FLAT HEAT PIPE WITH MULTI-PASSAGE SINTERED CAPILLARY STRUCTURE
The flat heat pipe with multi-passage sintered capillary structure includes a flat pipe, which is a hollow pipe with a flat cross section and two sealed ends. Two flat surfaces and two lateral parts are defined. The flat pipe forms a heating section and a cooling section. A hollow chase is formed within the flat pipe. The sintered capillary structure is prefabricated into the hollow chase and is provided with at least two coupling sides for mating with two flat surfaces of the flat pipe. At least two flow passages are formed at intervals onto a preset location of the sintered capillary structure and arranged along the extension direction of the flat pipe.
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BACKGROUND OF THE INVENTION1. Field of the Invention
The present invention relates generally to a heat pipe, and more particularly to an innovative heat pipe with a multi-passage sintered capillary structure.
2. Description of Related Art Including Information Disclosed Under 37 CFR 1.97 and 37 CFR 1.98.
With continuous improvement in the performance of computers, heat-radiating components of higher performance are required. So, the development of the heat pipe in heat-radiating components is of paramount significance.
In a heat pipe structure, the working fluid is guided rapidly by capillary structure from the cooling end to the heating end. On the other hand, a hollow passage is used to quickly guide vaporized working fluid from the heating end to the cooling end. Thus, the key to this technology is the capillary structure and flow passage.
Currently, the capillary structure in a heat pipe is generally divided into a wire mesh, a powder sintered body and a groove. As for the wire mesh, the complicated manufacturing process requires processing the wire mesh into rolls and then plugging the wire mesh into the heat pipe, thus leading to higher manufacturing costs. Moreover, a gap exists between the wire mesh and heat pipe, so the heat flow in the passage may be blocked at the bending section, leading to degraded heat-insulating performance. The typical powder sintered body faces the same disadvantages as those for the aforementioned wire mesh. The powder sintered bodies are regularly distributed onto the inner wall of heat pipe to define a single passage. However, it is found that the single-passage space or capillary structure (powder sintered body) cannot help to improve the heat-radiating efficiency.
Thus, to overcome the aforementioned problems of the prior art, it would be an advancement in the art to provide an improved structure that can significantly improve efficacy.
Therefore, the inventor has provided the present invention of practicability after deliberate design and evaluation based on years of experience in the production, development and design of related products.
BRIEF SUMMARY OF THE INVENTIONThe sintered capillary structure is prefabricated into a hollow chase of the flat pipe, so the objects to be sintered are placed into the flat pipe. Some core materials are combined to form a flat heat pipe with the multiple-passage sintered capillary structure, presenting simple manufacturing and cost-effectiveness.
Based on the structural feature that the sintered capillary structure is provided with at least two coupling sides for mating with two flat surfaces of the flat pipe, an excellent heat transfer effect could be achieved between the sintered capillary structure and flat pipe. The flat pipe could be supported more stably by the sintered capillary structure. Moreover, when the flat pipe is bent, the sintered capillary structure could bend accordingly to ensure smooth flow in the passage. Any flat surface of the flat pipe could contact the heat-radiating object for heat transfer, thus improving the flexibility of installation and preventing error of installation with improved applicability.
Based on the feature that the sintered capillary structure is provided at least with two flow passages, the vaporization space of the flow passage and guide area could be expanded to improve greatly the heat transfer and radiation effect of the flat heat pipe.
As a space is shaped between the sintered capillary structure and one end of the cooling section, the flow passage is provided with connecting space at the end. Thus, when the working fluid in flow passage is vaporized at different rates, the connecting space W2 could assist in achieving uniform temperature and improving the heat-radiation efficiency.
Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.
The features and the advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.
The flat heat pipe comprises a flat pipe 10, which is a hollow pipe with a flat cross section and two sealed ends, defining two flat surfaces 11 and two lateral parts 12. The flat pipe 10 comprises a heating section 13 and a cooling section 14. A hollow chase 15 is formed within the flat pipe. The heating section 13 can be located at the end or middle section of the flat pipe 10, and the cooling section 14 at one or two ends of the flat pipe 10.
A sintered capillary structure 20 is made of metal powder or grains. The sintered capillary structure 20 is prefabricated into a hollow chase 15 of the flat pipe 10 and is provided at least with two coupling sides 21 for mating with two flat surfaces 11 of the flat pipe 10.
At least two flow passages 30 are formed at intervals onto preset locations of the sintered capillary structure 20 and arranged along the extension direction of flat pipe 10.
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Said flow passage 30 is also formed between the sintered capillary structure 20 and lateral part 12 and/or flat surface 11 of the flat pipe 10. Referring to
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The flat heat pipe of the present invention is shown in
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Claims
1. A flat heat pipe with multi-passage sintered capillary structure, comprising:
- a flat pipe, being hollow and having a flat cross section and two sealed ends, defining two flat surfaces and two lateral parts, said flat pipe having a heating section and a cooling section, and a hollow chase formed therein;
- a sintered capillary structure, being prefabricated into a hollow chase of said flat pipe, said sintered capillary structure being provided with at least two coupling sides mated with said two flat surfaces of said flat pipe; and
- at least two flow passages, formed at intervals onto a preset location of said sintered capillary structure and arranged along an extension direction of said flat pipe.
2. The flat heat pipe defined in claim 1, wherein the circumference of sintered capillary structure is filled into the inner wall of hollow chase of the flat pipe.
3. The flat heat pipe defined in claim 1, wherein said flow passages are formed within said sintered capillary structure.
4. The flat heat pipe defined in claim 1, wherein said flow passages are formed between said sintered capillary structure and a flat surface of said flat pipe.
5. The flat heat pipe defined in claim 1, wherein said flow passage is provided with a mesh body or porous components.
6. The flat heat pipe defined in claim 1, wherein said flat piper further comprises grooves formed on an inner wall of said hollow chase of said flat pipe.
7. The flat heat pipe defined in claim 1, further comprising:
- a space shaped between said sintered capillary structure and one end of the cooling section, said flow passage being provided with a connecting space at an end thereof.
Type: Application
Filed: Dec 3, 2007
Publication Date: Jun 4, 2009
Applicant: FORCECON TECHNOLOGY Co., Ltd. (Chu Pei City)
Inventors: Ming-Cyuan SHIH (Jhubei City), Sin-Wei He (Jhudong Township)
Application Number: 11/949,684
International Classification: F28D 15/04 (20060101);