CN101641005B - 散热装置 - Google Patents

散热装置 Download PDF

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CN101641005B
CN101641005B CN2008103032757A CN200810303275A CN101641005B CN 101641005 B CN101641005 B CN 101641005B CN 2008103032757 A CN2008103032757 A CN 2008103032757A CN 200810303275 A CN200810303275 A CN 200810303275A CN 101641005 B CN101641005 B CN 101641005B
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CN101641005A (zh
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查新祥
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Shenzhen Qichuangmei Tech Co Ltd
State Grid Tianjin Electric Power Co Ltd
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Hong Jun Precision Industry Co ltd
Fuzhun Precision Industry Shenzhen Co Ltd
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/34Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/42Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
    • H01L23/427Cooling by change of state, e.g. use of heat pipes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00Heat-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
    • F28D15/02Heat-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
    • F28D15/0275Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/34Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/46Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
    • H01L23/467Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing gases, e.g. air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00Heat-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
    • F28D15/02Heat-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
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12Tubular 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
    • F28F1/24Tubular 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
    • F28F1/32Tubular 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 the means having portions engaging further tubular elements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • HELECTRICITY
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    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L23/00Details of semiconductor or other solid state devices
    • H01L23/34Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
    • H01L23/36Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
    • H01L23/367Cooling facilitated by shape of device
    • H01L23/3672Foil-like cooling fins or heat sinks
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2924/00Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
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Abstract

一种散热装置,包括散热器及热管,所述散热器包括间隔设置的若干散热鳍片,每相邻的两散热鳍片之间形成供气流通过的气流通道,每一散热鳍片上设有供热管穿设的通孔,每一散热鳍片于靠近通孔的位置设有导引部,所述导引部包括两个凸起,所述两个凸起凸出于散热鳍片的一侧,并分布于通孔的两侧,所述两个凸起的迎风端相互远离,使所述导引部的两个凸起之间于气流行进方向上排布形成渐缩状的导流通道,所述导流通道将气流导向热管处,所述导引部上设有切口,所述切口连通两相邻的气流通道,以破坏散热鳍片表面的层流层,每一凸起远离导流通道的侧边与散热鳍片平滑连接。

Description

散热装置
技术领域
本发明涉及一种散热装置,尤其是指一种用于对发热电子元件进行散热的散热装置。
背景技术
随着电子信息产业的快速发展,中央处理器等发热电子元件高速、高频及集成化使其发热量剧增,如不及时排除这些热量,将引起发热电子元件自身温度的升高,进而导致发热电子元件的损坏或其性能的降低。因此,需要对发热电子元件进行散热。目前,业者常用的散热方式是在发热电子元件表面装设一散热装置。
该散热装置一般包括一散热器、设于散热器上的一风扇及穿设于散热器上的若干热管。该散热器包括若干散热鳍片,这些散热鳍片为平整结构,相邻两散热鳍片之间形成一直型气流通道,每一散热鳍片上设有通孔。该热管包括一蒸发部及一冷凝部,该蒸发部与一发热电子元件热接触,该冷凝部穿插于散热鳍片上的通孔中。散热器工作时,热管的蒸发部将发热电子元件产生的热量传至冷凝部,然后再传至散热鳍片,由于散热鳍片存在一定的热阻,因此,热管周围的散热鳍片的温度较高,而由风扇产生的气流在流经热管时,由于受热管的阻挡,而在热管的后方形成一空气热旋窝,不利于热管的散热,影响散热装置的散热效果。同时,风扇产生的气流在流经散热鳍片间形成的气流通道时,由于散热鳍片的表面对气流的粘滞力,使流经气流通道的气流在散热鳍片的表面形成层流层,该层流层中的气流流速低,并且沿着散热鳍片的表面流动,从而阻碍了层流层以外的气流与散热鳍片进行对流,进一步影响散热装置的散热效果。
发明内容
有鉴于此,有必要提供一种散热效果较佳的散热装置。
一种散热装置,包括散热器及热管,所述散热器包括间隔设置的若干散热鳍片,每相邻的两散热鳍片之间形成供气流通过的气流通道,每一散热鳍片上设有供热管穿设的通孔,每一散热鳍片于靠近通孔的位置设有导引部,所述导引部包括两个凸起,所述两个凸起凸出于散热鳍片的一侧,并分布于通孔的两侧,所述两个凸起的迎风端相互远离,使所述导引部的两个凸起之间于气流行进方向上排布形成渐缩状的导流通道,所述导流通道将气流导向热管处,所述导引部上设有切口,所述切口连通两相邻的气流通道,每一凸起远离导流通道的侧边与散热鳍片平滑连接。
一种散热装置,包括散热器及热管,所述散热器包括间隔设置的多个散热鳍片,相邻的散热鳍片之间形成供气流通过的气流通道,所述散热鳍片的本体上设有供热管穿设的通孔,所述散热鳍片的本体上于靠近通孔的位置向外凸出设有两个凸起,所述两个凸起凸出于散热鳍片的一侧,并分布于通孔的两侧,所述两个凸起的迎风端相互远离,沿气流行进的方向上所述两个凸起之间排布形成由迎风端向背风端呈渐缩状的导流通道,所述导流通道将气流汇集并导引至热管处,所述每一凸起于面向气流的一侧形成切口,所述切口将相邻的气流通道连通,每一凸起远离导流通道的侧边与散热鳍片平滑连接。
与现有技术相比,本发明散热装置,在散热鳍片上靠近热管的位置处设置导引部,且导引部于气流行进方向上排布形成渐缩状的导流通道,该渐缩状的导流通道可以将气流导向热管处,增强了热管处的热交换,减弱了热管后方的热旋窝对散热的影响,同时在导引部上设置切口可以破坏散热鳍片表面的层流层,增强了气流在散热鳍片之间的紊流效果,从而从两个方面提升了散热器的散热效果。
附图说明
图1为本发明第一实施例的散热装置的立体组装图。
图2为图1所示散热装置中的散热鳍片的立体图。
图3为图2所示散热鳍片的另一角度的立体图。
图4为本发明第二实施例的散热装置中的散热鳍片的立体图。
图5为图4所示的散热鳍片的另一角度的立体图。
图6为本发明第三实施例的散热装置中的散热鳍片的立体图。
图7为图6所示的散热鳍片的另一角度的立体图。
具体实施方式
下面参照附图结合实施例对本发明作进一步的说明。
请参照图1,本发明第一实施例的散热装置包括一散热器10及与该散热器10结合的一热管12。该热管12具有一蒸发段121及一冷凝段122,该蒸发段121与一发热电子元件(图未示)热连接,该冷凝段122穿插于该散热器10上,以将发热电子元件产生的热量传递至该散热器10。该散热器10及热管12可与一风扇(图未示)配合使用,该风扇可以为系统风扇,也可以为装在散热器10上的风扇,该风扇产生的气流沿图1中箭头F所示的方向流向该散热器10,以将散热器10上的热量散发到周围的空气中。
该散热器10由若干相互平行的散热鳍片11堆叠排列而成,每相邻的两散热鳍片11之间形成一气流通道13。如图2及图3所示,每一散热鳍片11包括一平板状的矩形本体110,该本体110的中部设有一通孔111,以用于收容该热管12的冷凝段122。该本体110自通孔111的周缘垂直向外延伸形成一环形凸缘112。该本体110于靠近该通孔111的位置设有一导引部113,该导引部113包括两个条形的凸起114,这两个凸起114从该本体110上冲压形成,从而使这两个凸起114凸出于该本体110的一侧,并使该本体110的另一侧对应每一凸起114的位置各形成一凹陷115(请参照图3)。该两凸起114对称分布于该通孔111的上下两侧,且沿气流前进方向上排布在通孔111的前端,该两凸起114自远离通孔111的位置指向通孔111,其靠近通孔111的一端相互靠近,远离通孔111的一端相互远离,使该两凸起114与通孔111之间排布形成“V”形,即上述两个凸起114之间的距离自靠近通孔111的位置向远离通孔111的位置逐渐增加,使该两凸起114间形成一定指向该通孔111的夹角,从而使导引部113在气流前进方向上由迎风端向背风端呈一渐缩状结构,并于导引部113的两凸起114之间形成由迎风端向背风端呈渐缩状的导流通道1131。该两凸起114凸出于本体110的高度小于凸缘112的高度,以于散热鳍片11组装在一起时,该两凸起114的顶端与相邻的另一散热鳍片11间隔一定距离而不相碰触。本实施例中,两凸起114凸出于本体110的高度刚好能使两凸起114的顶部位于气流通道13的中间,使流经气流通道13的气流一部分被导引部113导流,一部分沿着原来的方向继续流动。每一凸起114于靠近导流通道1131的侧边呈直线状,该直线状的侧边面向导流通道1131,每一凸起114远离导流通道1131的侧边大致呈“C”形并与本体110平滑相连。该直线状的侧边上设有一切口116,该切口116也自远离通孔111的位置指向通孔111,该切口116朝向导流通道1131设置且与凸起114的凹陷115连通,以将散热器10中相邻的两气流通道13通过切口116连通,每一凸起114的切口116正对另一凸起114的切口116。
该散热装置工作时,风扇产生的气流沿图中箭头F所示方向进入气流通道13,由于该散热鳍片11上设有导引部113,且该导引部113的两凸起114在气流行进方向上于通孔111的前方排布形成渐缩状的导流通道1131,使进入气流通道13的气流在导引部113的导引下沿该导流通道1131流向热管12处,即热量密集区,使热量密集区内的热量快速地被气流带走,有利于提高散热装置的散热效率。同时,由于该导引部113的凸起114上设有切口116,进入气流通道13的部分气流,特别是形成于散热鳍片11表面的层流层的气流,通过切口116进入另一相邻的气流通道13,而每一气流通道13中两层流层之间的较冷的气流则被两凸起114导向热管12处,从而既破坏了散热鳍片11表面的层流层,增强了气流在散热鳍片11之间的紊流效果,又减弱了热管12背后的热旋窝对散热的影响,提高了散热装置的散热效率。
另外,当散热器10工作时,热管12快速地将发热电子元件产生的热量传递至散热鳍片11,此时热管12相当于是散热鳍片11上的一个热源,热管12上的热量将自通孔111的外缘向本体110上远离通孔111的位置传递,而切口116自远离通孔111的位置指向通孔111设置,不会影响通孔111周围的热量的传递。
当然,上述散热装置中的散热鳍片11还可为其他结构。图4和图5所示为本发明第二实施例的散热装置中的散热鳍片11a。本实施例中,该导引部113a的两个凸起114a均大致呈弧形,该本体110a的另一侧对应每一凸起114a的位置各形成一弧形的凹陷115a。该两凸起114a对称分布于靠近通孔111的位置,并围绕在通孔111的周围,其中一个凸起114a沿气流行进的方向上从通孔111的上方弯曲延伸至通孔111的后方,另一凸起114a沿气流行进的方向上从通孔111的下方弯曲延伸至通孔111的后方,所述两个凸起114a排布成“C”形。每一凸起114a均具有与通孔111相对的弧形内侧边及与内侧边相对的弧形外侧边。每一凸起114a的内侧边与外侧边间的距离沿气流行进方向上逐渐减小,即每一凸起114a的宽度自迎风端向背风端逐渐减小,即较宽的一端形成于迎风一端,较窄的一端形成于背风一端。该两凸起114a之间的距离由迎风端向背风端逐渐减小,即两凸起114a于迎风端相互远离,而于背风端相互靠近,从而使该导引部113a形成一渐缩状结构,而于两凸起114a之间形成一导流通道1131a。每一凸起114a凸出于本体的高度自靠近通孔111的内侧向外侧,且由迎风端向背风端均逐渐减小,直至与本体110a平滑连接。每一凸起114a的迎风端的侧边为直线形,且于该直线形侧边上设有一切口116a,该切口116a正对气流方向设置且自远离通孔111的位置指向通孔111,该切口116a的高度自靠近通孔111向远离通孔111的方向逐渐减小。每一凸起114a及其切口116a沿不同方向上高度的渐变,有利于气流的过渡,以减小气流噪音。
图6和图7所示为本发明第三实施例的散热装置中的散热鳍片11b,该散热鳍片11b与本发明第二实施例中的散热鳍片11a类似,其不同之处在于:本实施例中该导引部113b为一“C”形的凸起,该本体110b的另一侧对应该导引部113b的位置形成一“C”形的凹陷115b,该导引部113b的内侧形成一渐缩状的导流通道1131b,相当于将第二实施例中的两凸起114a的两较窄的末端即背风端连接为一体。该导引部113b迎风端的两侧边呈直线形,且于该两侧边上各设一切口116b。该切口116b自远离通孔111的位置指向通孔111。

Claims (12)

1.一种散热装置,包括散热器及热管,所述散热器包括间隔设置的若干散热鳍片,每相邻的两散热鳍片之间形成供气流通过的气流通道,每一散热鳍片上设有供热管穿设的通孔,其特征在于:每一散热鳍片于靠近通孔的位置设有导引部,所述导引部包括两个凸起,所述两个凸起凸出于散热鳍片的一侧,并分布于通孔的两侧,所述两个凸起的迎风端相互远离,使所述导引部的两个凸起之间于气流行进方向上排布形成渐缩状的导流通道,所述导流通道将气流导向热管处,所述导引部上设有切口,所述切口连通两相邻的气流通道,每一凸起远离导流通道的侧边与散热鳍片平滑连接。
2.如权利要求1所述的散热装置,其特征在于:所述切口自远离通孔的位置指向通孔。
3.如权利要求1所述的散热装置,其特征在于:所述两个凸起均呈条形,所述两个凸起成一夹角且均指向通孔,以使所述两个凸起形成渐缩状结构。
4.如权利要求3所述的散热装置,其特征在于:所述每一凸起靠近气流通道的一侧边上设有所述切口。
5.如权利要求1所述的散热装置,其特征在于:所述两个凸起呈弧形并围绕在通孔的外围。
6.如权利要求5所述的散热装置,其特征在于:每一凸起的宽度自迎风端向背风端逐渐减小,两个凸起的背风端相互靠近,每一凸起的迎风端的侧边上设有所述切口。
7.如权利要求5所述的散热装置,其特征在于:每一凸起的高度由靠近通孔的内侧向外侧、由迎风端向背风端均逐渐减小。
8.如权利要求5所述的散热装置,其特征在于:所述凸起的背风端连接为一体。
9.一种散热装置,包括散热器及热管,所述散热器包括间隔设置的多个散热鳍片,相邻的散热鳍片之间形成供气流通过的气流通道,所述散热鳍片的本体上设有供热管穿设的通孔,其特征在于:所述散热鳍片的本体上于靠近通孔的位置向外凸出设有两个凸起,所述两个凸起凸出于散热鳍片的一侧,并分布于通孔的两侧,所述两个凸起的迎风端相互远离,沿气流行进的方向上所述两个凸起之间排布形成由迎风端向背风端呈渐缩状的导流通道,所述导流通道将气流汇集并导引至热管处,所述每一凸起于面向气流的一侧形成切口,所述切口将相邻的气流通道连通,每一凸起远离导流通道的侧边与散热鳍片平滑连接。
10.如权利要求9所述的散热装置,其特征在于:所述两个凸起分别从远离通孔的位置指向通孔,所述两个凸起沿气流行进的方向上排布在通孔的前端,所述两个凸起与通孔之间排布成“V”形,所述每一凸起的切口朝向导流通道设置。
11.如权利要求9所述的散热装置,其特征在于:所述两个凸起均呈弧形围绕设置在通孔的周围,其中一个凸起沿气流行进的方向上从通孔的上端弯曲延伸至通孔的后端,另一凸起沿气流行进的方向上从通孔的下端弯曲延伸至通孔的后端,所述两个凸起排布成“C”形,所述两个凸起于背风端相互靠近,所述每一凸起的切口正对气流方向设置。
12.如权利要求11所述的散热装置,其特征在于:所述两个凸起于背风端相连。
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