Fin and heat dissipation device

Abstract

The utility model provides a fin and a heat dissipation device. The fin comprises a body and a pulsating heat pipe. The pulsating heat pipe is arranged on the body; in the direction perpendicular to the extension face of the body, the orthographic projection of the pulsating heat pipe is completely located on the body. By means of the arrangement, the fin is applied to the heat dissipation device for phase change heat dissipation, heat is transmitted to the fin, the body serves as a component for increasing the heat exchange area, the body can generate a certain heat dissipation effect, meanwhile, the pulsating heat pipe can further enhance the heat dissipation effect on the body, the pulsating heat pipe is filled with a phase change working medium, and the heat dissipation efficiency is improved. The fins have very excellent heat dissipation efficiency; moreover, the pulsating heat pipe completely exists in an area covered by the body, so that the shape of the whole edge of the fin is regular, a simple and reliable connection relation is easily formed between the fin and other external structures, and the feasibility of applying the fin to various types of heat dissipation devices is high; the problem of how to improve the heat dissipation efficiency of the heat dissipation device in the prior art so as to meet the operation requirement of high-heat-yield equipment is solved.

Description

Technical Field

[0001] The present application relates to the technical field of heat dissipation of electronic equipment, and in particular to a fin and a heat dissipation device. Background Art

[0002] Due to the high heat generation of electronic devices such as servers and communication base stations, heat dissipation from the heat generating components is generally required to ensure normal operation. In the prior art, heat dissipation devices are often installed in the corresponding locations of the heat generating components to achieve rapid heat dissipation. However, with the continuous development of electronic and communication technologies, as well as the upgrading and iteration of equipment, the power of outdoor communication base stations continues to increase, and the heat dissipation requirements are also becoming increasingly stringent. Improving the heat dissipation efficiency of heat dissipation devices has become particularly important. Utility Model Content

[0003] In view of this, the present application provides a fin and a heat dissipation device to solve the problem in the prior art of how to improve the heat dissipation efficiency of the heat dissipation device to meet the operating requirements of high heat generation equipment.

[0004] In order to achieve the above objectives, this application provides the following technical solutions:

[0005] A fin, comprising:

[0006] ontology;

[0007] a pulsating heat pipe, disposed on the body;

[0008] Wherein, in a direction perpendicular to the extension surface of the main body, the orthographic projection of the pulsating heat pipe is completely located on the main body.

[0009] Optionally, the pulsating heat pipe includes a straight section and a curved section, the curved section is at least distributed at a position close to the heat absorbing side of the body, and the straight section is arranged away from the heat absorbing side.

[0010] Optionally, a plurality of the pulsating heat pipes are provided on the main body, and all the pulsating heat pipes are provided independently of each other.

[0011] Optionally, the pulsating heat pipe includes a main body section and a variable diameter section, and the flow area of the variable diameter section is different from the flow area of the main body section.

[0012] Optionally, the body is a blown plate, and the pulsating heat pipe is a sealed channel formed in the body;

[0013] Alternatively, the main body includes two welded split plates, and at least one of the split plates is a milled or stamped part with a groove, and the groove is sealed to form the pulsating heat pipe;

[0014] Alternatively, the body is a plate, and the pulsating heat pipe is a coil and is welded to the surface of the plate.

[0015] A heat dissipation device comprises a connecting plate and any one of the above-mentioned fins, wherein the fins are arranged in a plurality and arranged side by side. The connecting plate is a solid metal plate and is used to connect the plurality of fins.

[0016] Optionally, all of the fins are connected to the same connecting plate;

[0017] Alternatively, a plurality of connecting plates are provided, and a single connecting plate connects any two adjacent fins.

[0018] Optionally, the heat-absorbing side of the body is connected to the connecting plate, and in the extension direction of the heat-absorbing side, the body is completely located in the connecting plate.

[0019] Optionally, on a side of the body connected to the connecting plate, the body extends beyond an edge of the connecting plate.

[0020] Optionally, the connecting plate is provided with an assembly groove, and the fin is inserted into the assembly groove;

[0021] Alternatively, the fins are welded to the surface of the connecting plate.

[0022] The fins provided in the present application include a body and a pulsating heat pipe; the pulsating heat pipe is arranged on the body; wherein, in the direction perpendicular to the extension surface of the body, the orthographic projection of the pulsating heat pipe is completely located on the body. With such an arrangement, the fins are applied to a heat dissipation device of phase change heat dissipation. During the operation of the heat dissipation device, heat is transferred to the fins. The body serves as a component for increasing the heat exchange area. While the body itself can produce a certain heat dissipation effect, the pulsating heat pipe can also enhance the heat dissipation effect of the body. There is a phase change medium in the pulsating heat pipe. On the evaporation side of the fin (that is, the heat absorption side of the body), the phase change medium absorbs heat to generate bubbles, which rapidly expand and increase the pressure, pushing the phase change medium to flow to the low-temperature condensation side. On the condensation side, the bubbles cool, shrink and burst, and the pressure drops. Due to the pressure difference between the two sides and the pressure imbalance between the connected pipe sections, the phase change medium Oscillating flow occurs between the evaporation side and the condensation side, thereby achieving heat transfer. In this way, the heat transfer process of the pulsating heat pipe is carried out not only through latent heat transfer, but also through liquid convection, which makes the fins have very excellent heat dissipation efficiency; moreover, the pulsating heat pipe is completely present in the area covered by the main body, which is conducive to the regular shape of the overall edge of the fin and easy to form a simple and reliable connection relationship with other external structures. The fins are highly feasible for use in various forms of heat dissipation devices, which makes it highly feasible to improve the heat dissipation efficiency of the heat dissipation device; it solves the problem of how to improve the heat dissipation efficiency of the heat dissipation device in the prior art to meet the operation requirements of high-heat-producing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0024] Figure 1 The pulsating heat pipe with fins provided in the embodiment of the present application is a schematic diagram of the overall structure;

[0025] Figure 2 A schematic diagram of a split structure of a pulsating heat pipe with fins provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of the assembly of the fins and the connecting plate provided in an embodiment of the present application;

[0027] Figure 4 This is a schematic diagram of the assembly of the fins provided in an embodiment of the present application, which are connected to the connecting plate and the temperature equalizing plate.

[0028] exist Figures 1-4 middle:

[0029] 1. Temperature plate; 2. Fins; 3. Liquid injection pipe; 4. Connecting plate;

[0030] 21. Main body; 22. Pulsating heat pipe;

[0031] 41. Assembly slot;

[0032] 211, heat absorption side;

[0033] 221. Straight line segment; 222. Curved line segment. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] like Figure 1-Figure 2As shown, the embodiment of the present application provides a fin 2, including a body 21 and a pulsating heat pipe 22; the pulsating heat pipe 22 is a closed capillary tube with a phase change medium inside, and the pulsating heat pipe 22 is arranged on the body 21; wherein, in the direction perpendicular to the extension surface of the body 21, the orthographic projection of the pulsating heat pipe 22 is completely located on the body 21, that is, all parts of the pulsating heat pipe 22 are located on the fin 2, and the pulsating heat pipe 22 is not in contact with, connected to, or together with the connecting plate 4 described later to form an inner cavity for accommodating the phase change medium. It should be noted that because the body 21 is a sheet structure, it must have two opposite and parallel surfaces, which are the largest in area and much larger than the other side surfaces. Therefore, the extension surface of the body 21 refers to the surface with the largest area of the body 21, or the surface formed by the long side and the wide side of the body 21.

[0036] With such a configuration, the fin 2 is applied to a heat dissipation device of phase change heat dissipation. During the operation of the heat dissipation device, heat is transferred to the fin 2. The main body 21 serves as a component for increasing the heat exchange area. The main body 21 itself can produce a certain heat dissipation effect. At the same time, the pulsating heat pipe 22 can also enhance the heat dissipation effect of the main body 21. There is a phase change medium in the pulsating heat pipe 22. On the evaporation side of the fin 2 (that is, the heat absorption side 211 of the main body 21), the phase change medium absorbs heat to generate bubbles, which rapidly expand and increase the pressure, pushing the phase change medium to flow to the low-temperature condensation side. On the condensation side, the bubbles cool, shrink and burst, and the pressure drops. Due to the pressure difference between the two sides and the pressure imbalance between the connected pipe sections, the phase change medium Oscillating flow occurs between the evaporation side and the condensation side, thereby realizing heat transfer. In this way, the heat transfer process of the pulsating heat pipe 22 is carried out not only through latent heat transfer, but also through liquid convection, so that the fin 2 has a very excellent heat dissipation efficiency; moreover, the pulsating heat pipe 22 is completely present in the area covered by the main body 21, which is conducive to the regular shape of the overall edge of the fin 2 and is easy to form a simple and reliable connection relationship with other external structures (such as the connecting plate 4 described later). The feasibility of using the fin 2 in various forms of heat dissipation devices is high, which makes it feasible to improve the heat dissipation efficiency of the heat dissipation device; it solves the problem of how to improve the heat dissipation efficiency of the heat dissipation device in the prior art to meet the operation requirements of high heat-producing equipment.

[0037] In a specific embodiment, the pulsating heat pipes 22 are connected in series end to end, that is, all the pipe sections of the pulsating heat pipes 22 on the body 21 are interconnected and form a whole. Figure 1 shown.

[0038] Furthermore, the pulsating heat pipe 22 includes a straight section 221 and a curved section 222. The curved section 222 is bent into a serpentine structure, or in other words, the curved section 222 is coil-shaped. The curved section 222 is at least located near the heat-absorbing side 211 of the body 21, while the straight section 221 is located away from the heat-absorbing side 211. The straight section 221 spans the curved section 222 and connects the front and rear ends of the curved section 222. The heat-absorbing side 211 of the body 21 is the side of the body 21 that is closer to the heat-generating element when the fin 2 is used in the heat dissipation device.

[0039] With such a configuration, since the curved segment 222 exists more on the heat-absorbing side 211 of the main body 21, when the bent portion of the curved segment 222 is close to the heat-absorbing side 211, the curved segment 222 has a larger heating area due to its bending and coiling, so that more phase-change working fluid participates in heat exchange here, and can more quickly transfer the heat absorbed by the main body 21 on the heat-absorbing side 211, thereby optimizing the heat dissipation efficiency of the fin 2.

[0040] In an optional embodiment, the pulsating heat pipe 22 includes a main section and a variable diameter section, wherein the flow area of the variable diameter section differs from that of the main section. The variable diameter section is a portion having a different diameter from the main section, and the variable diameter section may specifically be a narrowing or widening section. Furthermore, the variable diameter section preferably has a gradual change in diameter.

[0041] With this arrangement, the pulsating heat pipe 22 as a whole does not have the same diameter everywhere, but is locally reduced in diameter. The bend in the part of the pulsating heat pipe 22 away from the heat-absorbing side 211 of the main body 21 can be expanded. Since the local resistance at the bend is large, the phase-change medium is generally in a gas-liquid mixed state here, which is relatively difficult to pass through. Increasing the flow area here is conducive to weakening the resistance effect of the change in pipeline flow direction on the gas-liquid mixed phase-change medium, optimizing the dynamic flow of the phase-change medium in the pulsating heat pipe 22 as a whole, and thus optimizing the heat dissipation efficiency of the fin 2. Alternatively, the partial pipe section close to the heat-absorbing side 211 of the main body can be reduced in diameter, so that the liquid phase-change medium can quickly absorb heat and change to gas here, quickly generate bubbles and promote the flow circulation of the phase-change medium in the gas-liquid mixed state in the entire pulsating heat pipe 22, thereby optimizing the heat dissipation efficiency of the fin 2.

[0042] It should be noted that the diameter of the pulsating heat pipe 22 is very small, with an inner diameter generally being 0.5mm-3mm, and the operating performance is basically not affected by gravity. Therefore, the arrangement of the pulsating heat pipe 22 on the main body 21 and the extension direction relative to the heat absorbing side 211 of the main body 21 can be horizontal, vertical, or inclined.

[0043] In an optional embodiment, a plurality of pulsating heat pipes 22 are provided on the main body 21, and all pulsating heat pipes 22 are provided independently of each other. The pulsating heat pipes 22 can be straight pipes, curved pipes or annular pipes, and multiple pulsating heat pipes 22 are provided side by side, such as Figure 2 shown.

[0044] With such an arrangement, when the working environment of the heat dissipation device where the fin 2 is located is outdoors, even if the fin 2 is corroded or damaged, resulting in a pulsating heat pipe 22 being damaged, since the fin 2 has multiple independent phase change working fluid circulation bodies, all phase change working fluids will not leak out, so that the fin 2 can still retain most of the heat dissipation capacity.

[0045] Regarding the forming method of the pulsating heat pipe 22 on the main body 21, in a specific embodiment, the main body 21 is a blown plate, and the pulsating heat pipe 22 is a sealed channel formed in the main body 21; in this way, the main body 21 can be made of an aluminum plate, and a solder resist is coated on an aluminum plate according to the design shape of the pulsating heat pipe 22, and then covered with another aluminum plate. The two aluminum plates are pressure-welded and composited into a whole to form the main body 21. The solder resist is blown away by the blowing process to obtain a hollow flow channel, and the phase change medium can be injected into the hollow flow channel. The blowing process can produce an aluminum plate with good overall formability, which meets the forming requirements of the pulsating heat pipe 22 with complex design, and the fin 2 made in this way has strong structural stability.

[0046] Alternatively, the main body 21 includes two welded panels, and at least one of the panels is a milled or stamped part with a groove, and the groove is sealed to form the pulsating heat pipe 22; in this way, the main body 21 can be made of aluminum plate, and the aluminum plate is milled out with a groove by local material reduction using a CNC machine, or the groove is punched out by a stamping machine, and the two aluminum plates are brazed to form the main body 21, and the pulsating heat pipe 22 is formed at the same time, and the manufacturing process cost is low.

[0047] Alternatively, the main body 21 is a plate, and the pulsating heat pipe 22 is a coil and is welded to the surface of the plate; in this way, the pulsating heat pipe 22 can be made of an aluminum tube, which is additionally welded to the surface of the plate as an independent coil structure, and the manufacturing method is simple and easy.

[0048] It should be noted that the fin 2 also includes an injection pipe 3 connected to the pulsating heat pipe 22. The injection pipe 3 is used to evacuate the pulsating heat pipe 22 and inject phase change medium into the pulsating heat pipe 22. After the injection process is completed, the injection pipe 3 can be sealed.

[0049] Based on the aforementioned fins 2, an embodiment of the present application further provides a heat sink comprising a connecting plate 4 and the aforementioned fins 2. The fins 2 are provided in a plurality of parallel configurations. The connecting plate 4 is a solid metal plate and is used to connect the plurality of fins 2. Spacing is provided between the plurality of fins 2 to allow airflow to pass through. In this configuration, the connecting plate 4 serves to integrate the plurality of fins 2 while also stabilizing and reinforcing the structure of the fins 2. The connecting plate 4 may be made of aluminum or copper, for example.

[0050] Since the heat dissipation device has the above-mentioned fins 2 , the beneficial effects of the heat dissipation device brought about by the fins 2 can be found in the above content and will not be described in detail here.

[0051] It should be noted that the connecting plate 4 can form a surface contact with the heating element to achieve a thermal connection. The heat of the heating element is transferred to the fins 2 for heat dissipation through the conduction of the connecting plate 4. Alternatively, the heat dissipation device also includes an additional temperature-averaging plate 1. While the fins 2 are connected to the connecting plate 4, they are also thermally connected to the temperature-averaging plate 1. The temperature-averaging plate 1 forms a surface contact with the heating element to achieve a thermal connection. The heat of the heating element is transferred to the fins 2 for heat dissipation through the conduction of the temperature-averaging plate 1. When the heat dissipation device is used in a field environment, airflow passes through the space between adjacent fins 2, achieving an excellent heat dissipation effect.

[0052] In an optional embodiment, there is only one connecting plate 4, and all fins 2 are connected to the same connecting plate 4, such as Figure 3 As shown; In this way, all fins 2 are connected to the same connecting plate 4, which has a strong limiting effect on the spacing between two adjacent fins 2;

[0053] Alternatively, multiple connecting plates 4 may be provided, with a single connecting plate 4 connecting any two adjacent fins 2. In this manner, the connecting plate 4 can be designed as a small plate member, serving only to connect any two adjacent fins 2. The fins 2 are connected in pairs, thereby integrating all fins 2 and saving material costs. This facilitates the actual production and assembly of heat dissipation devices, and the above-described feasible approach can be adopted according to actual needs.

[0054] In an optional embodiment, the heat absorbing side 211 of the body 21 is connected to the connecting plate 4, and in the extension direction of the heat absorbing side 211, the body 21 is completely located in the connecting plate 4, that is, in the orthographic projection in the thickness direction of the connecting plate 4, all the fins 2 are completely located on the connecting plate 4, please refer to Figure 3 .

[0055] With such arrangement, the connecting plate 4 plays a dual role in integrating and reinforcing the plurality of fins 2 and also serves as a heat-conducting substrate to form surface contact with the heating element to achieve heat-conducting connection.

[0056] In another optional embodiment, on the side of the body 21 connected to the connecting plate 4, the body 21 exceeds the edge of the connecting plate 4, or the connecting plate 4 is in the shape of a strip, and the length of the fin 2 is much larger than the width of the connecting plate 4. Please refer to Figure 4 .

[0057] Such a setting is suitable for the case where the heat dissipation device is also provided with a temperature equalizing plate 1. The connecting plate 4 is connected to the other sides of the fin 2 except the heat-absorbing side 211, which plays a role in assisting in positioning the position of the fin 2 and stabilizing the fin 2. Moreover, since the connecting plate 4 is only connected to a local position of the side of the fin 2, after all the fins 2 are integrated, there will be no blocking effect, and it will not affect the airflow passing through the fins 2.

[0058] In a specific embodiment, the connecting plate 4 is provided with an assembly groove 41, and the fin 2 is inserted into the assembly groove 41, and the fin 2 and the assembly groove 41 are interference-fitted. The assembly groove 41 can be formed by forging or milling by a CNC machine; in this way, the contact area between the fin 2 and the connecting plate 4 is large, and the connection relationship is more stable and reliable.

[0059] Alternatively, the fins 2 are welded to the surface of the connecting plate 4 by laser welding; in this way, the processing method is simpler and the processing cost is low.

[0060] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0061] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0062] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0063] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0064] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly illustrate the technical solutions and cannot be used to limit the scope of protection of the present application.

[0065] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A fin, characterized in that: include: Ontology(21); A pulsating heat pipe (22) is provided on the body (21); the pulsating heat pipe (22) is formed in the body (21) or the pulsating heat pipe (22) is connected to the surface of the body (21); Wherein, in a direction perpendicular to the extension surface of the body (21), the orthographic projection of the pulsating heat pipe (22) is completely located on the body (21).

2. The fin according to claim 1, characterized in that The pulsating heat pipe (22) comprises a straight section (221) and a curved section (222); the curved section (222) is at least distributed at a position close to the heat absorbing side (211) of the body (21); and the straight section (221) is arranged away from the heat absorbing side (211).

3. The fin according to claim 1, characterized in that A plurality of the pulsating heat pipes (22) are arranged on the body (21), and all the pulsating heat pipes (22) are arranged independently of each other.

4. The fin according to claim 1, wherein: The pulsating heat pipe (22) comprises a main body section and a variable diameter section, and the flow area of the variable diameter section is different from the flow area of the main body section.

5. The fin according to claim 1, wherein: The body (21) is a blown plate, and the pulsating heat pipe (22) is a sealed channel formed in the body (21); Alternatively, the body (21) comprises split plates welded on two sides, and at least one side of the split plates is a milled part or a stamped part provided with a groove, and the groove is sealed to form the pulsating heat pipe (22); Alternatively, the body (21) is a plate, and the pulsating heat pipe (22) is a coil and is welded to the surface of the plate.

6. A heat dissipation device, characterized in that: It comprises a connecting plate (4) and a fin (2) according to any one of claims 1 to 5, wherein a plurality of the fins (2) are arranged side by side, and the connecting plate (4) is a solid metal plate and is used to connect the plurality of the fins (2).

7. The heat dissipation device according to claim 6, characterized in that: All the fins (2) are connected to the same connecting plate (4); Alternatively, a plurality of the connecting plates (4) are provided, and a single connecting plate (4) connects any two adjacent fins (2).

8. The heat dissipation device according to claim 6, characterized in that: The heat-absorbing side (211) of the body (21) is connected to the connecting plate (4), and in the extension direction of the heat-absorbing side (211), the body (21) is completely located in the connecting plate (4).

9. The heat dissipation device according to claim 6, wherein: On the side of the body (21) connected to the connecting plate (4), the body (21) extends beyond the edge of the connecting plate (4).

10. The heat dissipation device according to claim 6, characterized in that: The connecting plate (4) is provided with an assembly groove (41), and the fin (2) is inserted into the assembly groove (41); Alternatively, the fins (2) are welded to the surface of the connecting plate (4).

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