FLAT MESH WICK STRUCTURE OF ULTRATHIN HEAT PIPE AND ULTRATHIN HEAT PIPE HAVING THE SAME
A flat mesh wick structure of an ultrathin heat pipe and an ultrathin heat pipe having the same are provided in the present disclosure. The mesh wick structure is included of a plurality of braided wires, and each of the braided wires is included of a plurality of intercrossed segments arranged at interval and a plurality of connecting segments connected between the adjacent intercrossed segments, wherein the intercrossed segment of each braided wire is of a flat shape. The flat mesh wick structure is constituted thereby.
The present disclosure is related to a screen mesh wick structure, and particularly a flat mesh wick structure of an ultrathin heat pipe and an ultrathin heat pipe having the same.
DESCRIPTION OF RELATED ARTThe majority of current 3C electronic products are designed to be compact, and heat pipes arranged therein are accordingly compact. Therefore, ultrathin heat pipes (thickness less than 1.5 mm) are engineered for this requirement.
However, thin wick structures have to be arranged in the ultrathin heat pipe, as a result of the slim ultrathin heat pipe. Otherwise, the ultrathin heat pipe does not contain enough inner space to form a vapor channel. A related art ultrathin heat pipe shown in
If the wick structure 2a is arranged in the tube 1a as a cylinder and attached on the internal surface of the tube, the tube 1a will be choked by the wick structure 2a, and there will be no redundant space to form a vapor channel allowing a vapored working fluid flowing therein. Therefore, the ultrathin heat pipe is not able to transfer heat.
If the wick structure 2a is arranged in the tube 1a and attached on both of the bottom wall 10a and the upper wall 11a, a vapor channel with a height (H-t) less than 0.1 mm is formed in the tube 1a. That results to high flow drag and steep gradient of temperature, and only a poor heat transfer performance of the ultrathin heat pipe is achieved as well.
In views of this, in order to solve the above disadvantage, the present inventor studied related technology and provided a reasonable and effective solution in the present disclosure.
SUMMARYA main purpose of the present disclosure is providing a flat mesh wick structure of ultrathin heat pipe and an ultrathin heat pipe having the same. A braded mesh wick structure is squeezed to form a flat shape, and the flat mesh wick structure is formed thereby. The flat mesh wick structure is applied to be arranged at bilateral or as a stake in the ultrathin heat pipe, and a wick transfer performance of the ultrathin heat pipe is thereby enhance.
Another purpose of the present disclosure is providing a flat mesh wick structure of ultrathin heat pipe and ultrathin heat pipe having the same. The flat mesh wick structure is able to enlarge contacting area with the internal surface of the tube. Compared with non-squeezed mesh wick structure having contact points with the internal surface of a flat tube, the flat mesh wick structure has contact plates with the internal surface of the flat tube is more fit with internal surface of the flat tube. Thereby, less thermal resistance and fewer apertures are produced between the flat mesh wick structure and the internal surface of the flat tube. Therefore, the flat mesh wick structure has better wicking performance than that conventional.
Another purpose of the present disclosure is providing a flat mesh wick structure of ultrathin heat pipe and ultrathin heat pipe having the same. Owning to be squeezed, the flat mesh wick structure is reinforced. Thereby, the flat mesh wick structure is liable to be located in the flat tube. In order to accomplish the above purpose, a flat mesh wick structure of an ultrathin heat pipe is provided in the present invention. The flat mesh wick structure is included of a plurality of braided wires. Each of the braided wire is included of a plurality of intercrossed segments arranged at interval and a plurality of connecting segments connected between the adjacent intercrossed segments. The intercrossed segment of each braided wire is of a flat shape.
In order to accomplish the above purpose, an ultrathin heat pipe is provided in the present invention. The ultrathin heat pipe is included of a flat tube and the flat mesh wick structure mentioned above. The flat tube is included a vapor channel therein, and the flat mesh wick structure is arranged in the vapor channel of the flat tube.
Please refer to enclosed figures and specification of the present disclosure to understand features and technological content thereof. However, the figures and specification are not limitations of the present disclosure.
Please refer to
Each of the braided wires (10, 10′) is of a strip shape and includes a plurality of intercrossed segments (11, 11′) arranged at interval and a plurality of connecting segments (12, 12′) connected between the adjacent intercrossed segments (11, 11′). The braided wires (10, 10′) are braided to form the mesh wick structure (1), and then the mesh wick structure (1) is squeezed to form a flat external surface (110, 110′) on each intercrossed segment (11, 11′) of each braided wire (10, 10′). Please further refer to
Thereby, the flat mesh wick structure of ultrathin heat pipe and the ultrathin heat pipe having the same of the present disclosure can be thus realized.
The above mesh wick structure (1) is arranged in a flat tube (2) of the ultrathin heat pipe. The flat tube (2) includes a bottom wall (20), an upper wall (21) opposite to the bottom wall (20) and arranged at interval with the bottom wall (20), and a two lateral walls (22) connected between the bottom wall (20) and the upper wall (21). A vapor channel (23) is formed in the flat tube (2) by the bottom wall (20), the upper wall (21) and the lateral walls (22). Because the mesh wick structure (1) is squeezed to be less the 0.05 mm and attached on an internal surface of the bottom wall (20), a redundant space with at least 0.15 mm height (h) can be reserved in the flat tube (2) while the thickness of the flat tube (2) is kept to be 0.4 mm. Therefore, an internal space of the vapor channel (23) with sufficient height is provided to allow vapor flows smoothly therein. Moreover, the vapor channel (23) can be formed with another mesh wick structure (not be shown in figures) being attached on the internal surface of the upper wall (21) or with the mesh wick structure (1) being arranged at a stack (not be shown in figures).
Furthermore, because the vapor channel (23) could be formed with a sufficient height, the mesh wick structure (1) can further be combined with another supporting or wick structure (such as sintered powder, mesh, fiber or the combinations thereof) as shown in
Therefore, the flat mesh wick structure of ultrathin heat pipe and the ultrathin heat pipe having the same of the present disclosure have at least below advantages resulting to a better performance of the ultrathin heat pipe.
1. The flat mesh wick structure is able to reserve sufficient space in the vapor channel 23 of the ultrathin heat pipe to allow the working fluid flowing therein or the arrangement of another wick structure therein.
2. There are more contact area formed between the mesh wick structure (1) and the flat tube (2) owning to the squeezed braided wires (10, 10′). Compared with the contact points between related art braided wires and the flat tube (2), the squeezed braided wires (10, 10′) can be attached on the flat tube (2) more compactly. Thereby, less thermal resistance and more capillary force are achieved in the ultrathin heat pipe.
3. The squeezed braided wire (10, 10′) is firmer than the non-squeezed one. Thereby, the mesh wick structure (1) is reinforced, and more easily arranged into the flat tube (2).
Although the present invention has been described with reference to the foregoing preferred embodiment, it will be understood that the invention is not limited to the details thereof. Various equivalent variations and modifications can still occur to those skilled in this art in view of the teachings of the present invention. Thus, all such variations and equivalent modifications are also embraced within the scope of the invention as defined in the appended claims.
Claims
1. A flat mesh wick structure of an ultrathin heat pipe, the flat mesh wick structure comprising:
- a plurality of braided wires, each of the braided wires comprising a plurality of intercrossed segments arranged at interval and a plurality of connecting segments connected between the adjacent intercrossed segments;
- wherein each intercrossed segment of each braided wire is of a flat shape.
2. The flat mesh wick structure of an ultrathin heat pipe according to claim 1, wherein a flat external surface is formed on the intercrossed segment of each braided wire.
3. The flat mesh wick structure of an ultrathin heat pipe according to claim 2, wherein a flat intercrossed surface is formed on the intercrossed segment of each braided wire, and the intercrossed surfaces are arranged opposite to the external surfaces.
4. The flat mesh wick structure of an ultrathin heat pipe according to claim 3, wherein the braided wires are respectively arranged along a first direction and a second direction to intercross with each other, and the intercrossed surfaces of any two intercrossed braided wires are attached to each other.
5. The flat mesh wick structure of an ultrathin heat pipe according to claim 4, wherein an interval between the external surfaces of two intercrossed braided wires is less than 0.05 mm.
6. An ultrathin heat pipe, comprising:
- a flat tube having a vapor channel therein; and
- a mesh wick structure arranged in the vapor channel of the flat tube and comprising a plurality of braided wires, each of the braided wires comprising a plurality of intercrossed segments arranged at interval and a plurality of connecting segments connected between the adjacent intercrossed segments;
- wherein the intercrossed segment of each braided wire is of a flat shape.
7. The ultrathin heat pipe according to claim 6, wherein a flat external surface is formed on the intercrossed segment of each braided wire.
8. The ultrathin heat pipe according to claim 7, wherein a flat intercrossed surface is formed on the intercrossed segment of each braided wire, and the intercrossed surfaces are arranged opposite to the external surfaces.
9. The ultrathin heat pipe according to claim 8, wherein the braided wires are arranged along a first direction and a second direction to intercross with each other, and the intercrossed surfaces of any two intercrossed braided wires are attached to each other.
10. The ultrathin heat pipe according to claim 9, wherein the interval between the external surfaces of two intercrossed braided wires is less than 0.05 mm.
11. The ultrathin heat pipe according to claim 10, wherein the flat tube is comprised of a bottom wall, an upper wall arranged opposite to and at interval with the bottom wall, and two lateral walls connected between the bottom wall and the upper wall, the vapor channel is surrounded and formed thereby.
12. The ultrathin heat pipe according to claim 11, wherein the mesh wick structure is attached on an internal surface of the bottom wall.
13. The ultrathin heat pipe according to claim 12, wherein the mesh wick structure is comprised of at least one supporting wick structure, the supporting wick structure is arranged on the mesh wick structure, and the supporting wick structure is contacted only a part of the mesh wick structure and the upper wall.
14. The ultrathin heat pipe according to claim 13, wherein the supporting wick structure is made of at least one of the group consisted of sintered powder, mesh and fiber.
15. The ultrathin heat pipe according to claim 12, wherein only a part in the flat tube is occupied by the mesh wick structure.
Type: Application
Filed: Feb 13, 2014
Publication Date: Jun 25, 2015
Inventor: Hao PAI (Taoyuan County)
Application Number: 14/180,185