Heat dissipation unit with axial capillary

Abstract

The present invention provides a heat dissipation unit with axial capillary, comprising a shell and at least one tube body, the shell having a shell chamber in which a shell capillary structure is formed and at least one opening connected to the shell chamber, the tube body having at least one axial capillary structure, an open end and a closed end defining a tube chamber connected to the open end, the axial capillary structure being arranged in the tube body, the open end being plugged into the opening, and the axial capillary structure directly abutting against the shell capillary structure on the inner bottom side of the shell; through the design of the present invention, a better capillary transmission effect is achieved.

Description

Technical Field

[0001] The invention relates to a heat dissipation unit with axial capillaries, in particular to a heat dissipation unit with axial capillaries which can achieve better capillary transmission effect. Background Art

[0002] As the computing speed of electronic components continues to increase, the heat generated is also increasing. In order to effectively solve this high heat problem, the industry has widely used heat pipes and vapor chambers with good thermal conductivity. Although heat pipes can make the flow direction of the internal gaseous working fluid consistent, the amount of heat they can conduct is quite limited due to the limitation of volume. Although vapor chambers have a spacious heating area to provide direct attachment and conduction to the heat source, the flow direction of the gaseous working fluid is quite chaotic, which will limit their heat conduction performance.

[0003] Some industry insiders have also combined the existing temperature equalizing plate and heat pipe, mainly by vertically installing the heat pipe on the temperature equalizing plate so that the chambers inside the two are connected, and the entire inner ring wall surface of the chamber of the heat pipe is composed of a tube wall capillary structure composed of sintered powder or a woven mesh, and the upper and lower inner walls of the chamber of the temperature equalizing plate are also formed with a plate wall capillary structure composed of sintered powder or a woven mesh. Since the capillary structure of the tube wall on the inner ring wall of the heat pipe is a capillary force generated by the pores between multiple sintered powder bodies and or the pores of the woven mesh, the condensed working fluid is adsorbed and refluxed to the capillary structure of the upper plate wall of the lower inner wall of the chamber of the uniform temperature plate below, so as to repeat the continuous vapor-liquid circulation to dissipate heat. However, a problem is extended. When the working fluid (liquid working fluid) is cooled on the inner ring wall of the chamber of the heat pipe, it will be adsorbed by the capillary force of the pores of the tube wall capillary structure on the inner ring wall of the heat pipe and the capillary force of the pores of the woven mesh and slowly diffuse around on the entire inner ring wall of the heat pipe, and at the same time slowly reflux downward along different places on the inner ring wall of the heat pipe to the capillary structure of the upper plate wall of the lower inner wall of the chamber of the uniform temperature plate below, so that the cooled liquid working fluid cannot quickly flow back to the uniform temperature plate, resulting in insufficient working fluid and dry burning. Therefore, the capillary structure of the tube wall and the braided mesh made of sintered powder in the above-mentioned conventional heat pipe transmits the liquid working fluid very slowly by means of the capillary phenomenon, resulting in poor overall capillary transmission efficiency and poor heat dissipation effect. Summary of the invention

[0004] An object of the present invention is to provide a heat dissipation unit with axial capillaries that can achieve better capillary transmission effect and improve heat dissipation efficiency.

[0005] Another object of the present invention is to provide a shell capillary structure connected to a shell by an axial capillary structure provided on the inner side of at least one tube body, so that a cooled working fluid (i.e., liquid working fluid) will be quickly returned to the shell along the axial direction by the axial capillary force of the axial capillary structure, so as to achieve an axial capillary heat dissipation unit with directional flow of the working fluid.

[0006] To achieve the above object, the present invention provides a heat dissipation unit with axial capillaries, characterized in that it comprises:

[0007] A shell having a shell chamber and at least one opening, wherein the shell chamber has a working fluid and a shell capillary structure formed in the shell chamber, and the at least one opening passes through a top side of the shell and communicates with the shell chamber; and

[0008] At least one tube body has at least one axial capillary structure, an open end and a closed end corresponding to the open end, the open end and the closed end jointly define a tube body chamber, and the open end connects the tube body chamber and the shell chamber, the at least one axial capillary structure is arranged in the tube body and distributed along the longitudinal direction of the tube body, the open end of the tube body is inserted into the at least one opening, and the axial capillary structure directly abuts the shell capillary structure on the bottom side of the shell in the shell chamber.

[0009] The heat dissipation unit with axial capillary structure, wherein: a connecting portion is integrally extended from the open end to directly abut the bottom side in the shell chamber, and the axial capillary structure is extended axially from the inner side of the tube body adjacent to the closed end toward the direction corresponding to the connecting portion.

[0010] The heat dissipation unit with axial capillary structure, wherein: the axial capillary structure contacts and connects the shell capillary structure on the top side of the shell adjacent to the at least one opening in the shell chamber.

[0011] The heat dissipation unit with axial capillary, wherein: the tube body is provided with a tube body capillary structure, the tube body capillary structure is formed on the inner side of the tube body, the axial capillary structure is arranged on the surface of the tube body capillary structure on the inner side of the tube body and are in contact and connected with each other, and the tube body capillary structure on the inner side of the tube body located at the open end is in contact with the axial capillary structure to connect the shell capillary structure on the bottom side in the shell chamber.

[0012] The heat dissipation unit with axial capillary, wherein: the tube body is provided with a tube body capillary structure, the tube body capillary structure is formed inside the tube body, and the tube body capillary structure contacts and connects the axial capillary structure on the inner side of the adjacent tube body, and the tube body capillary structures adjacent to each other on the inner side of the tube body located at the open end contact and connect the shell capillary structure on the bottom side within the shell chamber.

[0013] The heat dissipation unit with axial capillaries, wherein: the shell is a temperature equalizing plate, a heat plate or a flat heat pipe.

[0014] The heat dissipation unit with axial capillaries, wherein: the tube body is a heat pipe.

[0015] The heat dissipation unit with axial capillaries, wherein: the capillary structure of the tube body and the capillary structure of the shell body are selected to be any one or any combination of a powder sintered body, a grid body, a fiber body, a groove, and a whisker.

[0016] The heat dissipation unit with axial capillaries, wherein: the axial capillary structure is any one or any combination of fiber bundles, fiber lines, braids, grooves.

[0017] The design of the heat dissipation unit with axial capillaries of the present invention can effectively achieve a better capillary transmission effect, improve the heat dissipation efficiency and achieve the effect of directional flow of the working fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a three-dimensional decomposition of the first embodiment of the present invention.

[0019] Figure 2 It is a schematic diagram of a three-dimensional combination of the first embodiment of the present invention.

[0020] Figure 2A It is a schematic diagram of a combined cross section of the first embodiment of the present invention.

[0021] Figure 2B It is a schematic diagram of a combined cross-section of the first embodiment of the present invention in another alternative embodiment.

[0022] Figure 2C It is a schematic diagram of a combined cross-section of the first embodiment of the present invention in another alternative embodiment.

[0023] Figure 2D It is a schematic diagram of a combined cross-section of yet another alternative embodiment of the first embodiment of the present invention.

[0024] Explanation of the reference numerals: shell 11; shell chamber 111; opening 112; shell capillary structure 113; top side 115; bottom side 116; tube 31; tube chamber 3111; open end 3112; closed end 3114; connecting portion 3116; tube capillary structure 313; axial capillary structure 41. DETAILED DESCRIPTION

[0025] The above-mentioned objects and the structural and functional characteristics of the present invention will be described based on the preferred embodiments shown in the accompanying drawings.

[0026] The present invention provides a heat dissipation unit with axial capillaries, see Figure 1 is a schematic diagram of a three-dimensional exploded view of a first embodiment of the present invention; Figure 2 is a schematic diagram of a three-dimensional combination of a first embodiment of the present invention; Figure 2A is a schematic diagram of a combined cross section of a first embodiment of the present invention; Figure 2B A schematic diagram of a combined cross-section of an alternative embodiment of the first embodiment of the present invention; Figure 2C A schematic diagram of a combined cross-section of another alternative embodiment of the first embodiment of the present invention; Figure 2D Schematic diagram of a combined cross section of an alternative embodiment of the first embodiment of the present invention. The heat dissipation unit includes a shell 11 and at least one tube 31. The shell 11 is represented as a temperature plate in this embodiment, but is not limited thereto; wherein the shell 11 has a shell chamber 111, a top side 115, a bottom side 116 and at least one opening 112, and the shell chamber 111 is defined between the top side 115 and the bottom side 116. The shell chamber 111 has a working fluid (such as pure water or methanol; not shown in the figure) and a shell capillary structure 113 formed in the shell chamber 111. In one embodiment, the shell 11 can also be a hot plate or a flat heat pipe.

[0027] The shell capillary structure 113 is formed on the inner wall of the shell chamber 111 (i.e., on the top side 115 and the bottom side 116 in the shell chamber 111) with a sintered powder body in this embodiment, but it is not limited thereto. In a specific implementation, the shell capillary structure 113 disposed in the shell chamber 111 can be selected as a grid body, a fiber body, a groove, a whisker, or any combination of the above. The opening 112 passes through the top side 115 of the shell 11 and communicates with the shell chamber 111. The opening 112 is represented as one opening 112 in this embodiment. In a specific implementation, the number of the aforementioned openings 112 can be one or more, and the number of the openings 112 is designed to match the number of the aforementioned tubes 31 (such as heat pipes). The tube body 31 in this embodiment is represented as a heat pipe, and the tube body 31 has at least one axial capillary structure 41, an open end 3112 and a closed end 3114 opposite to the open end 3112. The open end 3112 and the closed end 3114 jointly define a tube body chamber 3111, and the tube body chamber 3111 is located between the open end 3112 and the closed end 3114 and is connected to the open end 3112. The open end 3112 of the tube body 31 is directly inserted into the opening 112 of the shell 11, and the outer side of the tube body 31 is tightly combined with the inner wall of the opening 112 facing the shell 11, and the tube body chamber 3111 is connected to the shell chamber 111 through the open end 3112, and the shell chamber 111 is connected to the tube body chamber 3111, but it is not limited to this.

[0028] A connecting portion 3116 is integrally extended from the open end 3112, and the connecting portion 3116 in the shell chamber 111 is directly connected to the bottom side 116 of the shell 11 in the shell chamber 111, and a notch or opening shape is formed between the open end 3112 and the connecting portion 3116. The connecting portion 3116 is a part of the tube body 31, and the inner side of the connecting portion 3116 is the inner side of the tube body 31. Therefore, the bottom side 116 in the shell chamber 111 and the outer side of the tube body 31 are connected to the inner wall of the opening 112 through the connecting portion 3116 of the tube body 31 to form a supporting structure supporting the shell chamber 111. In this way, there is no need to set (or no setting) a supporting copper column connecting the top side 115 and the bottom side 116 in the shell chamber 111, so as to effectively achieve the effect of cost saving.

[0029] In addition, the axial capillary structure 41 in this embodiment is represented by a plurality of fiber lines (such as glass or carbon fiber or polymer fiber lines of metal or non-metallic material) twisted and wound together to form a dense (or solid) axial capillary structure, and has excellent axial capillary force. However, in specific implementation, the axial capillary structure can be selected as a fiber bundle, a braid, a groove or any combination of the above, and any capillary structure that can provide the liquid working fluid only in the axial capillary transmission is the axial capillary structure referred to in the present invention, which is first stated. The axial capillary structure 41 is disposed on the inner side of the tube body 31 and distributed along the longitudinal direction (or axial direction) of the tube body 31 to directly contact the bottom side of the shell in the shell chamber 111 and the shell capillary structure 113 thereon. In the present embodiment, the axial capillary structure 41 is formed by a plurality of axial capillary structures 41 extending axially from the inner side of the tube body 31 adjacent to the closed end 3114 toward the direction corresponding to the connecting portion 3116 to directly contact and connect the bottom side 116 in the shell chamber 111 and the shell capillary structure 113 thereon. The capillary structure contacts the top side of the shell adjacent to the opening in the shell chamber 111, and the shell capillary structure 113 is thereon. Therefore, the axial capillary structure 41 with axial capillary action is arranged on the inner side of the tube chamber 3111 of the tube body 31 in the longitudinal direction, so that the cooled working fluid (i.e., liquid working fluid) will be quickly returned to the bottom side 116 in the shell chamber 111 along the axial direction by the axial capillary force of the axial capillary structures 41, so that the working fluid flow has directionality and a better heat dissipation effect is effectively achieved. In addition, since the axial capillary structure 41 axially arranged in the tube body 31 serves as a capillary transmission path for axially transmitting the liquid working fluid, the capillary transmission force on the liquid working fluid can be increased, and a better capillary transmission effect can be effectively achieved. In one embodiment, the number of the axial capillary structures 41 can be adjusted by the user in advance according to the heat dissipation requirements, the size of the tube body 31 and the capillary transmission efficiency design, such as setting one axial capillary structure 41 or more than one axial capillary structure 41 on the inner side of the tube body chamber 3111 of the tube body 31. In another embodiment, a whisker structure or an oxide film (such as a hydrophilic film) is provided on the axial capillary structure 41.

[0030] In an alternative embodiment, see Figure 2D , the connecting portion 3116 of the tube 31 can be omitted to increase the space (or vapor space) for the vapor working fluid to flow in the housing chamber 111. In another alternative embodiment, the housing capillary structure 113 on the top side 115 of the housing 11 in the housing chamber 111 can be omitted, and only the housing capillary structure 113 is provided on the bottom side 116 of the housing 11 in the housing chamber 111 to directly connect with the axial capillary structure 41.

[0031] The following is an example implementation description:

[0032] When the outer surface of the bottom side 116 of the shell 11 is attached to a heating element (such as a central processing unit or MCU or other electronic element that needs to dissipate heat) of an electronic device (such as a computer, a notebook computer, a smart mobile device or a communication device; not shown in the figure), the bottom side 116 of the shell 11 will absorb the heat generated by the heating element, so that the working fluid of the shell capillary structure 113 on the bottom side 116 of the shell chamber 111 is heated and evaporated and converted into an evaporated working fluid (or vapor working fluid), so that the evaporated working fluid will flow toward the top side 115 in the shell chamber 111, and at the same time, a part of the evaporated working fluid will also flow to the open end 3112 of the tube 31. The evaporated working fluid in the tube body chamber 3111 is converted into a cooled working fluid (or liquid working fluid) after condensing on the top side 115 in the shell chamber 111 and on the closed end 3114 in the tube body chamber 3111. At this time, the cooled working fluid on the closed end 3114 in the tube body chamber 3111 rapidly flows back in the axial direction to the bottom side 116 in the shell chamber 111 and the shell capillary structure 113 thereon by virtue of the axial capillary force of the axial capillary structures 41, thereby making the working fluid continuously circulate in the shell chamber 111 and the tube body chamber 3111, so as to effectively achieve better heat dissipation effect, better capillary transfer efficiency and improved heat transfer efficiency.

[0033] In another alternative embodiment, see Figure 2BThe tube body 31 is provided with a tube body capillary structure 313, and the tube body capillary structure 313 is represented as a powder sintered body in this alternative embodiment, but is not limited to this. In a specific implementation, the tube body capillary structure 313 can be selected as a grid body, a fiber body, a groove, a whisker or any multiple combination of the foregoing. The tube body capillary structure 313 is formed on the inner side of the tube body chamber 3111 of the tube body 31, and the axial capillary structure 41 is arranged on the inner side of the tube body 31 on the surface of the tube body capillary structure 313 and is in contact and connected with each other, and the tube body capillary structure 313 and the axial capillary structure 41 are in contact and connected with the top side, bottom side 115, 116 in the shell chamber 111 on the inner side of the tube body 31 located at the open end 3112, and the shell capillary structure 113 is arranged on the inner side of the tube body 31. Through the axial capillary force of the axial capillary structures 41, a part of the cooling working fluid absorbed on the tube body capillary structure 313 is quickly returned to the shell chamber 111 in a specific direction, which is the axial direction. 11, and at the same time, the capillary force of the tube body capillary structure 313 will return another part of the cooling working fluid in the axial direction and radial direction to the bottom side 116 of the shell chamber 111. In the process of the shell capillary structure 113, the radial capillary force of the tube body capillary structure 313 will also transfer the adsorbed cooling working fluid to the adjacent corresponding axial capillary structure 41, so as to provide a capillary transmission path for the working fluid through the single axial capillary transmission of the axial capillary structure 41, and can also rely on the axial and radial capillary transmission of the tube body capillary structure 313, so as to achieve a better capillary transmission effect and increase the vapor-liquid circulation efficiency.

[0034] In another alternative embodiment, see Figure 2C , the tube body capillary structure 313 is redesigned to be on one side or both sides of each axial capillary structure 41. The tube body capillary structure 313 of this alternative embodiment is formed on the inner side of the tube body 31 on both sides of each axial capillary structure 41 (or between every two axial capillary structures 41), so that the tube body capillary structure 313 contacts and connects the inner side of the adjacent tube body 31 and the side of each axial capillary structure 41 thereon, and the tube body capillary structures 313 and the axial capillary structures 41 adjacent to each other on the inner side of the tube body 31 located at the open end 3112 are staggered and contact and connect the top and bottom sides 115 and 116 in the shell chamber 111 and the shell capillary structure 113 thereon, so as to provide a capillary transmission path for the working fluid to pass through the uniaxial capillary transmission of the axial capillary structure 41, and also rely on the axial and radial capillary transmission of the tube body capillary structure 313, thereby effectively achieving a better capillary transmission effect and increasing the vapor-liquid circulation efficiency.

[0035] Therefore, through the design of the heat dissipation unit with axial capillaries of the present invention, a better capillary transmission effect is effectively achieved and the heat dissipation efficiency is improved.

Claims

1. A heat dissipation unit with axial capillaries, characterized in that: include: A shell having a shell chamber and at least one opening, wherein the shell chamber has a working fluid and a shell capillary structure formed in the shell chamber, and the at least one opening passes through a top side of the shell and communicates with the shell chamber; and At least one tube body has at least one axial capillary structure, an open end and a closed end corresponding to the open end, the open end and the closed end jointly define a tube body chamber, and the open end connects the tube body chamber and the shell chamber, the at least one axial capillary structure is arranged in the tube body and distributed along the longitudinal direction of the tube body, the open end of the tube body is plugged into the at least one opening, and the axial capillary structure directly abuts against the shell capillary structure on the bottom side of the shell in the shell chamber; the open end is integrally extended to form a connecting portion that directly abuts against the shell On the bottom side of the body cavity, the axial capillary structure extends axially from the inner side of the tube body adjacent to the closed end toward the direction corresponding to the connecting portion, and the axial capillary structure contacts and connects the shell capillary structure on the top side of the shell adjacent to the at least one opening in the shell chamber; the inner side of the tube body has a tube body capillary structure, and the axial capillary structure is arranged on the surface of the tube body capillary structure and is in contact and connected with each other, so as to transfer a part of the adsorbed working fluid to the adjacent corresponding axial capillary structure through the radial capillary force of the tube body capillary structure.

2. The heat dissipation unit with axial capillaries according to claim 1, characterized in that: The tube body capillary structure located on the inner side of the tube body at the open end contacts the axial capillary structure and connects to the shell capillary structure on the bottom side in the shell chamber.

3. The heat dissipation unit with axial capillaries according to claim 1, characterized in that: The shell is a temperature equalizing plate, a heat plate or a flat heat pipe.

4. The heat dissipation unit with axial capillaries according to claim 1, characterized in that: The pipe body is a heat pipe.

5. The heat dissipation unit with axial capillaries according to claim 2, characterized in that: The capillary structure of the tube body and the capillary structure of the shell body are selected to be any one or any combination of a powder sintered body, a grid body, a fiber body, a groove, a whisker.

6. The heat dissipation unit with axial capillaries according to claim 1, characterized in that: The axial capillary structure is any one or any combination of fiber bundles, fiber lines, braids, and grooves.

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