TWM584883U - Heat dissipation unit with axial capillary - Google Patents

Abstract

The present invention provides a heat dissipating unit with an axial capillary, which includes a shell and at least one pipe body. The shell has a shell cavity in which a shell capillary structure is formed and at least one opening communicating with the shell cavity. The tube body has at least one axial capillary structure, an open end and a closed end which define a tube cavity connected to the open end. The axial capillary structure is disposed in the tube body, and the open end is plugged into the opening, and The axial capillary structure directly abuts the capillary structure of the upper casing on the inner bottom side of the casing; through this creative design, a better capillary transmission effect is achieved.

Description

Radiating unit with axial capillary

This creation relates to a heat dissipating unit with axial capillary, especially a heat dissipating unit with axial capillary that can achieve better capillary transmission effect.

As the computing speed of electronic components continues to increase, the heat generated by them is also getting higher and higher. In order to effectively solve this problem of high heat generation, the industry has adopted heat pipes and heat equalizing plates (Vapor) with good thermal conductivity. Chamber) is widely used. Although the heat pipe has the same flow direction of the gaseous working fluid inside, it can only conduct a limited amount of heat due to the volume limitation.Although the isothermal plate has a wide heating area, The heating source is directly attached to the conduction, but the flow of the gaseous working fluid is quite disordered, which will limit its heat dissipation performance.
Some manufacturers also combine the conventional temperature equalizing plate with the heat pipe, mainly by setting the heat pipe on the temperature equalizing plate so that the internal chambers of the two are connected, and the entire inner ring wall surface of the chamber of the heat pipe is formed by The capillary wall structure or woven mesh formed by the sintered powder body is also formed, and the upper and lower inner walls of the chamber of the soaking plate are also formed with the plate wall capillary structure made of the sintered powder body or woven mesh. Because the capillary wall capillary structure on the inner wall surface of the heat pipe is wicked by the capillary force generated by the pores of the plurality of sintered powder bodies or the pores of the braided mesh, the condensed working fluid is adsorbed and returned to the temperature equalizing plate below. The upper inner wall of the lower wall of the chamber has a capillary structure that repeats the continuous vapor-liquid cycle to dissipate heat, but it has a problem, because the working fluid (liquid working fluid) that is cooled when the inner wall of the inner wall of the heat pipe is cooled by the The capillary force of the porous structure of the capillary structure of the inner wall of the heat pipe and the capillary force of the porous structure of the braided mesh absorb and slowly diffuse around the entire inner pipe wall of the heat pipe, while slowly moving downward along the entire heat pipe. Different parts of the inner ring wall return to the capillary structure of the upper and lower wall of the lower inner wall of the chamber below the temperature equalizing plate, so that the liquid working fluid after cooling cannot not only return to the temperature equalizing plate quickly, resulting in insufficient working fluid. And the problem of dry burning. Therefore, the capillary structure of the wall of the conventional heat pipe made of sintered powder body and / or the braided mesh is very slow to transfer the liquid working liquid by this capillary phenomenon, so that the overall capillary transmission efficiency is poor and the heat dissipation effect is poor. problem.

One of the purposes of this creation is to provide a heat dissipation unit with an axial capillary that can achieve better capillary transmission and improve heat dissipation efficiency.
Another object of this creation is to provide a shell capillary structure in a shell through an axial capillary structure provided on the inner side of at least one pipe body, so that a cooled working fluid (that is, a liquid working fluid) will be The axial capillary force of the axial capillary structure is quickly returned to the casing along the axial direction, thereby achieving an axial capillary heat dissipation unit with directivity of the working fluid flow.
In order to achieve the above object, the present invention provides a heat dissipating unit with an axial capillary, which includes a casing and at least one pipe body, the casing has a casing cavity and at least one opening, and the casing cavity has a working fluid and A housing capillary structure formed in the housing cavity, the at least one opening is penetrating a top side of the housing and communicates with the housing cavity, the at least one pipe body has at least one axial capillary structure, an open end and A pair of closed ends that should be open ends, the open ends and the closed ends jointly define a tube cavity, and the open ends are connected to the tube cavity and the housing cavity, and the axial capillary structure is disposed in the tube cavity, and Distributed along the longitudinal direction of the pipe body, the open end of the pipe body is plugged into the at least one opening, and the axial capillary structure directly abuts the bottom side of the housing inside the housing cavity and the housing capillary structure thereon. Through the design of the axial capillary heat dissipation unit of this creation, it can effectively achieve better capillary transmission effect, improve heat dissipation efficiency and achieve the directional effect of working fluid flow.

The above-mentioned purpose of this creation and its structural and functional characteristics will be explained according to the preferred embodiments of the drawings.
This creation provides a heat dissipating unit with an axial capillary. Please refer to Figure 1 for a three-dimensional decomposition diagram of the first embodiment of the creation; Figure 2 for a three-dimensional assembly diagram of the first embodiment of the creation; Section 2A The figure is a schematic diagram of the combined section of the first embodiment of the creation; FIG. 2B is the schematic diagram of the combined section of the first embodiment of the creation in an alternative embodiment; and FIG. 2C is the first embodiment of the creation. A schematic diagram of a combined section in another alternative embodiment; FIG. 2D is a schematic diagram of a combined section in an alternative embodiment of the first embodiment of the creation. The heat dissipation unit includes a casing 11 and at least one tube 31. The casing 11 is shown as a temperature equalizing plate in this embodiment, but is not limited thereto. The casing 11 has a casing cavity 111 and a ceiling. Side 115, a bottom side 116 and at least one opening 112, the housing chamber 111 is defined between the top side 115 and the bottom side 116, and the housing chamber 111 has a working fluid (such as pure water or methanol; in the figure) (Not shown) and a housing capillary structure 113 formed in the housing cavity 111. In one embodiment, the casing 11 can also be a hot plate or a flat plate heat pipe.
The casing capillary structure 113 is formed on the inner wall of the casing cavity 111 (that is, on the top side 115 and the bottom side 116 in the casing cavity 111) with a sintered powder body in this embodiment, but is not limited thereto. In specific implementation, the shell capillary structure 113 provided in the shell cavity 111 may be selected as a mesh body, a fiber body, a groove, a whisker, or any combination of the foregoing. The opening 112 penetrates the top side 115 of the housing 11 and communicates with the housing cavity 111. The opening 112 is shown as one opening 112 in this embodiment. In specific implementation, the number of the foregoing openings 112 may be one or More than one, and the number of the openings 112 is designed to match the number of the pipe bodies 31 (such as heat pipes). The pipe body 31 is shown as a heat pipe in this embodiment. The pipe 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 collectively defines a tube cavity 3111. The tube cavity 3111 is located between the open end 3112 and the closed end 3114 and communicates with the open end 3112. The open end 3112 of the tube 31 is directly connected to the opening 112 of the housing 11. Inside, and the outer side of the tube body 31 is tightly combined with the inner wall of the opening 112 facing the casing 11, the tube cavity 3111 communicates with the casing cavity 111 through the open end 3112, and the casing cavity 111 and The tube body cavity 3111 communicates, but is not limited thereto.
A connecting portion 3116 is integrally formed at the open end 3112. The connecting portion 3116 in the housing cavity 111 directly contacts the bottom side 116 of the housing 11 in the housing cavity 111, and the open end 3112 and A notch or opening shape is formed between the connecting portions 3116. The connecting portion 3116 is a part of the pipe body 31, and the inner side of the connecting portion 3116 is the inner side of the pipe body 31, so it is connected through the connecting portion 3116 of the pipe body 31. The bottom side 116 in the housing cavity 111 and the outer side of the pipe body 31 are in contact with the inner wall of the opening 112 to form a supporting structure for supporting the housing cavity 111, thereby making it unnecessary to provide the housing cavity 111. (Or not provided) there are supporting copper pillars connecting the top side 115 and the bottom side 116 to effectively achieve cost saving effects.
In addition, the axial capillary structure 41 is shown in this embodiment as a plurality of fiber threads (such as metal or non-metallic glass or carbon fiber or polymer fiber threads) twisted and wound to form a dense (or solid) axial capillary. Structure, and has excellent axial capillary force. However, in specific implementation, the axial capillary structure may be selected as a fiber bundle, a braid, a groove, or any of the foregoing plural combinations, and any capillary structure that can provide liquid working fluid to be transmitted only in the axial capillary, This is the axial capillary structure referred to in this creation, which was first combined by Chen Ming. The axial capillary structure 41 is disposed on the inner side of the tube body 31 and is distributed along the longitudinal direction (or axial direction) of the tube body 31 to directly abut the bottom of the casing in the casing cavity 111. On the side of the housing capillary structure 113, the axial capillary structure 41 in this embodiment uses a plurality of axial capillary structures 41 from the inner side of the pipe body 31 adjacent to the closed end 3114 to axially correspond to the corresponding connecting portion 3116. The axial capillary structure is connected to the shell 116 adjacent to the opening in the housing cavity 111 by directly contacting the bottom side 116 in the housing cavity 111 and the housing capillary structure 113 thereon. On the top side of the body, the shell capillary structure 113 is formed thereon, so the axial capillary structure 41 having the axial capillary effect is provided on the inner side of the pipe body cavity 3111 of the pipe body 31 in the longitudinal axis direction. After cooling, The working fluid (ie, liquid working fluid) will be quickly returned to the bottom side 116 of the housing cavity 111 in the axial direction by the axial capillary force of the axial capillary structures 41, thereby effectively achieving the directionality of the working fluid flow. And get better heat dissipation effect. In addition, since the axial capillary structure 41 provided axially through the tube body 31 serves as a capillary transmission path for providing liquid working fluid to be transmitted axially, the capillary transmission force for the liquid working fluid can be increased, and a better effect can be achieved. Capillary transmission effect. In one embodiment, the number of the axial capillary structures 41 can be adjusted by the user according to the heat dissipation requirements, the size of the tube body 31 and the capillary transmission efficiency, such as the tube cavity of the tube body 31. There is one axial capillary structure 41 or more than one axial capillary structure 41 on the inner side of 3111. In another embodiment, the axial capillary structure 41 is provided with a whisker structure or an oxide film (such as a hydrophilic film).
In an alternative embodiment, referring to FIG. 2D, the connecting portion 3116 of the pipe body 31 can be omitted, thereby increasing a space (or a vapor space) for the vapor-phase working fluid in the housing cavity 111 to flow. In another alternative embodiment, the top side 115 of the casing 11 in the casing chamber 111 and the upper capillary structure 113 thereon may be omitted, and only on the bottom side 116 of the casing 11 in the casing chamber 111. The housing capillary structure 113 is directly connected to the axial capillary structure 41.
An example is implemented as follows:
When the outer surface of the bottom side 116 of the casing 11 is mounted on an electronic device (such as a computer, a notebook computer, a smart mobile device or a communication device; not shown), a heating element (such as a central processing unit or MCU or other When the electronic component needs to be cooled, the bottom side 116 of the casing 11 will absorb a heat generated by the heating element, so that the bottom side 116 in the casing cavity 111 and the working fluid of the upper capillary structure 113 of the casing will be heated to evaporate. It is then converted into an evaporated working fluid (also called a vaporous working fluid), so that the evaporated working fluid will flow in the direction of the top side 115 in the housing cavity 111, and a part of the evaporated working fluid will also pass through the pipe body. The open end 3112 of 31 flows into the tube cavity 3111 until the evaporated working fluid condenses on the top side 115 in the casing cavity 111 and the closed end 3114 in the tube cavity 3111 and is converted into a cooled one. Working fluid (or liquid working fluid). At this time, the cooled working fluid on the closed end 3114 in the tube cavity 3111 is rapidly returned to the axis by the axial capillary force of the axial capillary structures 41. Bottom side in housing cavity 111 116 the capillary structure 113 on the casing, so that the working fluid is continuously vapor-liquid circulating in the casing cavity 111 and the tube cavity 3111 to effectively achieve better heat dissipation, better capillary transmission efficiency and improve heat transfer effectiveness.
In another alternative embodiment, referring to FIG. 2B, the pipe body 31 is provided with a pipe body capillary structure 313. The pipe body capillary structure 313 is shown as a powder sintered body in this alternative embodiment, but is not limited thereto. In specific implementation, the capillary body capillary structure 313 can be selected as a mesh body, a fiber body, a groove, a whisker, or any combination of the foregoing. The tubular capillary structure 313 is formed inside the tubular body cavity 3111 of the tubular body 31. The axial capillary structure 41 is provided on the inner side of the tubular body 31 on the surface of the tubular capillary structure 313 and connected to each other. And the tube capillary structure 313 located on the inside of the tube body 31 at the open end 3112 is in contact with the axial capillary structure 41 and connects the top side, the bottom side 115, 116 inside the housing cavity 111, and the housing capillary thereon. Structure 113. Through the axial capillary force of the axial capillary structures 41, a part of the cooled working fluid absorbed to the pipe capillary structure 313 is quickly returned to the bottom of the housing cavity 111 only in a specific direction as the axial direction. Side 116 has the capillary structure 113 on it, and the capillary force of the capillary structure 313 of the tube will return another part of the cooling working fluid in the axial direction and the radial direction to the bottom side 116 in the housing chamber 111 above it. During the process of the shell capillary structure 113, the radial capillary force of the pipe capillary structure 313 will also transmit the adsorbed and cooled working fluid to the adjacent corresponding axial capillary structure 41, so that the capillary transmission path of the working fluid can be transmitted through. Axial hair The uniaxial capillary transmission of the fine structure 41 can also be achieved by the axial and radial capillary transmission of the capillary structure 313 of the pipe body, so that a better capillary transmission effect can be achieved and the vapor-liquid circulation efficiency can be increased.
In another alternative embodiment, referring to FIG. 2C, the tube capillary structure 313 is redesigned on one or both sides of each axial capillary structure 41. The tube capillary structure 313 of this alternative embodiment is formed on each axis. To the inside of the tube body 31 on both sides of the capillary structure 41 (or between every two axial capillary structures 41), make the tube body capillary structure 313 contact and connect each of the axial capillaries on the inside of the adjacent tube body 31 One side of the structure 41, and the inner side of the pipe body 31 located at the open end 3112 is adjacent to each other in a staggered arrangement of the pipe body capillary structure 313 and the axial capillary structure 41 contacting and connecting the top and bottom sides 115 in the housing cavity 111 ， 116 The capillary structure 113 on the housing, so as to provide the capillary transmission path of the working fluid can be transmitted through the uniaxial capillary of the axial capillary structure 41, and also the axial and radial directions of the capillary structure 313 of the pipe body. Capillary transmission, thus making it possible to effectively achieve better capillary transmission effects and increase vapor-liquid circulation efficiency.
Therefore, through the design of the axial-capillary heat-dissipating unit, it is effective to achieve better capillary transmission effect and improve heat-dissipation efficiency.

11‧‧‧shell
111‧‧‧shell chamber
112‧‧‧ opening
113‧‧‧Capillary structure
115‧‧‧ Top side
116‧‧‧ bottom side
31‧‧‧ tube body
3111‧‧‧Tube body chamber
3112‧‧‧ open end
3114‧‧‧ Closed End
3116‧‧‧Connection Department
313‧‧‧Capillary capillary structure
41‧‧‧Axial capillary structure

FIG. 1 is a schematic diagram of three-dimensional decomposition of the first embodiment of the creation.
FIG. 2 is a schematic diagram of a three-dimensional combination of the first embodiment of the creation.
FIG. 2A is a schematic diagram of a combined cross section of the first embodiment of the creation.
FIG. 2B is a schematic diagram of a combined cross section of the first embodiment of the creation in another alternative embodiment.
FIG. 2C is a schematic diagram of a combined cross section of the first embodiment of the creation in another alternative embodiment.
FIG. 2D is a schematic diagram of a combined cross section of the first embodiment of the creation in an alternative embodiment.

Claims (9)

A heat dissipation unit with axial capillary includes:
A casing has a casing chamber and at least one opening, the casing chamber has a working fluid and a casing capillary structure formed in the casing chamber, and the at least one opening penetrates a top side of the casing and Communicating with the housing cavity; and at least one tube body having at least one axial capillary structure, an open end and a pair of closed ends that should be open ends, the open end and the closed end jointly defining a tube body cavity, and the open end is The at least one axial capillary structure is connected to the tube cavity and the housing cavity, and is arranged in the tube body, and is distributed along the longitudinal direction of the tube body. The open end of the tube body is connected to the at least one opening, and The axial capillary structure directly abuts the housing capillary structure on the bottom side of the housing in the housing cavity. The heat dissipating unit with an axial capillary according to item 1 of the scope of patent application, wherein the open end is integrally formed with a connecting portion directly contacting the bottom side of the housing cavity, and the axial capillary structure is adjacent to The closed end of the pipe body is formed by axially extending upwardly in the direction corresponding to the connecting portion. The heat dissipating unit with an axial capillary according to item 1 of the scope of the patent application, wherein the axial capillary structure is in contact with and connects the top of the casing on the top side of the casing adjacent to the at least one opening in the casing and the casing capillary thereon. structure. The heat dissipating unit with an axial capillary according to item 1 of the scope of the patent application, wherein the tube body is provided with a tube capillary structure, the tube capillary structure is formed inside the tube body, and the axial capillary structure is provided in the tube body. Inside the tube body, the surface of the capillary structure of the tube is in contact with each other, and the tube capillary structure located on the inside of the tube at the open end contacts the axial capillary structure to connect the bottom of the housing cavity. Capillary structure on the side. The heat dissipating unit with an axial capillary according to item 1 of the scope of the patent application, wherein the tube body is provided with a tube capillary structure, the tube capillary structure is formed inside the tube body, and the tube capillary structure contacts the connecting phase The axial capillary structure on the inner side of the pipe body adjacent to the inner side of the pipe body and the inner side of the pipe body adjacent to the inner side of the pipe body at the open end contact the axial capillary structure to connect the bottom side of the housing cavity with Capillary structure on the shell. The heat dissipating unit with an axial capillary according to item 1 of the scope of the patent application, wherein the casing is a temperature equalizing plate, a hot plate or a flat plate heat pipe. The heat dissipating unit with an axial capillary according to item 1 of the patent application scope, wherein the pipe body is a heat pipe. The heat dissipating unit with an axial capillary according to item 4 or 5 of the scope of the patent application, wherein the capillary structure of the tube body and the capillary structure of the housing are selected as a powder sintered body, a grid body, a fibrous body, and a groove. Slot, a whisker, or any combination of the foregoing. The heat dissipating unit with an axial capillary according to item 1 of the scope of the patent application, wherein the axial capillary structure is a fiber bundle, a fiber thread, a braid, a groove, or any combination of the foregoing.