US20120048518A1 - Flat heat pipe with internal supporting element - Google Patents

Flat heat pipe with internal supporting element Download PDF

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Publication number
US20120048518A1
US20120048518A1 US12/885,571 US88557110A US2012048518A1 US 20120048518 A1 US20120048518 A1 US 20120048518A1 US 88557110 A US88557110 A US 88557110A US 2012048518 A1 US2012048518 A1 US 2012048518A1
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US
United States
Prior art keywords
heat pipe
supporting element
housing
flat heat
wick
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
US12/885,571
Inventor
Zhi-Yong Zhou
Sheng-Chao Zhang
Jun Zhang
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.)
Fuzhun Precision Industry Shenzhen Co Ltd
Foxconn Technology Co Ltd
Original Assignee
Fuzhun Precision Industry Shenzhen Co Ltd
Foxconn Technology 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 Fuzhun Precision Industry Shenzhen Co Ltd, Foxconn Technology Co Ltd filed Critical Fuzhun Precision Industry Shenzhen Co Ltd
Assigned to FOXCONN TECHNOLOGY CO., LTD., FU ZHUN PRECISION INDUSTRY (SHEN ZHEN) CO., LTD. reassignment FOXCONN TECHNOLOGY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ZHANG, JUN, ZHANG, Sheng-chao, ZHOU, ZHI-YONG
Publication of US20120048518A1 publication Critical patent/US20120048518A1/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
    • F28D15/04—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
    • 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
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2240/00—Spacing means

Definitions

  • the present disclosure relates to heat dissipation, and more particularly to a flat heat pipe.
  • a commonly used flat heat pipe includes a flat housing, a wick attached to an inner surface of the housing, and a working fluid contained in the housing.
  • the housing is thin and prone to sustain deformation from external force. When this happens, the normal functions and capabilities of the flat heat pipe are liable to be adversely affected.
  • FIG. 1 is an assembled view of a flat heat pipe of an embodiment of the present disclosure.
  • FIG. 2 is a cross section of the flat heat pipe of FIG. 1 , taken along line II-II thereof.
  • FIG. 3 is an isometric view of a supporting element of the heat pipe of FIG. 2 .
  • a flat heat pipe of the present embodiment includes a flat housing 10 , a wick 20 attached to an inner surface of the housing 10 , a supporting element 30 enclosed by the wick 20 and biasing the wick 20 against the housing 10 , and a working fluid (not shown) contained in the housing 10 .
  • the working fluid is water, alcohol or other material having a relatively low boiling point, which can easily change to vapor when absorbing heat from the housing 10 .
  • the housing 10 has both ends thereof hermetically sealed, and maintains a substantial vacuum therein.
  • the housing 10 is made from a single body of material which is hermetically crimped at both ends thereof.
  • the housing 10 is made of a high heat conductivity material such as copper.
  • the housing 10 includes an elongated top plate 11 , an elongated bottom plate 13 , and two curved connecting plates 15 .
  • the bottom plate 13 is spaced from and parallel to the top plate 11 .
  • the two connecting plates 15 adjoin opposite lateral sides of the top and bottom plate 11 , 13 , respectively.
  • the bottom plate 13 is an evaporating portion of the flat heat pipe, and is for thermally contacting a heat source (not shown) and absorbing heat therefrom.
  • the top plate 11 is a condensing portion of the flat heat pipe, and is for dissipating heat transferred from the bottom plate 13 .
  • the wick 20 is evenly distributed on the inner surface of the housing 10 .
  • the wick 20 has the shape of a flattened ellipse.
  • the wick 20 has a porous structure, which may be in the form of grooves, sintered powder, screen mesh, or bundles of fiber. The porous structure enables capillary force to act to absorb condensed working fluid at the top plate 11 of the flat heat pipe and convey the working fluid to the bottom plate 13 of the flat heat pipe.
  • the supporting element 30 is a woven screen made of a multiplicity of metal wires 31 and a multiplicity of metal wires 33 .
  • the wires 31 are spaced from and parallel to each other, and wires 33 are spaced from and parallel to each other.
  • the wires 31 and the wires 33 are interwoven.
  • material of the wires 31 , 33 is the same as that of the housing 10 .
  • a plurality of holes 35 is defined in the supporting element 30 through which the working fluid flows. An average diameter of the holes 35 exceeds an average diameter of the pores of the wick 20 .
  • a density of the holes 35 of the supporting element 30 is in the range from 5 ⁇ 50 mesh/inch.
  • a width of the supporting element 30 is equal to that of the top plate 11 of the container 10 , as measured between the two connecting plates 15 .
  • a length of the supporting element 30 is smaller than that of the top plate 11 , as measured in a direction perpendicular to the line II-II of FIG. 2 .
  • the supporting element 30 is located at a middle of the housing 10 . Top and bottom sides of the supporting element 30 elastically bias top and bottom portions of the wick 20 against the top plate 11 and the bottom plate 13 of the housing 10 , to avoid deformation of the housing 10 when the top plate 11 or the bottom plate 13 is compressed. Thus, compressive resistance of the flat heat pipe is improved.

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 Electrical Apparatus (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Abstract

An exemplary flat heat pipe includes a flat housing, a wick, a working fluid, and a supporting element. The wick is attached to an inner surface of the housing. The working fluid is contained in the housing. The supporting element is a woven screen made of metal wires and a plurality of through holes is defined therein. The supporting element is enclosed by the wick and opposite sides thereof bias the wick against opposite portions of the housing.

Description

    BACKGROUND
  • 1. Technical Field
  • The present disclosure relates to heat dissipation, and more particularly to a flat heat pipe.
  • 2. Description of Related Art
  • A commonly used flat heat pipe includes a flat housing, a wick attached to an inner surface of the housing, and a working fluid contained in the housing. However, the housing is thin and prone to sustain deformation from external force. When this happens, the normal functions and capabilities of the flat heat pipe are liable to be adversely affected.
  • It is thus desirable to provide a flat heat pipe which can overcome the described limitations.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is an assembled view of a flat heat pipe of an embodiment of the present disclosure.
  • FIG. 2 is a cross section of the flat heat pipe of FIG. 1, taken along line II-II thereof.
  • FIG. 3 is an isometric view of a supporting element of the heat pipe of FIG. 2.
    •  DETAILED DESCRIPTION
  • Referring to FIGS. 1-2, a flat heat pipe of the present embodiment includes a flat housing 10, a wick 20 attached to an inner surface of the housing 10, a supporting element 30 enclosed by the wick 20 and biasing the wick 20 against the housing 10, and a working fluid (not shown) contained in the housing 10.
  • The working fluid is water, alcohol or other material having a relatively low boiling point, which can easily change to vapor when absorbing heat from the housing 10.
  • The housing 10 has both ends thereof hermetically sealed, and maintains a substantial vacuum therein. In the present embodiment, the housing 10 is made from a single body of material which is hermetically crimped at both ends thereof. The housing 10 is made of a high heat conductivity material such as copper. The housing 10 includes an elongated top plate 11, an elongated bottom plate 13, and two curved connecting plates 15. The bottom plate 13 is spaced from and parallel to the top plate 11. The two connecting plates 15 adjoin opposite lateral sides of the top and bottom plate 11, 13, respectively. The bottom plate 13 is an evaporating portion of the flat heat pipe, and is for thermally contacting a heat source (not shown) and absorbing heat therefrom. The top plate 11 is a condensing portion of the flat heat pipe, and is for dissipating heat transferred from the bottom plate 13.
  • The wick 20 is evenly distributed on the inner surface of the housing 10. In the cross-section of FIG. 2, the wick 20 has the shape of a flattened ellipse. The wick 20 has a porous structure, which may be in the form of grooves, sintered powder, screen mesh, or bundles of fiber. The porous structure enables capillary force to act to absorb condensed working fluid at the top plate 11 of the flat heat pipe and convey the working fluid to the bottom plate 13 of the flat heat pipe.
  • Referring also to FIG. 3, the supporting element 30 is a woven screen made of a multiplicity of metal wires 31 and a multiplicity of metal wires 33. The wires 31 are spaced from and parallel to each other, and wires 33 are spaced from and parallel to each other. The wires 31 and the wires 33 are interwoven. Preferably, material of the wires 31, 33 is the same as that of the housing 10. A plurality of holes 35 is defined in the supporting element 30 through which the working fluid flows. An average diameter of the holes 35 exceeds an average diameter of the pores of the wick 20. A density of the holes 35 of the supporting element 30 is in the range from 5˜50 mesh/inch. A width of the supporting element 30 is equal to that of the top plate 11 of the container 10, as measured between the two connecting plates 15. A length of the supporting element 30 is smaller than that of the top plate 11, as measured in a direction perpendicular to the line II-II of FIG. 2. The supporting element 30 is located at a middle of the housing 10. Top and bottom sides of the supporting element 30 elastically bias top and bottom portions of the wick 20 against the top plate 11 and the bottom plate 13 of the housing 10, to avoid deformation of the housing 10 when the top plate 11 or the bottom plate 13 is compressed. Thus, compressive resistance of the flat heat pipe is improved.
  • It is to be understood, however, that even though numerous characteristics and advantages of the embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.

Claims (16)

What is claimed is:
1. A flat heat pipe comprising:
a flat housing containing a vacuum;
a wick attached to an inner surface of the housing;
a working fluid contained in the housing; and
a supporting element enclosed by the wick, opposite sides of the supporting element biasing the wick against opposite flat portions of the housing, respectively, the supporting element comprising a woven screen of metal wires in which a plurality of through holes is defined.
2. The flat heat pipe of claim 1, wherein material of the supporting element is the same as that of the housing.
3. The flat heat pipe of claim 2, wherein the supporting element and housing are both made of copper.
4. The flat heat pipe of claim 1, wherein the wick defines a plurality of pores therein.
5. The flat heat pipe of claim 4, wherein an average diameter of the through holes of the supporting element exceeds that of the pores of the wick.
6. The flat heat pipe of claim 1, wherein the wick has a porous structure in the form of at least one item selected from the group consisting of grooves, sintered powder, screen mesh, and bundles of fiber.
7. The flat heat pipe of claim 1, wherein a density of the through holes of the supporting element is in the range from 5˜50 mesh/inch.
8. The flat heat pipe of claim 1, wherein the housing comprises a top plate, a bottom plate, and two side plates adjoining the top plate and the bottom plate, and the opposite sides of the supporting element bias the wick at the top plate and the bottom plate of the housing, respectively.
9. The flat heat pipe of claim 1, wherein the supporting element is made of a plurality of first metal wires and a plurality of second metal wires, the first metal wires are spaced from and parallel to each other, and the second metal wires are spaced from and parallel to each other.
10. A flat heat pipe comprising:
a flat housing comprising a top plate, a bottom plate facing toward and spaced from the top plate, and two side plates adjoining opposite sides of the top plate and the bottom plate;
a wick attached to inner surfaces of the top plate, the bottom plate and the side plates of the housing;
a working fluid contained in the housing; and
a supporting element received in the housing, the supporting element comprising a woven screen of metal wires, with opposite sides of the supporting element biasing the wick against the top plate and the bottom plate of the housing.
11. The flat heat pipe of claim 10, wherein the supporting element comprises a plurality of first wires and second wires, interwoven together.
12. The flat heat pipe of claim 11, wherein the first wires are spaced from and parallel to each other, and the second wires are spaced from and parallel to each other.
13. The flat heat pipe of claim 10, wherein a plurality of through holes is defined in the supporting element, the wick defines a plurality of pores, and an average diameter of the through hole exceeds an average diameter of the pores of the wick.
14. The flat heat pipe of claim 13, wherein a density of the through holes is in range from 5˜50 mesh/inch.
15. The flat heat pipe of claim 10, wherein the wick has a porous structure in the form of at least one item selected from the group consisting of grooves, sintered powder, screen mesh, or bundles of fiber.
16. The flat heat pipe of claim 10, wherein the supporting element is located at a middle of the housing.
US12/885,571 2010-08-26 2010-09-19 Flat heat pipe with internal supporting element Abandoned US20120048518A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010263680.8 2010-08-26
CN2010102636808A CN102374808A (en) 2010-08-26 2010-08-26 Flat-plate type vapor chamber

Publications (1)

Publication Number Publication Date
US20120048518A1 true US20120048518A1 (en) 2012-03-01

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CN (1) CN102374808A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110048341A1 (en) * 2009-09-03 2011-03-03 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Vapor chamber and method for manufacturing the same
US20130213611A1 (en) * 2012-02-22 2013-08-22 Chun-Ming Wu Heat pipe heat dissipation structure
US20140290913A1 (en) * 2013-03-28 2014-10-02 Quanta Computer Inc. Heat transfer module, heat pipe, and manufacturing method of heat pipe
US20150122460A1 (en) * 2013-11-06 2015-05-07 Asia Vital Components Co., Ltd. Heat pipe structure
US20170067696A1 (en) * 2015-09-08 2017-03-09 Acmecools Tech. Ltd. Vapor chamber
EP3330654A4 (en) * 2015-07-27 2019-03-06 Chi-Te Chin Plate-like temperature uniforming device
WO2022256629A1 (en) * 2021-06-04 2022-12-08 Kuprion, Inc. Heat pipes featuring coefficient of thermal expansion matching and heat dissipation using same
US20230030019A1 (en) * 2021-07-27 2023-02-02 Asia Vital Components Co., Ltd. Heat pipe structure

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CN106403674B (en) * 2015-07-27 2019-01-04 极致科技股份有限公司 Plate temperature equalization system
CN107333442A (en) * 2017-07-24 2017-11-07 苏州天脉导热科技有限公司 Ultra-thin soaking plate and preparation method thereof
CN107388863A (en) * 2017-08-22 2017-11-24 华南理工大学 A kind of soaking plate structure
CN110678042A (en) * 2019-09-30 2020-01-10 华南理工大学 Hot-pressing type flexible phase change soaking zone/board based on polymer film and manufacturing method thereof
CN113571486A (en) * 2020-08-04 2021-10-29 昆山同川铜业科技有限公司 Phase-change latent heat type chip radiator
CN113758330A (en) * 2021-09-02 2021-12-07 Oppo广东移动通信有限公司 Heat transfer element and terminal

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3604504A (en) * 1970-05-13 1971-09-14 Rca Corp Flexible heat pipe
US20060157229A1 (en) * 2005-01-14 2006-07-20 Foxconn Technology Co., Ltd. Heat pipe
US20080210407A1 (en) * 2005-01-06 2008-09-04 Celsia Technologies Korea Inc. Heat Transfer Device and Manufacturing Method Thereof Using Hydrophilic Wick
US20100006268A1 (en) * 2008-07-14 2010-01-14 Meyer Iv George Anthony Vapor chamber and supporting structure of the same
US20100084113A1 (en) * 2006-10-11 2010-04-08 Jeong Hyun Lee Method for heat transfer and device therefor
US20100155031A1 (en) * 2008-12-22 2010-06-24 Furui Precise Component (Kunshan) Co., Ltd. Heat pipe and method of making the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3834457A (en) * 1971-01-18 1974-09-10 Bendix Corp Laminated heat pipe and method of manufacture
JPS56146989A (en) * 1980-04-15 1981-11-14 Fujikura Ltd Heat pipe
JP3164518B2 (en) * 1995-12-21 2001-05-08 古河電気工業株式会社 Flat heat pipe
KR20050032888A (en) * 2003-10-02 2005-04-08 엘에스전선 주식회사 Flat plate heat transfer device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3604504A (en) * 1970-05-13 1971-09-14 Rca Corp Flexible heat pipe
US20080210407A1 (en) * 2005-01-06 2008-09-04 Celsia Technologies Korea Inc. Heat Transfer Device and Manufacturing Method Thereof Using Hydrophilic Wick
US20060157229A1 (en) * 2005-01-14 2006-07-20 Foxconn Technology Co., Ltd. Heat pipe
US20100084113A1 (en) * 2006-10-11 2010-04-08 Jeong Hyun Lee Method for heat transfer and device therefor
US20100006268A1 (en) * 2008-07-14 2010-01-14 Meyer Iv George Anthony Vapor chamber and supporting structure of the same
US20100155031A1 (en) * 2008-12-22 2010-06-24 Furui Precise Component (Kunshan) Co., Ltd. Heat pipe and method of making the same

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110048341A1 (en) * 2009-09-03 2011-03-03 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Vapor chamber and method for manufacturing the same
US20130213611A1 (en) * 2012-02-22 2013-08-22 Chun-Ming Wu Heat pipe heat dissipation structure
US9170058B2 (en) * 2012-02-22 2015-10-27 Asia Vital Components Co., Ltd. Heat pipe heat dissipation structure
US20140290913A1 (en) * 2013-03-28 2014-10-02 Quanta Computer Inc. Heat transfer module, heat pipe, and manufacturing method of heat pipe
US20150122460A1 (en) * 2013-11-06 2015-05-07 Asia Vital Components Co., Ltd. Heat pipe structure
EP3330654A4 (en) * 2015-07-27 2019-03-06 Chi-Te Chin Plate-like temperature uniforming device
US20170067696A1 (en) * 2015-09-08 2017-03-09 Acmecools Tech. Ltd. Vapor chamber
US10012446B2 (en) * 2015-09-08 2018-07-03 Acmecools Tech. Ltd. Vapor chamber
WO2022256629A1 (en) * 2021-06-04 2022-12-08 Kuprion, Inc. Heat pipes featuring coefficient of thermal expansion matching and heat dissipation using same
US20230030019A1 (en) * 2021-07-27 2023-02-02 Asia Vital Components Co., Ltd. Heat pipe structure

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Legal Events

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AS Assignment

Owner name: FOXCONN TECHNOLOGY CO., LTD., TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ZHOU, ZHI-YONG;ZHANG, SHENG-CHAO;ZHANG, JUN;REEL/FRAME:025009/0951

Effective date: 20100916

Owner name: FU ZHUN PRECISION INDUSTRY (SHEN ZHEN) CO., LTD.,

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ZHOU, ZHI-YONG;ZHANG, SHENG-CHAO;ZHANG, JUN;REEL/FRAME:025009/0951

Effective date: 20100916

STCB Information on status: application discontinuation

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