US20070240481A1 - Method for manufacturing a heat pipe having an enlarged portion - Google Patents
Method for manufacturing a heat pipe having an enlarged portion Download PDFInfo
- Publication number
- US20070240481A1 US20070240481A1 US11/404,791 US40479106A US2007240481A1 US 20070240481 A1 US20070240481 A1 US 20070240481A1 US 40479106 A US40479106 A US 40479106A US 2007240481 A1 US2007240481 A1 US 2007240481A1
- Authority
- US
- United States
- Prior art keywords
- enlarged portion
- tubular material
- heat pipe
- manufacturing
- outer diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 49
- 238000007872 degassing Methods 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 238000005245 sintering Methods 0.000 claims description 2
- 238000009941 weaving Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/025—Stamping using rigid devices or tools for tubular articles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0283—Means for filling or sealing heat pipes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49353—Heat pipe device making
Definitions
- the present invention relates to a method for manufacturing a heat pipe having an enlarged portion. Especially, the present invention aims to manufacture a tubular heat pipe, thereby to increase the contacting area between the, heat pipe and a heat-conducting plate or an electronic heat-generating element.
- the condensed end thereof is usually connected to a plurality of heat-dissipating fins, and the heated end thereof is brought into contact with a heat-conducting plate or an electronic heat-generating element.
- the heated end should be brought into contact with the heat-conducting plate and the electronic heat-generating element as much as possible to increase the contacting area. Therefore, traditionally, the tubular heat pipe is directly made flattened by performing a pressing process for subsequent use.
- the outer diameter of the original heat pipe is 8 mm, the surface area of the flattened section after pressing is not large enough.
- the tubular heat pipe is preferable in terms of shape, there is still room for improvement.
- the inventor proposes the present invention to overcome the above problems based on his expert experiences and deliberate researches.
- the present invention is to provide a method for manufacturing a heat pipe having an enlarged portion, characterized in that: before being formed into a heat pipe, a hollow tubular material having a uniform outer diameter is formed with an enlarged portion having a larger outer diameter by narrowing or enlarging the tubular material; when the tubular material is filled with a working fluid and formed into a heat pipe after performing a degassing operation, the heat pipe is made to have an enlarged portion with a larger outer diameter; after pressing the heat pipe, a larger surface area can be obtained, so that the heat pipe is more suitable for contacting with the heat-conducting plate or the electronic heat-generating element.
- the present invention provides a method for manufacturing a heat pipe having an enlarged portion, comprising the steps of:
- FIG. 1 is a schematic flow chart of the present invention
- FIG. 2 is a schematic view of the first step of the present invention
- FIG. 3 is a schematic view of the second step of the present invention.
- FIG. 4 is a schematic view of the third step of the present invention.
- FIG. 5 is a schematic view of the fourth step of the present invention.
- FIG. 6 is a schematic view showing the operating state of the heat pipe manufactured by the present invention.
- FIG. 7 is a schematic view showing the operating state of another embodiment of the heat pipe manufactured by the present invention.
- FIG. 1 is a schematic flow chart of the present invention
- FIG. 6 is a schematic view showing the operating state of the heat pipe manufactured by the present invention.
- the present invention provides a method for manufacturing a heat pipe having an enlarged portion and comprises the, following steps.
- a plurality of heat-dissipating fins 2 is provided at one end of the heat pipe 1 obtained by the above procedure. Since the other end of the heat pipe is provided with the flattened enlarged portion 11 ′, the enlarged portion 11 ′ having a larger surface area can be brought into contact with the surface of a heat-conducting plate 3 , thereby to increase the contact area between the heat pipe 1 and the heat-conducting plate 3 .
- a plurality of the enlarged portions 11 ′ can be also provided.
- the condensed end thereof can be provided with the flattened enlarged portion 11 ′, thereby to increase the connecting area between the heat pipe 1 and the heat-dissipating fins 2 .
- the present invention indeed achieves the desired effects to overcome the drawbacks of prior art. Further, the present invention really involves the novelty and inventive steps, and conforms to the requirements for an invention patent.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
- 1. Field of the Invention
- The present invention relates to a method for manufacturing a heat pipe having an enlarged portion. Especially, the present invention aims to manufacture a tubular heat pipe, thereby to increase the contacting area between the, heat pipe and a heat-conducting plate or an electronic heat-generating element.
- 2. Description of Prior Art
- In a conventional tubular heat pipe, the condensed end thereof is usually connected to a plurality of heat-dissipating fins, and the heated end thereof is brought into contact with a heat-conducting plate or an electronic heat-generating element. In terms of the performance of heat transfer, the heated end should be brought into contact with the heat-conducting plate and the electronic heat-generating element as much as possible to increase the contacting area. Therefore, traditionally, the tubular heat pipe is directly made flattened by performing a pressing process for subsequent use. However, since in most cases the outer diameter of the original heat pipe is 8 mm, the surface area of the flattened section after pressing is not large enough. As a result, although the tubular heat pipe is preferable in terms of shape, there is still room for improvement.
- Therefore, in view of the above the drawbacks, the inventor proposes the present invention to overcome the above problems based on his expert experiences and deliberate researches.
- The present invention is to provide a method for manufacturing a heat pipe having an enlarged portion, characterized in that: before being formed into a heat pipe, a hollow tubular material having a uniform outer diameter is formed with an enlarged portion having a larger outer diameter by narrowing or enlarging the tubular material; when the tubular material is filled with a working fluid and formed into a heat pipe after performing a degassing operation, the heat pipe is made to have an enlarged portion with a larger outer diameter; after pressing the heat pipe, a larger surface area can be obtained, so that the heat pipe is more suitable for contacting with the heat-conducting plate or the electronic heat-generating element.
- In order to achieve the above object, the present invention provides a method for manufacturing a heat pipe having an enlarged portion, comprising the steps of:
-
- a) preparing a hollow tubular material having a uniform outer diameter;
- b) forming the tubular material with an enlarged portion having a larger outer diameter by narrowing or enlarging the tubular material, and arranging a capillary structure into the tubular material;
- c) filling a working fluid into the tubular material, and scaling the end of the tubular material to form a heat pipe after performing a degassing operation; and
- d) pressing the enlarged portion obtained in step b) to form a flattened enlarged portion on the heat pipe.
-
FIG. 1 is a schematic flow chart of the present invention; -
FIG. 2 is a schematic view of the first step of the present invention; -
FIG. 3 is a schematic view of the second step of the present invention; -
FIG. 4 is a schematic view of the third step of the present invention; -
FIG. 5 is a schematic view of the fourth step of the present invention; -
FIG. 6 is a schematic view showing the operating state of the heat pipe manufactured by the present invention; and -
FIG. 7 is a schematic view showing the operating state of another embodiment of the heat pipe manufactured by the present invention. - In order to make the Examiner more understanding the characteristics and the technical contents of the present invention, a detailed description will be made with reference to the accompanying drawings. However, it should be understood that the drawings are illustrative but not used to limit the scope of the present invention;
- With reference to
FIGS. 1 and 6 ,FIG. 1 is a schematic flow chart of the present invention, andFIG. 6 is a schematic view showing the operating state of the heat pipe manufactured by the present invention. The present invention provides a method for manufacturing a heat pipe having an enlarged portion and comprises the, following steps. -
- a) As shown in
FIG. 2 , a hollowtubular material 10 having a uniform outer diameter is prepared. Thetubular material 10 can be a copper pipe and formed into a pipe having a uniform outer diameter by drawing. Further, the drawn pipe is cut into sections according to the desired length. After washing and cleaning, a sampletubular material 10 is ready for the subsequent process. - b) As shown in
FIG. 3 , thetubular material 10 is formed with an enlargedportion 11 having a larger outer diameter by narrowing or enlarging the tubular material. A capillary structure is arranged into thetubular material 10. In this step, if the outer diameter of the heat pipe to be obtained by the narrowing process is 8 mm, the outer diameter of the sampletubular material 10 should be larger than 8 mm. Then, the outer diameter of most part of thetubular material 10 is narrowed to 8 mm via the narrowing process. As a result, the un-narrowed part of the tubular material is left to form an enlarged portion. Alternatively, if the outer diameter of the heat pipe to be obtained by enlarging process is 8 mm, the outer diameter of the sampletubular material 10 is exactly identical to 8 mm. The intended part of thetubular material 10 is subjected to the enlarging process to form an enlargedportion 11 having an outer diameter larger than 8 mm. Thecapillary stricture 12 arranged into thetubular material 10 maybe a mesh made by weaving wires or sintering powders. Incidentally, in this step, one end of thetubular material 10 should be firstly sealed and then subjected to the heat treatment for the next step. However, the sealing process and heat treatment of the tubular material is a well-known prior art, it does not fall into the scope of the present invention and thus the related description is omitted. - c) As shown in
FIG. 4 , a working fluid is filled into thetubular material 10, and the end of the tubular material is sealed to form aheat pipe 1 after performing a degassing operation. Before performing the degassing operation, the open end of thetubular material 10 is formed into a narrowedportion 13. Once the degassing operation is completed, the open end of the narrowedportion 13 is pressed and then a welding process is applied to seal the open end. As a result, awelded structure 14 is formed on the narrowedportion 13. - d) As shown in
FIG. 5 , a pressing process is applied to the enlarged portion obtained in step b) to form a flattened enlargedportion 11′ on theheat pipe 1. Since thetubular material 10 is made of steel material. With the high extensibility of the steel material, a forming tool can be used to flatten the enlargedportion 11 by rolling, so that the thus-rolled enlargedportion 11′ can has a larger surface area. Further, theentire heat pipe 1 can also be pressed if necessary (as shown inFIG. 7 ).
- a) As shown in
- Therefore, with the above procedure, the method for manufacturing a heat pipe having an enlarged portion according to the present invention can be carried out.
- Next, as shown in
FIG. 6 , a plurality of heat-dissipating fins 2 is provided at one end of theheat pipe 1 obtained by the above procedure. Since the other end of the heat pipe is provided with the flattened enlargedportion 11′, the enlargedportion 11′ having a larger surface area can be brought into contact with the surface of a heat-conductingplate 3, thereby to increase the contact area between theheat pipe 1 and the heat-conductingplate 3. - Further, as shown in
FIG. 7 , a plurality of the enlargedportions 11′ can be also provided. For example, in addition to the heated end of theheat pipe 1, the condensed end thereof can be provided with the flattened enlargedportion 11′, thereby to increase the connecting area between theheat pipe 1 and the heat-dissipating fins 2. - According to the above, the present invention indeed achieves the desired effects to overcome the drawbacks of prior art. Further, the present invention really involves the novelty and inventive steps, and conforms to the requirements for an invention patent.
- Although the present invention has been described with reference to the foregoing preferred embodiments, it will be understood that the invention is not limited to the details thereof. Various equivalent variations and modifications can still be occurred 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 (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/404,791 US7275409B1 (en) | 2006-04-17 | 2006-04-17 | Method for manufacturing a heat pipe having an enlarged portion |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/404,791 US7275409B1 (en) | 2006-04-17 | 2006-04-17 | Method for manufacturing a heat pipe having an enlarged portion |
Publications (2)
Publication Number | Publication Date |
---|---|
US7275409B1 US7275409B1 (en) | 2007-10-02 |
US20070240481A1 true US20070240481A1 (en) | 2007-10-18 |
Family
ID=38535674
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/404,791 Expired - Fee Related US7275409B1 (en) | 2006-04-17 | 2006-04-17 | Method for manufacturing a heat pipe having an enlarged portion |
Country Status (1)
Country | Link |
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US (1) | US7275409B1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140345137A1 (en) * | 2011-03-10 | 2014-11-27 | Cooler Master Development Corporation | Method for manufacturing flat heat pipe with sectional differences |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9816612B2 (en) * | 2015-03-25 | 2017-11-14 | Elkhart Products Corporation | Hollow piston |
CN111780599A (en) * | 2020-06-08 | 2020-10-16 | 华南理工大学 | Packaging method of high-temperature heat pipe |
US20200391266A1 (en) * | 2020-08-28 | 2020-12-17 | Intel Corporation | Extruded heat pipe |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3680189A (en) * | 1970-12-09 | 1972-08-01 | Noren Products Inc | Method of forming a heat pipe |
US20050235494A1 (en) * | 2004-04-23 | 2005-10-27 | Ming-Te Chuang | Heat pipe and manufacturing method thereof |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0610589B2 (en) * | 1988-01-14 | 1994-02-09 | 古河電気工業株式会社 | Manufacturing method of small diameter stepped heat pipe |
-
2006
- 2006-04-17 US US11/404,791 patent/US7275409B1/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3680189A (en) * | 1970-12-09 | 1972-08-01 | Noren Products Inc | Method of forming a heat pipe |
US20050235494A1 (en) * | 2004-04-23 | 2005-10-27 | Ming-Te Chuang | Heat pipe and manufacturing method thereof |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140345137A1 (en) * | 2011-03-10 | 2014-11-27 | Cooler Master Development Corporation | Method for manufacturing flat heat pipe with sectional differences |
Also Published As
Publication number | Publication date |
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US7275409B1 (en) | 2007-10-02 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: CHAUN-CHOUNG TECHNOLOGY CORP., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WU, CHUNG;HUANG, MENG-CHENG;WANG, TONY;REEL/FRAME:017795/0433 Effective date: 20060314 |
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STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
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Year of fee payment: 8 |
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FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
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LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY |
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STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
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FP | Expired due to failure to pay maintenance fee |
Effective date: 20191002 |