US20040231830A1 - Heat pipe - Google Patents
Heat pipe Download PDFInfo
- Publication number
- US20040231830A1 US20040231830A1 US10/684,111 US68411103A US2004231830A1 US 20040231830 A1 US20040231830 A1 US 20040231830A1 US 68411103 A US68411103 A US 68411103A US 2004231830 A1 US2004231830 A1 US 2004231830A1
- Authority
- US
- United States
- Prior art keywords
- heat
- heat pipe
- inner chamber
- fluid
- peripheral wall
- 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
Images
Classifications
-
- 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
- F28D15/04—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 with tubes having a capillary structure
-
- 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
Definitions
- the invention relates to a heat pipe, more particularly to a heat pipe that can transfer heat quickly.
- FIGS. 1 to 4 illustrate a method for producing a conventional heat pipe 1 that is suitable for dissipating heat from electronic components.
- the method includes the steps of providing a metallic tubular body 11 with an open end portion 111 and a peripheral wall 112 defining an inner chamber 113 , introducing a suitable amount of heat transfer liquid 13 into the tubular body 11 using a filling device 12 , evacuating the inner chamber 113 of the tubular body 11 , pinching the open end portion 111 of the tubular body 11 by means of a machine tool 5 (see FIG. 2) so as to close the open end portion 111 and so as to form a flattened sealing portion 114 (see FIG. 2), cutting a top end section 1141 of the flattened sealing portion 114 by means of a cutting machine 3 (see FIG. 3), and sealing the heat pipe 1 by a spot welding process.
- a welding spot, represented by numeral 14 is shown in FIG. 4.
- the aforementioned flattened sealing portion 114 of the heat pipe 1 is easily broken due to an external force, thereby resulting in leakage of the heat pipe 1 . Furthermore, the flattened sealing portion 114 increases the length of the heat pipe 1 such that the latter has a relatively large volume. Moreover, since the liquid 13 is first introduced into the tubular body 11 followed by the evacuation process, it is possible that some of the liquid 13 will be drawn out such that the quantity of the liquid 13 in the tubular body 11 and the quality of the heat pipe 1 cannot be accurately controlled. Additionally, the method for producing the conventional heat pipe 1 is somewhat complicated.
- heat dissipation of the conventional heat pipe 1 involves stimulating the liquid 13 in the tubular body 11 through the rising temperature of the heat source 2 , such as an integrated circuit, so that the liquid 13 gradually absorbs the heat and vaporizes, as shown by upward arrows in FIG. 4.
- the vaporized liquid exchanges heat with the external air through convection and then condenses into liquid, thereby achieving absorption and dissipation of heat from the heat source 2 .
- the object of the present invention is to provide a heat pipe that is capable of overcoming the aforementioned drawbacks of the prior art.
- a heat pipe comprises a tubular body, a heat transfer fluid, and a heat sink member.
- the tubular body has opposite bottom and top ends, a peripheral wall between the bottom and top ends, and an inner chamber defined by the bottom and top ends and the peripheral wall.
- the heat transfer fluid is disposed in the inner chamber.
- the heat sink member closes the bottom end, and has a bottom face adapted to contact a heat source.
- the heat sink member further has a top face directed toward the inner chamber. The top face is indented downwardly to define a fluid accumulating portion.
- the heat transfer fluid in the fluid accumulating portion absorbs heat from the heat source and vaporizes to carry heat away from the heat source.
- FIG. 1 is a fragmentary sectional view of a conventional heat pipe, illustrating how a heat transfer liquid is introduced into the heat pipe using a filling device;
- FIG. 2 is another fragmentary sectional view of the conventional heat pipe, illustrating the pinching of an open end portion of the heat pipe by a machine tool to form a flattened sealing portion;
- FIG. 3 is yet another fragmentary sectional view of the conventional heat pipe, illustrating the flattened sealing portion after being cut by a cutting machine;
- FIG. 4 is a further fragmentary sectional view of the conventional heat pipe, illustrating the heat pipe after being sealed by a spot welding process;
- FIG. 5 is an exploded perspective view of the first preferred embodiment of a heat pipe according to the present invention.
- FIG. 6 is a sectional view of the first preferred embodiment in an assembled state
- FIG. 7 is a sectional view to illustrate the tubular body of the heat pipe of the first preferred embodiment when sealed
- FIG. 8 is a sectional view of the second preferred embodiment of a heat pipe according to the present invention.
- FIG. 9 is the same view as FIG. 8, but with a resin cured in a filling hole to form a securing member
- FIG. 10 is the same view as FIG. 9, but with a fluid introduced into the tubular body through a needle;
- FIG. 11 is the same view as FIG. 10, after being sealed with a sealant
- FIG. 12 is an exploded perspective view of the third preferred embodiment of a heat pipe according to the present invention.
- FIG. 13 is a sectional view of the third preferred embodiment in an assembled state
- FIG. 14 is a sectional view of the fourth preferred embodiment of a heat pipe according to the present invention.
- FIG. 15 is a fragmentary sectional view of the fifth preferred embodiment of a heat pipe according to the present invention.
- the first preferred embodiment of a heat pipe 3 is shown to comprise a heat sink member 5 , a metallic tubular body 6 , a heat transfer fluid 7 (see FIG. 6), a cover member 8 , an elastic sealing member 9 , and a securing member 100 .
- the heat sink member 5 is made of a highly heat conductive metal, such as aluminum, copper, or an alloy.
- the heat sink member 5 has a bottom face 50 adapted to contact a heat source 4 (see FIG. 6), and a top face 51 opposite to the bottom face 50 and indented downwardly or concaved to define a fluid accumulating portion 52 .
- the top face 51 has a central part 511 and a peripheral end 512 surrounding the central part 511 , and is indented from the peripheral end 512 to the central part 511 so that the heat sink member 5 decreases in thickness from the peripheral end 512 to the central part 511 .
- the fluid accumulating portion 52 includes a central fluid accumulating cavity 521 , and a plurality of channels 522 extending outwardly from the cavity 521 .
- the heat sink member 5 Since the indented top face 51 formed with the cavity 521 and the channels 522 provides a greater contact surface with the fluid 7 as compared with the flat bottom of the aforesaid conventional heat pipe 1 , the heat sink member 5 is more efficient for heat transfer than the flat bottom of the conventional heat pipe 1 . In addition, as the heat sink member 5 is thin at the central part 511 , the rate of heat transfer from the heat source 4 to the fluid 7 through the heat sink member 5 can be increased as compared with the flat bottom of the conventional heat pipe 1 that has a constant thickness.
- the tubular body 6 has a bottom end 61 sleeved fixedly on the heat sink member 5 so that the heat sink member 5 closes the bottom end 61 , a top end 62 opposite to and in fluid communication with the bottom end 61 , a peripheral wall 63 (see FIG. 6) between the bottom and top ends 61 , 62 , and an inner chamber 64 defined by the bottom and top ends 61 , 62 and the peripheral wall 63 .
- the top face 51 of the heat sink member 5 is directed toward the inner chamber 64 .
- the heat sink member 5 further has a peripheral face extending between the top and bottom faces 51 , 50 and engaging an inner surface 631 of the peripheral wall 63 of the tubular body 6 at the bottom end 61 of the tubular body 6 .
- the peripheral face is recessed to form a peripheral groove 54 , and has a first braze metal wire 130 which is received in the groove 54 and which is fused to join the heat sink member 5 to the tubular body 6 .
- the heat transfer fluid 7 is disposed in the inner chamber 64 , and can be accumulated in the fluid accumulating cavity 52 in the heat sink member 5 .
- the fluid 7 can be water, ammonia, or any other liquid that can vaporize when heated and that can condense when cooled.
- the heat transfer fluid 7 in the fluid accumulating portion 52 absorbs heat from the heat source 4 and vaporizes to carry heat away from the heat source 4 .
- the cover member 8 is mounted fixedly on and covers the top end 62 of the tubular body 6 , and has an inner side 85 (see FIG. 6) facing the inner chamber 64 , an outer side 81 opposite to the inner side 85 , and a filling hole 82 formed in the cover member 8 , in fluid communication with the inner chamber 64 , and extending through the outer side 81 .
- the filling hole 82 is formed as a blind hole 83 which opens at the outer side 81 and which has a closed end 831 (see FIG. 6) adjacent to the inner side 85 .
- the cover member 8 further has a seat part 86 (see FIG. 6) at the inner side 85 to bound the closed end 831 .
- the seat part 86 has a first needle hole 861 extending through the inner side 85 and communicated with the blind hole 83 .
- the blind hole 83 has a cross-section, which is gradually reduced from the outer side 81 to the inner side 85 .
- the cover member 8 further has a peripheral face extending between the outer and inner sides 81 , 85 and engaging the inner surface 631 of the peripheral wall 63 of the tubular body 6 at the top end 62 of the tubular body 6 .
- the peripheral face of the cover member 8 is recessed to form a peripheral groove 84 , and has a second braze metal wire 130 ′ that is received in the groove 84 in the cover member 8 and that is fused to join the cover member 8 to the tubular body 6 .
- the elastic sealing member 9 is a cured sealing block fitted within the filling hole 82 , and is made of an elastic material, such as a rubber or a silicone elastomer.
- the sealing member 9 is pierceable to provide a passage (not shown) for injection of the heat transfer fluid 7 through the sealing member 9 , and is contractible to seal the passage.
- the securing member 100 is fitted sealingly into the blind hole 83 and outwardly of the sealing member 9 by means of a tool (not shown) so as to press the sealing member 9 against the seat part 86 so that the outer surface 101 of the securing member 100 is flush with the outer side 81 of the cover member 8 , as shown by the straight line (L) in FIG. 7, thereby sealing the first needle hole 861 and preventing air from entering the inner chamber 64 in the tubular body 6 .
- the securing member 100 has a shape in conformity with that of the blind hole 83 , a second needle hole 102 in alignment with the first needle hole 861 in the cover member 8 , and an insert piece 120 (see FIG. 7) disposed sealingly in the second needle hole 102 .
- the insert piece 120 may be a welding spot formed by a spot welding machine (not shown), or a sealant.
- the needle 110 is extended into the inner chamber 64 in the tubular body 6 by passing through the second needle hole 102 in the securing member 100 , the sealing member 9 , and the first needle hole 861 in the seat part 86 of the cover member 8 .
- the needle 110 is connected to a controlling unit (not shown), which operates to subsequently evacuate air from within the inner chamber 64 and to introduce a predetermined amount of the heat transfer fluid 7 into the inner chamber 64 .
- the sealing member 9 because of its elasticity, contracts to seal the passage in the sealing member 9 .
- the insert piece 120 is used to seal the second needle hole 102 .
- the heat sink member 5 and the cover member 8 can be fitted sealingly and respectively to the bottom and top ends 61 , 62 of the tubular body 6 by a machine tool (not shown), or can be threadedly engaged to the peripheral wall 63 of the tubular body 6 .
- the heat transfer fluid 7 in the fluid accumulating portion 52 of the heat sink member 5 vaporizes quickly, as shown by upward arrows in FIG. 7, because of the indented configuration of the top face 51 of the heat sink member 5 . Then, the vaporized fluid exchanges heat with the external air by convection and thus condenses and flows downward, as shown by downward arrows in FIG. 7.
- the heat pipe 3 of the present invention does not have to undergo the processes of pinching and cutting prior to sealing, has an outer appearance that is not easily broken by an external force, and a length that is shorter than that of the aforesaid conventional heat pipe 1 so that it does not occupy a relatively large amount of space. Moreover, the amount of the heat transfer fluid 7 filled in the tubular body 6 can be controlled accurately using simple processing equipment so that working quality of the heat pipe 3 of the present invention can be effectively ensured.
- the second preferred embodiment of the heat pipe 3 according to the present invention is shown to be substantially similar to the first preferred embodiment.
- the securing member 100 ′ is provided by introducing a curable resin 150 into the blind hole 83 through a sealing machine 140 . After the resin 150 is cured, the resulting securing member 100 ′ is retained sealingly in the blind hole 83 , and abuts sealingly against the sealing member 9 so as to press the sealing member 9 against the seat part 86 .
- the needle 110 is extended into the inner chamber 64 in the tubular body 6 by passing through the securing member 100 ′, the sealing member 9 , and the first needle hole 861 in the seat part 86 of the cover member 8 to subsequently evacuate air from within the inner chamber 64 and to introduce the heat transfer fluid 7 into the inner chamber 64 .
- the securing member 100 ′ and the sealing member 9 because of their elastic characteristics, contract to seal the passages (not shown) in the securing member 100 ′ and the sealing member 9 , after which a layer of sealant 160 is disposed sealingly and outwardly of the securing member 100 ′, thereby preventing air from entering the inner chamber 64 in the tubular body 6 .
- the third preferred embodiment of the heat pipe 3 according to the present invention is shown to be substantially similar to the first preferred embodiment.
- the fluid accumulating portion 52 ′ of the heat sink member 5 ′ in this embodiment includes a plurality of spaced-apart downward slots 53 ′ formed in the top face 51 ′ of the heat sink member 5 ′.
- the peripheral wall 63 ′ of the tubular body 6 ′ has an inner surface 631 ′ provided with a capillary structure.
- the capillary structure includes a plurality of vertically and radially extending internal wicks 632 ′.
- the internal wicks 632 ′ not only increase the internal heat transfer area of the tubular body 6 ′, but also enhance the heat conduction effect of the heat pipe 3 of the present invention so that the heat exchange efficiency is improved.
- the fourth preferred embodiment of the heat pipe 3 according to the present invention is shown to be substantially similar to the third preferred embodiment.
- the capillary structure is a metal net 170 connected fixedly to the inner surface 631 ′ of the peripheral wall 63 ′ of the tubular body 6 ′.
- the fifth preferred embodiment of the heat pipe 3 according to the present invention is shown to be substantially similar to the third preferred embodiment.
- the capillary structure includes a plurality of spiral capillary grooves 633 .
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
A heat pipe includes a tubular body, a heat transfer fluid, and a heat sink member. The tubular body has opposite bottom and top ends, a peripheral wall between the bottom and top ends, and an inner chamber defined by the bottom and top ends and the peripheral wall for receiving the fluid therewithin. The heat sink member has a bottom face adapted to contact a heat source, and a top face indented downwardly to define a fluid accumulating portion. The fluid in the fluid accumulating portion absorbs heat from the heat source and vaporizes to carry heat away from the heat source.
Description
- This application claims priority of Taiwanese Application No. 092208421, filed on May 8, 2003.
- 1. Field of the Invention
- The invention relates to a heat pipe, more particularly to a heat pipe that can transfer heat quickly.
- 2. Description of the Related Art
- FIGS.1 to 4 illustrate a method for producing a
conventional heat pipe 1 that is suitable for dissipating heat from electronic components. The method includes the steps of providing a metallictubular body 11 with anopen end portion 111 and aperipheral wall 112 defining aninner chamber 113, introducing a suitable amount ofheat transfer liquid 13 into thetubular body 11 using afilling device 12, evacuating theinner chamber 113 of thetubular body 11, pinching theopen end portion 111 of thetubular body 11 by means of a machine tool 5 (see FIG. 2) so as to close theopen end portion 111 and so as to form a flattened sealing portion 114 (see FIG. 2), cutting atop end section 1141 of theflattened sealing portion 114 by means of a cutting machine 3 (see FIG. 3), and sealing theheat pipe 1 by a spot welding process. A welding spot, represented bynumeral 14, is shown in FIG. 4. - However, in actual use, the aforementioned
flattened sealing portion 114 of theheat pipe 1 is easily broken due to an external force, thereby resulting in leakage of theheat pipe 1. Furthermore, theflattened sealing portion 114 increases the length of theheat pipe 1 such that the latter has a relatively large volume. Moreover, since theliquid 13 is first introduced into thetubular body 11 followed by the evacuation process, it is possible that some of theliquid 13 will be drawn out such that the quantity of theliquid 13 in thetubular body 11 and the quality of theheat pipe 1 cannot be accurately controlled. Additionally, the method for producing theconventional heat pipe 1 is somewhat complicated. - Most importantly, heat dissipation of the
conventional heat pipe 1 involves stimulating theliquid 13 in thetubular body 11 through the rising temperature of theheat source 2, such as an integrated circuit, so that theliquid 13 gradually absorbs the heat and vaporizes, as shown by upward arrows in FIG. 4. The vaporized liquid exchanges heat with the external air through convection and then condenses into liquid, thereby achieving absorption and dissipation of heat from theheat source 2. However, although a liquid can absorb heat more rapidly than a solid, since the flat bottom of theheat pipe 1, which has a slow heat absorption rate, overlies theheat source 2 for heat exchange with theheat source 2 and for heat transfer to theliquid 13, the time required to stimulate theliquid 13 in thetubular body 11 is prolonged so that heat cannot be transferred quickly. - Therefore, the object of the present invention is to provide a heat pipe that is capable of overcoming the aforementioned drawbacks of the prior art.
- According to this invention, a heat pipe comprises a tubular body, a heat transfer fluid, and a heat sink member. The tubular body has opposite bottom and top ends, a peripheral wall between the bottom and top ends, and an inner chamber defined by the bottom and top ends and the peripheral wall. The heat transfer fluid is disposed in the inner chamber. The heat sink member closes the bottom end, and has a bottom face adapted to contact a heat source. The heat sink member further has a top face directed toward the inner chamber. The top face is indented downwardly to define a fluid accumulating portion. The heat transfer fluid in the fluid accumulating portion absorbs heat from the heat source and vaporizes to carry heat away from the heat source.
- Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments with reference to the accompanying drawings, of which:
- FIG. 1 is a fragmentary sectional view of a conventional heat pipe, illustrating how a heat transfer liquid is introduced into the heat pipe using a filling device;
- FIG. 2 is another fragmentary sectional view of the conventional heat pipe, illustrating the pinching of an open end portion of the heat pipe by a machine tool to form a flattened sealing portion;
- FIG. 3 is yet another fragmentary sectional view of the conventional heat pipe, illustrating the flattened sealing portion after being cut by a cutting machine;
- FIG. 4 is a further fragmentary sectional view of the conventional heat pipe, illustrating the heat pipe after being sealed by a spot welding process;
- FIG. 5 is an exploded perspective view of the first preferred embodiment of a heat pipe according to the present invention;
- FIG. 6 is a sectional view of the first preferred embodiment in an assembled state;
- FIG. 7 is a sectional view to illustrate the tubular body of the heat pipe of the first preferred embodiment when sealed;
- FIG. 8 is a sectional view of the second preferred embodiment of a heat pipe according to the present invention;
- FIG. 9 is the same view as FIG. 8, but with a resin cured in a filling hole to form a securing member;
- FIG. 10 is the same view as FIG. 9, but with a fluid introduced into the tubular body through a needle;
- FIG. 11 is the same view as FIG. 10, after being sealed with a sealant;
- FIG. 12 is an exploded perspective view of the third preferred embodiment of a heat pipe according to the present invention;
- FIG. 13 is a sectional view of the third preferred embodiment in an assembled state;
- FIG. 14 is a sectional view of the fourth preferred embodiment of a heat pipe according to the present invention; and
- FIG. 15 is a fragmentary sectional view of the fifth preferred embodiment of a heat pipe according to the present invention.
- Before the present invention is described in greater detail, it should be noted that like elements are denoted by the same reference numerals throughout the disclosure.
- Referring to FIGS.5 to 7, the first preferred embodiment of a
heat pipe 3 according to the present invention is shown to comprise aheat sink member 5, a metallictubular body 6, a heat transfer fluid 7 (see FIG. 6), acover member 8, anelastic sealing member 9, and a securingmember 100. - The
heat sink member 5 is made of a highly heat conductive metal, such as aluminum, copper, or an alloy. Theheat sink member 5 has abottom face 50 adapted to contact a heat source 4 (see FIG. 6), and atop face 51 opposite to thebottom face 50 and indented downwardly or concaved to define afluid accumulating portion 52. Thetop face 51 has acentral part 511 and a peripheral end 512 surrounding thecentral part 511, and is indented from the peripheral end 512 to thecentral part 511 so that theheat sink member 5 decreases in thickness from the peripheral end 512 to thecentral part 511. Thefluid accumulating portion 52 includes a centralfluid accumulating cavity 521, and a plurality ofchannels 522 extending outwardly from thecavity 521. - Since the indented
top face 51 formed with thecavity 521 and thechannels 522 provides a greater contact surface with thefluid 7 as compared with the flat bottom of the aforesaidconventional heat pipe 1, theheat sink member 5 is more efficient for heat transfer than the flat bottom of theconventional heat pipe 1. In addition, as theheat sink member 5 is thin at thecentral part 511, the rate of heat transfer from theheat source 4 to thefluid 7 through theheat sink member 5 can be increased as compared with the flat bottom of theconventional heat pipe 1 that has a constant thickness. - The
tubular body 6 has abottom end 61 sleeved fixedly on theheat sink member 5 so that theheat sink member 5 closes thebottom end 61, atop end 62 opposite to and in fluid communication with thebottom end 61, a peripheral wall 63 (see FIG. 6) between the bottom andtop ends inner chamber 64 defined by the bottom andtop ends peripheral wall 63. Thetop face 51 of theheat sink member 5 is directed toward theinner chamber 64. - The
heat sink member 5 further has a peripheral face extending between the top andbottom faces inner surface 631 of theperipheral wall 63 of thetubular body 6 at thebottom end 61 of thetubular body 6. The peripheral face is recessed to form aperipheral groove 54, and has a firstbraze metal wire 130 which is received in thegroove 54 and which is fused to join theheat sink member 5 to thetubular body 6. - The
heat transfer fluid 7 is disposed in theinner chamber 64, and can be accumulated in thefluid accumulating cavity 52 in theheat sink member 5. Thefluid 7 can be water, ammonia, or any other liquid that can vaporize when heated and that can condense when cooled. Theheat transfer fluid 7 in thefluid accumulating portion 52 absorbs heat from theheat source 4 and vaporizes to carry heat away from theheat source 4. - The
cover member 8 is mounted fixedly on and covers thetop end 62 of thetubular body 6, and has an inner side 85 (see FIG. 6) facing theinner chamber 64, anouter side 81 opposite to theinner side 85, and afilling hole 82 formed in thecover member 8, in fluid communication with theinner chamber 64, and extending through theouter side 81. Thefilling hole 82 is formed as ablind hole 83 which opens at theouter side 81 and which has a closed end 831 (see FIG. 6) adjacent to theinner side 85. Thecover member 8 further has a seat part 86 (see FIG. 6) at theinner side 85 to bound the closedend 831. Theseat part 86 has afirst needle hole 861 extending through theinner side 85 and communicated with theblind hole 83. Theblind hole 83 has a cross-section, which is gradually reduced from theouter side 81 to theinner side 85. - The
cover member 8 further has a peripheral face extending between the outer andinner sides inner surface 631 of theperipheral wall 63 of thetubular body 6 at thetop end 62 of thetubular body 6. The peripheral face of thecover member 8 is recessed to form aperipheral groove 84, and has a secondbraze metal wire 130′ that is received in thegroove 84 in thecover member 8 and that is fused to join thecover member 8 to thetubular body 6. - In this embodiment, the
elastic sealing member 9 is a cured sealing block fitted within the fillinghole 82, and is made of an elastic material, such as a rubber or a silicone elastomer. The sealingmember 9 is pierceable to provide a passage (not shown) for injection of theheat transfer fluid 7 through the sealingmember 9, and is contractible to seal the passage. - The securing
member 100 is fitted sealingly into theblind hole 83 and outwardly of the sealingmember 9 by means of a tool (not shown) so as to press the sealingmember 9 against theseat part 86 so that theouter surface 101 of the securingmember 100 is flush with theouter side 81 of thecover member 8, as shown by the straight line (L) in FIG. 7, thereby sealing thefirst needle hole 861 and preventing air from entering theinner chamber 64 in thetubular body 6. The securingmember 100 has a shape in conformity with that of theblind hole 83, asecond needle hole 102 in alignment with thefirst needle hole 861 in thecover member 8, and an insert piece 120 (see FIG. 7) disposed sealingly in thesecond needle hole 102. When aneedle 110 is withdrawn from thetubular body 6 and thesecond needle hole 102, thesecond needle hole 102 is closed by theinsert piece 120 for enhanced airtight sealing. Theinsert piece 120 may be a welding spot formed by a spot welding machine (not shown), or a sealant. - Referring once again to FIG. 7, to fill the
tubular body 6 with theheat transfer fluid 7, theneedle 110 is extended into theinner chamber 64 in thetubular body 6 by passing through thesecond needle hole 102 in the securingmember 100, the sealingmember 9, and thefirst needle hole 861 in theseat part 86 of thecover member 8. Theneedle 110 is connected to a controlling unit (not shown), which operates to subsequently evacuate air from within theinner chamber 64 and to introduce a predetermined amount of theheat transfer fluid 7 into theinner chamber 64. When theneedle 110 is withdrawn from thetubular body 6, the sealingmember 9, because of its elasticity, contracts to seal the passage in the sealingmember 9. Afterwards, theinsert piece 120 is used to seal thesecond needle hole 102. - The
heat sink member 5 and thecover member 8 can be fitted sealingly and respectively to the bottom and top ends 61, 62 of thetubular body 6 by a machine tool (not shown), or can be threadedly engaged to theperipheral wall 63 of thetubular body 6. - When the
heat source 4, such as a central processing unit, generates heat, theheat transfer fluid 7 in thefluid accumulating portion 52 of theheat sink member 5 vaporizes quickly, as shown by upward arrows in FIG. 7, because of the indented configuration of thetop face 51 of theheat sink member 5. Then, the vaporized fluid exchanges heat with the external air by convection and thus condenses and flows downward, as shown by downward arrows in FIG. 7. Furthermore, theheat pipe 3 of the present invention does not have to undergo the processes of pinching and cutting prior to sealing, has an outer appearance that is not easily broken by an external force, and a length that is shorter than that of the aforesaidconventional heat pipe 1 so that it does not occupy a relatively large amount of space. Moreover, the amount of theheat transfer fluid 7 filled in thetubular body 6 can be controlled accurately using simple processing equipment so that working quality of theheat pipe 3 of the present invention can be effectively ensured. - Referring to FIGS.8 to 11, the second preferred embodiment of the
heat pipe 3 according to the present invention is shown to be substantially similar to the first preferred embodiment. However, in this embodiment, the securingmember 100′ is provided by introducing a curable resin 150 into theblind hole 83 through a sealingmachine 140. After the resin 150 is cured, the resulting securingmember 100′ is retained sealingly in theblind hole 83, and abuts sealingly against the sealingmember 9 so as to press the sealingmember 9 against theseat part 86. Then, theneedle 110 is extended into theinner chamber 64 in thetubular body 6 by passing through the securingmember 100′, the sealingmember 9, and thefirst needle hole 861 in theseat part 86 of thecover member 8 to subsequently evacuate air from within theinner chamber 64 and to introduce theheat transfer fluid 7 into theinner chamber 64. When theneedle 110 is withdrawn from thetubular body 6, the securingmember 100′ and the sealingmember 9, because of their elastic characteristics, contract to seal the passages (not shown) in the securingmember 100′ and the sealingmember 9, after which a layer ofsealant 160 is disposed sealingly and outwardly of the securingmember 100′, thereby preventing air from entering theinner chamber 64 in thetubular body 6. - Referring to FIGS. 12 and 13, the third preferred embodiment of the
heat pipe 3 according to the present invention is shown to be substantially similar to the first preferred embodiment. However, unlike the first preferred embodiment, thefluid accumulating portion 52′ of theheat sink member 5′ in this embodiment includes a plurality of spaced-apartdownward slots 53′ formed in thetop face 51′ of theheat sink member 5′. Theperipheral wall 63′ of thetubular body 6′ has aninner surface 631′ provided with a capillary structure. The capillary structure includes a plurality of vertically and radially extendinginternal wicks 632′. Theinternal wicks 632′ not only increase the internal heat transfer area of thetubular body 6′, but also enhance the heat conduction effect of theheat pipe 3 of the present invention so that the heat exchange efficiency is improved. - Referring to FIG. 14, the fourth preferred embodiment of the
heat pipe 3 according to the present invention is shown to be substantially similar to the third preferred embodiment. However, in this embodiment, the capillary structure is ametal net 170 connected fixedly to theinner surface 631′ of theperipheral wall 63′ of thetubular body 6′. - Referring to FIG. 15, the fifth preferred embodiment of the
heat pipe 3 according to the present invention is shown to be substantially similar to the third preferred embodiment. However, in this embodiment, the capillary structure includes a plurality of spiralcapillary grooves 633. - While the present invention has been described in connection with what is considered the most practical and preferred embodiments, it is understood that this invention is not limited to the disclosed embodiments but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
Claims (14)
1. A heat pipe comprising:
a tubular body having opposite bottom and top ends, a peripheral wall between said bottom and top ends, and an inner chamber defined by said bottom and top ends and said peripheral wall;
a heat transfer fluid disposed in said inner chamber; and
a heat sink member closing said bottom end and having a bottom face adapted to contact a heat source, said heat sink member further having a top face directed toward said inner chamber, said top face being indented downwardly to define a fluid accumulating portion,
wherein said top face has a central part and a peripheral end surrounding said central part, said top face being indented from said peripheral end to said central part so that said heat sink member decreases in thickness from said peripheral end to said central part,
wherein said fluid accumulating portion of said heat sink member includes a central fluid accumulating cavity and a plurality of channels extending outwardly from said cavity, and
wherein said heat transfer fluid in said fluid accumulating portion absorbs heat from the heat source and vaporizes to carry heat away from the heat source.
2. The heat pipe as claimed in claim 1 , further comprising:
a cover member covering said top end, said cover member having an inner side facing said inner chamber, an outer side opposite to said inner side, and a filling hole formed in said cover member, in fluid communication with said inner chamber, and extending through said outer side; and
an elastic sealing member fitted within said filling hole,
wherein said elastic sealing member is pierceable to provide a passage for injection of said heat transfer fluid through said elastic sealing member, and is contractible to seal said passage.
3 and 4. (Canceled).
5. The heat pipe as claim in claim 1 , wherein said fluid accumulating portion of said heat sink member includes a plurality of spaced-apart downward slots formed in said top face.
6. The heat pipe as claimed in claim 1 , wherein said peripheral wall of said tubular body has an inner surface formed with a capillary structure.
7. The heat pipe as claimed in claim 6 , wherein said capillary structure includes a plurality of vertically and radially extending internal wicks.
8. The heat pipe as claimed in claim 6 , wherein said capillary structure is a metal net connected fixedly to said inner surface of said peripheral wall.
9. The heat pipe as claimed in claim 6 , wherein said capillary structure includes a plurality of spiral capillary grooves.
10. A heat pipe comprising:
a tubular body having opposite bottom and top ends, a peripheral wall between said bottom and top ends, and an inner chamber defined by said bottom and top ends and said peripheral wall;
a heat transfer fluid disposed in said inner chamber; and
a heat sink member closing said bottom end and having a bottom face adapted to contact a heat source, said heat sink member further having a top face directed toward said inner chamber, said top face being indented downwardly to define a fluid accumulating portion,
wherein said top face has a central part and a peripheral end surrounding said central part, said top face being indented from said peripheral end to said central part so that said heat sink member decreases in thickness from said peripheral end to said central part,
wherein said fluid accumulating portion of said heat sink member includes a plurality of spaced-apart downward slots formed in said top face, and
wherein said heat transfer fluid in said fluid accumulating portion absorbs heat from the heat source and vaporizes to carry heat away from the heat source.
11. The heat pipe as claimed in claim 10 , further comprising:
a cover member covering said top end, said cover member having an inner side facing said inner chamber, an outer side opposite to said inner side, and a filling hole formed in said cover member, in fluid communication with said inner chamber, and extending through said outer side; and
an elastic sealing member fitted within said filling hole,
wherein said elastic sealing member is pierceable to provide a passage for injection of said heat transfer fluid through said elastic sealing member, and is contractible to seal said passage.
12. The heat pipe as claimed in claim 10 , wherein said peripheral wall of said tubular body has an inner surface formed with a capillary structure.
13. The heat pipe as claimed in claim 11 , wherein said capillary structure includes a plurality of vertically and radially extending internal wicks.
14. The heat pipe as claimed in claim 11 , wherein said capillary structure is a metal net connected fixedly to said inner surface of said peripheral wall.
15. The heat pipe as claimed in claim 11 , wherein said capillary structure includes a plurality of spiral capillary grooves.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW92208421U TW575156U (en) | 2003-05-08 | 2003-05-08 | Heat pipe |
TW092208421 | 2003-05-08 | ||
TW92208421U | 2003-05-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
US20040231830A1 true US20040231830A1 (en) | 2004-11-25 |
US6827133B1 US6827133B1 (en) | 2004-12-07 |
Family
ID=32734947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/684,111 Expired - Fee Related US6827133B1 (en) | 2003-05-08 | 2003-10-10 | Heat pipe |
Country Status (2)
Country | Link |
---|---|
US (1) | US6827133B1 (en) |
TW (1) | TW575156U (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130133863A1 (en) * | 2011-11-30 | 2013-05-30 | Palo Alto Research Center Incorporated | Co-Extruded Microchannel Heat Pipes |
US9120190B2 (en) | 2011-11-30 | 2015-09-01 | Palo Alto Research Center Incorporated | Co-extruded microchannel heat pipes |
US20180051939A1 (en) * | 2016-08-17 | 2018-02-22 | Harris Corporation | Phase Change Cell |
WO2019074770A1 (en) * | 2017-10-12 | 2019-04-18 | Microsoft Technology Licensing, Llc | Sealing a heat pipe |
CN113357947A (en) * | 2021-06-11 | 2021-09-07 | 永安市方热锅炉设备有限公司 | Gravity type heat pipe, boiler and gravity type heat pipe manufacturing method |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7427243B2 (en) * | 2002-06-13 | 2008-09-23 | Acushnet Company | Golf ball with multiple cover layers |
US20050011567A1 (en) * | 2003-07-16 | 2005-01-20 | Hotmon International Corporation | Vacuum sealing-structure for heat-sinking conduit/chamber |
TW577969B (en) * | 2003-07-21 | 2004-03-01 | Arro Superconducting Technolog | Vapor/liquid separated heat exchanging device |
TWM247810U (en) * | 2003-12-05 | 2004-10-21 | Tai Sol Electronics Co Ltd | Liquid/gas phase heat dissipation apparatus with seal structure |
US7013957B2 (en) * | 2004-03-15 | 2006-03-21 | Hsu Hul-Chun | End surface structure of heat pipe |
US6986383B2 (en) * | 2004-03-30 | 2006-01-17 | Hul-Chun Hsu | End surface structure of a heat pipe for contact with a heat source |
US6973964B2 (en) * | 2004-03-30 | 2005-12-13 | Hsu Hul-Chun | End surface structure of heat pipe for contact with a heat source |
CN2705893Y (en) * | 2004-05-26 | 2005-06-22 | 鸿富锦精密工业(深圳)有限公司 | Phase changing heat radiator |
TWI256994B (en) * | 2004-06-30 | 2006-06-21 | Delta Electronics Inc | Heat column |
TWM260724U (en) * | 2004-07-02 | 2005-04-01 | Yeh Chiang Technology Corp | Improved structure of micro heating plate |
US20060065386A1 (en) * | 2004-08-31 | 2006-03-30 | Mohammed Alam | Self-actuating and regulating heat exchange system |
TWI263029B (en) * | 2005-01-14 | 2006-10-01 | Foxconn Tech Co Ltd | Cooling device with vapor chamber |
US7677052B2 (en) * | 2005-03-28 | 2010-03-16 | Intel Corporation | Systems for improved passive liquid cooling |
CN1840258B (en) * | 2005-03-28 | 2010-08-25 | 新灯源科技有限公司 | Method for manufacturing heat pipe with flat end surface |
CN100360888C (en) * | 2005-07-30 | 2008-01-09 | 嘉善华昇电子热传科技有限公司 | Cylindrical heat pipe |
TW200711557A (en) * | 2005-09-02 | 2007-03-16 | Sunonwealth Electr Mach Ind Co | Heat dissipation device |
EP1930942A4 (en) * | 2005-09-08 | 2011-03-09 | Neobulb Technologies Inc | A heat sinking module construction for heating component |
US7324341B2 (en) * | 2005-09-22 | 2008-01-29 | Delphi Technologies, Inc. | Electronics assembly and heat pipe device |
US20070107880A1 (en) * | 2005-11-17 | 2007-05-17 | Sunonwealth Electric Machine Industry Co., Ltd. | Heat sink structure |
US20070151710A1 (en) * | 2005-12-30 | 2007-07-05 | Touzov Igor V | High throughput technology for heat pipe production |
TWI325047B (en) * | 2006-09-29 | 2010-05-21 | Delta Electronics Inc | Heat pipe and manufacturing method thereof |
US7841386B2 (en) * | 2007-03-14 | 2010-11-30 | Chaun-Choung Technology Corp. | Anti-breaking structure for end closure of heat pipe |
TW200948506A (en) * | 2008-05-26 | 2009-12-01 | Ji-De Jin | Heat transfer device having no liquid filled pipe and manufacturing method thereof |
EP2649311B1 (en) | 2010-12-10 | 2018-04-18 | Schwarck Structure, LLC | Passive heat extraction and power generation |
US9179575B1 (en) | 2012-03-13 | 2015-11-03 | Rockwell Collins, Inc. | MEMS based device for phase-change autonomous transport of heat (PATH) |
US20140196285A1 (en) * | 2013-01-11 | 2014-07-17 | Ntis Enterprise Co., Ltd. | Heat siphon heat column and method for making the same |
US9121645B2 (en) | 2013-02-11 | 2015-09-01 | Google Inc. | Variable thickness heat pipe |
US20160095254A1 (en) * | 2014-09-29 | 2016-03-31 | International Business Machines Corporation | Managing heat transfer for electronic devices |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3613773A (en) * | 1964-12-07 | 1971-10-19 | Rca Corp | Constant temperature output heat pipe |
US5582242A (en) * | 1992-05-15 | 1996-12-10 | Digital Equipment Corporation | Thermosiphon for cooling a high power die |
US5632158A (en) * | 1995-03-20 | 1997-05-27 | Calsonic Corporation | Electronic component cooling unit |
US20030066628A1 (en) * | 2001-10-10 | 2003-04-10 | Fujikura Ltd. | Tower type finned heat pipe type heat sink |
US6725909B1 (en) * | 2003-01-06 | 2004-04-27 | Chin-Kuang Luo | Heat-dissipating device and method for fabricating the same |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6042593A (en) * | 1983-08-13 | 1985-03-06 | Tsuchiya Mfg Co Ltd | Method to manufacture heat exchanger of heat pipe type |
-
2003
- 2003-05-08 TW TW92208421U patent/TW575156U/en not_active IP Right Cessation
- 2003-10-10 US US10/684,111 patent/US6827133B1/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3613773A (en) * | 1964-12-07 | 1971-10-19 | Rca Corp | Constant temperature output heat pipe |
US5582242A (en) * | 1992-05-15 | 1996-12-10 | Digital Equipment Corporation | Thermosiphon for cooling a high power die |
US5632158A (en) * | 1995-03-20 | 1997-05-27 | Calsonic Corporation | Electronic component cooling unit |
US20030066628A1 (en) * | 2001-10-10 | 2003-04-10 | Fujikura Ltd. | Tower type finned heat pipe type heat sink |
US6725909B1 (en) * | 2003-01-06 | 2004-04-27 | Chin-Kuang Luo | Heat-dissipating device and method for fabricating the same |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130133863A1 (en) * | 2011-11-30 | 2013-05-30 | Palo Alto Research Center Incorporated | Co-Extruded Microchannel Heat Pipes |
US9120190B2 (en) | 2011-11-30 | 2015-09-01 | Palo Alto Research Center Incorporated | Co-extruded microchannel heat pipes |
US10160071B2 (en) | 2011-11-30 | 2018-12-25 | Palo Alto Research Center Incorporated | Co-extruded microchannel heat pipes |
US10371468B2 (en) * | 2011-11-30 | 2019-08-06 | Palo Alto Research Center Incorporated | Co-extruded microchannel heat pipes |
US20180051939A1 (en) * | 2016-08-17 | 2018-02-22 | Harris Corporation | Phase Change Cell |
US10184730B2 (en) * | 2016-08-17 | 2019-01-22 | Harris Corporation | Phase change cell |
US10935328B2 (en) | 2016-08-17 | 2021-03-02 | Harris Corporation | Phase change cell |
WO2019074770A1 (en) * | 2017-10-12 | 2019-04-18 | Microsoft Technology Licensing, Llc | Sealing a heat pipe |
CN113357947A (en) * | 2021-06-11 | 2021-09-07 | 永安市方热锅炉设备有限公司 | Gravity type heat pipe, boiler and gravity type heat pipe manufacturing method |
Also Published As
Publication number | Publication date |
---|---|
TW575156U (en) | 2004-02-01 |
US6827133B1 (en) | 2004-12-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6827133B1 (en) | Heat pipe | |
US7051794B2 (en) | Vapor-liquid separating type heat pipe device | |
US6725909B1 (en) | Heat-dissipating device and method for fabricating the same | |
US7469740B2 (en) | Heat dissipating device | |
US6651732B2 (en) | Thermally conductive elastomeric heat dissipation assembly with snap-in heat transfer conduit | |
US20180372419A1 (en) | Heat transfer device | |
US20150285562A1 (en) | Vapor chamber heat sink and method for making the same | |
US6913072B2 (en) | Heat dissipating device | |
US20140138057A1 (en) | Structure of low-profile heat pipe | |
TW200801433A (en) | Heat dissipation module and heat column thereof | |
US7347250B2 (en) | Loop heat pipe | |
US20040244948A1 (en) | Heat exchange device | |
US7464463B2 (en) | Method for making a heat dissipating device | |
US6880580B2 (en) | Heat pipe having an elastic sealing member | |
US20170010048A1 (en) | Thin vapor chamber and manufacturing method thereof | |
KR100510613B1 (en) | Heat pipe | |
US20060213056A1 (en) | Manufacturing system for making a heat dissipating device | |
JP2006017452A (en) | Heat column | |
US20010050165A1 (en) | Channel connection for pipe to block joints | |
US6966360B2 (en) | Heat pipe having an elastic sealing member | |
KR20210099105A (en) | Additive Manufacturing Heat Sink | |
US20120255716A1 (en) | Heat dissipation device and manufacturing method thereof | |
CN210126294U (en) | Welding sealing mechanism of radiating element processing machine | |
KR200334939Y1 (en) | A Heat Sink for the Communication Equipment which Included a Heat Pipe Function | |
CN111465254B (en) | Ultrathin radiating plate |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20161207 |