Heat pipe structure and heat sink

Abstract

This invention discloses a heat pipe structure and a radiator. The heat pipe structure includes an outer tube, an inner tube, and a wick. The outer tube has an evaporation end and a condensation end. The inner tube is inserted inside the outer tube, and a heat transfer medium flows through the inner tube. A vacuum cavity is formed between the inner and outer tubes, and the vacuum cavity is filled with a phase change working medium. The phase change working medium absorbs heat at the evaporation end and transforms into a gas, and releases heat at the condensation end and transforms into a liquid. The wick is located in the vacuum cavity and drives the liquid phase change working medium to flow back from the condensation end to the evaporation end. This invention avoids temperatures exceeding the heat transfer limit of the phase change working medium, prevents heat transfer failure of the heat pipe structure, and ensures the heat transfer performance and efficiency of the heat pipe structure.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation technology, and in particular to a heat pipe structure and a heat sink. Background Technology

[0002] Electronic components such as chips generate a significant amount of heat during operation. To effectively dissipate this excess heat, heat pipes are used in related technologies to dissipate the heat generated by these components, achieving effective cooling.

[0003] However, during use, when the temperature is too high and exceeds the heat transfer limit of the heat pipe, it is easy to cause the heat pipe to fail. Summary of the Invention

[0004] The main objective of this invention is to propose a heat pipe structure that aims to avoid heat pipe heat transfer failure and ensure heat transfer efficiency.

[0005] To achieve the above objectives, the heat pipe structure proposed in this invention includes:

[0006] The outer tube has an evaporation end and a condensation end;

[0007] An inner tube is inserted inside the outer tube, and a heat transfer medium flows through the inner tube. A vacuum cavity is formed between the inner tube and the outer tube, and the vacuum cavity is filled with a phase change working medium. The phase change working medium absorbs heat at the evaporation end and transforms into a gas, and releases heat at the condensation end and transforms into a liquid.

[0008] A liquid suction core, located inside the vacuum chamber, is used to drive the liquid phase change working medium to flow back from the condensation end to the evaporation end.

[0009] In one embodiment, the inner tube extends from the evaporation end and the condensation end at its two axial ends, respectively. The inner tube is provided with an inlet end for introducing the heat transfer medium and an outlet end for discharging the heat transfer medium at its two axial ends, respectively. The inlet end is located near the evaporation end, and the outlet end is located near the condensation end.

[0010] In one embodiment, the axial ends of the outer tube are recessed toward the outer peripheral wall of the inner tube and welded to the inner tube for sealing.

[0011] In one embodiment, the number of the suction cores is at least two, and the at least two suction cores are distributed circumferentially around the inner tube.

[0012] In one embodiment, the vacuum chamber is provided with at least two vapor channels through which the gaseous phase change working medium flows from the evaporation end to the condensation end, and the at least two vapor channels are circumferentially spaced around the inner tube.

[0013] In one embodiment, a vapor channel is provided between each pair of adjacent absorbent cores.

[0014] In one embodiment, the outer tube is provided with a plurality of heat dissipation fins.

[0015] In one embodiment, the heat transfer medium is a heat transfer gas, and a section of the inner tube near the outlet end is bent so that the outlet end is oriented toward the heat dissipation fins.

[0016] In one embodiment, the heat transfer medium is air, water, or liquid metal;

[0017] And / or, the inner tube is a copper tube, an aluminum tube, or a silver tube;

[0018] And / or, the outer tube is a copper tube, an aluminum tube, or a silver tube;

[0019] And / or, the absorbent core has a capillary structure.

[0020] To achieve the above objectives, the present invention also provides a heat sink, including the heat pipe structure described above.

[0021] In one embodiment, a drive member connected to the inner tube is further included, the drive member being used to drive the heat transfer medium to flow from the inlet end of the inner tube to the outlet end of the inner tube.

[0022] In one embodiment, the heat sink further includes a cooling fan disposed on one side of the heat pipe structure.

[0023] In the heat pipe structure of this invention, the outer tube has an evaporation end and a condensation end, and an inner tube is inserted inside the outer tube, forming a vacuum cavity between the inner and outer tubes. This vacuum cavity is filled with a phase change working medium. The phase change working medium absorbs heat at the evaporation end and transforms into a gas, and releases heat at the condensation end and transforms into a liquid. Simultaneously, a wick is installed within the vacuum cavity to drive the liquid phase change medium back to the evaporation end, thereby achieving phase change circulation of the phase change working medium within the vacuum cavity and realizing heat transfer and heat dissipation functions. By circulating a heat transfer medium within the inner tube, this medium can absorb and carry away the heat between the inner and outer tubes, thus preventing the temperature from exceeding the heat transfer limit of the phase change working medium, preventing heat transfer failure of the heat pipe structure, and ensuring the heat transfer performance and efficiency of the heat pipe structure. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a structure of a heat pipe according to an embodiment of the present invention;

[0026] Figure 2 for Figure 1 Sectional view at point AA;

[0027] Figure 3 This is a schematic diagram of the structure of an embodiment of the heat sink of the present invention;

[0028] Figure 4 for Figure 3 The schematic diagram of the heat pipe structure in the embodiment is shown.

[0029] Explanation of icon numbers:

[0030]

[0031] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0034] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0035] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0036] This invention proposes a heat pipe structure that aims to achieve the function of a heat pipe by setting up two layers of pipes, an inner and an outer pipe, forming a vacuum cavity between the inner and outer pipes for the flow of the phase change working medium. At the same time, the heat transfer medium flows in the inner pipe. When the temperature is too high, the heat is carried away by the heat transfer medium flowing in the inner pipe, preventing the phase change working medium between the inner and outer pipes from failing to transfer heat, thus ensuring the heat transfer performance of the heat pipe structure.

[0037] In embodiments of the present invention, such as Figures 1 to 4 As shown, the heat pipe structure includes an outer tube 1, an inner tube 2, and a liquid wick 3.

[0038] The outer tube 1 has an evaporation end 101 and a condensation end 102; the inner tube 2 is inserted inside the outer tube 1, and a heat transfer medium flows through the inner tube 2; a vacuum cavity is formed between the inner tube 2 and the outer tube 1, and the vacuum cavity is filled with a phase change working medium, which is used to absorb heat at the evaporation end 101 and change into a gas, and to release heat at the condensation end 102 and change into a liquid; the liquid wick 3 is located in the vacuum cavity and is used to drive the liquid phase change working medium to flow back from the condensation end 102 to the evaporation end 101.

[0039] The outer tube 1 is fitted over the inner tube 2, and the outer tube 1 and the inner tube 2 form a vacuum cavity. Since the boiling point decreases in a vacuum environment, the vacuum cavity is filled with a phase change working medium. When the evaporation end 101 of the heat pipe structure approaches the heat source 8, the phase change working medium can absorb external heat at the evaporation end 101 of the outer tube 1 and change into a gas. Then, it moves to the condensation end 102 of the heat pipe structure to condense and release heat, thereby achieving the function of heat transfer and heat dissipation for the heat source 8. At the same time, a liquid wick 3 is provided in the vacuum cavity. This liquid wick 3 can drive the condensed liquid phase change working medium to flow back from the condensation end 102 to the evaporation end 101 for the next phase change heat absorption and heat transfer. In this way, the phase change working medium is circulated in the heat pipe structure, realizing the function of heat dissipation and cooling for the heat source 8, such as an electronic heating element. When the temperature of heat source 8 is too high, the heat transfer function of the phase change working medium may fail. In this embodiment, the heat transfer medium flows in the inner tube 2, and the flowing heat transfer medium directly absorbs and carries away the heat between the inner tube 2 and the outer tube 1, so as to avoid the temperature from being too high and exceeding the heat transfer limit of the phase change working medium, and to ensure the heat transfer performance and structural reliability of the heat pipe structure.

[0040] Understandably, heat transfer between the outer tube 1 and the inner tube 2 is achieved through the phase change cycle of the phase change working medium, i.e., latent heat conduction (phase change occurs) is formed between the outer tube 1 and the inner tube 2. Within the inner tube 2, the flow of the heat transfer medium directly absorbs and carries away the heat between the inner tube 2 and the outer tube 1, forming sensible heat conduction (no phase change occurs). The heat pipe structure in this embodiment includes both latent heat conduction and sensible heat conduction. Therefore, in practical applications, latent heat conduction can work alone, sensible heat conduction can work alone, or both can work simultaneously.

[0041] As an example, when the temperature of the heat source 8 is not too high, latent heat conduction can operate alone. In this case, the heat transfer medium inside the inner tube 2 can remain stationary. Only the evaporation end 101 of the outer tube 1 needs to be brought close to the heat source 8; no additional power is required to drive the heat transfer medium to circulate within the inner tube 2, thus reducing energy consumption. Furthermore, when the driving component 6 in sensible heat conduction fails, latent heat conduction can operate independently, ensuring the heat transfer performance of the heat pipe structure and allowing the radiator to continue operating. As an example, when the temperature of the heat source 8 is too high, latent heat conduction and sensible heat conduction can operate simultaneously. In this case, the heat from the heat source 8 can be conducted not only by the phase change working medium but also carried away by the heat transfer medium inside the inner tube 2. In this embodiment, the circulation of the heat transfer medium inside the inner tube 2 reduces the risk of latent heat conduction failure. As an example, when latent heat conduction fails, sensible heat conduction operates alone, ensuring the heat transfer performance of the heat pipe structure, allowing the radiator to continue operating, and guaranteeing the heat dissipation and cooling performance of the heat source 8.

[0042] Therefore, this embodiment can select different heat conduction modes of the heat pipe structure according to the actual situation, realizing the diversity of heat pipe structure use and having better heat transfer stability.

[0043] In practical applications, the heat transfer medium flowing inside the inner tube 2 can be forced to flow, such as by using a drive component 6 connected to the inner tube 2 to drive the heat transfer medium in and out of the inner tube 2. Alternatively, the heat transfer medium flowing inside the inner tube 2 can be non-forced to flow. For example, when the inner tube 2 is arranged vertically, the heat transfer medium can flow inside the inner tube 2 under its own gravity, without the need for an additional drive component 6. In this embodiment, considering ease of control, the heat transfer medium is forced to flow into and out of the inner tube 2 using the drive component 6. In this case, the heat pipe structure is not limited by the structural installation direction or layout direction, and the flow rate and velocity of the heat transfer medium are easy to control, ensuring better heat dissipation performance.

[0044] Alternatively, the heat transfer medium can be air, water, or liquid metal, which have good thermal conductivity.

[0045] Alternatively, the inner tube 2 can be made of materials with good thermal conductivity, such as copper, aluminum, or silver.

[0046] Optionally, the outer tube 1 can be made of materials with good thermal conductivity, such as copper, aluminum, or silver.

[0047] Optionally, the liquid-absorbing core 3 has a capillary structure, such as sintered copper powder, or a material that facilitates capillary action, such as wire mesh.

[0048] Alternatively, the phase change working medium can be a conventional phase change medium such as distilled water.

[0049] In the heat pipe structure of this invention, the outer tube 1 has an evaporation end 101 and a condensation end 102. An inner tube 2 is inserted inside the outer tube 1, forming a vacuum cavity between the inner tube 2 and the outer tube 1. A phase change working medium is filled in the vacuum cavity. This working medium absorbs heat at the evaporation end 101 and transforms into a gas, and releases heat at the condensation end 102 and transforms into a liquid. Simultaneously, a wick 3 is installed in the vacuum cavity to drive the liquid phase change medium back to the evaporation end 101, thereby achieving phase change circulation of the working medium within the vacuum cavity and realizing heat transfer and heat dissipation functions. By circulating a heat transfer medium within the inner tube 2, this medium can absorb and carry away the heat between the inner tube 2 and the outer tube 1, thus preventing the temperature from exceeding the heat transfer limit of the phase change working medium, preventing heat transfer failure of the heat pipe structure, and ensuring the heat transfer performance and efficiency of the heat pipe structure.

[0050] In one embodiment of the present invention, please refer to Figure 1 and Figure 4The inner tube 2 extends from the evaporation end 101 and the condensation end 102 at its two axial ends, respectively. The inner tube 2 is provided with an inlet end 201 for introducing the heat transfer medium and an outlet end 202 for flowing out the heat transfer medium at its two axial ends, respectively. The inlet end 201 is located near the evaporation end 101, and the outlet end 202 is located near the condensation end 102.

[0051] Understandably, a heat transfer medium flows inside the inner tube 2. By extending the axial ends of the inner tube 2 from the evaporation end 101 and the condensation end 102 respectively, the inlet end 201 and the outlet end 202 of the inner tube 2 are both outside the outer tube 1, so as to facilitate the introduction of heat transfer medium into the inner tube 2, and also to facilitate the reception of heat transfer medium flowing out from the outlet end 202.

[0052] The heat transfer medium enters the inner tube 2 from the inlet end 201 and flows out of the inner tube 2 from the outlet end 202. Since the evaporator end 101 is usually located close to the heat source 8, by placing the inlet end 201 close to the evaporator end 101, the heat transfer medium can absorb heat from the heat source 8 more quickly, preventing the heat source 8 from becoming too hot and causing latent heat conduction failure, thus further ensuring the heat transfer reliability of the heat pipe structure. Placing the outlet end 202 close to the condenser end 102 allows the heat transfer medium in the inner tube 2 to flow axially from the evaporator end 101 to the condenser end 102 before flowing out, extending the flow path of the heat transfer medium in the inner tube 2, increasing the heat absorption length and heat absorption time, and achieving a better heat dissipation effect.

[0053] As an example, the inner tube 2 extends in the same direction as the outer tube 1. The heat transfer medium in the inner tube 2 flows in the direction from the evaporation end 101 to the condensation end 102, which is consistent with the flow direction of the gaseous phase change working medium after heat absorption. This can prevent heat from flowing back to the evaporation end 101 and affecting the heat absorption effect on the heat source 8.

[0054] In practical applications, the outer tube 1 and the inner tube 2 can be straight or bent, and their specific structural shapes can be determined according to the actual situation, without any restrictions.

[0055] In one embodiment of the present invention, please refer to Figure 1 and Figure 4 The axial ends of the outer tube 1 are recessed towards the outer peripheral wall of the inner tube 2 and welded to the inner tube 2 for sealing.

[0056] In this embodiment, the inner tube 2 passes through the outer tube 1 along the axial direction, and the inner tube 2 and the outer tube 1 are spaced apart in the radial direction. The two ends of the inner tube 2 extend from the two ends of the outer tube 1 respectively. By shrinking the two ends of the outer tube 1 inward toward the outer peripheral wall of the inner tube 2 and welding and sealing them with the outer peripheral wall of the inner tube 2, the structural strength of the outer tube 1 and the inner tube 2 is ensured while ensuring the sealing reliability of the vacuum cavity.

[0057] In one embodiment of the present invention, please refer to Figure 1and Figure 2 The inner tube 2 and outer tube 1 can be coaxial or non-coaxial, as long as the heat transfer medium flows through the inner tube 2. As an example, the inner tube 2 and outer tube 1 are coaxially arranged, and the vacuum cavity has a ring-shaped structure. The coaxial arrangement of the inner tube 2 and outer tube 1 allows the vacuum cavity to uniformly surround the periphery of the inner tube 2, enabling the heat transfer medium within the inner tube 2 to conduct heat evenly to the periphery, thus resulting in a more uniform temperature within the vacuum cavity. Furthermore, by arranging the inner tube 2 and outer tube 1 coaxially, the manufacturing process can be simplified, and production efficiency improved.

[0058] In one embodiment of the present invention, please refer to Figure 2 The number of suction cores 3 is at least two, and at least two suction cores 3 are distributed circumferentially around the inner tube 2.

[0059] In this embodiment, the wick 3 serves to reflux the liquid phase change working medium from the condenser end 102 to the evaporator end 101. The vacuum chamber has a ring-shaped structure around the inner tube 2. By setting at least two wicks 3 in the vacuum chamber, which are spaced apart circumferentially around the inner tube 2, the liquid phase change working medium from the condenser end 102 can flow uniformly to the evaporator end 101, preventing uneven circumferential distribution of the phase change working medium from affecting heat transfer performance. Furthermore, by setting at least two wicks 3, the reflux of the liquid phase change working medium can be streamlined, reducing flow resistance and ensuring flow stability.

[0060] Optionally, the number of absorbent cores 3 can be determined according to the actual situation, such as two, three, four or five, etc., and the specific number is not limited.

[0061] The absorbent core 3 can be disposed on the inner wall of the outer tube 1, on the outer wall of the inner tube 2, or connected to both the inner wall of the outer tube 1 and the outer wall of the inner tube 2. As an example, the absorbent core 3 is connected to both the inner wall of the outer tube 1 and the outer wall of the inner tube 2 in the radial direction, which ensures structural strength while increasing the absorbent area and improving the absorbent effect.

[0062] In one embodiment, please refer to Figure 2 The vacuum chamber is provided with at least two vapor channels 4 through which the gaseous phase change working medium flows from the evaporation end 101 to the condensation end 102. The at least two vapor channels 4 are distributed circumferentially around the inner tube 2.

[0063] After absorbing heat and evaporating into a gas at the evaporation end 101, the phase change working medium flows to the condensation end 102 through the vapor channel 4, where it releases heat and condenses into a liquid. The vapor channels 4 are arranged axially along the heat pipe structure, with at least two vapor channels 4 spaced circumferentially around the inner pipe 2. This ensures that the gas at the evaporation end 101 can pass uniformly through the at least two vapor channels 4, guaranteeing circumferential heat transfer uniformity. Furthermore, the gas at the evaporation end 101 can be channeled through the at least two vapor channels 4, ensuring flow stability.

[0064] Optionally, the number of steam passages 4 can be determined according to the actual situation, such as two, three, four or five, etc., and the specific number is not limited.

[0065] Further, please refer to Figure 2 A vapor channel 4 is formed between every two adjacent wicking cores 3. The vapor channel 4 is a passage for the gaseous phase change medium. Two adjacent wicking cores 3, along with the inner tube 2 and outer tube 1, enclose a vapor channel 4. The fluids within the wicking cores 3 and the vapor channel 4 do not interfere with each other and will not affect heat transfer. In this embodiment, the wicking cores 3 and the vapor channel 4 are staggered in the circumferential direction. This allows the gaseous phase change working medium to flow uniformly from the vapor channel 4 to the condensing end 102, and the liquid phase change working medium to flow uniformly from the wicking cores 3 to the evaporating end 101. This further ensures the uniformity of the phase change working medium distribution in the circumferential direction, prevents uneven distribution from affecting the heat pipe structure, and improves structural stability and impact resistance.

[0066] In one embodiment of the present invention, please refer to Figure 3 The outer tube 1 is provided with several heat dissipation fins 5.

[0067] By installing heat dissipation fins 5 on the outside of the outer tube 1, the heat dissipation area is increased, and the heat dissipation efficiency is improved. Optionally, a number of heat dissipation fins 5 are distributed at intervals along the axial direction.

[0068] In one embodiment of the present invention, the heat transfer medium is a heat transfer gas, and a section of the inner tube 2 near the outlet end 202 is bent so that the outlet end 202 is oriented toward the heat dissipation fins 5.

[0069] When the heat transfer medium is a heat transfer gas, the section of the heat pipe structure near the outlet end 202 of the inner pipe 2 can be bent so that the outlet end 202 of the inner pipe 2 faces the heat dissipation fins 5. This allows the heat transfer gas to blow directly from the outlet end 202 onto the heat dissipation fins 5, accelerating gas flow and further improving heat dissipation efficiency. In this configuration, only the driving component 6 needs to be installed at the inlet end 201 or the outlet end 202 of the inner pipe 2; no additional piping or other structures are needed to collect the heat transfer medium flowing out from the outlet end 202, resulting in a simpler overall structure. Optionally, the heat transfer gas can be air, and the driving component 6 can be a fan or air pump, etc.

[0070] Furthermore, an air guide hood can be installed at the outlet end 202. The air guide hood can be a horn structure to increase the air outlet area.

[0071] In other embodiments where the heat transfer medium is a heat transfer liquid, both the inlet end 201 and the outlet end 202 of the inner tube 2 can be connected to the drive unit 6 to form a closed-loop structure. Alternatively, a housing can be provided to collect the heat transfer liquid flowing out from the outlet end 202. Optionally, the heat transfer liquid can be water or liquid metal, and the drive unit 6 can be a liquid pump.

[0072] The present invention also proposes a heat sink; please refer to [link / reference]. Figure 3 The heat sink includes a heat pipe structure, the specific structure of which is described in the above embodiments. Since this heat sink employs all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. It is understood that this heat sink can be applied to any application requiring heat dissipation, such as for cooling heat-generating components like chips and power modules in electronic devices.

[0073] In one embodiment of the present invention, the radiator further includes a driving component 6 connected to the inner tube 2. The driving component 6 is used to drive the heat transfer medium to flow from the inlet end 201 to the outlet end 202. The driving component 6 provides power for the flow of the heat transfer medium and can be a fan, air pump, liquid pump, etc. The driving component 6 can be connected to the inlet end 201, the outlet end 202, or both.

[0074] As an example, the driving component 6 is a driving pump, with its inlet end connected to the outlet end 202 of the inner tube 2 and its outlet end connected to the inlet end 201 of the inner tube 2. This configuration creates a closed-loop structure for the heat transfer medium between the driving component 6 and the inner tube 2, allowing the heat transfer medium to flow through the inner tube 2 and achieving heat transfer and dissipation.

[0075] To further improve heat dissipation efficiency, the radiator also includes a cooling fan 7 located on one side of the heat pipe structure.

[0076] In this embodiment, a cooling fan 7 is added to the heat pipe structure for heat dissipation, further improving heat dissipation efficiency. In practical applications, the cooling fan 7 can blow air towards the heat pipe structure to accelerate airflow. As an example, the heat pipe structure can be bent into a roughly circular shape, with the cooling fan 7 positioned within the circle formed by the heat pipe structure. This increases the contact area between the airflow and the heat pipe structure, thereby improving heat dissipation efficiency. Furthermore, this arrangement results in a more compact structural layout and a smaller overall footprint.

[0077] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A heat pipe structure, characterized in that, include: The outer tube has an evaporation end and a condensation end; An inner tube is inserted inside the outer tube, and a heat transfer medium flows through the inner tube; a vacuum cavity is formed between the inner tube and the outer tube, and the vacuum cavity is filled with a phase change working medium, which is used to absorb heat at the evaporation end and change into a gas, and to release heat at the condensation end and change into a liquid. as well as A liquid suction core, located inside the vacuum chamber, is used to drive the liquid phase change working medium to flow back from the condensation end to the evaporation end; The outer tube is provided with several heat dissipation fins, the heat transfer medium is a heat transfer gas, and a section of the inner tube near the outlet end is bent so that the outlet end is oriented toward the heat dissipation fins.

2. The heat pipe structure as described in claim 1, characterized in that, The inner tube extends from the evaporation end and the condensation end at its two axial ends, respectively. The two axial ends of the inner tube are respectively provided with an inlet end for introducing the heat transfer medium and an outlet end for flowing out of the heat transfer medium. The inlet end is located near the evaporation end, and the outlet end is located near the condensation end.

3. The heat pipe structure as described in claim 2, characterized in that, The axial ends of the outer tube are recessed towards the outer peripheral wall of the inner tube and are welded and sealed with the inner tube.

4. The heat pipe structure as described in claim 1, characterized in that, The number of the suction cores is at least two, and the at least two suction cores are distributed circumferentially around the inner tube.

5. The heat pipe structure as described in claim 4, characterized in that, The vacuum chamber is provided with at least two vapor channels through which the gaseous phase change working medium flows from the evaporation end to the condensation end, and the at least two vapor channels are distributed circumferentially around the inner tube.

6. The heat pipe structure as described in claim 5, characterized in that, There is a vapor channel between each pair of adjacent absorbent cores.

7. The heat pipe structure according to any one of claims 1 to 6, characterized in that, The heat transfer medium is air; And / or, the inner tube is a copper tube, an aluminum tube, or a silver tube; And / or, the outer tube is a copper tube, an aluminum tube, or a silver tube; And / or, the absorbent core has a capillary structure.

8. A radiator, characterized in that, Includes the heat pipe structure as described in any one of claims 1 to 7.

9. The radiator as described in claim 8, characterized in that, It also includes a drive unit connected to the inner tube, the drive unit being used to drive the heat transfer medium to flow from the inlet end of the inner tube to the outlet end of the inner tube.

10. The radiator as claimed in claim 8, characterized in that, The radiator also includes a cooling fan located on one side of the heat pipe structure.

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