CN100493317C - 散热器 - Google Patents

散热器 Download PDF

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Publication number
CN100493317C
CN100493317C CNB2005101005662A CN200510100566A CN100493317C CN 100493317 C CN100493317 C CN 100493317C CN B2005101005662 A CNB2005101005662 A CN B2005101005662A CN 200510100566 A CN200510100566 A CN 200510100566A CN 100493317 C CN100493317 C CN 100493317C
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protuberance
radiating fin
radiator
heat pipe
radiating
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CN1953648A (zh
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黄清白
朱习剑
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Fuzhun Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Fuzhun Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
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Priority to US11/309,067 priority patent/US20070089869A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • 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
    • F28D15/0275—Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H01L23/367—Cooling facilitated by shape of device
    • H01L23/3672—Foil-like cooling fins or heat sinks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00—Details of semiconductor or other solid state devices
    • H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
    • H01L23/467—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing gases, e.g. air
    • 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
    • F28D15/0266—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 separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F28F2215/10—Secondary fins, e.g. projections or recesses on main fins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
    • H01L2924/0001—Technical content checked by a classifier
    • H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Geometry (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

一种散热器，包括若干散热鳍片，各散热鳍片包括一本体，所述本体间形成使气流经过的气流通道，该本体上设有至少一向相邻散热鳍片的本体凸伸的凸出部，该凸出部的凸出高度由该凸出部的中部向该凸出部与本体的接合部位逐渐减小，以在该凸出部上形成二相交于凸出部中部的流线型导引面。

Description

散热器
【技术领域】
本发明是关于一种散热器，特别是关于一种具较高散热效率的散热器。
【背景技术】
现有散热装置一般包括一散热器及一提供强制气流的散热风扇。该散热器设有若干平板状的散热鳍片，其中各相邻散热鳍片间形成使该强制气流经过的气流通道，该散热装置利用该气流通道内的强制气流与散热鳍片间的热交换实现对发热电子元件的散热。
在该散热装置的散热过程中，由于粘性作用的影响，该强制气流在气流通道内的流动为层流或紊流流动。通常紊流流动会增强散热鳍片与强制气流间的热交换。即使是紊流流动时，在散热鳍片表面与强制气流的接触部分有一层流底层，此层流底层厚度的增加会降低散热鳍片与强制气流间的热交换效率。因此，如何破坏此层流底层的形成与发展是提高散热鳍片与散热风扇产生的强制气流间的热交换效率，从而提升整个散热装置散热效率的关键问题之一。
【发明内容】
有鉴于此，下面以具体实施例说明一种具较高散热效率的散热器。
一种散热器，包括若干散热鳍片，各散热鳍片包括一本体，所述本体间形成使气流经过的气流通道，该本体上设有至少一向相邻散热鳍片的本体凸伸的凸出部，该凸出部的凸出高度由该凸出部的中部向该凸出部与本体的接合部位逐渐减小，以在该凸出部上形成二相交于凸出部中部的流线型导引面。
作为本发明的进一步改进，该散热器还包括至少一与所述散热鳍片热连接的热管。
由于该凸出部凸伸出散热鳍片的本体，因此，当气流经过该凸出部时在凸出部的影响下可产生涡流作用，该涡流作用可增加气流的扰动，破坏散热鳍片本体附近层流底层的增长和发展，有助于提高散热鳍片表面的热交换系数，从而减小散热鳍片处的热交换热阻，提升散热鳍片表面的热交换效果，提高整个散热器的性能；该凸出部的设置还可增加整个散热器的散热面积，提高该散热器的散热效率；该导引面可将部分气流导引至热管处，更有利于热管处热量的散发，对整个散热器散热效率的提升产生有益效果。
【附图说明】
下面参照附图结合实施例作进一步描述：
图1为该散热器的立体图；
图2为该散热器中单个散热鳍片的立体图；
图3为该散热器第二实施例的立体图；
图4为该散热器第三实施例中散热鳍片的立体图。
【具体实施方式】
本发明所述的散热器10可与一散热风扇配合使用，使该散热风扇产生的气流沿一定方向吹向该散热器10。如图1及图2所示，该散热器10包括一由若干相互平行的散热鳍片12堆叠形成的鳍片组及一穿设于该鳍片组内的热管14，该热管14可与一发热元件相接触，将该发热元件产生的热量传递至该鳍片组。
该散热鳍片12包括一矩形本体122，该本体122上、下两端分别弯折形成有垂直于该本体122的翼片123，各散热鳍片12的翼片123分别与前一散热鳍片12的本体122相抵靠，使各相邻的二散热鳍片12间存在一定的间距，从而在所述散热鳍片12的本体122间形成使气流经过的气流通道。该本体122靠近上端的位置开设一收容热管14的收容孔124，该收容孔124边缘向本体122的一侧凸伸形成有与热管14相接触的接触部125，该接触部125可增大热管14与散热鳍片12间的接触面积，从而增加热管14与散热鳍片12间的传热量。该散热鳍片12的本体122上还设置一向一相邻散热鳍片12的本体122凸伸的凸出部126，该凸出部126于该散热鳍片12本体122上的延伸方向与气流的行进方向间形成一钝角，由该本体122的右下角延伸至靠近该本体122左上角的热管14处，可将靠近本体122下端的部分气流引导至位于本体122上端的热管14处，增加热管14处的散热效率。该凸出部126与散热鳍片12的本体122的接合部位为菱形，且该凸出部126的凸出高度自该凸出部126的中部向该凸出部126与本体122的接合部位逐渐减小，在该凸出部126上形成二相交于凸出部126中部的流线型导引面127，该流线型的设计可降低气流沿所述导引面127向热管14处运动或跨越该凸出部126前进时受到的阻力，更有利于气流通道内气流的运动。
工作时，该热管14由发热元件处吸收热量，将该发热元件产生的热量传递至该鳍片组，然后通过该散热风扇产生的气流与散热鳍片12间的热交换将该热量散发出去。
该工作过程中，当散热风扇产生的气流到达该凸出部126时，沿着该凸出部126的导引面127向前运动，将部分气流导引至热管14附近，使吹向热管14处的气流流量较大，从而使该气流由热管14处带走较多的热量，增加热管14处的散热效率；由于该凸出部126凸伸出散热鳍片12的本体122，因此，当气流经过该凸出部126时在凸出部126的影响下可产生涡流作用，该涡流作用可增加气流的扰动，破坏散热鳍片12本体122附近层流底层的增长和发展，有助于提高散热鳍片12表面的热交换系数，从而减小散热鳍片12处的热阻，提升散热鳍片12表面的热交换效果，提高整个散热器10的性能；该凸出部126的设置还可增加整个散热器10的散热面积，提高该散热器10的散热效率。
该鳍片组内也可穿设多根热管14，并设置延伸至所述热管14处的一个或多个凸出部126，如图3及图4所示即为该散热鳍片12’上设置多个凸出部126’的情况，所述凸出部126’于该散热鳍片12’本体122上的延伸方向可相互平行或存在一定的夹角，且保证其中至少一凸出部126’由散热鳍片12’本体122上远离热管14的一个边角向靠近与该边角相对的另一边角的位置延伸，将部分气流导引至热管14处，以便于热管14处热量的散发。当所述凸出部126’的延伸方向间存在一定夹角时，沿所述凸出部126’流向收容于收容孔124内的热管14处的气流方向不相同，所述沿不同方向流向热管14处的气流相互作用，可进一步增加热管14处气流的扰动，提高该散热器10’的散热效率。当该散热鳍片12’上设置多个凸出部126’时，所述凸出部126’的凸伸方向可进行合理分配，使所述凸出部126’沿相同的方向向与该散热鳍片12’相邻之一个散热鳍片12’的本体122凸伸，或分别向与该散热鳍片12’相邻的二散热鳍片12’的本体122凸伸。
另外，该凸出部126与散热鳍片12的本体122的接合部位可为椭圆形等其它形状，保证每个凸出部126的凸出高度由该凸出部126中部向该凸出部126与散热鳍片12本体122的接合部位逐渐减小。当设置多个凸出部126时，所述凸出部126与散热鳍片12的本体122的接合部位可为相同或不同形状。本发明中，热管14与散热鳍片12的结合方式不限于穿设，该热管14也可搭设于该散热鳍片12的本体122的壁部，使该热管14与散热鳍片12热连接。

Claims (9)

1.一种散热器，包括若干散热鳍片，各散热鳍片包括一本体，所述本体间形成使气流经过的气流通道，其特征在于：该本体上设有至少一向相邻散热鳍片的本体凸伸的凸出部，该凸出部的凸出高度由该凸出部的中部向该凸出部与本体的接合部位逐渐减小，以在该凸出部上形成二相交于凸出部中部的流线型导引面。
2.如权利要求1所述的散热器，其特征在于：该凸出部与散热鳍片本体的接合部位为菱形与椭圆形至少其中之一。
3.如权利要求1所述的散热器，其特征在于：该凸出部于该散热鳍片本体上的延伸方向与气流的行进方向间形成一钝角。
4.如权利要求1所述的散热器，其特征在于：该散热器进一步包括与该散热鳍片热连接的至少一热管。
5.如权利要求4所述的散热器，其特征在于：该热管穿设于该散热鳍片的本体上开设的至少一收容孔内。
6.如权利要求4所述的散热器，其特征在于：该热管搭设于该散热鳍片的本体的壁部。
7.如权利要求4所述的散热器，其特征在于：本体上设有多个凸出部，所述凸出部沿相同的方向向靠近热管的位置延伸。
8.如权利要求4所述的散热器，其特征在于：该本体上设有多个凸出部，所述凸出部沿不同的方向向靠近热管的位置延伸。
9.如权利要求7或8所述的散热器，其特征在于：所述凸出部向与该散热鳍片相邻的一个或两个散热鳍片的本体凸伸。
CNB2005101005662A 2005-10-21 2005-10-21 散热器 Expired - Fee Related CN100493317C (zh)

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CNB2005101005662A CN100493317C (zh) 2005-10-21 2005-10-21 散热器
US11/309,067 US20070089869A1 (en) 2005-10-21 2006-06-15 Heat sink

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CN101641005B (zh) * 2008-07-31 2011-08-31 富准精密工业(深圳)有限公司 散热装置
US8359745B2 (en) * 2009-07-29 2013-01-29 Cpumate Inc. Method for manufacturing a heat sink
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CN102083296A (zh) * 2009-11-27 2011-06-01 鸿富锦精密工业（深圳）有限公司 散热装置
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