installation.

[0039] During installation, the fan housing 20 is pushed into the predetermined position by the mounting feature of the top bracket 23. The rear push-in limiting member 25 provides guidance and limiting during this process to ensure that the housing is accurately positioned. Then, the front fixing member 24 is used for final connection and fixation. More specifically, this cooperation makes the installation operation labor-saving and precise, which can be completed simply by pushing in and fixing. In the working state, the airflow enters the cavity from the air inlet of the bottom plate 21, is discharged through the air outlet of the top cover 22, and is guided by the air guide assembly 30 to the local overheated area of ​​the power unit 50, thereby achieving efficient heat dissipation.

[0040] In a specific embodiment, such as Figure 2 As shown, the top hanger 23 has a downwardly bent mounting part and a guide part. The mounting part is used to connect with the fan housing 20, and the guide part is used for pushing in for guidance and hanging and fixing. The guide part is a second bending structure 231 arranged at the front and rear of the top hanger 23 body.

[0041] The mounting section is the downward-bent part of the top hanger 23, which has mounting features for direct connection and fixation to the side of the top cover 22 of the fan housing 20, ensuring that the top hanger 23 is firmly attached to the housing structure; the guide section is the partial bending features set at the front and rear of the top hanger 23 body, namely the second bending structure 231, which interacts with the external mounting track or support structure during the installation process and plays a guiding role.

[0042] The installation section is primarily responsible for providing mechanical fixing functions. Through its downward bending installation feature, it tightly connects the top bracket 23 to the top cover 22 of the fan housing 20, thereby transferring the load and enhancing the stability of the overall structure. The guide section focuses on guiding and assisting in the installation process. Through its partial bending feature, it reduces friction and resistance in the early stages of installation, guides the fan housing 20 to move along a predetermined path, and helps to counteract the effects of gravity, making the installation operation smoother and more precise, ensuring that the housing can be installed quickly and accurately in the target position.

[0043] When installing the fan housing 20, the guide part first contacts the external rail or mounting surface, and provides initial guidance through its bending design, making the pushing action easy and accurate in direction, reducing the need for manual adjustment; then, after the housing is in place, the mounting part achieves final locking through a fixed connection, ensuring that the fan housing 20 fits tightly with the power unit 50 or other structures.

[0044] In a specific embodiment, such as Figure 2 As shown, the rear push-in limiting member 25 is a cylindrical conical head, used for guiding and limiting the push-in process.

[0045] The rear push-in limiting member 25 has a unique cylindrical conical head shape. It is directly installed on the rear of the top cover 22 of the fan housing 20. During installation, its conical head contacts the external mounting rail or interface. More specifically, this design allows the conical head to guide the movement of the fan housing 20 during the push-in process, smoothly sliding into the predetermined position. At the same time, its cylindrical structure provides stable support, achieving precise guidance in the push-in direction and limiting control in the up, down, left, and right directions. This simplifies the installation process, makes operation less strenuous and eliminates the need for complex adjustments, avoids offset or jamming problems during push-in, and ensures that the fan housing 20 can be quickly and accurately fixed in place, thereby improving the installation reliability and operational stability of the overall structure.

[0046] In a specific embodiment, such as Figure 2 As shown, the front fixing member 24 has a forward-bent portion 241, and the bent portion 241 is provided with a mounting hole for connecting and fixing the front part of the refrigeration structure.

[0047] The front fixing member 24 is connected to the front of the top cover 22 of the fan housing 20 through its forward bend 241. The mounting holes provided on the bend 241 are used to fix it to the front of the external structure or power unit 50 with bolts or similar fasteners. More specifically, this design allows the front fixing member 24 to quickly achieve a firm connection at the front through the mounting holes of the bend 241 after the fan housing 20 is pushed into place, ensuring that the entire refrigeration structure will not be displaced due to vibration or external force during operation. This improves the convenience and reliability of installation, allowing operators to complete the assembly with only simple fixing at the front, reducing installation time and complexity, while enhancing the stability of the overall structure and preventing airflow leakage or component loosening.

[0048] In a specific embodiment, such as Figure 2 As shown, the air guide assembly 30 includes an air guide fixing member 31 and an air guide member 32. One end of the air guide fixing member 31 is connected to the fan housing 20, and the other end is configured to be connected to the power unit 50. The air guide member 32 is connected to the air guide fixing member 31 and forms a channel for guiding airflow.

[0049] One end of the air guide fixing component 31 is connected and fixed to the front of the top cover 22 of the fan housing 20 via its upper mounting feature, while the other end is configured to connect to the existing mounting structure on the power unit 50 via its lower mounting feature. The air guide component 32 is a box with a rear opening, and its front surface is firmly connected to the front bending feature of the air guide fixing component 31 via several mounting features, thereby forming a complete air supply channel. More specifically, the air guide fixing component 31 serves as an intermediate support to support the air guide component 32 and stably bridges the entire air guide assembly 30 between the fan housing 20 and the power unit 50, ensuring the airtightness and structural rigidity of the airflow channel and preventing loosening or air leakage during operation. The air guide fixture 31 mainly serves the functions of mechanical connection and support. It transfers the structural load from the fan housing 20 to the power unit 50 and ensures that the overall position of the air guide assembly 30 is accurately aligned with the local overheated area. The air guide 32 focuses on airflow guidance. Its unique box structure and rear opening design can effectively receive the airflow from the air outlet of the fan housing 20 and deliver the airflow to the target cooling point in a concentrated and lossless manner through its internal channels, avoiding airflow diffusion or energy loss during the delivery process.

[0050] After the airflow is discharged from the air outlet of the fan housing 20, it first enters the channel inlet formed by the rear opening of the air guide 32. Then the airflow is confined inside the housing of the air guide 32 and transported forward. Finally, it is precisely blown from the second end of the air guide 32 onto the surface of the locally overheated components of the power unit 50. More specifically, the firm fixation of the air guide fixing part 31 ensures that the entire airflow path will not deviate during operation, thereby ensuring the continuity and stability of cooling.

[0051] In a specific embodiment, such as Figure 6 and Figure 7 As shown, the air outlet is located in the front or rear area of ​​the top cover 22, and the air guide assembly 30 is connected to the front or rear area of ​​the top cover 22 to form different airflow paths.

[0052] The air outlet can be flexibly set in the front or rear area of ​​the top cover 22, and the air guide assembly 30 is correspondingly connected to the same front or rear area of ​​the top cover 22, thereby forming two different airflow paths.

[0053] More specifically, when the air outlet is located at the front of the top cover 22, the air guide assembly 30 is connected there. The airflow enters from the bottom of the fan housing 20 and is guided through the front air outlet and the air guide assembly 30 to the local overheated area of ​​the power unit 50, and then discharged from the rear of the power unit 50. Conversely, when the air outlet is located at the rear of the top cover 22, the air guide assembly 30 is connected to the rear. The airflow is guided through the rear air outlet and the air guide assembly 30 to the local overheated area and discharged from the front of the power unit 50. The effect of this design is to provide flexibility to adapt to different power unit 50 layouts, ensuring that the airflow can accurately cool the locally overheated components in various installation environments. Furthermore, it enhances heat dissipation efficiency by optimizing the airflow direction to reduce heat accumulation, thereby effectively reducing local temperature, improving the operational reliability and service life of the power unit 50, and simplifying the installation process, making the overall structure easier to expand and apply.

[0054] The working process of the refrigeration structure provided in Example 1 is as follows: First, the fan housing 20 is mounted and pushed into the predetermined position above the power unit 50 via the guide part of the top hanger 23. The rear push-in limiter 25, as a cylindrical conical head, provides precise guidance and limit during push-in to prevent deviation. Then, the front fixing part 24 is fixed at the front through the mounting hole on its bent part 241. After installation, the connecting cable 40 is connected to the external power supply to power the fan 10. More specifically, the fan component 11 starts and operates as a centrifugal fan, and the electrical component 12 acts as a gold film capacitor to stabilize the current and ensure the fan 10 operates smoothly. Airflow is drawn in from the air inlet of the bottom plate 21 of the fan housing 20, concentrated in the cavity, and discharged from the air outlet of the top cover 22. It can be set in the front or rear area, and the air guide assembly 30 is connected to the same area accordingly. The air guide fixing part 31 firmly connects the air guide assembly 30 between the fan housing 20 and the power unit 50, and the air guide part 32 forms a sealed channel to guide the airflow. When the air outlet is in the front, the airflow is guided by the air guide assembly 30 to the local overheated area of ​​the power unit 50 and then discharged from the rear. Conversely, it is discharged from the front, thereby achieving targeted forced convection cooling. Furthermore, this synergistic work ensures that the airflow efficiently removes the heat from the part of the heat-generating components such as capacitors away from the liquid cooling backplate, effectively reducing the local temperature, improving the heat dissipation efficiency and the reliability of the power unit 50, while the overall structure is compact and easy to install.

[0055] Example 2 This embodiment provides a power module, such as Figures 5-7 As shown, it includes a power unit 50 and a refrigeration structure as described in Embodiment 1. The refrigeration structure is mounted above the power unit 50 via its fan housing 20, and the second end of the air guide assembly 30 is aligned with a local overheated area on the power unit 50.

[0056] The power module includes a power unit 50 and a cooling structure as described in Embodiment 1. The cooling structure is securely mounted above the power unit 50 via its fan housing 20. The second end of the air guide assembly 30 is precisely aligned with a localized overheated area on the power unit 50, such as the upper part of a capacitor component. This layout ensures that after airflow is drawn in from the air inlet of the fan housing 20, it is guided by the air guide assembly 30 and blown directly to the parts of the power unit 50 that cannot be effectively cooled by traditional liquid cooling, achieving targeted forced convection cooling. This significantly reduces the temperature of the localized overheated area, effectively preventing performance degradation or damage to components due to high temperatures, thereby improving the overall reliability and service life of the power unit 50. At the same time, this design is compatible with existing power unit layouts, is easy to install, and has a compact structure, allowing it to adapt to the heat dissipation requirements of new application conditions without significant modifications.

[0057] In summary, it is readily understood by those skilled in the art that, without conflict, the aforementioned advantageous technical features can be freely combined and superimposed.

[0058] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A cooling structure, characterized in that, The cooling structure includes a fan, a fan housing, at least one air guide assembly, and a connecting cable. The fan is connected to the connecting cable. The fan includes fan components installed inside the fan housing. The fan housing is provided with an air inlet and at least one air outlet. The air guide assembly has a first end and a second end opposite to each other. The first end is connected to the air outlet, and the second end is configured to face a local overheated area on the power unit to be cooled, so as to guide the airflow from the fan housing to that area.

2. The refrigeration structure according to claim 1, characterized in that, The fan also includes electrical components, which are installed outside the fan housing and electrically connected to the fan components via the connecting cable.

3. The refrigeration structure according to claim 2, characterized in that, The fan components are centrifugal fans; the electrical components are gold film capacitors, which are installed at the front of the fan housing.

4. The refrigeration structure according to claim 1, characterized in that, The fan housing includes a base plate, a top cover, at least one top hanger, at least one front fixing member, and at least one rear push-in limiting member. The base plate is provided with the air inlet, and the top cover has downward first bending structures on both sides. The top cover is connected to the base plate to form a cavity. The top cover is provided with the air outlet. The top hanger is connected to the side of the fan housing through the first bending structure. The front fixing member is connected to the front of the top cover, and the rear push-in limiting member is connected to the rear of the top cover.

5. The refrigeration structure according to claim 4, characterized in that, The top hanger has a downwardly bent mounting part and a guide part. The mounting part is used to connect with the fan housing, and the guide part is used for pushing in, guiding, and fixing. The guide part is a second bent structure set at the front and rear of the top hanger body.

6. The refrigeration structure according to claim 4, characterized in that, The rear push-in limiting component is a cylindrical conical head, used for guiding and limiting the push-in process.

7. The refrigeration structure according to claim 4, characterized in that, The front fixing member has a forward-bent portion, and the bent portion is provided with a mounting hole for connecting and fixing the front part of the refrigeration structure.

8. The refrigeration structure according to claim 1, characterized in that, The air guide assembly includes an air guide fixing component and an air guide component. One end of the air guide fixing component is connected to the fan housing, and the other end is configured to be connected to the power unit. The air guide component is connected to the air guide fixing component and forms a channel for guiding airflow.

9. The refrigeration structure according to claim 4, characterized in that, The air outlet is located in the front or rear area of ​​the top cover, and the air guide assembly is connected to the front or rear area of ​​the top cover to form different airflow paths.

10. A power module, comprising a power unit, characterized in that, It also includes a refrigeration structure as described in any one of claims 1 to 9, wherein the refrigeration structure is mounted above the power unit via its fan housing, and the second end of the air guide assembly is aligned with a localized overheated area on the power unit.

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