Heat dissipation module of sliding type quick-release fan

Abstract

The utility model relates to a radiating module of a sliding type quick-release fan. The radiating module comprises a radiator, a positioning frame, a bottom plate, a PCB (Printed Circuit Board) and a radiating fan, the radiator comprises a base, a heat conduction pipe and a radiating fin group. The positioning frame is arranged on the peripheral side of the heat dissipation fin set in a surrounding mode. The positioning frame is provided with a fan sliding groove, a first air opening, a second air opening and a containing groove. The bottom plate is of a U-shaped plate-shaped structure and is located at the bottom of the heat dissipation fin set. The PCB is provided with a first electric contact and a wire harness. The cooling fan is inserted into the fan sliding groove and abuts against the bottom plate. The cooling fan is provided with a second electric contact piece electrically connected with the first electric contact piece. The cooling fan is detachably connected with at least one of the positioning frame and the bottom plate in a magnetic attraction mode. Sliding and magnetic attraction installation of the cooling fan are achieved through the positioning frame and the bottom plate, wire harnesses are transferred to the PCB on the bottom plate, electric contact pieces are adopted for connection, the difficulty of disassembling and assembling the fan is reduced, and the risk of damage or poor contact between the fan and a fan interface in the disassembling and assembling process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation device technology, and in particular to a heat dissipation module for a sliding quick-release fan. Background Technology

[0002] For some high-power electronic devices, a heat dissipation module consisting of a heat sink and a fan is an essential structure, such as the heat dissipation module of a CPU and the heat dissipation module of a graphics card.

[0003] In traditional designs, fans are secured to the heatsink using snap-fit ​​clips or screws, and the fan requires an external wiring harness to connect to the fan interface on the electronic device for power and control signals. The drawbacks of this traditional design are that when users need to install or remove the fan, the confined and dimly lit space inside the electronic device makes maneuvering the snap-fit ​​clips or screws very difficult. Furthermore, repeatedly plugging and unplugging the fan interface during installation and removal can easily damage the interface or result in inaccurate connections and poor contact.

[0004] Therefore, it is necessary to develop a new type of heat dissipation module, which aims to reduce the difficulty of disassembling and assembling the fan, and reduce the risk of damage or poor contact between the fan and the fan interface during disassembly and assembly. Utility Model Content

[0005] Based on this, the present invention provides a heat dissipation module for a sliding quick-release fan. The positioning frame and the base plate are used to realize the sliding and magnetic installation of the heat dissipation fan, and the wiring harness is transferred from the heat dissipation fan to the PCB board on the base plate. The heat dissipation fan and the PCB board are connected by electrical contacts, which not only reduces the difficulty of disassembling and assembling the fan, but also reduces the risk of damage or poor contact between the fan and the fan interface during disassembly and assembly.

[0006] A heat dissipation module for a sliding quick-release fan includes:

[0007] Heat sink; The heat sink includes: a base, heat pipes connecting the base, and heat dissipation fins mounted on the heat pipes;

[0008] A positioning frame for attaching the heat sink; the positioning frame surrounds the outer periphery of the heat sink fin assembly; the top of the positioning frame has a fan slide groove arranged from top to bottom; the front of the positioning frame has a first air vent; the back of the positioning frame has a second air vent; the line connecting the first air vent and the second air vent is aligned with the airflow direction of the heat sink fin assembly; the bottom of the positioning frame has a storage slot for storing the heat sink fin assembly, and the storage slot is connected to the fan slide groove along the airflow direction of the heat sink fin assembly.

[0009] The base plate is connected to the bottom of the positioning frame; the base plate has a U-shaped plate structure and is located at the bottom of the heat dissipation fin assembly;

[0010] A PCB board mounted on a base plate; the PCB board has a first electrical contact and a wiring harness extending beyond the positioning frame; and

[0011] A cooling fan is slidably connected to a positioning frame; the cooling fan is inserted into a fan slot from top to bottom and abuts against a base plate; the bottom of the cooling fan is provided with a second electrical contact that is electrically connected to the first electrical contact; the cooling fan is detachably connected to at least one of the positioning frame and the base plate by magnetic attraction.

[0012] The aforementioned sliding quick-release fan heat dissipation module is assembled by first mounting the PCB board onto the base plate, then installing the positioning frame and base plate onto the outer periphery of the heatsink fin assembly, forming a sliding rail structure for the sliding connection of the cooling fan. Next, the cooling fan is slid down into the fan slot until its bottom contacts the base plate, at which point it is magnetically secured. The second electrical contact at the bottom of the cooling fan establishes an electrical connection with the first electrical contact on the PCB board, and the PCB board is then connected to the fan interface of the electronic device via a wiring harness. This sliding installation and magnetic fixation method enables the detachable installation of the cooling fan; users can easily install or remove it by simply pulling the fan up or down. Furthermore, because the cooling fan and PCB board are detachably connected via electrical contacts, and the wiring harness is transferred to the PCB board, no manipulation of the wiring harness is required when installing or removing the cooling fan. The above design utilizes a positioning frame and a base plate to achieve sliding and magnetic installation of the cooling fan, and transfers the wiring harness from the cooling fan to the PCB board on the base plate. The cooling fan and the PCB board are connected by electrical contacts, which not only reduces the difficulty of disassembling and assembling the fan, but also reduces the risk of damage or poor contact between the fan and the fan interface during disassembly and assembly.

[0013] In one embodiment, a first magnetic clasp is provided on the back or sides of the top of the cooling fan, and a second magnetic clasp is provided on the bottom of the cooling fan; a third magnetic clasp is provided on the positioning frame to attract the first magnetic clasp, and a fourth magnetic clasp is provided on the base plate to attract the second magnetic clasp. The top of the cooling fan is magnetically secured using the first and third magnetic clasps, and the bottom of the cooling fan is magnetically secured using the second and fourth magnetic clasps, thereby improving the stability of the cooling fan installation.

[0014] In one embodiment, the first electrical contact is a conductive spring, and the second electrical contact is a metal pin. When the cooling fan comes into contact with the base plate, the conductive spring is compressed and makes contact with the metal pin to achieve electrical connection. The structure is simple and efficient.

[0015] In one embodiment, the first electrical contact is a pin header and the second electrical contact is a female header. When the cooling fan comes into contact with the base plate, the pin header and the female header connect to achieve electrical connection, resulting in a simple and efficient structure.

[0016] In one embodiment, the positioning frame is connected to the top of the heat sink fin assembly by a first screw, and the base plate is connected to the bottom of the heat sink fin assembly by a second screw. The positioning frame and base plate are respectively connected to the heat sink fin assembly by screws, resulting in a strong connection and high controllability of installation precision.

[0017] In one embodiment, the positioning frame is connected to the base plate by a third screw, and the heat dissipation fin assembly is snapped between the positioning frame and the base plate. After the positioning frame and the base plate are fixedly connected by screws, the heat dissipation fin assembly is snapped between the two, which is simple to install and has a simple structure.

[0018] In one embodiment, the bottom of the positioning frame is provided with a limiting groove along the airflow direction of the heat dissipation fin assembly; both sides of the base plate are inserted into the bottom of the positioning frame along the limiting groove. The connection between the positioning frame and the base plate is achieved through a sliding connection, resulting in a simple structure and good stability.

[0019] In one embodiment, the PCB board is snapped onto the base plate. This snap-fit ​​method simplifies assembly and disassembly of the PCB board.

[0020] In one embodiment, both sides of the positioning frame are closed structures, thereby forcing the airflow to flow only between the first air inlet and the second air inlet, which has a rectifying effect on the airflow. Attached Figure Description

[0021] Figure 1 This is a perspective view of the heat dissipation module of a sliding quick-release fan according to an embodiment of the present invention.

[0022] Figure 2 for Figure 1 A three-dimensional view of the heat dissipation module of the sliding quick-release fan shown from another perspective;

[0023] Figure 3 for Figure 1 A half-sectional view of the heat dissipation module of the sliding quick-release fan shown;

[0024] Figure 4 for Figure 3 An exploded view of the heat dissipation module for the sliding quick-release fan shown.

[0025] Figure 5 for Figure 4 A perspective view of the positioning frame in the heat dissipation module of the sliding quick-release fan shown.

[0026] Figure 6 for Figure 5 A three-dimensional view of the positioning frame shown from another perspective;

[0027] Figure 7 for Figure 5 The exploded view of the positioning frame shown;

[0028] Figure 8 for Figure 4 A perspective view of the base plate in the heat dissipation module of the sliding quick-release fan shown.

[0029] Figure 9 for Figure 8 A three-dimensional view of the base plate from another perspective;

[0030] Figure 10 for Figure 4 A perspective view of the PCB board in the heat dissipation module of the sliding quick-release fan shown.

[0031] Figure 11 for Figure 10 The diagram shows a combined view of the PCB board and the base plate.

[0032] Figure 12 for Figure 11 The image shows a combined view of the PCB board and the base plate from another perspective.

[0033] Figure 13 for Figure 4 A perspective view of the cooling fan in the heat dissipation module of the sliding quick-release fan shown.

[0034] Figure 14 for Figure 13 A three-dimensional view of the cooling fan from another perspective;

[0035] Figure 15 for Figure 1 Assembly steps of the sliding quick-release fan heatsink module shown. Figure 1 ;

[0036] Figure 16 for Figure 15 Assembly steps of the sliding quick-release fan heatsink module shown. Figure 2 ;

[0037] Figure 17 for Figure 16 Assembly steps of the sliding quick-release fan heatsink module shown. Figure 3 ;

[0038] Figure 18 for Figure 17 Assembly steps of the sliding quick-release fan heatsink module shown. Figure 4 .

[0039] The meanings of the labels in the attached diagram are as follows:

[0040] 100-Sliding quick-release fan cooling module;

[0041] 10-Heat sink, 11-Base, 12-Heat pipe, 13-Heat fin assembly;

[0042] 20-Positioning frame, 21-Fan slide rail, 22-First air vent, 23-Second air vent, 24-Storage slot, 25-First screw, 26-Limit slide rail, 27-Third magnetic component, 28-Acrylic lens;

[0043] 30 - Base plate, 31 - Second screw, 32 - Fourth magnetic component;

[0044] 40-PCB board, 41-First electrical contact, 42-Wire harness;

[0045] 50 - Cooling fan, 51 - Second electrical contact, 52 - First magnetic component. Detailed Implementation

[0046] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0047] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0052] like Figures 1 to 18 As shown, it is a heat dissipation module 100 of a sliding quick-release fan according to an embodiment of the present invention.

[0053] like Figures 1 to 4 As shown, the heat dissipation module 100 of the sliding quick-release fan includes: a heat sink 10, a positioning frame 20 that fits onto the heat sink 10, a base plate 30 connected to the bottom of the positioning frame 20, a PCB board 40 mounted on the base plate 30, and a heat dissipation fan 50 that slides on the positioning frame 20. The heat sink 10 is used to connect electronic devices to conduct heat and improve the heat dissipation efficiency of the electronic devices. The heat dissipation fan 50 is used to generate airflow to improve the heat dissipation efficiency of the heat sink 10. The positioning frame 20 and the base plate 30 form a sliding rail structure for the heat dissipation fan 50 and also limit the airflow passing through the heat sink 10.

[0054] The following text, combined with Figures 1 to 18As shown, the heat dissipation module 100 of the sliding quick-release fan described above will be further explained.

[0055] like Figure 4 As shown, the heat sink 10 includes: a base 11, a heat pipe 12 connected to the base 11, and a heat dissipation fin assembly 13 sleeved on the heat pipe 12. During operation, the base 11 is used to attach to a target on the electronic device that needs heat dissipation (such as the CPU), and then the heat is transferred to the heat dissipation fin assembly 13 via the heat pipe 12 for heat dissipation.

[0056] like Figures 1 to 3 As shown, the positioning frame 20 surrounds the outer periphery of the heat dissipation fin assembly 13. The top of the positioning frame 20 has a fan slide groove 21 arranged from top to bottom. The front of the positioning frame 20 has a first air vent 22. The back of the positioning frame 20 has a second air vent 23. The line connecting the first air vent 22 and the second air vent 23 is aligned with the airflow direction of the heat dissipation fin assembly 13. The bottom of the positioning frame 20 has a storage groove 24 for receiving the heat dissipation fin assembly 13, and the storage groove 24 and the fan slide groove 21 are connected along the airflow direction of the heat dissipation fin assembly 13.

[0057] by Figure 1 Taking the posture shown in the figure as an example, in this embodiment, the first air vent 22 is the air inlet and the second air vent 23 is the air outlet. The air inlet and outlet directions are related to the installation orientation of the cooling fan 50, therefore, no restrictions are imposed here.

[0058] like Figure 1 and Figure 4 As shown, the base plate 30 has a U-shaped plate structure and is located at the bottom of the heat dissipation fin assembly 13. Here, there are multiple possible installation methods for the base plate 30 and the positioning frame 20.

[0059] For example, such as Figure 4 As shown, in this embodiment, the positioning frame 20 is connected to the top of the heat dissipation fin assembly 13 by a first screw 25, and the base plate 30 is connected to the bottom of the heat dissipation fin assembly 13 by a second screw 31. The positioning frame 20 and the base plate 30 are respectively connected to the heat dissipation fin assembly 13 by screws, which provides strong connection stability and high controllability of installation accuracy (the distance between the top of the heat dissipation fin assembly 13 and the top of the positioning frame 20 can be adjusted by adjusting the feed depth of the first screw 25, and the distance between the bottom of the heat dissipation fin assembly 13 and the base plate 30 can be adjusted by adjusting the feed depth of the second screw 31).

[0060] In addition, such as Figure 4 As shown, in this embodiment, an acrylic lens 28 can also be attached to the top of the positioning frame 20, which can be used to hide the first screw 25 and also serve a decorative purpose.

[0061] In other embodiments, at the expense of installation accuracy and stability, the heat dissipation fin assembly 13 can be confined between the positioning frame 20 and the base plate 30 to achieve the installation purpose. For example, the positioning frame 20 is connected to the base plate 30 by a third screw, and the heat dissipation fin assembly 13 is snapped between the positioning frame 20 and the base plate 30. After the positioning frame 20 and the base plate 30 are fixedly connected by screws, the heat dissipation fin assembly 13 is snapped between them, which is simple to install and has a simple structure.

[0062] In addition, such as Figure 5 As shown, in this embodiment, the bottom of the positioning frame 20 is provided with a limiting groove 26 along the airflow direction of the heat dissipation fin assembly 13. The two sides of the base plate 30 are inserted into the bottom of the positioning frame 20 along the limiting groove 26. The connection between the positioning frame 20 and the base plate 30 is achieved through a sliding connection, which has a simple structure, good stability, and is conducive to improving installation accuracy.

[0063] like Figure 11 As shown, in this embodiment, for ease of assembly and disassembly, the PCB board 40 is snap-fitted onto the base plate 30. The snap-fit ​​method simplifies the assembly and disassembly of the PCB board 40. Combined with… Figure 1 and Figure 10 As shown, the PCB board 40 is provided with a first electrical contact 41 and a wire harness 42 extending out of the positioning frame 20.

[0064] like Figure 3 As shown, the cooling fan 50 is inserted into the fan slot 21 from top to bottom and abuts against the base plate 30. The bottom of the cooling fan 50 is provided with a second electrical contact 51 that is electrically connected to the first electrical contact 41. In this embodiment, as... Figure 13 As shown, the first electrical contact 41 is a conductive spring, and correspondingly, as... Figure 10 As shown, the second electrical contact 51 is a metal pin. When the cooling fan 50 abuts against the base plate 30, the conductive spring is compressed and contacts the metal pin to achieve electrical connection. The structure is simple and efficient.

[0065] In other embodiments, the first electrical contact 41 and the second electrical contact 51 may also have other structural forms. For example, the first electrical contact 41 may be a pin header, and correspondingly, the second electrical contact 51 may be a female header. When the cooling fan 50 abuts against the base plate 30, the pin header and the female header are connected to achieve electrical connection, which is simple and efficient.

[0066] The cooling fan 50 is detachably connected to at least one of the positioning frame 20 and the base plate 30 via magnetic attraction. For example, in this embodiment, as... Figure 14As shown, a first magnetic 52 is provided on the back of the top of the cooling fan 50 (in other embodiments, the first magnetic 52 can also be provided on both sides of the cooling fan 50), and a second magnetic 52 is provided at the bottom of the cooling fan 50 (hidden inside the bottom of the bracket of the cooling fan 50, so it is not shown). Figure 6 As shown, the positioning frame 20 is provided with a third magnetic member 27 that is attracted to the first magnetic member 52, such as... Figure 11 As shown, the base plate 30 is provided with a fourth magnetic member 32 that attracts the second magnetic member. The top of the cooling fan 50 is magnetically secured using the first magnetic member 52 and the third magnetic member 27, and the bottom of the cooling fan 50 is magnetically secured using the second magnetic member 27 and the fourth magnetic member 32, thus improving the stability of the cooling fan 50 installation. For example, the first magnetic member 52 and the second magnetic member are both magnets, while the third magnetic member 27 and the fourth magnetic member 32 are both iron sheets.

[0067] Brief description of working principle:

[0068] like Figure 15 and Figure 16 As shown, during assembly, the PCB board 40 is first mounted on the base plate 30. Then, the positioning frame 20 and the base plate 30 are respectively mounted on the outer periphery of the heat dissipation fin assembly 13 of the heat sink 10, so that the positioning frame 20 and the base plate 30 form a slide rail structure for sliding connection of the cooling fan 50. For example, the positioning frame 20 can be first placed on the heat dissipation fin assembly 13 from top to bottom, and then the top of the positioning frame 20 can be locked to the top of the heat dissipation fin assembly 13 by the first screw 25. Next, the base plate 30 is inserted from the front of the heat dissipation fin assembly 13 into the bottom of the positioning frame 20, and then the base plate 30 is locked to the bottom of the heat dissipation fin assembly 13 by the second screw 31.

[0069] like Figure 17 and Figure 18 As shown, the cooling fan 50 is then slid down into the fan slot 21 until the bottom of the cooling fan 50 abuts against the base plate 30. At this time, the cooling fan 50 is magnetically fixed, and the second electrical contact 51 at the bottom of the cooling fan 50 establishes an electrical connection with the first electrical contact 41 on the PCB board 40. The PCB board 40 is then connected to the fan interface of the electronic device through the wire harness 42.

[0070] The cooling fan 50 is detachable by using a sliding installation and magnetic fixation method. Users can easily install or remove the cooling fan 50 by simply pulling it up or down. Furthermore, since the cooling fan 50 is detachably connected to the PCB board 40 via electrical contacts, and the wiring harness 42 is moved to the PCB board 40, no manipulation of the wiring harness 42 is required when installing or removing the cooling fan 50.

[0071] In addition, combined Figures 1 to 3As shown, in this embodiment, both sides of the positioning frame 20 are closed structures, which forces the airflow to flow only between the first air vent 22 and the second air vent 23, thus rectifying the airflow.

[0072] The aforementioned sliding quick-release fan heat dissipation module 100 utilizes the positioning frame 20 and the base plate 30 to achieve sliding and magnetic installation of the heat dissipation fan 50, and transfers the wiring harness 42 from the heat dissipation fan 50 to the PCB board 40 on the base plate 30. The heat dissipation fan 50 and the PCB board 40 are connected by electrical contacts, which not only reduces the difficulty of disassembling and assembling the fan, but also reduces the risk of damage or poor contact between the fan and the fan interface during disassembly and assembly.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The above embodiments only illustrate preferred implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A heat dissipation module of a sliding quick-release fan, characterized in that, include: heat sink; The heat sink includes: a base, a heat pipe connected to the base, and a heat dissipation fin assembly sleeved on the heat pipe. A positioning frame is fitted onto the heat sink; the positioning frame surrounds the outer periphery of the heat sink fin assembly; the top of the positioning frame is provided with a fan slide groove arranged from top to bottom; the front of the positioning frame is provided with a first air vent; the back of the positioning frame is provided with a second air vent; the line connecting the first air vent and the second air vent is aligned with the airflow direction of the heat sink fin assembly; the bottom of the positioning frame is provided with a storage groove for receiving the heat sink fin assembly, and the storage groove and the fan slide groove are connected along the airflow direction of the heat sink fin assembly. A base plate connected to the bottom of the positioning frame; the base plate has a U-shaped plate structure and is located at the bottom of the heat dissipation fin assembly; A PCB board mounted on the base plate; the PCB board is provided with a first electrical contact and a wiring harness extending outside the positioning frame; and A cooling fan is slidably connected to the positioning frame; the cooling fan is inserted into the fan slot from top to bottom and abuts against the base plate; the bottom of the cooling fan is provided with a second electrical contact that is electrically connected to the first electrical contact; the cooling fan is detachably connected to at least one of the positioning frame and the base plate by magnetic attraction.

2. The fan module of claim 1, wherein: The cooling fan has a first magnetic component on the back or sides of its top end, and a second magnetic component on its bottom end; the positioning frame has a third magnetic component that attracts the first magnetic component, and the base plate has a fourth magnetic component that attracts the second magnetic component.

3. The fan module of claim 1, wherein: The first electrical contact is a conductive spring, and the second electrical contact is a metal pin.

4. The fan module of claim 1, wherein: The first electrical contact is a pin header, and the second electrical contact is a female header.

5. The fan module of claim 1, wherein: The positioning frame is connected to the top of the heat dissipation fin assembly by a first screw, and the base plate is connected to the bottom of the heat dissipation fin assembly by a second screw.

6. The fan module of claim 1, wherein: The positioning frame is connected to the base plate by a third screw, and the heat dissipation fin assembly is snapped between the positioning frame and the base plate.

7. The fan module of claim 1, wherein: The bottom of the positioning frame is provided with a limiting groove along the air duct direction of the heat dissipation fin assembly; the two sides of the base plate are inserted into the bottom of the positioning frame along the limiting groove.

8. The fan module of claim 1, wherein: The PCB board is snapped onto the base plate.

9. The fan module of claim 1, wherein: Both sides of the positioning frame are closed structures.

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