US20170160018A1 - Heat pipe with fiber wick structure - Google Patents

Heat pipe with fiber wick structure Download PDF

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Publication number
US20170160018A1
US20170160018A1 US15/361,756 US201615361756A US2017160018A1 US 20170160018 A1 US20170160018 A1 US 20170160018A1 US 201615361756 A US201615361756 A US 201615361756A US 2017160018 A1 US2017160018 A1 US 2017160018A1
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US
United States
Prior art keywords
wick structure
tubular body
section
heat pipe
mesh
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.)
Abandoned
Application number
US15/361,756
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English (en)
Inventor
Chuan-Chi TSENG
Xiao-Long Wu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tai Sol Electronics Co Ltd
Original Assignee
Tai Sol Electronics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tai Sol Electronics Co Ltd filed Critical Tai Sol Electronics Co Ltd
Assigned to TAI-SOL ELECTRONICS CO., LTD. reassignment TAI-SOL ELECTRONICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WU, Xiao-long, TSENG, CHUAN-CHI
Publication of US20170160018A1 publication Critical patent/US20170160018A1/en
Abandoned legal-status Critical Current

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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
    • F28D15/0233—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 the conduits having a particular shape, e.g. non-circular cross-section, annular
    • 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
    • F28D15/046—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 characterised by the material or the construction of the capillary structure

Definitions

  • the present invention relates to cooling technology and more particularly, to a heat pipe that has a fiber wick structure therein.
  • Chinese Patent CN 201787845 U discloses a flat heat pipe having a complex wick structure.
  • the heat pipe comprises a tubular body, and a triple wick structure consisting of a trench-shaped wick layer, a porous wick layer and a fiber wick layer.
  • This structure of heat pipe is functional before it is flattened or curved.
  • the porous wick layer i.e., sintered copper powder wick structure can collapse, leading to reduced capillary force, poor working fluid backflow effect, poor thermal conductivity and poor thermal performance.
  • Sintered copper powder wick structures, mesh wick structures, metal fiber wick structures and trench-shaped wick structures are well known in the industry. However, there is currently no specific way of setting the difference between the sintered copper powder wick structures, the metal fiber wick structures or the mesh wick structures.
  • the present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide a heat pipe with fiber wick structure, which uses a fiber wick structure and a mesh wick structure instead of the use of a copper powder wick structure, preventing wick structure damage when the heat pipe is flattened or curved, ensuring the working fluid backflow effect and maintaining the overall thermal conductivity and thermal performance.
  • a heat pipe comprises a tubular body, a mesh wick structure, a fiber wick structure and a working fluid.
  • the tubular body is a flat, elongated, double closed-end container longitudinally divided into an evaporator section, an adiabatic section and a condenser section.
  • the evaporator section and the condenser section are respectively located at two opposite ends of the tubular body.
  • the adiabatic section is connected between the evaporator section and the condenser section.
  • the mesh wick structure is mounted on an inner wall of the tubular body and covered over at least the overall inner surface area of the evaporator section of the tubular body.
  • the fiber wick structure is formed of a collection of multiple fibers in a flat elongated shape, comprising at least one contact surface.
  • the fiber wick structure is mounted in the evaporator section, the adiabatic section and the condenser section of the tubular body and extended along the longitudinal axis of the tubular body to occupy a part of the inside space of the tubular body.
  • the working fluid is filled in the tubular body.
  • the mesh wick structure surrounds the fiber wick structure.
  • the fiber wick structure has the at least one contact surface thereof partially disposed in contact with and sintered to the mesh wick structure and partially extended out of the mesh wick structure and disposed in contact with and sintered to the inner wall of the tubular body.
  • the fiber wick structure and the mesh wick structure will not be damaged when the tubular body is flattened or curved, ensuring the working fluid backflow effect and maintaining the overall thermal conductivity and thermal performance.
  • FIG. 1 is an oblique top elevational view of heat pipe with fiber wick structure in accordance with a first embodiment of the present invention.
  • FIG. 2 is a front view of the heat pipe with fiber wick structure in accordance with the first embodiment of the present invention.
  • FIG. 3 is a sectional view taken along line 3 - 3 of FIG. 1 .
  • FIG. 4 is a sectional view taken along line 4 - 4 of FIG. 2 .
  • FIG. 5 is a sectional view of heat pipe with fiber wick structure in accordance with a second embodiment of the present invention.
  • FIG. 6 is a sectional view of heat pipe with fiber wick structure in accordance with a third embodiment of the present invention.
  • FIG. 7 is a sectional view of heat pipe with fiber wick structure in accordance with a fourth embodiment of the present invention, where the view angle is similar to FIG. 3 .
  • the heat pipe 10 comprises a tubular body 11 , a mesh wick structure 13 , a fiber wick structure 15 and a working fluid.
  • the tubular body 11 is a flat, elongated, double closed-end container. Further, the tubular body 11 is longitudinally divided into three parts: the evaporator section H, the adiabatic (transport) section A and the condenser section C. The evaporator section H and the condenser section C are respectively located at the two opposite ends of the tubular body 11 .
  • the mesh wick structure 13 is arranged on an inner wall of the tubular body 11 , covering at least the overall inner surface area of the evaporator section H of the tubular body 11 .
  • the mesh wick structure 13 is sintered to the inner wall of the tubular body 11 to cover the overall inner surface area of the evaporator section H.
  • the mesh wick structure 13 increases the heating surface area and water storage capacity of the evaporator section H, and also enhances the capillary force of the evaporator section H on the working fluid.
  • the fiber wick structure 15 is formed of a collection of multiple fibers and arranged to exhibit a flat elongated shape, having two contact surfaces 16 respectively located on opposing top and bottom sides thereof.
  • the fiber wick structure 15 is longitudinally mounted in the evaporator section H, adiabatic (transport) section A and condenser section C of the tubular body 11 on the middle, and extended along the longitudinal axis of the tubular body 11 .
  • the two contact surfaces 16 of the fiber wick structure 15 are bonded to the inner wall of the tubular body 11 .
  • the fiber wick structure 15 occupies a part of the inside space of the tubular body 11 , dividing the inside space of the tubular body 11 into two subspaces 17 .
  • the fiber wick structure 15 is formed of a bundle of multiple metal fibers.
  • the working fluid is filled into the tubular body 11 . Further, the working fluid is absorbed into the mesh wick structure 13 and the fiber wick structure 15 , and thus, it is difficult to indicate the working fluid on the drawings. Further, because the working fluid is a very familiar component in the heat pipe industry, it is not illustrated in the annexed drawings.
  • the evaporator section H of the tubular body 11 is disposed in contact with a heat source (not shown) to absorb heat energy from the heat source, enabling the working fluid to be heated and evaporated in the evaporator section H so that the working fluid vapor thus produced can be transferred through the two subspaces 17 to the condenser section C. Because the condenser section C does not receive any external thermal energy, the working fluid vapor in the condenser section C is condensed into liquid phase that permeates into the fiber wick structure 15 and flows back to the evaporator section H for further evaporation. This gas-liquid transition is repeated again and again, achieving rapid thermal conductivity and the effect of uniform temperature.
  • the wick structures of the heat pipe in accordance with the present invention will not be damaged when the tubular body 11 is flattened or curved, ensuring the working fluid backflow effect and maintaining the overall thermal conductivity or thermal performance.
  • the maximum heat transfer capacity (Qmax) can be obtained when the void fraction of the wick structure is in a certain range. Therefore, the use of the fiber wick structure 15 and the mesh wick structure 13 prevents collapsing or increasing the void fraction of the wick structure when the tubular body 11 is flattened or curved, ensuring the maximum heat transfer capacity.
  • FIG. 5 a heat pipe with fiber wick structure 10 ′ in accordance with a second embodiment of the present invention is shown.
  • This second embodiment is substantially similar to the aforesaid first embodiment with the exceptions as follows:
  • the mesh wick structure 13 ′ covers the overall inner surface area of the evaporator section H of the tubular body 11 ′ and a part of the adiabatic (transport) section A.
  • the length of the mesh wick structure 13 ′ in accordance with this second embodiment is relatively longer than the mesh wick structure 13 in accordance with the first embodiment of the present invention, providing a relatively longer return path for the working fluid that is condensed on the inner wall of the tubular body 11 ′,
  • the mesh wick structure 13 ′ occupies a part of the volume of the two subspaces 17 ′, the flow path for the working fluid is relatively narrower in this second embodiment.
  • the user can decide whether or not to adopt the configuration of the second embodiment according to actual requirements.
  • FIG. 6 a heat pipe with fiber wick structure 10 ′′ in accordance with a third embodiment of the present invention is shown.
  • This third embodiment is substantially similar to the aforesaid second embodiment with the exceptions as follows:
  • the mesh wick structure 13 ′′ covers the overall inner surface of the evaporator section H of the tubular body 11 ′′ and the overall inner surface of the adiabatic (transport) section A.
  • the length of the mesh wick structure 13 ′′ in accordance with this third embodiment is relatively longer than the mesh wick structure 13 ′ in accordance with the second embodiment of the present invention, providing a relatively more longer return path for the working fluid, however, due to that the mesh wick structure 13 ′′ occupies more volume of the two subspaces 17 ′′, the flow path for the working fluid is relatively narrower in this third embodiment.
  • the user can decide whether or not to adopt the configuration of the third embodiment according to actual requirements.
  • FIG. 7 a heat pipe with fiber wick structure 40 in accordance with a fourth embodiment of the present invention is shown.
  • This fourth embodiment is substantially similar to the aforesaid first embodiment with the exceptions as follows:
  • the fiber wick structure 45 is so arranged that one contact surface 46 of the fiber wick structure 45 is bonded to the inner wall of the tubular body 41 , and the other contact surface 46 of the fiber wick structure 45 is spaced from the inner wall of the tubular body 41 at a predetermined distance.
  • the fiber wick structure 45 simply occupies a part of the inside space of the tubular body 41 without dividing the inside space of the tubular body 41 into two opposing subspaces.
  • the arrangement of the fiber wick structure 15 ( 45 ) on the central axis of the tubular body 11 ( 41 ) in the aforesaid four embodiments is not a limitation.
  • the fiber wick structure 15 ( 45 ) can be arranged on one lateral side of the central axis of the tubular body 11 ( 41 ), achieving the same effects.

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  • 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)
US15/361,756 2015-12-04 2016-11-28 Heat pipe with fiber wick structure Abandoned US20170160018A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW104219516 2015-12-04
TW104219516U TWM521170U (zh) 2015-12-04 2015-12-04 具有纖維毛細結構之熱管

Publications (1)

Publication Number Publication Date
US20170160018A1 true US20170160018A1 (en) 2017-06-08

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Family Applications (1)

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US15/361,756 Abandoned US20170160018A1 (en) 2015-12-04 2016-11-28 Heat pipe with fiber wick structure

Country Status (3)

Country Link
US (1) US20170160018A1 (zh)
JP (1) JP3203322U (zh)
TW (1) TWM521170U (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190113290A1 (en) * 2017-10-12 2019-04-18 Tai-Sol Electronics Co., Ltd. Vapor chamber with inner ridge forming passage
US20200149823A1 (en) * 2018-11-09 2020-05-14 Furukawa Electric Co., Ltd. Heat pipe
US11346617B2 (en) * 2017-07-28 2022-05-31 Furukawa Electric Co., Ltd. Wick structure and heat pipe accommodating wick structure

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110519961A (zh) * 2018-05-22 2019-11-29 惠州惠立勤电子科技有限公司 散热器及使用该散热器的散热装置
CN114761752A (zh) * 2020-01-21 2022-07-15 株式会社藤仓 热管
KR102582271B1 (ko) * 2022-02-28 2023-09-25 유일솔루텍(주) 웰 플레이트의 사출성형장치

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754594A (en) * 1972-01-24 1973-08-28 Sanders Associates Inc Unilateral heat transfer apparatus
US4674565A (en) * 1985-07-03 1987-06-23 The United States Of America As Represented By The Secretary Of The Air Force Heat pipe wick
US20110024085A1 (en) * 2009-07-28 2011-02-03 Huang Yu-Po Heat pipe and method for manufacturing the same
US20110174464A1 (en) * 2010-01-15 2011-07-21 Furui Precise Component (Kunshan) Co., Ltd. Flat heat pipe and method for manufacturing the same
US20110214841A1 (en) * 2010-03-04 2011-09-08 Kunshan Jue-Chung Electronics Co. Flat heat pipe structure
US20120048517A1 (en) * 2010-08-31 2012-03-01 Kunshan Jue-Chung Electronics Co., Heat pipe with composite wick structure
US20130248152A1 (en) * 2012-03-22 2013-09-26 Foxconn Technology Co., Ltd. Heat pipe with one wick structure supporting another wick structure in position
US20140166244A1 (en) * 2012-12-17 2014-06-19 Foxconn Technology Co., Ltd. Flat heat pipe and method for manufacturing the same
WO2014157147A1 (ja) * 2013-03-27 2014-10-02 古河電気工業株式会社 冷却装置
US20140305616A1 (en) * 2013-04-12 2014-10-16 Wistron Corp. Thin heating pipe

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754594A (en) * 1972-01-24 1973-08-28 Sanders Associates Inc Unilateral heat transfer apparatus
US4674565A (en) * 1985-07-03 1987-06-23 The United States Of America As Represented By The Secretary Of The Air Force Heat pipe wick
US20110024085A1 (en) * 2009-07-28 2011-02-03 Huang Yu-Po Heat pipe and method for manufacturing the same
US20110174464A1 (en) * 2010-01-15 2011-07-21 Furui Precise Component (Kunshan) Co., Ltd. Flat heat pipe and method for manufacturing the same
US20110214841A1 (en) * 2010-03-04 2011-09-08 Kunshan Jue-Chung Electronics Co. Flat heat pipe structure
US20120048517A1 (en) * 2010-08-31 2012-03-01 Kunshan Jue-Chung Electronics Co., Heat pipe with composite wick structure
US20130248152A1 (en) * 2012-03-22 2013-09-26 Foxconn Technology Co., Ltd. Heat pipe with one wick structure supporting another wick structure in position
US20140166244A1 (en) * 2012-12-17 2014-06-19 Foxconn Technology Co., Ltd. Flat heat pipe and method for manufacturing the same
WO2014157147A1 (ja) * 2013-03-27 2014-10-02 古河電気工業株式会社 冷却装置
US20160014931A1 (en) * 2013-03-27 2016-01-14 Furukawa Electric Co., Ltd. Cooling apparatus
US20140305616A1 (en) * 2013-04-12 2014-10-16 Wistron Corp. Thin heating pipe

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11346617B2 (en) * 2017-07-28 2022-05-31 Furukawa Electric Co., Ltd. Wick structure and heat pipe accommodating wick structure
US20190113290A1 (en) * 2017-10-12 2019-04-18 Tai-Sol Electronics Co., Ltd. Vapor chamber with inner ridge forming passage
US20200149823A1 (en) * 2018-11-09 2020-05-14 Furukawa Electric Co., Ltd. Heat pipe
US10976112B2 (en) * 2018-11-09 2021-04-13 Furukawa Electric Co., Ltd. Heat pipe

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Publication number Publication date
JP3203322U (ja) 2016-03-24
TWM521170U (zh) 2016-05-01

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AS Assignment

Owner name: TAI-SOL ELECTRONICS CO., LTD., TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:TSENG, CHUAN-CHI;WU, XIAO-LONG;SIGNING DATES FROM 20161017 TO 20161018;REEL/FRAME:040526/0809

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION