Heat dissipation device

Abstract

The utility model discloses a heat dissipation device, and relates to the technical field of servers, and the heat dissipation device comprises a fan assembly; the vibration isolation structure is connected with the fan assembly, the vibration isolation structure is provided with a first vibration isolation face, and the first vibration isolation face protrudes out of the peripheral face of the fan assembly so as to be used for making contact with an outer frame surrounding the fan assembly; the first vibration isolation face is matched with the inner wall face of the outer frame body. According to the fan vibration isolation device, the problem that the vibration isolation effect of a fan vibration isolation device in the related technology is poor is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of servers, and in particular to a heat dissipation device. BACKGROUND

[0002] At present, in the field of server heat dissipation design, the vibration generated by the fan as a key heat dissipation component during operation cannot be ignored. In particular, in the design of a 1U server, due to the height limit, the gap between the fan and the case is very limited, usually only about 0.3-0.5mm. Although the above narrow gap helps to improve the heat dissipation efficiency, it also aggravates the vibration transmission of the fan to the case during high-speed rotation, causing unnecessary influence on the internal sensitive components such as hard disks, PCIE cards, etc., thereby affecting the stability and service life of the server.

[0003] In the related art, the fan vibration isolation device usually uses the side of the circular pad to buffer the vibration. However, the compression amount of the above vibration isolation method is not easy to control, and is prone to deformation failure due to forward and backward displacement, thereby affecting the shock isolation effect. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a heat dissipation device to at least solve the problem of poor vibration isolation effect of the fan vibration isolation device in the related art.

[0005] The present application provides a heat dissipation device, comprising: a fan assembly; a vibration isolation structure connected with the fan assembly, the vibration isolation structure having a first vibration isolation surface, the first vibration isolation surface protruding from the outer peripheral surface of the fan assembly for contacting an outer frame body surrounding the fan assembly; wherein the first vibration isolation surface is adapted to the inner wall surface of the outer frame body.

[0006] Further, the height of the first vibration isolation surface protruding from the outer peripheral surface of the fan assembly is h, satisfying: 0.2mm≤h≤0.6mm.

[0007] Further, the part of the vibration isolation structure forming the first vibration isolation surface is made of an elastic material.

[0008] Further, the vibration isolation structure comprises a connecting portion, the connecting portion comprising: a connecting rod, the connecting rod being arranged in the fan assembly to connect with the fan assembly; a stop head, the stop head being connected with one end of the connecting rod to limit and stop at least part of the fan assembly; wherein the stop head has the first vibration isolation surface.

[0009] Further, the stop head comprises: a circular plate; an extension portion, the extension portion being arranged on the circular plate to extend along the radial direction of the circular plate, the surface of the extension portion away from the central axis of the circular plate being the first vibration isolation surface; wherein the fan assembly has a clamping recess, the extension portion extending into the clamping recess and being limited and matched with the clamping recess.

[0010] Further, the extension part is an extension plate, a plate surface of the extension plate facing the fan assembly is arranged flush with a plate surface of the circular plate facing the fan assembly, wherein a plate thickness of the extension plate is consistent with a plate thickness of the circular plate, or the plate thickness of the extension plate is greater than the plate thickness of the circular plate.

[0011] Further, the fan assembly comprises a fan body and a protective net, the stop head is used for limiting and stopping with the protective net, the connecting rod comprises a penetrating rod segment penetrating in the fan body and the protective net plate, a first end of the penetrating rod segment is connected with the stop head, a tapered rod segment, a large-diameter end of the tapered rod segment is connected with a second end of the penetrating rod segment, the tapered rod segment has a deformation opening penetrating through the large-diameter end, wherein the tapered rod segment has an initial state and a deformed state, in the process that the tapered rod segment penetrates into the protective net and the fan body in turn, the size of the deformation opening is reduced to reduce the outer diameter of the tapered rod segment, and the tapered rod segment is in the deformed state, after the tapered rod segment penetrates through the fan body, the size of the deformation opening restores to the initial size, the tapered rod segment restores from the deformed state to the initial state to limit and stop with the fan body.

[0012] Further, the vibration isolation structure further comprises a partition plate arranged on the connecting rod, and the partition plate is located between the fan body and the protective net.

[0013] Further, the stop head further comprises a convex bump arranged on a plate surface of the circular plate and / or the extension part away from the fan assembly, an outer surface of the convex bump forms a second vibration isolation surface, and the second vibration isolation surface is used for contacting a side frame body located on one side of the fan assembly.

[0014] Further, the extension part comprises two first plate bodies arranged oppositely, and a second plate body located on one side of the two first plate bodies and connected with the two first plate bodies, wherein one side of each first plate body away from the second plate body has a mounting notch, the circular plate extends into and is connected with the mounting notch, a plate surface of the second plate body away from the circular plate forms a first vibration isolation surface, and a side edge of at least one first plate body protrudes from a plate surface of the circular plate away from the fan assembly to form a second vibration isolation surface.

[0015] According to the technical scheme of the utility model, the first vibration isolation surface can accurately control the compression amount when the fan assembly is installed into the outer frame body, and the compression amount is based on the height of the protrusion, which can ensure that the compression state of the vibration isolation structure remains consistent after each assembly, thereby avoiding the difference in vibration isolation effect caused by unstable compression amount. Meanwhile, when the first vibration isolation surface is in adaptive contact with the inner wall surface of the outer frame body, a stable buffer area can be formed, and even if the fan assembly vibrates during the operation of the server, the transmission of vibration energy can be effectively blocked, thereby solving the problem of poor vibration isolation effect of the fan vibration isolation device in the related art, reducing the influence of vibration on sensitive components such as hard disks and PCIe cards in the server, and greatly improving the stability and data security of the system. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative effort.

[0017] Figure 1 A perspective structural schematic view of the heat dissipation device provided by the embodiment of the present application is shown;

[0018] Figure 2 A perspective structural schematic view of the vibration isolation structure of the heat dissipation device in Figure 1 is shown;

[0019] Figure 3 A side view of the heat dissipation device in Figure 1 is shown;

[0020] Figure 4 A perspective structural schematic view of the protective net of the heat dissipation device in Figure 1 is shown;

[0021] Figure 5 A perspective structural schematic view of the heat dissipation device provided by the second embodiment of the present application is shown;

[0022] Figure 6 A side view of the heat dissipation device in Figure 5 is shown;

[0023] Figure 7 A front view of the heat dissipation device in Figure 5 is shown;

[0024] Figure 8 A perspective structural schematic view of the vibration isolation structure of the heat dissipation device in Figure 5 is shown;

[0025] Figure 9 A side view of the vibration isolation structure in Figure 8 is shown.

[0026] Among the above drawings, the following reference signs are included:

[0027] 10, fan assembly; 11, clamping recess; 12, fan body; 13, protective net;

[0028] 20, vibration isolation structure; 21, first vibration isolation surface; 22, connecting portion; 221, connecting rod; 2211, through rod segment; 2212, tapered rod segment; 2213, deformation opening; 222, stop head; 2221, circular plate; 2222, extension; 2222a, first plate body; 2222b, second plate body; 2222c, mounting gap; 2223, convex bump; 23, partition; 24, second vibration isolation surface. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0030] It should be noted 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" and the like 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 the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium, or communication between two elements. The terms "parallel", "perpendicular", "equal" include the described cases and the approximate cases similar to the described cases, and the approximate cases are within an acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art considering the measurement being discussed and the error related to the measurement of a specific quantity, i.e. the limitation of the measurement system. For example, "parallel" includes absolute parallel and approximate parallel, wherein the acceptable deviation range of approximate parallel can be, for example, within 5°; "perpendicular" includes absolute perpendicular and approximate perpendicular, wherein the acceptable deviation range of approximate perpendicular can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equalities is less than or equal to 5% of either. For a person of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0031] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] In order to solve the problem of poor vibration isolation effect of the fan vibration isolation device in the related art, the present application provides a heat dissipation device.

[0033] Embodiment one

[0034] As shown in Figures 1 to 4 The heat dissipation device includes a fan assembly 10 and a vibration isolation structure 20. The vibration isolation structure 20 is connected with the fan assembly 10, and the vibration isolation structure 20 has a first vibration isolation surface 21 which protrudes from the outer peripheral surface of the fan assembly 10 for contacting the outer frame body surrounding the fan assembly 10; wherein the first vibration isolation surface 21 is adapted to the inner wall surface of the outer frame body.

[0035] By applying the technical solution of the present embodiment, the first vibration isolation surface 21 can accurately control the compression amount when the fan assembly 10 is installed into the outer frame body, and the compression amount is based on the height of the protrusion, which can ensure that the compression state of the vibration isolation structure 20 remains consistent after each assembly, thereby avoiding the difference in vibration isolation effect caused by unstable compression amount. At the same time, when the first vibration isolation surface 21 is in contact with the inner wall surface of the outer frame body, a stable buffer area can be formed; during the operation of the server, even if the fan assembly 10 vibrates, the transmission of vibration energy can be effectively blocked, thereby solving the problem of poor vibration isolation effect of the fan vibration isolation device in the related art, reducing the influence of vibration on sensitive components inside the server such as hard disks and PCIe cards, and greatly improving the stability and data security of the system.

[0036] Optionally, the height of the first vibration isolation surface 21 protruding from the outer peripheral surface of the fan assembly 10 is h, satisfying: 0.2mm≤h≤0.6mm. In this way, within the above height range, the protruding design of the first vibration isolation surface 21 can ensure that the vibration isolation structure 20 can obtain the best compression amount when the fan assembly 10 is installed; if the height h is too small, it may not be able to effectively absorb vibration, and if it is too large, it may lose elasticity or cause poor contact when compressed. At the same time, the range of 0.2mm to 0.6mm is selected to adapt to the installation environment and working condition requirements of different models of servers or devices. For example, in the case of relatively compact internal space of the server, a smaller h value can be selected to ensure the feasibility of installation; while in the case of relatively loose space, a larger h value can be selected to enhance the vibration isolation effect.

[0037] In the present embodiment, the height h of the first vibration isolation surface 21 protruding from the outer circumferential surface of the fan assembly 10 satisfies: h = 0.4 mm. In this way, by setting the protruding height of the first vibration isolation surface 21 to 0.4 mm, sufficient deformation space is ensured for the vibration isolation structure 20 to absorb vibration energy when subjected to a load, while also ensuring that it can quickly return to its original state when not under stress, maintaining good vibration isolation performance and structural stability.

[0038] It should be noted that the value of h is not limited thereto and can be adjusted according to usage requirements and working conditions. Alternatively, the height h of the first vibration isolation surface 21 protruding from the outer circumferential surface of the fan assembly 10 is 0.3 mm, or 0.35 mm, or 0.45 mm, or 0.50 mm, or 0.55 mm.

[0039] In the present embodiment, the portion of the vibration isolation structure 20 forming the first vibration isolation surface 21 is made of an elastic material. In this way, the elastic material has good deformation ability, and when the first vibration isolation surface 21 comes into contact with the inner wall surface of the outer frame, even if subjected to impact and vibration caused by rotation of the fan assembly 10, the elastic material can quickly absorb and buffer these vibration energies, preventing vibration from being transmitted to the internal hardware of the server, thereby protecting critical components such as hard disks, memories, PCIe cards, etc. from vibration damage, and improving the overall stability and data security of the system. At the same time, the elastic material can automatically adjust its deformation degree according to the actual contact pressure, which means that the first vibration isolation surface 21 can automatically adjust the contact pressure with the outer frame according to the vibration intensity under different working conditions, avoiding overpressure or insufficient contact, and ensuring the stability and consistency of the vibration isolation effect.

[0040] Alternatively, the portion of the vibration isolation structure 20 forming the first vibration isolation surface 21 is made of at least one of rubber, silicone, and sponge.

[0041] As shown in Figure 2 The vibration isolation structure 20 includes a connecting portion 22, which includes a connecting rod 221 and a stop head 222. The connecting rod 221 is arranged in the fan assembly 10 to connect with the fan assembly 10. The stop head 222 is connected with one end of the connecting rod 221 to limit and stop at least part of the fan assembly 10. The stop head 222 has the first vibration isolation surface 21. In this way, the connecting rod 221 is arranged in the fan assembly 10 to form a stable connection, ensuring the fixation and positioning of the vibration isolation structure 20 in the fan assembly. At the same time, the stop head 222 not only serves to limit and stop the fan assembly 10 to improve the structural stability of the fan assembly 10, but also plays a vibration isolation function, so that the vibration isolation and installation of the fan assembly 10 can be completed at one time, avoiding the use of additional vibration isolation pads or cushioning materials, simplifying the assembly process, and also ensuring the realization of the vibration isolation effect, improving the stability of the fan assembly installation and the vibration isolation performance.

[0042] In the embodiment, the first vibration isolation surface 21 on the stop head 222 is designed, and the protruding height h thereof can be accurately controlled, so that a preset deformation space is formed between the fan assembly 10 and the outer frame. When the fan assembly 10 operates to generate vibration, the first vibration isolation surface 21 can be deformed according to the preset compression amount, effectively absorbing and buffering the vibration energy, thereby ensuring the predictability and consistency of the vibration isolation effect, avoiding the fluctuation of the vibration isolation performance caused by excessive compression or insufficient of the vibration isolation material, and improving the stability and reliability of the internal hardware of the server during long-time operation.

[0043] As shown in Figure 2 The stop head 222 includes a circular plate 2221 and an extension 2222. The extension 2222 is arranged on the circular plate 2221 to extend in the radial direction of the circular plate 2221, and the surface of the extension 2222 away from the central axis of the circular plate 2221 is the first vibration isolation surface 21. The fan assembly 10 has a clamping recess 11, and the extension 2222 extends into the clamping recess 11 and is limitedly matched with the clamping recess 11. In this way, the extension 2222 extends into the clamping recess 11 of the fan assembly 10, and accurate positioning is achieved through limited matching, thereby ensuring the stable connection of the stop head 222 during installation of the fan assembly, and effectively preventing displacement of the fan during operation due to vibration, avoiding collision or friction between the fan and other components in the case, thereby improving the overall stability and safety of the system. At the same time, the first vibration isolation surface 21 is located on the surface of the extension 2222 away from the central axis of the circular plate, and when the fan assembly 10 is installed in place, the first vibration isolation surface 21 directly contacts the case or the outer frame to form a vibration isolation barrier, thereby accurately controlling the compression amount of the vibration isolation material and avoiding the instability of the vibration isolation effect caused by uneven compression of the traditional vibration isolation pad.

[0044] Optionally, the extension 2222 is an extension plate, and the plate surface of the extension plate facing the fan assembly 10 is flush with the plate surface of the circular plate 2221 facing the fan assembly 10; wherein the plate thickness of the extension plate is consistent with the plate thickness of the circular plate 2221; or the plate thickness of the extension plate is greater than the plate thickness of the circular plate 2221. In this way, when the plate surface of the extension plate is flush with the plate surface of the circular plate 2221 facing the fan assembly, a continuous and flat support surface can be formed; during installation or operation of the fan assembly, stress can be uniformly distributed on the circular plate 2221 and the extension 2222, avoiding excessive stress concentration on one side of the material, thereby reducing the risk of structural damage and improving the reliability of the entire vibration isolation structure. At the same time, if the plate thickness of the extension plate is greater than the plate thickness of the circular plate 2221, the extension 2222 can provide more deformation space and stronger elasticity when contacting the fan assembly 10, thereby more effectively absorbing and buffering vibration energy, reducing vibration transmission to other parts of the server, protecting sensitive components such as hard disks and PCIE cards from vibration, and improving the overall operation stability of the server.

[0045] In the present embodiment, the plate thickness of the extension plate is consistent with the plate thickness of the circular plate 2221.

[0046] As shown in Figure 2 and Figure 3 , the vibration isolation structure 20 further comprises a partition plate 23. The partition plate 23 is arranged on the connecting rod 221 and located between the fan body and the protective net. In this way, the above arrangement of the partition plate 23 can form an auxiliary air flow guiding structure between the fan body 12 and the protective net 13, which helps to guide and organize the air flow path entering or discharging, not only can reduce the turbulence phenomenon of air flow in the transmission process, improve the straightness and uniformity of air flow, thereby optimize the heat dissipation efficiency, but also can reduce the noise problem caused by air flow confusion. At the same time, by placing the partition plate 23 between the fan body 12 and the protective net 13, a physical barrier can be established between the two, further enhancing the vibration isolation effect. When the fan body 12 is running, the partition plate 23 can play a secondary vibration isolation role, that is, in addition to the first vibration isolation surface 21 of the stop head 222 directly absorbing the vibration of the fan, the partition plate 23 can also slow down the propagation of vibration through its elastic deformation, especially for those indirect vibrations generated by aerodynamic effect, which improves the vibration isolation performance of the whole system, reduces the influence of vibration on other sensitive elements inside the server, and further improves the stability and reliability of the server.

[0047] As shown in Figure 1 , Figure 2 and Figure 4As shown, the fan assembly 10 includes a fan body 12 and a protective screen 13, and the stop head 222 is used for limiting stop with the protective screen 13; the connecting rod 221 includes a penetrating rod segment 2211 and a tapered rod segment 2212. The penetrating rod segment 2211 penetrates the fan body 12 and the protective screen 13 plate, and the first end of the penetrating rod segment 2211 is connected with the stop head 222. The large-diameter end of the tapered rod segment 2212 is connected with the second end of the penetrating rod segment 2211, and the tapered rod segment 2212 has a deformation opening 2213 penetrating the large-diameter end. Among them, the tapered rod segment 2212 has an initial state and a deformed state, in the process of the tapered rod segment 2212 penetrating into the protective screen 13 and the fan body 12 in turn, the size of the deformation opening 2213 is reduced to reduce the outer diameter of the tapered rod segment 2212, and the tapered rod segment 2212 is in the deformed state; after the tapered rod segment 2212 penetrates the fan body 12, the size of the deformation opening 2213 restores to the initial size, and the tapered rod segment 2212 restores from the deformed state to the initial state to limit stop with the fan body 12. In this way, the limiting stop between the stop head 222 and the protective screen 13, combined with the penetrating design of the connecting rod 221, ensures the structural stability of the fan assembly 10 after installation. At the same time, the tapered rod segment 2212 restores to the initial state after penetrating the fan body 12, and forms a stable connection with the fan body 12, which not only enhances the overall structural rigidity of the fan assembly, but also further improves the vibration isolation effect.

[0048] In this embodiment, during the operation of the fan body 12, the stop head 222 and the connecting rod 221 can effectively absorb and disperse vibration, reducing the positional deviation or structural relaxation caused by vibration, thereby reducing the influence of vibration on other components inside the server and ensuring the stable operation of the server. At the same time, the large-diameter end of the tapered rod segment 2212 is connected with the second end of the penetrating rod segment 2211 and has a deformation opening 2213 penetrating the large-diameter end, thereby enabling the tapered rod segment to adaptively connect on protective screens or fan body plates of different thicknesses. In this way, the size change of the deformation opening 2213 allows the tapered rod segment 2212 to adjust the outer diameter according to actual needs during assembly, thereby adapting to protective screens and fan bodies of different specifications or material thicknesses, increasing the flexibility and adaptability of the connecting structure, and helping to realize a universal vibration isolation solution in servers of different models or designs.

[0049] Optionally, the tapered rod segment 2212 is sleeved with a spring to play a vibration isolation effect on the tapered rod segment 2212 and the fan body 12 through the spring.

[0050] Optionally, the stop head 222 further includes a protrusion 2223. The protrusion 2223 is disposed on the surface of the circular plate 2221 and / or the extension 2222 facing away from the fan assembly 10. The outer surface of the protrusion 2223 forms a second vibration isolation surface 24, which is used to contact the side frame located on one side of the fan assembly 10. Thus, the second vibration isolation surface 24, together with the first vibration isolation surface 21, forms a double vibration isolation barrier. Not only can the contact surface between the stop head 222 and the fan assembly 10 (the first vibration isolation surface 21) absorb and buffer vibrations during fan operation, but the second vibration isolation surface 24, which contacts the side frame, can also effectively reduce the transmission of vibrations to the server chassis. This double vibration isolation design significantly improves the overall vibration reduction capability of the vibration isolation structure, enabling more comprehensive control and reduction of internal server vibrations, protecting sensitive components from vibration, and improving server stability.

[0051] like Figure 2 As shown, the stop head 222 also includes a protrusion 2223. The protrusion 2223 is disposed on the surface of the circular plate 2221 facing away from the fan assembly 10. The outer surface of the protrusion 2223 forms a second vibration isolation surface 24, which is used to contact the side frame located on one side of the fan assembly 10. Thus, the height of the protrusion 2223 is set as the pre-compression amount of the vibration isolation material. Through contact with the side frame, the compression deformation of the vibration isolation material can be precisely controlled, avoiding unstable vibration isolation effects caused by over-compression or under-compression. This precise control ensures that the performance of the protrusion 2223 is consistent after each installation, avoiding fluctuations in vibration isolation effects caused by installation differences, and improving product reliability and consistency.

[0052] Example 2

[0053] The difference between the heat dissipation device in Embodiment 2 and Embodiment 1 is that the structure of the extension is different.

[0054] like Figures 5 to 9As shown, the extension 2222 includes two oppositely arranged first plate bodies 2222a and a second plate body 2222b. The second plate body 2222b is located on one side of the two first plate bodies 2222a and connected with the two first plate bodies 2222a. Each first plate body 2222a has a mounting notch 2222c on the side away from the second plate body 2222b, and the circular plate 2221 extends into and is connected with the mounting notch 2222c. The plate surface of the second plate body 2222b away from the circular plate 2221 forms the first vibration isolation surface 21. The side edge of at least one first plate body 2222a protrudes from the plate surface of the circular plate 2221 away from the fan assembly 10 to form the second vibration isolation surface 24. In this way, by arranging two first plate bodies 2222a and a second plate body 2222b and connecting them with each other, the extension 2222 has higher rigidity and stability, can more effectively resist deformation caused by fan rotation and external impact, and ensures that the vibration isolation structure 20 maintains good vibration isolation effect during long-term use.

[0055] In the present embodiment, the above arrangement of the first vibration isolation surface 21 and the second vibration isolation surface 24 forms a double vibration isolation mechanism. The vibration isolation surface formed by the second plate body 2222b can directly contact the side frame of the server and effectively absorb and disperse vibration energy from the structural direction; and the second vibration isolation surface 24 formed by the side edge of the first plate body 2222a can contact other parts of the fan assembly 10, further reducing the transmission of fan vibration to the inside of the server.

[0056] The above describes in detail a heat dissipation device provided by the present application. The principles and implementation modes of the present application are described by applying specific examples, and the above description of the embodiments is only used to help understand the method of the present application and its core idea. It should be noted that for those skilled in the art, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A heat dissipating device, characterized by, The application relates to a fan assembly (10) and a vibration isolation structure (20) connected with the fan assembly (10), wherein the vibration isolation structure (20) has a first vibration isolation surface (21) protruding from the outer circumferential surface of the fan assembly (10) and used for contacting an outer frame body surrounding the fan assembly (10), and the first vibration isolation surface (21) is matched with the inner wall surface of the outer frame body. The height h of the first vibration isolation surface (21) protruding from the outer circumferential surface of the fan assembly (10) satisfies 0.2mm<=h<=0.6mm. The part of the vibration isolation structure (20) forming the first vibration isolation surface (21) is made of an elastic material.

2. The heat dissipating device according to claim 1, wherein The vibration isolation structure (20) comprises a connecting part (22), which comprises:

3. The heat dissipating device of claim 1, wherein a connecting rod (221) penetrating into the fan assembly (10) and connected with the fan assembly (10); 4. The heat dissipating device of claim 1, wherein a stop head (222) connected with one end of the connecting rod (221) and used for limiting and stopping at least part of the fan assembly (10); wherein the stop head (222) has the first vibration isolation surface (21). The stop head (222) comprises: a circular plate (2221); 5. The heat dissipating device of claim 4, wherein an extension part (2222) arranged on the circular plate (2221) and extending along the radial direction of the circular plate (2221), and the surface of the extension part (2222) away from the central axis of the circular plate (2221) is the first vibration isolation surface (21); wherein the fan assembly (10) has a clamping recess (11), the extension part (2222) extends into the clamping recess (11) and is limited and matched with the clamping recess (11). The extension part (2222) is an extension plate, and the plate surface of the extension plate towards the fan assembly (10) is arranged flush with the plate surface of the circular plate (2221) towards the fan assembly (10); wherein, the plate thickness of the extension plate is consistent with the plate thickness of the circular plate (2221); or, 6. The heat dissipating device of claim 5, wherein the plate thickness of the extension plate is greater than the plate thickness of the circular plate (2221). The fan assembly (10) comprises a fan body (12) and a protective net (13), the stop head (222) is used for limiting and stopping the protective net (13), and the connecting rod (221) comprises: a penetrating rod segment (2211) penetrating the plate of the fan body (12) and the protective net (13), and the first end of the penetrating rod segment (2211) is connected with the stop head (222); 7. The heat dissipating device of claim 4, wherein a tapered rod segment (2212) having a large-diameter end connected with the second end of the penetrating rod segment (2211), and the tapered rod segment (2212) has a deformation opening (2213) penetrating the large-diameter end; and a connecting rod segment (2213) connected with the deformation opening (2213) of the tapered rod segment (2212) and the second end of the penetrating rod segment (2211). ​ The conical rod segment (2212) has an initial state and a deformed state, in the process of sequentially penetrating into the protective net (13) and the fan body (12), the size of the deformation opening (2213) is reduced to reduce the outer diameter of the conical rod segment (2212), and the conical rod segment (2212) is in the deformed state; after the conical rod segment (2212) penetrates through the fan body (12), the size of the deformation opening (2213) returns to the initial size, and the conical rod segment (2212) returns from the deformed state to the initial state to limit and stop with the fan body (12).

8. The heat dissipating device according to claim 7, wherein The vibration isolation structure (20) further comprises: A partition plate (23) is arranged on the connecting rod (221), and the partition plate (23) is located between the fan body (12) and the protective net (13).

9. The heat dissipating device of claim 5, wherein, The stop head (222) further comprises: A convex bump (2223) is arranged on the plate surface of the circular plate (2221) and / or the extension (2222) away from the fan assembly (10), and an outer surface of the convex bump (2223) forms a second vibration isolation surface (24), and the second vibration isolation surface (24) is used to contact a side frame located on one side of the fan assembly (10).

10. The heat dissipating device of claim 5, wherein, The extension (2222) comprises: Two first plate bodies (2222a) are arranged oppositely; A second plate body (2222b) is located on one side of the two first plate bodies (2222a) and connected with the two first plate bodies (2222a); Each first plate body (2222a) has a mounting notch (2222c) on a side away from the second plate body (2222b), the circular plate (2221) extends into the mounting notch (2222c) and is connected with the mounting notch (2222c); and a plate surface of the second plate body (2222b) away from the circular plate (2221) forms the first vibration isolation surface (21); A side edge of at least one first plate body (2222a) protrudes from a plate surface of the circular plate (2221) away from the fan assembly (10) to form a second vibration isolation surface (24).

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