Heat pipe and heat dissipation device

Abstract

The embodiment of the present invention provides a heat pipe and a heat dissipation device, including a first evaporation section, an intermediate section and a first condensation section arranged in sequence along the length direction of the heat pipe, the intermediate section including a liquid working medium flow channel and a gaseous working medium flow channel that block each other, and the gaseous working medium flow channel is located above the liquid working medium flow channel; the first evaporation section includes an evaporation space, the evaporation space is connected to the gaseous working medium flow channel, a gas-liquid partition is provided at the first end of the liquid working medium flow channel near the evaporation space, the first end of the liquid working medium flow channel includes a connecting space located below the gas-liquid partition, the connecting space is used to connect the liquid working medium flow channel with the evaporation space, and the first condensation section includes a condensation space, the upper and lower parts of the condensation space are respectively connected to the gaseous working medium flow channel and the liquid working medium flow channel. In the heat pipe provided by the embodiment of the present invention, the liquid working medium and the gaseous working medium can flow separately in two independent and mutually non-interfering flow channels, thereby improving the heat transfer effect of the heat pipe.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pipes, and in particular to heat pipes and heat dissipation devices. Background Art

[0002] Heat pipe radiators are used for heat dissipation of various industrial electrical equipment and electronic equipment. Heat pipe radiators include heat pipes as heat transfer components.

[0003] In the prior art, a heat pipe includes a tube shell, an end cover and a liquid wick made of a capillary porous material. When one end of the heat pipe is heated, the liquid in the liquid wick evaporates and vaporizes. The vapor flows to the other end under a small saturated pressure difference, releases heat and condenses into liquid. The liquid then flows back to the evaporation section along the porous material by capillary force.

[0004] However, when the heat pipe is faced with high heat flux density, the reflux flow direction of the liquid working medium in the capillary structure is opposite to the steam flow. The rapid steam flow will hinder the reflux of the liquid working medium, resulting in insufficient liquid supply in the heat pipe, thereby affecting the heat transfer effect. Summary of the invention

[0005] The purpose of the embodiment of the present invention is to provide a heat pipe to solve the technical problem in the prior art that the rapid flow of steam in the heat pipe will hinder the reflux of the liquid working medium, thereby affecting the heat transfer effect. The specific technical solution is as follows:

[0006] In a first aspect, an embodiment of the present invention provides a heat pipe, the heat pipe having a length direction, the heat pipe comprising a first evaporation section, a middle section and a first condensation section sequentially arranged along the length direction of the heat pipe, the middle section comprising a liquid working medium flow channel and a gaseous working medium flow channel which are blocked from each other, the gaseous working medium flow channel being located above the liquid working medium flow channel;

[0007] The first evaporation section includes an evaporation space, which is connected to the gaseous working medium flow channel. A gas-liquid partition is provided at the first end of the liquid working medium flow channel near the evaporation space. The first end of the liquid working medium flow channel includes a connecting space located below the gas-liquid partition, and the connecting space is used to connect the liquid working medium flow channel with the evaporation space. The first condensation section includes a condensation space, and the upper and lower parts of the condensation space are respectively connected to the gaseous working medium flow channel and the liquid working medium flow channel.

[0008] Optionally, the heat pipe includes a main tube portion, the main tube portion includes a first cavity located in the middle section, and the main tube portion also includes a baffle plate, which is used to separate the first cavity into the liquid working fluid flow channel and the gaseous working fluid flow channel.

[0009] Optionally, a plurality of first baffles are arranged on the baffle plate, the first baffles are perpendicular to the baffle plate, and the plurality of first baffles are used to separate the gaseous working medium flow channel into a plurality of first flow channels;

[0010] And / or, a plurality of second partitions are arranged on the baffle plate, the second partitions are perpendicular to the baffle plate, and the plurality of second partitions are used to separate the liquid working medium flow channel into a plurality of second flow channels.

[0011] Optionally, the gas-liquid partition is perpendicular to the barrier plate, the gas-liquid partition is welded to a plurality of the second barrier plates, and the upper surface of the gas-liquid partition is in contact with the lower surface of the barrier plate;

[0012] The difference between the height of the second partition plate and the height of the gas-liquid partition plate is greater than or equal to 1 mm and less than or equal to 2 mm.

[0013] Optionally, the cross-section of the first cavity is rectangular, the main tube portion has a height direction and a width direction, the main tube portion includes a top plate and a bottom plate relatively arranged along the height direction of the main tube portion, and the bottom plate is provided with a plurality of first fins spaced apart along the width direction of the main tube portion, and the plurality of first fins are located in the evaporation space.

[0014] Optionally, a plurality of second fins spaced apart along a width direction of the main tube portion are provided on the top plate, and the plurality of second fins are located in the condensation space.

[0015] Optionally, a mounting portion is provided on the outer wall of the main tube portion, and the mounting portion is located at the first condensation section and one end of the middle section close to the first condensation section. A plurality of mounting groove groups are arranged on the mounting portion at intervals along the length direction of the heat pipe, and the mounting groove groups include a first mounting groove and a second mounting groove relatively arranged along the height direction of the main tube portion, and the mounting groove group is used to install a capillary heat pipe.

[0016] In a second aspect, an embodiment of the present invention provides a heat dissipation device, comprising any one of the above-mentioned heat pipes.

[0017] Optionally, it also includes a plurality of capillary heat pipes, which are arranged on the outer wall of the heat pipe at intervals along the length direction of the heat pipe, and the capillary heat pipe includes a second evaporation section, an insulation section and a second condensation section. The second evaporation section of the plurality of capillary heat pipes is located at the first condensation section and one end of the middle section close to the first condensation section.

[0018] Optionally, the capillary heat pipe is a U-shaped capillary heat pipe, the plurality of capillary heat pipes include a plurality of first capillary heat pipes and a plurality of second capillary heat pipes, and the direction of the second condensation section of the first capillary heat pipe is opposite to the direction of the second condensation section of the second capillary heat pipe;

[0019] A plurality of first heat sinks are arranged at intervals on the plurality of first capillary heat pipes along the length direction of the first capillary heat pipes, and a plurality of second heat sinks are arranged at intervals on the plurality of second capillary heat pipes along the length direction of the second capillary heat pipes.

[0020] In the heat pipe provided by the embodiment of the present invention, the liquid working medium flow channel and the gaseous working medium flow channel are mutually isolated, so that the liquid working medium and the gaseous working medium can flow separately in two independent flow channels that do not affect each other, that is, the flow of the gaseous working medium will not hinder the reflux of the liquid working medium, which is conducive to the rapid flow of the liquid working medium and the gaseous working medium, and improves the heat transfer effect of the heat pipe; in addition, by setting the gas-liquid partition, it is possible to prevent the gaseous working medium in the evaporation space from flowing to the liquid working medium flow channel, so as to ensure that the gaseous working medium in the evaporation space can flow to the condensation space through the gaseous working medium flow channel, that is, it is ensured that the flow of the liquid working medium and the flow of the gaseous working medium do not affect each other; in addition, the heat pipe provided by the embodiment of the present invention does not need to adopt a capillary structure, has a simple structure, and is easy to process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0022] Figure 1 is a schematic diagram of the structure of a current heat pipe;

[0023] Figure 2 A schematic diagram of the three-dimensional structure of a heat pipe provided in an embodiment of the present invention;

[0024] Figure 3 A schematic cross-sectional view of a heat pipe provided in an embodiment of the present invention;

[0025] Figure 4 A schematic diagram of the flow direction of gaseous working medium and liquid working medium in a heat pipe provided in an embodiment of the present invention;

[0026] Figure 5 Schematic diagram of the internal structure of the main pipe part of the heat pipe provided in the embodiment of the present invention Figure 1 ;

[0027] Figure 6 Schematic diagram of the internal structure of the main pipe part of the heat pipe provided in the embodiment of the present invention Figure 2 ;

[0028] Figure 7 It is a schematic diagram of the side view structure of the main pipe part of the heat pipe provided in an embodiment of the present invention;

[0029] Figure 8 for Figure 7 A schematic cross-sectional view along the AA direction in FIG.

[0030] Fig. 9 for Figure 7 A cross-sectional schematic diagram along the BB direction;

[0031] Fig.10 for Figure 7 A cross-sectional schematic diagram along the CC direction;

[0032] Fig.11 A schematic diagram of the structure of a heat dissipation device provided in an embodiment of the present invention;

[0033] Fig.12 It is a schematic structural diagram of another heat dissipation device provided in an embodiment of the present invention.

[0034] Reference numerals:

[0035] 11-first evaporation section, 12-middle section, 13-first condensation section, 14-liquid working medium flow channel, 15-gaseous working medium flow channel, 16-evaporation space, 17-condensation space, 18-connecting space, 20-main tube portion, 21-blocking plate, 22-first baffle, 23-second baffle, 24-bottom plate, 25-first fin, 26-second fin, 27-third fin, 28-installation groove group, 29-third baffle, 30-gas-liquid baffle, 40-end cover, 50-capillary heat pipe, 51-first capillary heat pipe, 52-second capillary heat pipe, 60-first heat sink, 70-second heat sink, 80-connecting plate, 111-contact portion. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0037] The embodiments of the present invention are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0038] In the prior art, reference Figure 1The heat pipe includes a tube shell, an end cover and a liquid wick made of a capillary porous material. When filling the working liquid in the heat pipe, it is necessary to pump the heat pipe into a negative pressure and then fill it with an appropriate amount of working liquid, so that the capillary porous material of the liquid wick close to the inner wall of the tube is filled with liquid and then sealed. One end of the heat pipe is the evaporation section (heating section), and the other end is the condensation section (cooling section). An insulation section can be arranged between the two sections according to application needs. When the evaporation section of the heat pipe is heated, the liquid in the liquid wick evaporates and vaporizes. The steam flows to the condensation section under a small saturated pressure difference, releases heat and condenses into liquid. The liquid then flows back to the evaporation section along the porous material by the action of capillary force. This cycle continues, and heat is transferred from one end of the heat pipe to the other end.

[0039] However, when the heat pipe is faced with a high heat flux density, the reflux flow direction of the liquid working medium in the capillary structure is opposite to the steam flow. The rapid steam flow will hinder the reflux of the liquid working medium, resulting in insufficient liquid supply in the heat pipe, thereby affecting the heat transfer effect; in addition, when the heat pipe is faced with a high heat flux density, the heat pipe performance will reach the heat transfer limit. When the heat transfer limit is reached, dry burning will occur because the liquid in the heat pipe capillary of the evaporation section cannot reflux in time. At this time, the temperature inside the heat pipe rises sharply, that is, the heat pipe cannot work normally. The heat transfer limit of the heat pipe is relatively low. For example, the heat transfer limit of a general 6mm diameter heat pipe is only about 30W, and the heat transfer limit of an 8mm diameter heat pipe is about 50W. In addition, the manufacturing process of traditional heat pipes is relatively complicated, mainly because the production of the capillary structure is very complicated. For example, to sinter the capillary core, the copper powder needs to be heated to about 900 degrees, so that the copper powder is in a semi-melted state and cooled to shape.

[0040] In order to solve the above problems, an embodiment of the present invention provides a heat pipe and a heat dissipation device, and the above-mentioned heat pipe and heat dissipation device are described in detail below.

[0041] First, refer to Figures 2 to 10 The heat pipe provided by the embodiment of the present invention has a length direction. The heat pipe includes a first evaporation section 11, an intermediate section 12 and a first condensation section 13 which are sequentially arranged along the length direction of the heat pipe. The intermediate section 12 includes a liquid working medium flow channel 14 and a gaseous working medium flow channel 15 which are blocked from each other. The gaseous working medium flow channel 15 is located above the liquid working medium flow channel 14. The first evaporation section 11 includes an evaporation space 16 which is connected to the gaseous working medium flow channel 15. A gas-liquid partition 30 is provided at a first end of the liquid working medium flow channel 14 near the evaporation space 16. The first end of the liquid working medium flow channel 14 includes a connecting space 18 which is located below the gas-liquid partition 30. The connecting space 18 is used to connect the liquid working medium flow channel 14 with the evaporation space 16. The first condensation section 13 includes a condensation space 17. The upper and lower parts of the condensation space 17 are respectively connected to the gaseous working medium flow channel 15 and the liquid working medium flow channel 14.

[0042] Specifically, the heat pipe has a sealed cavity structure, and the heat pipe is filled with a liquid working medium. The volume of the filled liquid working medium may be only half of the volume of the sealed cavity in the heat pipe. The sealed cavity may be a vacuum negative pressure environment. The liquid working medium may be water, and the liquid working medium vaporizes into a gaseous working medium, i.e., water vapor, after being heated. The liquid working medium may also be ethanol, or a medium with a low boiling point and capable of rapid vaporization, such as liquid nitrogen. The liquid working medium may also be a medium such as liquid metal, which is not specifically limited in the embodiment of the present invention. The material of the heat pipe may be metal, such as copper, aluminum, stainless steel, etc. In terms of the processing method of the heat pipe, only common machining methods such as milling and drilling are used, which is simple to operate and convenient to process.

[0043] The lower end of the first evaporation section 11 is used to contact with a heating element, which may be a CPU, a GPU, a graphics card, etc. The first evaporation section 11 includes a horizontally arranged contact portion 111. Specifically, the lower surface of the contact portion 111 of the first evaporation section 11 is used to contact with the heating element. The first condensation section 13 is used to cooperate with a heat dissipation component, which may be a capillary heat pipe 50, a heat sink, etc. Figure 4 Along the length direction of the heat pipe, the length of the first evaporation section 11 can refer to "L1", the length of the middle section 12 can refer to "L2", and the length of the first condensation section 13 can refer to "L3". The values ​​of L1, L2 and L3 can be set according to actual needs. L2 can be greater than L3, and L3 can be greater than L1.

[0044] The heating element will emit heat when working, and the heat emitted by the heating element will be transferred to the lower part of the evaporation space 16. The liquid working medium in the evaporation space 16 will be vaporized into a gaseous working medium by the heat. The gaseous working medium will flow to the upper part of the condensation space 17 through the gaseous working medium flow channel 15, and will be liquefied into a liquid working medium in the upper part of the condensation space 17. The liquid working medium will flow to the lower part of the condensation space 17 under the action of gravity, and will flow back to the evaporation space 16 through the liquid working medium flow channel 14. This cycle will be repeated to achieve heat dissipation of the heating element.

[0045] It should be noted that the upper and lower positions can refer to the Figure 3 Specifically, in actual use, the first evaporation section 11 is located above the heating element, that is, the side of the first evaporation section 11 close to the heating element is below the heat pipe. The upper and lower parts of the condensation space 17 are completely connected, that is, after the gaseous working medium releases heat and condenses into liquid working medium in the upper part of the condensation space 17, the liquid working medium drips or flows to the lower part of the condensation space 17 under the action of gravity.

[0046] It should be noted that the mutual blocking of the liquid working medium flow channel 14 and the gaseous working medium flow channel 15 refers to the upper and lower blocking of the gaseous working medium flow channel 15 located above and the liquid working medium flow channel 14 located below. The liquid working medium flow channel 14 has a first end and a second end that are relatively arranged, and the gaseous working medium flow channel 15 has a third end and a fourth end that are relatively arranged. The third end of the gaseous working medium flow channel 15 is connected to the evaporation space 16, and the fourth end of the gaseous working medium flow channel 15 is connected to the upper part of the condensation space 17. The first end of the liquid working medium flow channel 14 is connected to the evaporation space 16 through the connecting space 18, and the second end of the liquid working medium flow channel 14 is connected to the lower part of the condensation space 17.

[0047] The gas-liquid partition 30 is arranged at the first end of the liquid working medium flow channel 14. The arrangement of the gas-liquid partition 30 makes the first end of the liquid working medium flow channel 14 not completely connected to the evaporation space 16, but connected to the evaporation space 16 through the connecting space 18. The liquid working medium flow channel 14 and the gas working medium flow channel 15 are both arranged horizontally, and the gas-liquid partition 30 is arranged vertically. The heat pipe has a height direction, and its height direction is perpendicular to the contact portion 111. Its height direction can refer to Figure 3 The direction indicated by the arrow D. Along the height direction of the heat pipe, the height of the connecting space 18 can be set according to actual needs, such as being set to 1mm-2mm, preferably set to 1.5mm. When the liquid working medium in the evaporation space 16 is heated and vaporized into a gaseous working medium, due to the presence of the gas-liquid partition 30, the gaseous working medium can be blocked from entering the liquid working medium flow channel 14, and because the density of the gaseous working medium is less than that of the liquid working medium, the gaseous working medium cannot pass downward through the connecting space 18 into the liquid working medium flow channel 14. Therefore, the liquid working medium in the evaporation space 16 is heated and vaporized into a gaseous working medium, and the gaseous working medium can only flow to the evaporation space 16 through the gaseous working medium flow channel 15. It should be noted that the flow of the gaseous working medium in the gaseous working medium flow channel 15 is unidirectional, that is, it can only flow from the third end of the gaseous working medium flow channel 15 to the fourth end of the gaseous working medium flow channel 15.

[0048] In the heat pipe provided by the embodiment of the present invention, the liquid working medium flow channel 14 and the gaseous working medium flow channel 15 are mutually isolated, so that the liquid working medium and the gaseous working medium can flow separately in two independent flow channels that do not affect each other, that is, the flow of the gaseous working medium will not hinder the reflux of the liquid working medium, which is conducive to the rapid flow of the liquid working medium and the gaseous working medium, thereby improving the heat transfer effect of the heat pipe, thereby improving the heat transfer limit of the heat pipe; in addition, through the provision of the gas-liquid partition 30, the gaseous working medium in the evaporation space 16 can be prevented from flowing to the liquid working medium flow channel 14, so as to ensure that the gaseous working medium in the evaporation space 16 can only flow to the condensation space 16 through the gaseous working medium flow channel 15, that is, it is ensured that the flow of the liquid working medium and the flow of the gaseous working medium do not affect each other; in addition, the heat pipe provided by the embodiment of the present invention does not need to adopt a capillary structure, has a simple structure, and is easy to process.

[0049] The heat pipe provided in the embodiment of the present invention includes a main pipe portion 20, which includes a first cavity located in the middle section 12, and the main pipe portion 20 also includes a baffle plate 21, which is used to separate the first cavity into a liquid working medium flow channel 14 and a gaseous working medium flow channel 15.

[0050] Specifically, the heat pipe includes a main pipe portion 20 and two end caps 40 welded at both ends of the main pipe portion 20. Figure 5 and Figure 6 The two ends of the main tube 20 are not closed, and the two end caps 40 are used to close the two ends of the main tube 20 so that the heat pipe is a sealed cavity structure. The end caps 40 can be welded to the main tube 20 by high-frequency welding. It should be noted that the main tube 20 can be integrally formed as a whole.

[0051] The main tube portion 20 has a length direction, and the length direction of the main tube portion 20 is consistent with the length direction of the heat pipe. The main tube portion 20 includes a main cavity that runs through its length direction, and the main cavity includes a first cavity located in the middle section 12. The cross-sectional area of ​​the first cavity can be rectangular, circular, triangular, etc., and the cross-section is a cross-section perpendicular to the length direction of the main tube portion 20. The baffle plate 21 is horizontally arranged, and the baffle plate 21 is used to evenly divide the first cavity into a liquid working fluid flow channel 14 and a gaseous working fluid flow channel 15, that is, along the height direction of the heat pipe, the height of the liquid working fluid flow channel 14 and the height of the gaseous working fluid flow channel 15 can be equal. In the embodiment of the present invention, by setting the baffle plate 21, the upper and lower blocking of the liquid working fluid flow channel 14 and the gaseous working fluid flow channel 15 can be ensured.

[0052] Reference Figure 6 and Fig. 9 A plurality of first partitions 22 are arranged on the baffle plate 21, the first partitions 22 are perpendicular to the baffle plate 21, and the plurality of first partitions 22 are used to separate the gaseous working medium flow channel 15 into a plurality of first flow channels; and / or a plurality of second partitions 23 are arranged on the baffle plate 21, the second partitions 23 are perpendicular to the baffle plate 21, and the plurality of second partitions 23 are used to separate the liquid working medium flow channel 14 into a plurality of second flow channels.

[0053] Specifically, a plurality of first baffles 22 are fixed on the upper surface of the baffle plate 21 close to the gaseous medium flow channel 15, and the plurality of first baffles 22 are evenly and spaced apart. The number of the first baffles 22 can be set according to actual needs, such as 2 to 6, and the specific reference is Fig. 9 The number of the first partitions 22 can be set to 3, in which case the three first partitions 22 divide the gaseous working medium flow channel 15 into four first flow channels, and the extension direction of the first flow channels is consistent with the extension direction of the gaseous working medium flow channel 15. Along the length direction of the heat pipe, the length of the first partition 22 is equal to the length of the gaseous working medium flow channel 15.

[0054] A plurality of second baffles 23 are fixed to the lower surface of the baffle plate 21 near the liquid working medium flow channel 14, and the plurality of second baffles 23 are evenly and spaced apart. The number of the second baffles 23 can be set according to actual needs, such as 4 to 9, for details, see Fig. 9 The number of the second partitions 23 can be set to 7. In this case, the 7 second partitions 23 divide the liquid working medium flow channel 14 into 8 second flow channels, and the extension direction of the second flow channels is consistent with the extension direction of the liquid working medium flow channel 14.

[0055] In the embodiment of the present invention, by disposing a plurality of first baffles 22 and a plurality of second baffles 23, the gaseous working medium can perform heat exchange with the plurality of first baffles 22 in the gaseous working medium flow channel 15, and the liquid working medium can perform heat exchange with the plurality of second baffles 23 in the liquid working medium flow channel 14, thereby increasing the heat exchange area and enhancing the heat transfer performance of the heat pipe; in addition, by disposing a plurality of first baffles 22 and a plurality of second baffles 23, the structural strength of the main tube portion 20 is increased, and the collapse of the tube wall of the main tube portion 20 is avoided.

[0056] Reference Figure 6 , Figure 8 and Fig. 9 The gas-liquid partition 30 is perpendicular to the barrier plate 21, and the gas-liquid partition 30 is welded to multiple second partitions 23. The upper surface of the gas-liquid partition 30 is in contact with the lower surface of the barrier plate 21; the difference between the height of the second partition 23 and the height of the gas-liquid partition 30 is greater than or equal to 1 mm and less than or equal to 2 mm.

[0057] Specifically, along the length direction of the heat pipe, the length of the second partition 22 is less than the length of the liquid working medium flow channel 14, and the difference between the length of the liquid working medium flow channel 14 and the length of the second partition 22 is equal to the thickness of the gas-liquid partition 30. The gas-liquid partition 30 is welded to one end of the plurality of second partitions 22 close to the evaporation space 16, and the upper surface of the gas-liquid partition 30 close to the gas working medium flow channel 15 is in contact with the lower surface of the baffle plate 21. Along the height direction of the heat pipe, the height of the second partition 23 is equal to the height of the liquid working medium flow channel 14.

[0058] Along the height direction of the heat pipe, the height of the second partition 23 can be referred to Fig. 9 The height of the gas-liquid partition 30 can be referred to as H1 shown in Figure 8H2 shown in, H1 is greater than H2. Along the height direction of the heat pipe, the difference between the height H1 of the second partition 23 and the height H2 of the gas-liquid partition 30 can be represented by H0, then H0 is greater than or equal to 1 mm, and less than or equal to 2 mm, such as H0 is preferably 1.5 mm. It should be noted that the difference H0 between the height H1 of the second partition 23 and the height H2 of the gas-liquid partition 30 is the height of the connecting space 18. In the embodiment of the present invention, through the above-mentioned arrangement, the gas-liquid partition 30 has a better effect of blocking the gaseous working medium in the evaporation space 16 from entering the liquid working medium flow channel 14.

[0059] The cross-section of the first cavity is rectangular, and the main tube portion 20 has a height direction and a width direction. The main tube portion 20 includes a top plate and a bottom plate 24 that are relatively arranged along the height direction of the main tube portion 20. The bottom plate 24 is provided with a plurality of first fins 25 that are spaced apart along the width direction of the main tube portion 20, and the plurality of first fins 25 are located in the evaporation space 16.

[0060] Specifically, the main tube portion 20 also includes a first side plate and a second side plate which are relatively arranged along the width direction of the main tube portion 20, that is, the first side plate, the top plate, the second side plate and the bottom plate 24 form a main cavity. It should be noted that the upper end of the first partition plate 22 is fixed on the top plate, the lower end of the first partition plate 22 is fixed on the baffle plate 21, the upper end of the second partition plate 23 is fixed on the baffle plate 21, the lower end of the second partition plate 23 is fixed on the bottom plate 24, and the contact portion 111 protrudes from the bottom plate 24, and the contact portion 111 may be integral with the bottom plate 24. A plurality of first fins 25 are fixed on the bottom plate 24, and the plurality of second partitions 23 are evenly and spacedly distributed along the width direction of the main tube portion 20. The plurality of first fins 25 may correspond one-to-one with the plurality of second partitions 23, that is, the number of first fins is equal to the number of second partitions 23. The height of the first fin 25 may be equal to H0, referring to Figure 5 The first fin 25 can be integrated with the second partition 23, that is, the first fin 25 can extend all the way to the second partition 23. At this time, refer to Figure 8 The connecting space 18 is divided into a plurality of connecting grooves by the plurality of first fins 25, and the width of the connecting grooves is consistent with the width of the second flow channel along the width direction of the main tube portion 20. In the embodiment of the present invention, the area of ​​the evaporation surface can be increased and the evaporation heat exchange performance can be enhanced by providing the plurality of first fins 25.

[0061] Reference Fig.10 A plurality of second fins 26 are arranged on the top plate and are distributed at intervals along the width direction of the main tube portion 20 . The plurality of second fins 26 are located in the condensation space 17 .

[0062] Specifically, a plurality of second fins 26 are fixed on the top plate, and the plurality of second fins 26 correspond to the plurality of first partitions 22 one by one, that is, the number of the second fins 26 is equal to the number of the first partitions 22. The second fins 26 can be integrated with the first partitions 22, that is, the second fins 26 can extend toward the gaseous working medium flow channel 15 until they are connected to the first partitions 22. Along the height direction of the heat pipe, the height of the second fins 26 is less than the height of the first partitions 22. In the embodiment of the present invention, by providing a plurality of second fins 26, the heat exchange area in the condensation space 16 can be increased, and the structural strength of the main tube portion 20 can be further increased.

[0063] A plurality of third fins 27 are also fixed to the bottom plate 24. The plurality of third fins 27 are located in the condensing space 17. The plurality of third fins 27 correspond to the plurality of second partitions 23 one by one, that is, the number of the third fins 27 is equal to the number of the second partitions 23. The third fins 27 can be integrated with the second partitions 23, that is, the third fins 27 can extend toward the liquid working medium flow channel 14 until they are connected to the second partitions 23. Along the height direction of the heat pipe, the height of the third fins 27 is less than the height of the second partitions 23.

[0064] Along the height direction of the heat pipe, there is a preset distance between the second fin 26 and the third fin 27, and the value of the preset distance can be set according to actual needs. Fig. 9 and Fig.10 A plurality of third baffles 29 are also fixed on the top plate, the number of the third baffles 29 is equal to the number of the first flow channels, the plurality of third baffles 29 are respectively located in the plurality of first flow channels, and the third baffles 29 extend all the way to the condensing space 17. Along the height direction of the heat pipe, the height of the third baffles 29 is less than the height of the second fins 26.

[0065] Reference Fig.11 A mounting portion is provided on the outer wall of the main tube portion 20, and the mounting portion is located at the first condensing section 13 and one end of the middle section 12 close to the first condensing section 13. A plurality of mounting groove groups 28 are arranged on the mounting portion at intervals along the length direction of the heat pipe. The mounting groove group 28 includes a first mounting groove and a second mounting groove that are relatively arranged along the height direction of the main tube portion 20. The mounting groove group 28 is used to install the capillary heat pipe 50.

[0066] Specifically, the mounting portion specifically includes an upper mounting portion fixed on the top plate and a lower mounting portion fixed on the bottom plate 24, the upper mounting portion can be integral with the top plate, the lower mounting portion can be integral with the bottom plate 24, and the upper mounting portion and the lower mounting portion are arranged opposite to each other. A plurality of first mounting grooves are arranged on the upper mounting portion, and a plurality of second mounting grooves are arranged on the lower mounting portion. The mounting portion is located at the first condensation section 13 and at one end of the middle section 12 close to the first condensation section 13, that is, the mounting portion is composed of a portion located at the first condensation section 13 and a portion located at one end of the middle section 12 close to the first condensation section 13. The orthographic projection of the mounting portion on the bottom plate 24 covers the orthographic projection of the plurality of second fins 26 on the bottom plate 24.

[0067] The number of the mounting slot groups 28 provided on the mounting portion can be set according to actual needs. For example, the number of the mounting slot groups 28 can be set to 10. In this case, the number of the first mounting slots and the number of the second mounting slots are both 10. Fig.11 The mounting groove group 28 is specifically used to install a U-shaped capillary heat pipe 50, and one mounting groove group 28 is used to install one capillary heat pipe 50. The capillary heat pipe 50 includes a second evaporation section, an insulation section, and a second condensation section. The mounting groove group 28 is specifically used to install the second evaporation section of the capillary heat pipe 50. In the embodiment of the present invention, by providing a plurality of mounting groove groups 28, a plurality of capillary heat pipes 50 can be installed on the heat pipe, so that the first condensation section 13 of the heat pipe can dissipate heat better. It should be noted that in other embodiments, the mounting groove group 28 can be directly used to install a plurality of heat sinks.

[0068] In a second aspect, an embodiment of the present invention provides a heat dissipation device, which is provided with any one of the heat pipes in the above first aspect.

[0069] In the heat pipe in the heat dissipation device provided by the embodiment of the present invention, the liquid working medium flow channel 14 and the gaseous working medium flow channel 15 are mutually isolated, so that the liquid working medium and the gaseous working medium can flow separately in two independent and mutually non-interfering flow channels, that is, the flow of the gaseous working medium will not hinder the reflux of the liquid working medium, which is conducive to the rapid flow of the liquid working medium and the gaseous working medium, thereby improving the heat transfer effect of the heat pipe, thereby improving the heat transfer limit of the heat pipe; in addition, through the provision of the gas-liquid partition 30, it is possible to prevent the gaseous working medium in the evaporation space 16 from flowing to the liquid working medium flow channel 14, so as to ensure that the gaseous working medium in the evaporation space 16 can only flow to the condensation space 16 through the gaseous working medium flow channel 15, that is, it is ensured that the flow of the liquid working medium and the flow of the gaseous working medium do not interfere with each other; in addition, the heat pipe in the heat dissipation device provided by the embodiment of the present invention does not need to adopt a capillary structure, has a simple structure, and is easy to process.

[0070] The heat dissipation device provided in the embodiment of the present invention includes the various structures of the heat pipe in any of the above embodiments, which will not be described here to avoid repetition. And because the heat dissipation device includes the above heat pipe, it also has any beneficial effects of the above heat pipe.

[0071] The heat dissipation device provided by the embodiment of the present invention also includes a plurality of capillary heat pipes 50, which are arranged on the outer wall of the heat pipe at intervals along the length direction of the heat pipe. The capillary heat pipe 50 includes a second evaporation section, an insulation section and a second condensation section. The second evaporation section of the plurality of capillary heat pipes 50 is located at the first condensation section 13 and one end of the middle section 12 close to the first condensation section 13.

[0072] Specifically, the number of capillary heat pipes 50 can be set according to actual needs, such as 10. The heat pipe includes a main pipe portion 20, and a mounting portion is provided on the outer wall of the main pipe portion 20, and the mounting portion is located at the first condensation section 13 and the middle section 12 at one end close to the first condensation section 13. A plurality of mounting groove groups 28 are arranged at intervals along the length direction of the heat pipe on the mounting portion, and the mounting groove group 28 includes a first mounting groove and a second mounting groove that are relatively arranged along the height direction of the main pipe portion 20. The capillary heat pipe 50 corresponds to the mounting groove group 28 one by one, and the second evaporation section of the capillary heat pipe 50 is installed on the mounting groove group 28. In the embodiment of the present invention, through the provision of multiple capillary heat pipes 50, the first condensation section 13 of the heat pipe can dissipate heat better.

[0073] Reference Fig.11 and Fig.12 The capillary heat pipe 50 is a U-shaped capillary heat pipe, and the multiple capillary heat pipes 50 include multiple first capillary heat pipes 51 and multiple second capillary heat pipes 52. The direction of the second condensation section of the first capillary heat pipe 51 is opposite to the direction of the second condensation section of the second capillary heat pipe 52. A plurality of first heat sinks 60 are arranged at intervals along the length direction of the first capillary heat pipe 51 on the multiple first capillary heat pipes 51, and a plurality of second heat sinks 70 are arranged at intervals along the length direction of the second capillary heat pipe 52 on the multiple second capillary heat pipes 52.

[0074] Specifically, the number of the first capillary heat pipes 51 and the number of the second capillary heat pipes 52 are equal. When the number of the capillary heat pipes 50 is set to 10, the number of the first capillary heat pipes 51 is set to 5, and the number of the second capillary heat pipes 52 is set to 5. The first capillary heat pipes 51 and the second capillary heat pipes 52 are alternately arranged. The second condensation section of the first capillary heat pipe 51 is located on one side of the width direction of the main tube portion 20, and the second condensation section of the second capillary heat pipe 50 is located on the other side of the width direction of the main tube portion 20. In the embodiment of the present invention, the heat can be better transferred to the air by the arrangement of multiple first heat sinks 60 and multiple second heat sinks 70.

[0075] The heat pipe is also provided with a connecting plate 80, and a through slot is provided on the connecting plate 80, and the contact portion 111 passes through the through slot to contact the heating element. The connecting plate 80 is also provided with a plurality of screw holes, and when the heating element is a CPU and the CPU is provided on a circuit board, the connecting plate 80 can be screwed on the circuit board so that the contact portion 111 presses the heating element tightly.

[0076] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0077] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0078] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0079] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

[0080] The heat pipe and heat dissipation device provided by the present invention are introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the present invention. The description of the above embodiments is only used to help understand the structure and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A heat pipe, It is characterized in that The heat pipe has a length direction, and the heat pipe comprises a first evaporation section, a middle section and a first condensation section arranged in sequence along the length direction of the heat pipe, the middle section comprises a liquid working medium flow channel and a gaseous working medium flow channel which are blocked from each other, and the gaseous working medium flow channel is located above the liquid working medium flow channel; The first evaporation section includes an evaporation space, which is connected to the gaseous working medium flow channel. A gas-liquid partition is provided at the first end of the liquid working medium flow channel near the evaporation space. The first end of the liquid working medium flow channel includes a connecting space located below the gas-liquid partition, and the connecting space is used to connect the liquid working medium flow channel with the evaporation space. The first condensation section includes a condensation space, and the upper and lower parts of the condensation space are respectively connected to the gaseous working medium flow channel and the liquid working medium flow channel.

2. The heat pipe according to claim 1, It is characterized in that The heat pipe comprises a main pipe portion, the main pipe portion comprises a first cavity located in the middle section, and the main pipe portion further comprises a baffle plate, the baffle plate is used to separate the first cavity into the liquid working medium flow channel and the gaseous working medium flow channel.

3. The heat pipe according to claim 2, It is characterized in that A plurality of first baffles are arranged on the baffle plate, the first baffles are perpendicular to the baffle plate, and the plurality of first baffles are used to separate the gaseous working medium flow channel into a plurality of first flow channels; And / or, a plurality of second partitions are arranged on the baffle plate, the second partitions are perpendicular to the baffle plate, and the plurality of second partitions are used to separate the liquid working medium flow channel into a plurality of second flow channels.

4. The heat pipe according to claim 3, It is characterized in that The gas-liquid partition is perpendicular to the baffle plate, the gas-liquid partition is welded to the plurality of second baffle plates, and the upper surface of the gas-liquid partition is in contact with the lower surface of the baffle plate; The difference between the height of the second partition plate and the height of the gas-liquid partition plate is greater than or equal to 1 mm and less than or equal to 2 mm.

5. The heat pipe according to any one of claims 2 to 4, It is characterized in that The cross-section of the first cavity is rectangular, the main tube portion has a height direction and a width direction, the main tube portion includes a top plate and a bottom plate relatively arranged along the height direction of the main tube portion, and a plurality of first fins are arranged on the bottom plate and distributed at intervals along the width direction of the main tube portion, and the plurality of first fins are located in the evaporation space.

6. The heat pipe according to claim 5, It is characterized in that The top plate is provided with a plurality of second fins spaced apart and distributed along the width direction of the main tube portion, and the plurality of second fins are located in the condensation space.

7. The heat pipe according to claim 6, It is characterized in that An installation portion is provided on the outer wall of the main tube portion, and the installation portion is located at the first condensation section and one end of the middle section close to the first condensation section. A plurality of installation groove groups are arranged on the installation portion at intervals along the length direction of the heat pipe, and the installation groove groups include a first installation groove and a second installation groove that are relatively arranged along the height direction of the main tube portion, and the installation groove group is used to install a capillary heat pipe.

8. A heat dissipation device, It is characterized in that A heat pipe comprising the heat pipe according to any one of claims 1 to 7.

9. The heat dissipation device according to claim 8, It is characterized in that It also includes a plurality of capillary heat pipes, which are arranged on the outer wall of the heat pipe at intervals along the length direction of the heat pipe, and the capillary heat pipe includes a second evaporation section, an insulation section and a second condensation section. The second evaporation section of the plurality of capillary heat pipes is located at the first condensation section and one end of the middle section close to the first condensation section.

10. The heat dissipation device according to claim 9, It is characterized in that The capillary heat pipe is a U-shaped capillary heat pipe, the plurality of capillary heat pipes include a plurality of first capillary heat pipes and a plurality of second capillary heat pipes, and the direction of the second condensation section of the first capillary heat pipe is opposite to the direction of the second condensation section of the second capillary heat pipe; A plurality of first heat sinks are arranged at intervals on the plurality of first capillary heat pipes along the length direction of the first capillary heat pipes, and a plurality of second heat sinks are arranged at intervals on the plurality of second capillary heat pipes along the length direction of the second capillary heat pipes.

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