US20150114604A1 - Heat pipe with ultra-thin capillary structure - Google Patents

Heat pipe with ultra-thin capillary structure Download PDF

Info

Publication number
US20150114604A1
US20150114604A1 US14/180,410 US201414180410A US2015114604A1 US 20150114604 A1 US20150114604 A1 US 20150114604A1 US 201414180410 A US201414180410 A US 201414180410A US 2015114604 A1 US2015114604 A1 US 2015114604A1
Authority
US
United States
Prior art keywords
capillary structure
heat pipe
ultra
tube body
capillary
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
US14/180,410
Other languages
English (en)
Inventor
Hao Pai
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of US20150114604A1 publication Critical patent/US20150114604A1/en
Abandoned legal-status Critical Current

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
    • 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

Definitions

  • the present invention generally relates to a miniaturized heat pipe, more particularly to a heat pipe with an ultra-thin capillary structure.
  • a capillary structure inside the ultra-thin heat pipe shall follow the design tendency to be smaller as well.
  • design the capillary structure it may focus on the inner space of a heat pipe in order to avoid that the inner space is too small to let air or fluid be through. That is, when an ultra-thin heat pipe is manufactured in a sintering process, its volume is designed very small to cause that metal powders are not able to be through a gap between a mandrel bar and the inner wall of the ultra-thin heat pipe, and part of the metal powders may not be positioned in the ultra-thin heat pipe. That is why a powdered capillary structure of an ultra-thin heat pipe is only formed at a location of the heat pipe without completion in prior arts.
  • this kind of powdered capillary structure may be short of a better vaporization surface area, a better condensation surface area, a better liquid transmission sectional surface area, a fluent vapor channel, and a reinforced supporting structure, and we would know the prior ultra-thin heat pipe should be improved in the aspect of heat transmission.
  • the present invention is to provide a heat pipe with an ultra-thin capillary structure. It is to form a miniaturized capillary structure on an inner wall of a heat pipe in order to maintain an enough space of a vapor channel for heat exchange, for example vaporization and condensation. Furthermore, the heat pipe has a largest capillary surface area and a liquid transmission sectional area, so as to approach the aspect with a miniaturized heat pipe.
  • the capillary structure has an adhering surface attaching on a partial portion of an inner wall of the tube body, and a forming surface corresponding to the adhering surface.
  • a vapor channel is formed between the forming surface and the inner wall of the tube body; wherein the forming surface further comprises an abutting surface elongated along a longitudinal direction of the vapor channel and at least one capillary transmission surface extending from a side of the abutting surface to connect to the adhering surface , and the capillary transmission surface is gradually inclined between the adhering surface and the abutting surface.
  • FIG. 1 illustrates a schematic perspective view according to the present invention
  • FIG. 2 illustrates a schematic cross-sectional view of a section 2 - 2 of FIG. 1 according to the present invention
  • FIG. 3 illustrates a schematic cross-sectional view of a second embodiment according to the present invention based on a view direction of FIG. 2 ;
  • FIG. 4 illustrates a schematic perspective view of a third embodiment according to the present invention
  • FIG. 5 illustrates a schematic perspective view of a fourth embodiment according to the present invention
  • FIG. 6 illustrates a schematic perspective view of a fifth embodiment according to the present invention.
  • FIG. 7 illustrates a schematic partial and enlarged sectional view inside a tube body of the fifth embodiment according to the present invention
  • FIG. 1 and FIG. 2 illustrate a schematic perspective view and a schematic cross-sectional view of a section 2 - 2 of FIG. 1 according to the present invention.
  • the present invention provides a heat pipe with an ultra-thin capillary structure.
  • the heat pipe comprises a tube body 1 that is hollow and flat, and at least one capillary structure 2 that is in the tube body 1 and contacts with partial inner walls of the tube body 1 .
  • the tube body 1 is formed by a pressing process, and is a flat type with a thickness under 0 . 5 mm.
  • the tube body 1 When the tube body 1 is formed, the tube body 1 comprises an upper wall 10 , a lower wall 11 , and a plurality of side edges 12 , wherein the upper wall 10 and the lower wall 11 are arranged corresponding to each other, and the side edges 12 are connected between the upper wall 10 and the lower wall 11 .
  • the capillary structure 2 is disposed in the tube body 1 .
  • the capillary structure 2 is made by knit, fiber, sintered metal powders, or any of their combination, in order to form a shape of thin plate.
  • the capillary structure 2 Prior to dispose the capillary structure 2 in the tube body 1 , the capillary structure 2 is made. As a matter of fact, the capillary structure 2 is placed in the tube body 1 and simultaneously pressed with the tube body 1 .
  • the capillary structure 2 has an adhering surface 20 attached on a partial portion of an inner wall of the tube body 1 , and a forming surface 21 with a continuous concave arc corresponding to the adhering surface 20 .
  • the adhering surface 20 is positioned on the partial portion of the inner wall, for example the inner surface of the lower wall 11 , of the tube body 1 .
  • the inner wall for example the inner surface of the upper wall 10
  • the inner wall 11 abuts on a partial portion of the forming surface 21 of the capillary structure 2 .
  • a vapor channel 100 is formed between the rest portion of the forming surface 21 and the upper wall 10 , the inner wall 11 , and one of the side edges 12 inside the tube body 1 .
  • the adhering surface 20 is elongated along a longitudinal direction of the vapor channel 100 , and a porosity of the forming surface 21 is gradually reduced as the forming surface 21 is extended toward the adhering surface 20 .
  • Factor in the formation of the porosity feature of the forming surface 21 is that the capillary structure 2 is extruded by the pressing process.
  • the forming surface 21 has an abutting surface 210 that is attached on the inner surface of the upper wall 10 and elongated along a longitudinal direction of the vapor channel 100 , and at least one capillary transmission surface 211 that extends from a side of the abutting surface 210 to connect to the adhering surface 20 .
  • the capillary transmission surface 211 is gradually inclined between the adhering surface 20 and the abutting surface 210 .
  • the benefits of the inclined capillary transmission surface 211 are to increase a surface area between the capillary structure 2 and the vapor channel 100 , reduce flow resistance of vapor flow, and increase a capillary surface area of working fluid flowing back to the capillary structure 2 , in order to achieve a better heat-exchange rate, even though the capillary structure 2 is thinned.
  • the present invention discloses that two sides of the capillary structure 2 form the two vapor channels 100 and the two capillary transmission surfaces 211 , respectively.
  • the two capillary transmission surfaces 211 of the capillary structure 2 can be asymmetrical, but in FIG. 2 , there is a symmetrical arrangement.
  • the capillary structure 2 is formed with at least one bare area 22 .
  • the capillary transmission surface 211 formed at the one side or both capillary transmission surfaces 211 respectively formed at two sides of the forming surface 21 are removed to separately form one or more bare areas 22 .
  • the bare areas 22 can be formed at a transmission section between a vaporizing section and a condensation section of a heat pipe.
  • the capillary transmission surface 211 can have a plurality of air flow holes 220 exposing inner surface of the lower wall 11 of the tube body 1 , in order to increase a capillary transmission area.
  • FIG. 5 instead of forming the round air flow holes 220 , there are a plurality of cut-outs 220 ′ formed on each capillary transmission surface 211 .
  • FIG. 6 and FIG. 7 there are a plurality of grooves 101 that are radially threaded, in right helical direction, left helical direction, or both, or even irregularly, on the inner wall of the tube body 1 .
  • a depth of the groove 101 is less than 0 . 03 mm, and is usually less than 30% of a thickness of the tube body 1 as well, as shown in FIG. 7 .
  • the grooves 101 are formed on the inner surface of the tube body 1 , the structure of the grooves 101 will not interfere the formation of the vapor channel 100 .
  • the grooves 101 are radially threaded to surrounding on the inner wall of the tube body 1 , the liquid working fluid can flow back to the capillary structure 2 ; on the other hand, the liquid working fluid flowing back axially (along the longitudinal direction) is through the capillary structure 2 as well. Therefore, the grooves 101 can provide auxiliary help to the capillary structure 2 to form a capillary transmission net that totally covers totally the inner wall of the tube body 1 .

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)
US14/180,410 2013-10-29 2014-02-14 Heat pipe with ultra-thin capillary structure Abandoned US20150114604A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW102139178A TW201516367A (zh) 2013-10-29 2013-10-29 具有超薄化毛細結構之熱管（一）
TW102139178 2013-10-29

Publications (1)

Publication Number Publication Date
US20150114604A1 true US20150114604A1 (en) 2015-04-30

Family

ID=51009606

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/180,410 Abandoned US20150114604A1 (en) 2013-10-29 2014-02-14 Heat pipe with ultra-thin capillary structure

Country Status (3)

Country Link
US (1) US20150114604A1 (zh)
CN (2) CN104567496A (zh)
TW (1) TW201516367A (zh)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160018166A1 (en) * 2014-07-16 2016-01-21 Fujikura Ltd. Flat heat pipe
US20160153723A1 (en) * 2014-11-28 2016-06-02 Delta Electronics, Inc. Heat pipe
WO2017115772A1 (ja) * 2015-12-28 2017-07-06 古河電気工業株式会社 ヒートパイプ
WO2017115771A1 (ja) * 2015-12-28 2017-07-06 古河電気工業株式会社 ヒートパイプ
WO2018097131A1 (ja) * 2016-11-22 2018-05-31 株式会社フジクラ ヒートパイプ
WO2019065728A1 (ja) * 2017-09-29 2019-04-04 株式会社村田製作所 ベーパーチャンバー
US11543188B2 (en) * 2016-06-15 2023-01-03 Delta Electronics, Inc. Temperature plate device

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160018166A1 (en) * 2014-07-16 2016-01-21 Fujikura Ltd. Flat heat pipe
US20210222958A1 (en) * 2014-11-28 2021-07-22 Delta Electronics, Inc. Heat pipe
US20160153723A1 (en) * 2014-11-28 2016-06-02 Delta Electronics, Inc. Heat pipe
US20240011719A1 (en) * 2014-11-28 2024-01-11 Delta Electronics, Inc. Heat pipe
US11796259B2 (en) 2014-11-28 2023-10-24 Delta Electronics, Inc. Heat pipe
US11598585B2 (en) * 2014-11-28 2023-03-07 Delta Electronics, Inc. Heat pipe
WO2017115772A1 (ja) * 2015-12-28 2017-07-06 古河電気工業株式会社 ヒートパイプ
WO2017115771A1 (ja) * 2015-12-28 2017-07-06 古河電気工業株式会社 ヒートパイプ
US10782076B2 (en) 2015-12-28 2020-09-22 Furukawa Electric Co., Ltd. Heat pipe
US10794635B2 (en) 2015-12-28 2020-10-06 Furukawa Electric Co., Ltd. Heat pipe
US11543188B2 (en) * 2016-06-15 2023-01-03 Delta Electronics, Inc. Temperature plate device
CN109964093A (zh) * 2016-11-22 2019-07-02 株式会社藤仓 热管
JPWO2018097131A1 (ja) * 2016-11-22 2019-06-24 株式会社フジクラ ヒートパイプ
WO2018097131A1 (ja) * 2016-11-22 2018-05-31 株式会社フジクラ ヒートパイプ
US11231235B2 (en) 2017-09-29 2022-01-25 Murata Manufacturing Co., Ltd. Vapor chamber
WO2019065728A1 (ja) * 2017-09-29 2019-04-04 株式会社村田製作所 ベーパーチャンバー

Also Published As

Publication number Publication date
TW201516367A (zh) 2015-05-01
CN104567496A (zh) 2015-04-29
CN203687718U (zh) 2014-07-02

Similar Documents

Publication Publication Date Title
US20150114604A1 (en) Heat pipe with ultra-thin capillary structure
US20150114603A1 (en) Heat pipe with ultra-thin capillary structure
US11796259B2 (en) Heat pipe
US10371458B2 (en) Thermal conducting structure
US9453689B2 (en) Flat heat pipe
US20100319882A1 (en) Ultra-thin heat pipe and manufacturing method thereof
US20150176916A1 (en) Flat mesh wick structure of ultrathin heat pipe and ultrathin heat pipe having the same
US20110174465A1 (en) Flat heat pipe with vapor channel
US9291398B2 (en) Micro vapor chamber
US20150101784A1 (en) Heat pipe with ultra-thin flat wick structure
US20110174464A1 (en) Flat heat pipe and method for manufacturing the same
US20140166244A1 (en) Flat heat pipe and method for manufacturing the same
US20090308576A1 (en) Heat pipe with a dual capillary structure and manufacturing method thereof
CN103673702A (zh) 热管及其制造方法
US20130037242A1 (en) Thin-type heat pipe structure
US9506699B2 (en) Heat pipe structure
US20120279687A1 (en) Flat-type heat pipe and wick structure thereof
US20160153720A1 (en) Heat pipe
US20120111540A1 (en) Flat type heat pipe and method for manufacturing the same
US20110174466A1 (en) Flat heat pipe
CN101398272A (zh) 热管
US10145619B2 (en) Heat pipe
TW201331539A (zh) 扁平熱管及其製造方法
US20170153067A1 (en) Composite fiber capillary structure, heat pipe thereof and fabricating method for the same
US20130037241A1 (en) Heat pipe with unequal cross-sections

Legal Events

Date Code Title Description
STCB Information on status: application discontinuation

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