Patent Application
20160334171
This application claims priority to Chinese Patent Application No. 201510247674.6 filed on May 15, 2015, the contents of which are incorporated by reference herein.
The subject matter herein generally relates to a heat dissipation device and a method of manufacturing the heat dissipation device.
In many circumstances, a heat pipe is assembled and fixed with a base by machines or tools, the machines or tools cause deformations or damages in the heat pipe or/and the base.
Implementations of the present technology will now be described, by way of example only, with reference to the attached figures.
It will be appreciated that for simplicity and clarity of illustration, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant feature being described. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts have been exaggerated to better illustrate details and features of the present disclosure. The description is not to be considered as limiting the scope of the embodiments described herein.
Referring to
The heat pipe 11 includes a pipe body 11a and a working medium 115 sealed in the pipe body 11a. The base 12 and the pipe body 11a are both made of metal. A melting point of the base 12 is lower than that of the pipe body 11a. If the melting point of the base 12 is larger than or equal to that of the pipe body 11a, the pipe body 11a could be melted by a molding material of the base in a method for the heat dissipation device in this application. The pipe body 11a includes a chamber 114. The chamber 114 is partially filled with the liquid working medium 115 accommodated therein, and the remaining space in the chamber 114 is a vacuum or partial vacuum (reduced pressure relative to ambient pressure). The working medium 115 is sealed in the chamber 114. The working medium 115 can be water or alcohol.
The heat pipe 11 has an evaporating section 111, a connecting section 112 and a condensing section 113. The connecting section 112 is connected between the evaporating section 111 and the condensing section 113. The chamber 114 is arranged through the evaporating section 111, the connecting section 112 and the condensing section 113. The evaporating section 111 directly attaches the base 12. The evaporating section 111 is assembled and fixed in the base 12. In at least one embodiment, the heat pipe 11 can be flat. The heat pipe 11 can be a curved structure.
In details, the heat pipe 11 can be an L-shaped structure. The evaporating section 111 can be a linear structure, the condensing section 113 can be a linear structure, and the connecting section 112 can be a curved structure.
The working medium 115 is employed to carry heat, under phase transitions between liquid state and vapor state, from the evaporating section 111 of the heat pipe 11 to the condensing section 113 thereof. In operation, the working medium 115 absorbs heat conducted from the base 12, becomes vaporized and moved away from the evaporating section 111. When the vaporized working medium 115 arrives at the condensing section 113, it condenses back to liquid and releases heat. The condensed working medium 115 is then pumped back to the evaporating section 111. The continuous cycle transfers large quantities of heat conducted from the base 12.
The chamber 114 of the pipe body 11a of the heat pipe 11 can include wick structures 116 received therein. The wick structures 116 can be formed by mesh structures, fibers or particles.
The base 12 includes a fixing portion 121 and a body portion 122. The fixing portion 121 and the body portion 122 define a receiving portion 123. The heat pipe 11 is received and assembled in the receiving portion 123. The fixing portion 121 and the body portion 122 can be a one-piece case. In at least one embodiment, the body portion 122 can be a plate shape. The fixing portion 121 can be a U shaped. A cross sectional view of the receiving portion 123 is a rectangular sharp. The heat pipe 11 can be received and penetrates through the receiving portion 123.
Referring to
in block 307, vacuumizing the chamber 114 of the tube 110; and in block 308, sealing the tail end 110b of the tube 110.
In “providing a tube 110, the tube 110 having a head end 110a, a tail end 110b and a chamber 114, the head end 110a being closed, the tail end 110b being opened, and the chamber 114 being connected outside via the tail end 110b”, the method can further include “checking air tightness of the tube 110”. In details, the head end 110a of the tube 110 can be checked its air tightness.
The tube 110 can include wick structures 116 received therein. The wick structures 116 can be formed by mesh structures, fibers or particles.
In this embodiment, the head end 110a of the tube 110 is received in the module 20, and the tail end 110b is positioned out of the module 20. In other embodiments, other parts of the tube 110 can be received in the module 20, and the tail end 110b is positioned out of the module 20.
The working medium 115 can be water or alcohol.
The tube 110 and the molding material 21 can be made of metal. The tube 110 can be made of copper. The molding material 21 can be made of aluminum or copper alloy.
After “removing the module 20”, the base 12 can be treated by a burring process.
After “removing the module 20”, the method can further include “checking air tightness of the tube 110”. In details, the head end 110a of the tube 110 can be checked its air tightness.
The “injecting a working medium 115 into the tube 110 via the tail end 110b” and “vacuumizing the chamber 114 of the tube 110” can be exchanged with each other.
After the tail end 110b of the tube 110 is sealed, the tube 110 is formed to a pipe body 11a of the heat pipe 11, and the tube 110 with the working medium 115 is formed to the heat pipe 11.
In using of the heat dissipation device 10 manufactured by the method, the heat pipe 11 directly attaches the base 12. Heat generated from an electrically element (not shown) is conducted to the base 12, and then directly conducted to the heat pipe 11.
The heat pipe 11 has an evaporating section 111, a connecting section 112 and a condensing section 113. The connecting section 112 is connected between the evaporating section 111 and the condensing section 113. The chamber 114 is arranged through the evaporating section 111, the connecting section 112 and the condensing section 113. The evaporating section 111 directly attaches the base 12. The evaporating section 111 is assembled and fixed in the base 12. In operation, the working medium 115 absorbs heat conducted from the base 12, becomes vaporized and moved away from the evaporating section 111. When the vaporized working medium 115 arrives at the condensing section 113, it condenses back to liquid and releases heat. The condensed working medium 115 is then pumped back to the evaporating section 111. The continuous cycle transfers large quantities of heat conducted from the base 12.
The base 12 includes a fixing portion 121 and a body portion 122. The fixing portion 121 and the body portion 122 define a receiving portion 123. The heat pipe 11 is received and assembled in the receiving portion 123. The fixing portion 121 and the body portion 122 can be a one-piece case. In at least one embodiment, the body portion 122 can be a plate shape. The fixing portion 121 can be a U-shaped structure. A cross sectional view of the receiving portion 123 is a rectangular. The heat pipe 11 can be received and penetrates through the receiving portion 123.
It is to be further understood that even though numerous characteristics and advantages have been set forth in the foregoing description of embodiments, together with details of the structures and functions of the embodiments, the disclosure is illustrative only; and that changes may be made in detail, including in matters of shape, size, and arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201510247674.6 | May 2015 | CN | national |
