CN2784853Y - 热管 - Google Patents

热管 Download PDF

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Publication number
CN2784853Y
CN2784853Y CN200420103587.0U CN200420103587U CN2784853Y CN 2784853 Y CN2784853 Y CN 2784853Y CN 200420103587 U CN200420103587 U CN 200420103587U CN 2784853 Y CN2784853 Y CN 2784853Y
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heat pipe
heat
liquid
hydrophilic layer
housing
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CN200420103587.0U
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林国隆
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Priority to CN200420103587.0U priority Critical patent/CN2784853Y/zh
Priority to JP2005196562A priority patent/JP2006189239A/ja
Priority to US11/303,575 priority patent/US20060137859A1/en
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    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/20—Cooling means
    • G06F1/203—Cooling means for portable computers, e.g. for laptops
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2245/00—Coatings; Surface treatments
    • F28F2245/02—Coatings; Surface treatments hydrophilic

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Sustainable Development (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

一热管，包括一壳体及分布于壳体内壁的若干沟槽，其中沟槽表面设有一层由亲水性材料形成的亲水层。本实用新型热管在沟槽表面贴附一层亲水层，使冷凝的工作液体被吸附而形成一层液膜，使蒸汽扩散与液体回流的交界面之间的剪切力降低，从而加大热管内工作液体的循环速度，提升其传热性能并保证高效传热。

Description

热管
【技术领域】
本实用新型涉及一种热管，特别是指一种具有良好散热效果的扁平热管。
【背景技术】
热管作为一种传热装置，其是在密封低压导热性能良好的金属壳体内盛装适量工作液体，并利用工作液体在壳体内作气液两相间转化时而吸收或放出大量热的原理进行工作的。工作液体通常选用汽化热高、流动性好、化学性质稳定、沸点较低的液态物质，如水、乙醇、丙酮等。当热管一端与热源接触吸收热量时，其内的工作液体受热蒸发并吸收大量的汽化热，形成的汽体快速扩散至热管的另一端进行冷却而放出热量，冷却后再次形成液体并沿壳体内壁回流，如此往复循环即可将热源产生的热量从热管一端传递至另一端而散发出去。为加速冷却后液体的回流速度，通常在壳体内壁上还设置有毛细结构，该毛细结构通常为细小的沟槽，在毛细结构的毛细吸附力作用下，大大加速液体的回流速度。由于热管内的工作液体循环速度快，因此传热效率高，目前热管在散热领域得到广泛而大量的应用。在使用过程中，通常将热管受热的一端称为蒸发段，冷却的一端称为冷凝段。
图1所示即为一种传统的热管10，其具有一密封的金属壳体102，壳体102内容腔103抽成低压，并充填有一定量的工作液体(图未示)。在壳体102内壁附设有毛细结构，该毛细结构为沿壳体102内壁纵向延伸的沟槽104，如图2所示。在使用时，热管10的一端作为蒸发段A从热源处吸收热量，另一端作为冷凝段B放出热量，工作液体吸热汽化后的蒸汽由蒸发段A向冷凝段B扩散，冷却后的工作液体沿壳体102的内壁回流。
由于笔记型电脑朝着轻、薄、短、小的方向发展，当该热管10用于笔记型电脑散热模组时，通常需要先将热管10压成扁平状以满足笔记型电脑内空间限制。但热管10直径较小，当将其压扁后使热管10的壳体102间的距离减小，蒸汽在冷凝段B冷凝后聚集形成的液滴使壳体102间的距离进一步减小，导致蒸汽扩散与液体回流的交界面会产生一相互作用的剪切力，该剪切力一方面阻止液体向蒸发段A回流，另一方面阻碍蒸汽往冷凝段B扩散。由于该剪切力的存在，使热管10内工作液体的循环速度大大减慢，降低了热管10的传热性能，对壳体102直径较小的长热管而言，甚至出现冷凝后的液体无法顺利回流至蒸发段A进行循环散热，因此，为保证热管高效传热，上述剪切力的影响不容忽视。
【发明内容】
本实用新型的目的在于提供一种热管，其具有高效的传热性能。
本实用新型的目的是通过下列技术方案实现的：本实用新型热管包括一壳体及分布于壳体内壁的若干沟槽，其中沟槽表面设有一层由亲水性材料形成的亲水层。
本实用新型热管在沟槽表面贴附一层亲水层，使冷凝的工作液体被吸附而形成一层液膜，使蒸汽扩散与液体回流的交界面之间的剪切力降低，从而加大热管内工作液体的循环速度，提升其传热性能并保证高效传热。
下面结合附图和实施例对本实用新型进一步说明。
【附图说明】
图1是现有热管的轴向剖视图。
图2是图1沿II-II向剖视图。
图3是本实用新型热管的轴向剖视图。
图4是图3沿IV-IV向的剖面图。
【具体实施方式】
请参阅图3至图4，本实用新型热管20具有一扁平状的壳体22，及沿壳体22内壁纵向延伸、且具有毛细作用的若干沟槽24，以及贴附于沟槽24表面的、由亲水性材料形成的亲水层26。本实用新型热管20可通过压扁管形热管制成。
壳体22是由铜、铝等导热性能较佳的金属材料制成，其两端封闭并在内部形成一密闭容腔，该容腔被抽成低压状态并装有一定量的工作液体，如水、乙醇、丙酮等。壳体22的一端作为蒸发段来吸收热源的热量，另一端作为冷凝段散发热量。
沟槽24既可引导吸收热量蒸发后呈气态的工作液体流向冷凝段，也可为在冷凝段冷凝成液态的工作流体提供回流的动力以流回蒸发段再次吸收热。
亲水层26是由具有亲水特性的材料如树脂或其他有机类材料形成。通过涂布、镀膜等方法可将具有亲水特性的材料贴附于沟槽24表面而形成亲水层26。亲水层26利用其亲水性将冷凝的工作液体吸附而形成一层液膜，避免冷凝的工作液体聚集成滴。这可有效减小由于热管20的壳体22内间距过小、冷凝的工作液体聚集成滴所造成的蒸汽扩散与液体回流交界面之间的较大的剪切力。
在热管20工作时，蒸发段内的工作液体受热汽化，形成的蒸汽扩散至冷凝段，扩散至冷凝段的蒸汽在该段放热冷凝成液态后，被亲水层26吸附而形成一层液膜，再沿壳体22内壁的沟槽24而回流至蒸发段，如此往复循环而将热量快速从蒸发段传递到冷凝段并散发出去。较传统的沟槽形热管而言，本实用新型热管20在沟槽24表面贴附一层亲水层26，使冷凝的工作液体被吸附而形成一层液膜，使蒸汽扩散与液体回流的交界面之间的剪切力降低，从而加大热管20内工作液体的循环速度，提升其传热性能并保证高效传热。

Claims (5)

1.一种热管，包括一壳体及分布于壳体内壁的若干沟槽，其特征在于：沟槽表面设有一层由亲水性材料形成的亲水层。
2.如权利要求1所述的热管，其特征在于：该沟槽沿壳体内壁纵向延伸。
3.如权利要求1或2所述的热管，其特征在于：该亲水层是由树脂形成。
4.如权利要求1或2所述的热管，其特征在于：该亲水层是由具有亲水特性的有机类材料形成。
5.如权利要求1或2所述的热管，其特征在于：该壳体呈扁平状。
CN200420103587.0U 2004-12-29 2004-12-29 热管 Expired - Lifetime CN2784853Y (zh)

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CN200420103587.0U CN2784853Y (zh) 2004-12-29 2004-12-29 热管
JP2005196562A JP2006189239A (ja) 2004-12-29 2005-07-05 ヒートパイプ
US11/303,575 US20060137859A1 (en) 2004-12-29 2005-12-16 Heat pipe with high heat dissipating efficiency

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104634148A (zh) * 2015-03-04 2015-05-20 广东工业大学 一种纳米结构平板热管
CN109585968A (zh) * 2017-09-28 2019-04-05 现代自动车株式会社 用于车辆的电池冷却系统
TWI703302B (zh) * 2019-07-19 2020-09-01 大陸商深圳興奇宏科技有限公司 散熱裝置
US11435144B2 (en) 2019-08-05 2022-09-06 Asia Vital Components (China) Co., Ltd. Heat dissipation device

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* Cited by examiner, † Cited by third party
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US20070151708A1 (en) * 2005-12-30 2007-07-05 Touzov Igor V Heat pipes with self assembled compositions
CN101478868B (zh) * 2009-01-23 2012-06-13 北京奇宏科技研发中心有限公司 散热装置
US8434225B2 (en) 2009-04-07 2013-05-07 University Of Central Florida Research Foundation, Inc. Hydrophilic particle enhanced heat exchange and method of manufacture
US8235096B1 (en) * 2009-04-07 2012-08-07 University Of Central Florida Research Foundation, Inc. Hydrophilic particle enhanced phase change-based heat exchange
BRPI0924849B1 (pt) * 2009-06-17 2019-12-31 Huawei Tech Co Ltd dispositivo de dissipação de calor e módulo de frequência de rádio com o mesmo
US20130008634A1 (en) 2011-07-05 2013-01-10 Hsiu-Wei Yang Heat dissipation unit and manufacturing method thereof and thermal module thereof
US20140096940A1 (en) * 2012-10-10 2014-04-10 Novel Concepts, Inc. Heat Spreader With Thermal Conductivity Inversely Proportional To Increasing Heat
US9578791B1 (en) * 2015-08-17 2017-02-21 Asia Vital Components Co., Ltd. Internal frame structure with heat isolation effect and electronic apparatus with the internal frame structure

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CA2179448A1 (en) * 1995-07-12 1997-01-13 Atsuyumi Ishikawa Heat exchanger for refrigerating cycle
US7258160B2 (en) * 2002-09-25 2007-08-21 Sony Corporation Heat transfer element, cooling device and electronic device having the element
US7011145B2 (en) * 2004-07-12 2006-03-14 Industrial Technology Research Institute Method for enhancing mobility of working fluid in liquid/gas phase heat dissipating device
US6997244B2 (en) * 2004-07-16 2006-02-14 Hsu Hul-Chun Wick structure of heat pipe
US7134485B2 (en) * 2004-07-16 2006-11-14 Hsu Hul-Chun Wick structure of heat pipe
US7293601B2 (en) * 2005-06-15 2007-11-13 Top Way Thermal Management Co., Ltd. Thermoduct

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104634148A (zh) * 2015-03-04 2015-05-20 广东工业大学 一种纳米结构平板热管
CN104634148B (zh) * 2015-03-04 2016-08-17 广东工业大学 一种纳米结构平板热管
CN109585968A (zh) * 2017-09-28 2019-04-05 现代自动车株式会社 用于车辆的电池冷却系统
TWI703302B (zh) * 2019-07-19 2020-09-01 大陸商深圳興奇宏科技有限公司 散熱裝置
US11435144B2 (en) 2019-08-05 2022-09-06 Asia Vital Components (China) Co., Ltd. Heat dissipation device

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JP2006189239A (ja) 2006-07-20

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