WO2015089915A1 - 散热回路管及用该散热回路管的背光模组 - Google Patents

散热回路管及用该散热回路管的背光模组 Download PDF

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Publication number
WO2015089915A1
WO2015089915A1 PCT/CN2014/070117 CN2014070117W WO2015089915A1 WO 2015089915 A1 WO2015089915 A1 WO 2015089915A1 CN 2014070117 W CN2014070117 W CN 2014070117W WO 2015089915 A1 WO2015089915 A1 WO 2015089915A1
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WIPO (PCT)
Prior art keywords
liquid
gas
top plate
separation baffle
bottom plate
Prior art date
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Ceased
Application number
PCT/CN2014/070117
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English (en)
French (fr)
Inventor
俞刚
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.)
TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/235,565 priority Critical patent/US9426928B2/en
Publication of WO2015089915A1 publication Critical patent/WO2015089915A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
    • H05K7/20336—Heat pipes, e.g. wicks or capillary pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • 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
    • F28D15/043—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 forming loops, e.g. capillary pumped loops
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0085—Means for removing heat created by the light source from the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
    • H10W40/00—Arrangements for thermal protection or thermal control
    • H10W40/70—Fillings or auxiliary members in containers or in encapsulations for thermal protection or control
    • H10W40/73—Fillings or auxiliary members in containers or in encapsulations for thermal protection or control for cooling by change of state

Definitions

  • Liquid Crystal Display has many advantages such as thin body, power saving, and no radiation, and has been widely used.
  • Most of the liquid crystal display devices on the market are backlight type liquid crystal display devices, which include a liquid crystal display panel and a backlight module.
  • the operation of the liquid crystal display panel liquid crystal molecules are placed in the parallel glass substrate, and there are many vertical and horizontal small wires in the middle of the two glass substrates.
  • the light of the backlight module is directed to the screen. Since the liquid crystal display panel itself does not emit light, needs to provide a backlight module ⁇ t by means of the normal display image source, therefore, the backlight module the liquid crystal display backlight module become key components of the apparatus in accordance with the position of the incident light is different from the optical module and a direct Two types of backlight modules.
  • the direct-lit backlight module is provided with a light-emitting source disposed behind the liquid crystal display panel, and directly forms a surface light source to be provided to the liquid crystal display panel.
  • the side-lit backlight module is disposed on the edge of the back panel behind the liquid crystal display panel, and the light emitted by the light source enters the light guide plate from the light-incident surface of the light guide plate (LGP) side, and is reversed. After the radiation and diffusion, the light-emitting surface of the light guide plate is emitted, and then passed through the optical film group to form a surface light source to be supplied to the liquid crystal display panel.
  • LGP light-incident surface of the light guide plate
  • LED Light Emitting Diode
  • a heat circuit tube is usually disposed under a printed circuit board (PCB) on which a plurality of LED lamps are mounted to dissipate heat of the LED lamp.
  • PCB printed circuit board
  • FIG. 1 is a schematic structural diagram of a conventional LED heat dissipation loop tube, which comprises a liquid tube 100 , an evaporation portion 300 , a gas tube 500 and a condensation tube 700 .
  • the heat dissipation loop tube is filled with an easily heat absorbing volatile tube.
  • the heat dissipating liquid (including water, Freon refrigerant, ammonia, methanol, etc.), the heat dissipating liquid flows into the evaporation portion 300 through the liquid pipe 100, absorbs heat and volatilizes into a gas, enters the gas pipe 500, and then condenses into a liquid through the condenser 700, and then Re-enter the liquid tube 100, so Repeated use to improve heat dissipation.
  • the evaporation portion 300 includes an evaporation surface 302, a capillary structure 304, a gas passage 306, a cutoff plate 307, a compensation chamber 308, and a liquid phase chamber 309.
  • the heat dissipation loop tube is an alloy tube made of a metal such as copper or titanium, and an appropriate amount of working liquid (including water, Freon refrigerant, ammonia, decyl alcohol, etc.) is injected into the alloy tube in a vacuum, and the working liquid can absorb heat and evaporate.
  • working liquid including water, Freon refrigerant, ammonia, decyl alcohol, etc.
  • the LED module generally includes an LED unit 902 and a PCB board 904.
  • the PCB board 904 is disposed on the evaporation surface 302 of the evaporation portion 300, and the working liquid is input from the liquid tube 100 to the evaporation portion 300.
  • the liquid chamber 309 and the capillary structure 304 are sequentially passed through, and the heat of the external heat source is absorbed and converted into a gas.
  • the working liquid evaporated into a gas flows into the gas pipe 500 through the gas passage 306, and then condenses into a liquid through the condenser 700 to continue in the heat dissipation loop pipe. Used in the loop.
  • the evaporation portion 300 in the heat dissipation loop tube mainly separates the liquid through the capillary structure 304 and the cutoff plate 307.
  • the gas the flow passage of the gas in the structure is very narrow, the separation effect of the gas and the liquid is not very good, and the separation effect of the gas and the liquid directly affects the flow speed of the gas and the liquid, thereby affecting the heat dissipation of the heat dissipation loop tube effect.
  • the object of the present invention is to provide a heat dissipation loop tube which has a simple structure, low cost and good heat dissipation effect.
  • Another object of the present invention is to provide a backlight module that is provided with a heat dissipation loop between the backlight and the backplane to effectively improve the heat dissipation effect and ensure the quality of the backlight module.
  • the present invention provides a heat dissipation loop tube comprising: an evaporation portion, a liquid line connected to one end of the evaporation portion, a condensation line connected to one end of the liquid line away from the evaporation portion, and one end connected to the condensation line and The other end is connected to the gas line of the evaporating portion, and the evaporating portion includes a casing and a separating baffle disposed in the casing, and an accommodating space is formed in the casing, and the separating baffle is disposed in the accommodating space.
  • the accommodating space is divided into a liquid chamber and a gas chamber, the liquid line is in communication with the liquid chamber, and the gas line is in communication with the gas chamber, and the separating baffle is used for separating the liquid and the gas.
  • the housing comprises a bottom plate, a top plate disposed opposite the bottom plate, and a plurality of side plates disposed between the bottom plate and the top plate, the bottom plate.
  • the top plate and the side plate form the accommodating space.
  • One end of the separating baffle abuts against the bottom plate, and the other end is disposed against the top plate, and the separating baffle abuts against the top end of the top plate near the gas line, and divides the receiving space into the liquid on the left side Body cavity. And the gas moonlight on the right side.
  • the separation baffle is disposed in parallel between the bottom plate and the top plate, and divides the accommodating space into a liquid chamber located above and a gas chamber located below.
  • the separation baffle is made of a polymeric material.
  • the invention also provides a heat dissipation loop tube, comprising: an evaporation portion, a liquid pipeline connected to one end of the evaporation portion, a condensation pipeline connected to one end of the liquid pipeline away from the evaporation portion, and one end connected to the condensation pipeline and the other end connected to the evaporation portion
  • the gas line, the evaporating portion includes a casing and a separating baffle disposed in the casing, and an accommodating space is formed in the casing, and the separating baffle is disposed in the accommodating space to accommodate the accommodating space Dividing into a liquid chamber and a gas chamber, the liquid line is in communication with the liquid chamber, the gas line is in communication with the gas chamber, and the separation baffle is used for separating the liquid and the gas;
  • the housing includes a bottom plate, a top plate disposed opposite the bottom plate, and a plurality of side plates disposed between the bottom plate and the top plate.
  • the bottom plate, the top plate and the side plates form the receiving space.
  • One end of the separating baffle abuts against the bottom plate, the other end is disposed against the top plate, and the separating baffle abuts against the top end of the top plate adjacent to the gas pipe, and divides the receiving space into a liquid cavity on the left side and The gas chamber on the right side.
  • the separation baffle is disposed in parallel between the bottom plate and the top plate, and divides the accommodating space into a liquid chamber located above and a gas chamber located below.
  • the separation baffle is made of a polymeric material.
  • the invention also provides a backlight module, comprising: a back plate and a backlight disposed in the back plate.
  • a light guide plate disposed in the back plate and a heat dissipation circuit tube disposed in the back plate and located under the backlight
  • the heat dissipation circuit tube includes: an evaporation portion, a liquid pipeline connected to one end of the evaporation portion, and connected to the liquid pipeline away from a condensing line at one end of the evaporating portion and a gas line connected to the condensing line at one end and connected to the evaporating portion at the other end
  • the evaporating portion includes a casing and a separating baffle disposed in the casing, and an accommodating space is formed in the casing
  • the separation baffle is disposed in the accommodating space, and divides the accommodating space into a liquid chamber and a gas chamber, wherein the liquid pipeline communicates with the liquid chamber, and the gas pipeline communicates with the gas chamber.
  • the separation baffle is used
  • the housing includes a bottom plate, a top plate disposed opposite the bottom plate, and a plurality of side plates disposed between the bottom plate and the top plate.
  • the bottom plate, the top plate and the side plate form the accommodating space, and the backlight is disposed on the top plate .
  • One end of the separating baffle abuts against the bottom plate, the other end is disposed against the top plate, and the separating baffle abuts against the top end of the top plate adjacent to the gas pipe, and divides the receiving space into a liquid cavity on the left side and The gas chamber on the right side.
  • the separation baffle is disposed in parallel between the bottom plate and the top plate, and the accommodation space is divided into The upper liquid chamber and the gas chamber located below.
  • the separation baffle is made of a high molecular polymer material.
  • the heat dissipation loop tube of the present invention and the backlight module using the heat dissipation loop tube realize gas-liquid separation by a simple structure by providing a separation baffle in the evaporation portion, thereby effectively simplifying the structure of the heat dissipation loop tube
  • the cost of the heat dissipation loop tube is reduced, the separation effect of the liquid and the gas is improved, the circulation speed of the liquid gas is accelerated, the heat dissipation effect of the heat dissipation loop tube is improved, and the heat dissipation effect of the backlight module is improved.
  • the figure shows a schematic structural view of a conventional heat dissipation loop tube
  • FIG. 2 is a schematic structural view of a heat dissipation loop tube assembled on a backboard
  • Figure 3 is a schematic cross-sectional view of the evaporation portion of Figure i;
  • FIG. 4 is a schematic structural view of a first embodiment of a heat dissipation circuit tube according to the present invention.
  • Figure 5 is a schematic cross-sectional structural view of the evaporation portion of Figure 4.
  • FIG. 6 is a schematic structural view of a second embodiment of a heat dissipation circuit tube according to the present invention.
  • Figure 7 is a schematic cross-sectional structural view of the evaporation portion of Figure 6;
  • FIG. 8 is a schematic structural view of a backlight module of the present invention.
  • FIG. 9 is a schematic structural view of another embodiment of a backlight module of the present invention. Concrete real way
  • the present invention provides a heat dissipation circuit tube, comprising: an evaporation portion 2, a liquid pipeline 4 connected to the end of the evaporation portion 2, and a condensation pipeline connected to one end of the liquid pipeline 4 away from the evaporation portion 2 6 and a gas line 8 connected to the condensation line 6 at one end and connected to the evaporation portion 2 at the other end, the evaporation portion 2 includes a casing 22 and a separation baffle 24 disposed in the casing 22, and the casing 22 is formed therein.
  • the accommodating space 246 is disposed in the accommodating space 246, and the accommodating space 246 is divided into a liquid chamber 262 and a gas chamber 264, the liquid tube
  • the path 4 is in communication with a liquid chamber 262 that is in communication with a gas chamber 264 that is made of a polymeric polymeric material for separating liquid and gas, separated by the separation baffle 24
  • the liquid and the gas in the evaporation unit 2 are compared with the conventional evaporation unit, and the present invention effectively simplifies the structure of the evaporation unit 2, reduces the manufacturing cost of the evaporation unit 2, and reduces the manufacturing cost of the entire heat dissipation circuit tube.
  • the liquid is a heat-dissipating liquid, which is injected into the tube when the heat-dissipating circuit tube is fabricated, the evaporation portion 2 absorbs heat, and transfers the heat to the heat-dissipating liquid in the liquid chamber 262, and the heat-dissipating liquid absorbs the heat and vaporizes into a gas, and the gas wears
  • the separation baffle 24 enters the gas chamber 264 and is sent to the condensing line 6 through the gas line 8, and the gas is condensed into a liquid in the condensing line 6 and sent to the liquid chamber 262 through the liquid line 4, thus Loop to achieve heat dissipation.
  • the housing 22 includes a bottom plate 222 , a top plate 224 disposed opposite the bottom plate 222 , and a plurality of side plates 226 disposed between the bottom plate 222 and the top plate 224 .
  • the bottom plate 222 , the top plate 224 , and the side The plate 226 forms the accommodation space 246.
  • the upper surface of the top plate 224 is a heat dissipating surface, and the components to be dissipated are closely attached to the heat dissipating surface to transfer heat to the liquid chamber 262.
  • the separation baffle 24 is disposed in the accommodating space 246 , and one end thereof abuts against the bottom plate 222 , and the other end is disposed against the top plate 224 , and the accommodating space 246 is disposed. It is divided into a liquid chamber 262 on the left side and a gas chamber 264 on the right side. Specifically, the separating baffle 24 abuts against the top end of the gas pipe 8 at the top plate 224 to maximize the contact surface of the liquid body cavity 262 with the heat dissipating surface, thereby enhancing the heat dissipation effect as much as possible.
  • the bottom end of the bottom plate 222 can be set according to the actual heat dissipation requirement and the gas-liquid separation effect of the separation baffle 24, and the technical effects of the present invention can be achieved.
  • FIG. 6 a schematic structural view of a second embodiment of the heat dissipation circuit tube of the present invention is shown.
  • the liquid line 4 and the gas line 8 are alternately disposed at both ends of the evaporation portion 2'.
  • the separation baffle 24 is disposed in parallel between the bottom plate 222 and the top plate 224, and divides the accommodating space 246 into a liquid chamber 262' located above and a gas chamber 264 located below.
  • the technical effect of the present invention can also be achieved.
  • the present invention provides a backlight module, including: a back plate 20 and a backlight 4 disposed in the back plate 20 (K is disposed in the back plate 20 of the light guide plate 60 ) And a heat dissipation circuit tube disposed in the back plate 20 and located under the backlight 40.
  • the heat dissipation circuit tube includes: an evaporation portion 2, a liquid pipeline 4 connected to one end of the evaporation portion 2, and a liquid pipeline 4 connected to the evaporation a condensation pipe 6 at one end and a gas pipe 8 connected to the evaporation portion 2 at one end of the condensation pipe 6 , the evaporation portion 2 including a casing 22 and a separation baffle 24 provided in the casing 22, An accommodating space 246 is formed in the housing 22 , and the separating baffle 24 is disposed in the accommodating space 246 .
  • the accommodating space 246 is divided into a liquid chamber 262 and a gas chamber 264.
  • the liquid line 4 communicates with the liquid chamber 262, and the gas line 8 communicates with the gas chamber 264.
  • the evaporation unit 24 is made of a polymer material for separating liquid and gas, and separating the liquid and the gas in the evaporation portion 2 by the separation baffle 24, and the present invention effectively simplifies the structure of the evaporation portion 2 compared to the conventional evaporation portion.
  • the manufacturing cost of the evaporation unit 2 is reduced, and the manufacturing cost of the entire heat dissipation circuit tube is further reduced.
  • the liquid is a heat dissipating liquid, which is injected into the tube when the heat dissipation loop tube is fabricated, and the evaporation portion 2 absorbs the heat generated by the backlight 40 and transfers the heat to the heat dissipating liquid in the liquid chamber 262.
  • the heat dissipating liquid absorbs the heat and vaporizes into
  • the gas passes through the separation baffle 24 into the gas chamber 264 and is sent through the gas line 8 to the condensing line 6, where the gas condenses into a liquid and is delivered to the liquid through the liquid line 4. In the cavity 262, this cycle is performed to achieve heat dissipation.
  • the housing 22 includes a bottom plate 222 , a top plate 224 disposed opposite the bottom plate 222 , and a plurality of side plates 226 disposed between the bottom plate 222 and the top plate 224 .
  • the bottom plate 222 , the top plate 224 , and the side The plate 226 forms the accommodation space 246.
  • the upper surface of the top plate 224 is a heat dissipating surface.
  • the circuit board 42 of the backlight 40 is closely attached to the heat dissipating surface to transfer heat generated by the LED lamp 44 to the liquid cavity 262, thereby ensuring the backlight module. quality.
  • the separation baffle 24 is disposed in the accommodating space 246 , and one end thereof abuts against the bottom plate 222 , and the other end is disposed against the top plate 224 , and the accommodating space 246 is disposed. It is divided into a liquid chamber 262 on the left side and a gas chamber 264 on the right side.
  • the separating baffle 24 abuts the top plate 224 near the end of the gas line 8 to maximize the contact surface of the liquid chamber 262 with the heat dissipating surface, thereby enhancing the heat dissipation effect as much as possible;
  • the 222 end can be set according to the actual heat dissipation requirement and the gas-liquid separation effect of the separation baffle 24, and the technical effects of the present invention can be achieved.
  • FIG. 6 is a schematic diagram of another embodiment of a backlight module according to the present invention.
  • the liquid pipeline 4 and the gas pipeline 8 are alternately disposed on the evaporation portion 2,
  • the two ends of the separation baffle 24 are disposed in parallel between the bottom plate 222 and the top plate 224, and the accommodating space 246 is divided into a liquid chamber 262' located above and a gas chamber 264 located below, and the same can be realized.
  • the technical effect of the present invention is disposed in parallel between the bottom plate 222 and the top plate 224, and the accommodating space 246 is divided into a liquid chamber 262' located above and a gas chamber 264 located below, and the same can be realized.
  • the heat dissipation loop tube of the present invention and the backlight module using the heat dissipation loop tube realize gas-liquid separation by a simple structure by providing a separation baffle in the evaporation portion, and effectively cool the structure of the heat dissipation loop tube
  • the cost of the heat dissipation loop tube is reduced, the separation effect of the liquid and the gas is improved, the circulation speed of the liquid gas is accelerated, the heat dissipation effect of the heat dissipation loop tube is improved, and the heat dissipation effect of the backlight module is improved.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Mechanical Engineering (AREA)
  • Planar Illumination Modules (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Liquid Crystal (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

一种散热回路管包括：蒸发部（2）、连接于蒸发部一端的液体管路（4）、连接于液体管路远离蒸发部一端的冷凝管路（6）及一端连接冷凝管路且另一端连接蒸发部的气体管路（8），蒸发部包括壳体（22）及设于壳体内的分离挡板（24），壳体内形成有一容置空间（246），分离挡板设置于该容置空间内，将该容置空间分割成一液体腔（262）及一气体腔（264），所述液体管路与液体腔相连通，气体管路与气体腔相连通，分离挡板用于分离液体与气体。还公开了一种包括散热回路管的背光模件。

Description

热回路管及用该散热回路管的背光模组
Figure imgf000003_0001
T光模组' 背景;
液晶显示装置 ( Liquid Crystal Display, LCD )具有机身薄、 省电、 无 辐射等众多优点， 得到了广泛的应用。 现有市场上的液晶显示装置大部分 为背光型液晶显示装置， 其包括液晶显示面板及背光模组 （backlight module ) 。 液晶显示面板的工作 , 片平行的玻璃基板当中放置液 晶分子， 两片玻璃基板中间有许多垂直和水平的细小电线
来控制液晶分子改变方向， 将背光模组的光线朝 ^产生画面。 由于液 晶显示面板本身不发光， 需要借由背光模组提^ t源来正常显示影像， 因此， 背光模组成为液晶显示装置的关键组件之 背光模组依照光源入 射位置的不同 光模组与直下式背光模组两种。 直下式背光模 组是将发光光源设置在液晶显示面板后方， 直接形成面光源提供给液晶显 示面板。 而侧入式背光模组是将发光光源设于液晶显示面板侧后方的背板 边缘， 发光光源发出的光线从导光板 ( Light Guide Plate, LGP )一侧的入 光面进入导光板， 经反.射和扩散后从导光板出光面射出， 再经由光学膜片 组， 以形成面光源提供给液晶显示面板。
目前， 常见的发光光源有冷阴极萤光灯管 ( Cold Cathode Fluorescent Lam , CCFL ) 夕卜.置电极 '安光 ： (External Electrode Fluorescent Lamp, EEFL )及发光二极管 ( Light Emitting Diode, LED ) ， 其中， LED由于具 有环保、 使用寿命长等优点， 得到了广泛的应用， 而用于 LED散热的散 热装置是防止背光模组性能恶化、 延长背光模组寿命的的重要部分。
现有技术中， 通常采用在安装有数个 LED 灯的印劇电路板（Printed Circuit Board, PCB ) 下方设置- 热回路管， 实现 LED灯的散热。
请参阅图 1， 为现有的一种 LED散热回路管的结构示意图， 其包括一 液体管 100、 一蒸发部 300、 一气体管 500以及一冷凝管 700， 散热回路管 内注有易吸热挥发的散热液体（包括水、 氟利昂制冷剂、 氨、 甲醇等） ， 该散热液体经液体管 100流入蒸发部 300后吸收热量挥发成气体， 进入气 体管 500， 再经冷凝管 700冷凝成液体后又再次进入液体管 100， 如此可 反复使用， 提升散热效果。
进一步地， 请参阅图 3 , 所述蒸发部 300 包括蒸发表面 302 , 毛细结 构 304、 气体通道 306、 截止板 307、 补偿室 308、 及液相室 309。 散热回 路管是由铜、 钛等金属制成的合金管， 在真空中向该合金管注入适量的工 作液体 （包括水、 氟利昂制冷剂、 氨、 曱醇等） ， 该工作液体能吸热蒸发 成气体。
请参阅图 2及 3 , LED模块一般包括 LED单元 902及 PCB板 904， 为实现散热， 将 PCB板 904设置在蒸发部 300的蒸发表面 302上， 工作液 体从液体管 100 输入至蒸发部 300， 依次通过液相室 309 及毛细结构 304 , 吸收外部热源的热量并转化成气体， 被蒸发成气体的工作液体通过 气体通道 306流入气体管 500， 再经过冷凝管 700冷凝成液体继续在散热 回路管中循环使用。
由散热回路管的散热原理可知， 在蒸发部 300 内既有液体也有气体， 然而从图 3 中可以看出， 该散热回路管中的蒸发部 300主要通过毛细结构 304 和截止板 307 来分离液体和气体， 该结构中气体的流通通道非常窄 小， 气体和液体的分离效果并不十分好， 而气体和液体的分离效果直接影 响着气体和液体的流通速度， 进而影响着散热回路管的散热效果。 发明内容
本发明的目的在于提供一种散热回路管， 其结构简单， 成本低， 散热 效果.好'。
本发明的另一目的在于提供一种背光模组， 其在背光源与背板之间设 置散热回路管， 有效提高散热效果， 保证了背光模组的品质。
为实现上述目的， 本发明提供一种散热回路管， 包括： 蒸发.部， 连接 于蒸发部一端的液体管路、 连接于液体管路远离蒸发部一端的冷凝管路及 一端连接冷凝管路且另一端连接蒸发部的气体管路， 所述蒸发部包括壳体 及设于壳体内的分离挡板， 所述壳体内形成有一容置空间， 所述分离挡板 设置于该容置空间内， 将该容置空间分割成一液体腔及一气体腔， 所述液 体管路与液体腔相连通， 所述气体管路与气体腔相连通， 所述分离挡板用 于分离液体与气体。
所述壳体包括底板、 与底板相对设置的顶板及设于底板与顶板之间的 数个侧板， 该底板.。 顶板及侧板形成所述容置空间。
所述分离挡板一端抵靠于底板， 另一端抵靠于顶板设置， 且所述分离 挡板抵靠于顶板靠近气体管路一端， 将所述容置空间分割成位于左侧的液 体腔.及位于右侧的气体月空。
所述分离挡板平行设于底板与顶板之间， 将所述容置空间分割成位于 上方的液体腔及位于下方的气体腔。
所述分离挡板由高分子聚合材料制成。
本发明还提供一种散热回路管， 包括： 蒸发部、 连接于蒸发部一端的 液体管路、 连接于液体管路远离蒸发部一端的冷凝管路及一端连接冷凝管 路且另一端连接蒸发部的气体管路， 所述蒸发部包括壳体及设于壳体内的 分离挡板， 所述壳体内形成有一容置空间， 所述分离挡板设置于该容置空 间内， 将该容置空间分割成一液体腔及一气体腔， 所述液体管路与液体腔 相连通， 所述气体管路与气体腔相连通， 所述分离挡板用于分离液体与气 体；
其中， 所述壳体包括底板、 与底板相对设置的顶板及设于底板与顶板 之间的数个侧板， 该底板、 顶板及側板形成所述容置空间。
所述分离挡板一端抵靠于底板， 另一端抵靠于顶板设置， 且所述分离 挡板抵靠于顶板靠近气体管路一端， 将所述容置空间分割成位于左侧的液 体腔及位于右側的气体腔。
所述分离挡板平行设于底板与顶板之间， 将所述容置空间分割成位于 上方的液体腔及位于下方的气体腔。
所述分离挡板由高分子聚合材料制成。
本发明还提供一种背光模组， 包括： 背板、 设于背板内的背光源。 设 于背板内的导光板及设于背板内且位于背光源下方的散热回路管， 所述散 热回路管包括： 蒸发部、 连接于蒸发部一端的液体管路、 连接于液体管路 远离蒸发部一端的冷凝管路及一端连接冷凝管路且另一端连接蒸发部的气 体管路， 所述蒸发部包括壳体及设于壳体内的分离挡板， 所述壳体内形成 有一容置空间， 所述分离挡板设置于该容置空间内， 将该容置空间分割成 一液体腔及一气体腔， 所述液体管路与液体腔相连通， 所述气体管路与气 体腔相连通， 所述分离挡板用于分离液体与气体。
所述壳体包括底板、 与底板相对设置的顶板及设于底板与顶板之间的 数个側板， 该底板、 顶板及侧板形成所述容置空间， 所述背光源设于所述 顶板上。
所述分离挡板一端抵靠于底板， 另一端抵靠于顶板设置， 且所述分离 挡板抵靠于顶板靠近气体管路一端， 将所述容置空间分割成位于左侧的液 体腔及位于右側的气体腔。
所述分离挡板平行设于底板与顶板之间， 将所述容置空间分割成位于 上方的液体腔及位于下方的气体腔。
所述分离挡板由高分子聚.合材料制成。
本发明的有益效果： 本发明的散热回路管及用该散热回路管的背光模 组， 通过在蒸发部内设置分离挡板， 以简单的结构实现气液分离， 有效的 简化了散热回路管的结构， 降低了散热回路管的成本， 且提高了液体和气 体的分离效果， 加快了液体气体的流通速度， 提高了散热回路管的散热效 果， 进而提高了背光模组的散热效果。
为了能更进一步了解本发明的特征以及技术内容， 请参阅以下有关本 发明的详细说明与附图， 然而附图仅提供参考与说明用， 并非用来对本发 明加以限制。 附图说明
下面结合附图， 通过对本发明的具体实施方式详细描述， 将使本发明 的技术方案及其它有益效果显而易见。
附图中，
图 为现有的一种散热回路管的结构示意图；
图 2为散热回路管组装于背板的结构示意图；
图 3为图 i中蒸发部的剖面结构示意图；
图 4为本发明散热回路管的第一实施例的结构示意图；
图 5为图 4中蒸发部的剖面结构示意图；
图 6为本发明散热回路管的第二实施例的结构示意图；
图 7为图 6中蒸发部的剖面结构示意图；
图 8为本发明背光模组的结构示意图；
图 9为本发明背光模组另一实施例的结构示意图。 具体实族方式
为更进一步阐述本发明所采取的技术手段及其效果， 以下结合本发明 的优选实施例及其附图进行、详细描述。
请参阅图 4及图 5 , 本发明提供一种散热回路管， 包括： 蒸发部 2、 连接于蒸发部 2 —端的液体管路 4 , 连接于液体管路 4远离蒸发部 2一端 的冷凝管路 6及一端连接冷凝管路 6且另一端连接蒸发部 2 的气体管路 8， 所述蒸发部 2 包括壳体 22及设于壳体 22 内的分离挡板 24 , 所述壳体 22 内形成有一容置空间 246， 所述分离挡板 24 设置于该容置空间 246 内， 将该容置空间 246分割成一液体腔 262及一气体腔 264 , 所述液体管 路 4与液体腔 262相连通， 所述气体管路 8与气体腔 264相连通， 所述分 离挡板 24 由高分子聚合材料制成， 用于分离液体与气体， 通过该分离挡 板 24分离蒸发部 2 内的液体与气体， 相比现有的蒸发部， 本发明有效简 化蒸发部 2的结构， 降低蒸发部 2的制作成本， 进,¾降低整个散热回路管 的制作成本。
所述液体为散热液体， 其在散热回路管制作时注入管内， 蒸发部 2吸 收热量， 并将该热量传递至液体腔 262 内的散热液体， 散热液体吸收该热 量后气化成气体， 该气体穿过所述分离挡板 24进入气体腔 264， 并通过气 体管路 8输送至冷凝管路 6, 气体在冷凝管路 6 内冷凝成液体， 并通过液 体管路 4输送至液体腔 262内， 如此循环， 以实现散热。
具体地， 请参阅图 5， 所述壳体 22包括底板 222、 与底板 222相对设 置的顶板 224及设于底板 222 与顶板 224之间的数个侧板 226, 该底板 222、 頂板 224及侧板 226形成所述容置空间 246。 所述顶板 224的上表面 为散热表面， 需散热的元件紧密贴合与该散热表面上， 以将热量传递至液 体腔 262。
请参阅图 5 , 在本实施例中， 所述分离挡板 24 倾斜设置于容置空间 246 内， 其一端抵靠于底板 222， 另一端抵靠于顶板 224设置， 将所述容 置空间 246分割成位于左侧的液体腔 262及位于右侧的气体腔 264。 具体 地， 所述分离挡板 24抵靠于顶板 224靠近气体管路 8—端， 以使得所述 液.体腔 262与散热表面的接触面最大化， 尽可能的增强散热效果， 其抵靠 于底板 222 端， 可根据实际散热需求及分离挡板 24 的气液分离效果进行 设置， 均可实现本发明的技术效果。
请参阅图 6, 为本发明散热回路管的第二实施例的结构示意图， 在本 实施例中， 所述液体管路 4与气体管路 8交错设置于蒸发部 2'的两端。 进 一步地， 请参阅图 7， 所述分离挡板 24，平行设于底板 222与顶板 224之 间， 将所述容置空间 246分割成位于上方的液体腔 262'及位于下方的气体 腔 264，， 同样可以实现本发明的技术效果。
请参阅图 8, 并参考图 4及图 5 , 本发明提供一种背光模组， 包括： 背板 20、 设于背板 20内的背光源 4(K 设于背板 20内的导光板 60及设于 背板 20内且位于背光源 40下方的散热回路管， 所述.散热回路管包括： 蒸 发部 2、 连接于蒸发部 2一端的液体管路 4、 连接于液体管路 4远离蒸发 部 2端的冷凝管路 6及一端连接冷凝管路 6另一端连接蒸发部 2的气体管 路 8， 所述蒸发部 2包括壳体 22及设于壳体 22内的分离挡板 24， 所述壳 体 22 内形成有一容置空间 246， 所述分离挡板 24设置于该容置空间 246 内， 将该容置空间 246分割成一液体腔 262及一气体腔 264， 所述液体管 路 4与液体腔 262相连通， 所述气体管路 8与气体腔 264相连通， 所述分 离挡板 24 由高分子聚合材料制成， 用于分离液体与气体， 通过该分离挡 板 24 分离蒸发部 2 内的液体与气体， 相比现有的蒸发部， 本发明有效简 化蒸发部 2的结构， 降低蒸发部 2的制作成本， 进而降低整个散热回路管 的制作成本。
所述液体为散热液体， 其在散热回路管制作时注入管内， 蒸发部 2吸 收背光源 40 发出的热量， 并将该热量传递至液体腔 262 内的散热液体， 散热液体吸收该热量后气化成气体， 该气体穿过所述分离挡板 24 进入气 体腔 264， 并通过气体管路 8输送至冷凝管路 6， 气体在冷凝管路 6 内冷 凝成液体， 并通过液体管路 4输送至液体腔 262内， 如此循环， 以实现散 热。
具体地， 请参阅图 5 , 所述壳体 22包括底板 222、 与底板 222相对设 置的顶板 224及设于底板 222 与顶板 224之间的数个侧板 226, 该底板 222、 顶板 224及侧板 226形成所述容置空间 246。 所述顶板 224的上表面 为散热.表面， 所述背光源 40的电路板 42紧密贴合与该散热表面上， 以将 LED灯 44发出的热量传递至液体腔 262 , 进而保证背光模组的品质。
请参阅图 5 , 在本实施例中， 所述分离挡板 24 倾斜设置于容置空间 246 内， 其一端抵靠于底板 222, 另一端抵靠于顶板 224设置， 将所述容 置空间 246分割成位于左侧的液体腔 262及,位于右侧的气体腔 264。 具体 地， 所述分离挡板 24抵靠于顶板 224靠近气体管路 8端， 以使^ 所述液 体腔 262 与散热表面的接触面最大化， 尽可能的增强散热效果； 其抵靠于 底板 222 端， 可根据实际散热需求及分离挡板 24 的气液分离效果进行设 置， 均可实现本发明的技术效果
请参阅图 9， 并参考图 6及图 7 , 为本发明背光模组另一实施例的示 意图， 在本实施例中， 所述液体管路 4与气体管路 8交错设置于蒸发部 2， 的两端， 所述分离挡板 24，平行设于底板 222与顶板 224之间， 将所述容 置空间 246分割成位于上方的液体腔 262'及位于下方的气体腔 264，， 同样 可以实现本发明的技术效果。
综上所述， 本发明的散热回路管及用该散热回路管的背光模组， 通过 在蒸发部内设置分离挡板， 以简单的结构实现气液分离， 有效的筒化了散 热回路管的结构， 降低了散热回路管的成本， 且提高了液体和气体的分离 效果， 加快了液体气体的流通速度， 提高了散热回路管的散热效果， 进而 提高了背光模组的散热效果。 以上所述， 对于本领域的普通技术人员来说， 可以根据本发明的技术 方案和技术构思作出其他各种相应的改变和变形， 而所有这些改变和变形

Claims

1 一种散热回路管， 包括： 蒸发部、 连接于蒸发部一端的液体管 路、 连接于液体管路远离蒸发部一端的冷凝管路及一端连接冷凝管路且另 一端连接蒸发部的气体管路， 所述蒸发部包括壳体及设于壳体内的分离挡 板， 所述壳体内形成有一容置空间， 所述分离挡板设置于该容置空间内， 将该容置空间分割成一液体腔及一气体腔， 所述液体管路与液体腔相连 通， 所述气体管路与气体腔相连通， 所述分离挡板用于分离液体与气体。
2、 如权利要求 1 所述的散热回路管， 其中， 所述壳体包括底板、 与 底板相对设置的顶板及设于底板与顶板之间的数个侧板， 该底板、 顶板及 侧板形成所述容置空间。
3、 如权利要求 2 所述的散热回路管， 其中， 所述分离挡板一端抵靠 于底板， 另一端抵靠于顶板设置， 且所述分离挡板^ ^靠于顶板靠近气体管 路一端， 将所述容置空间分割成位于左侧的渙体腔及位于右侧的气体腔。
4、 如权利要求 2 所述的散热回路管， 其中， 所述分离挡板平行设于 底板与顶板之间， 将所述容置空间分割成位于上方的液体腔及位于下方的 气体腔。
5、 如权利要求 1 所述的散热回路管， 其中， 所述分离挡板由高分子 聚合材料制成。
6、 一种散热回路管， 包括： 蒸发部、 连接于蒸发部一端的液体管 路、 连接于液体管路远离蒸发部一端的冷凝管路及一端连接冷凝管路且另 一端连接蒸发部的气体管路， 所述蒸发部包括壳体及设于壳体内的分离挡 板， 所述壳体内形成有一容置空间， 所述分离挡板设置于该容置空间内， 将该容置空间分割成一液体腔及一气体腔， 所述液体管路与液体腔相连 通， 所述气体管路与气体腔相连通， 所述分离挡板用于分离液体与气体； 其中， 所述壳体包括底板、 与底板相对设置的顶板及设于底板与顶板 之间的数个侧板， 该底板、 顶板及側板形成所述容置空间。
7、 如权利要求 6 所述的散热回路管， 其中， 所述分离挡板一端抵靠 于底板， 另一端抵靠于顶板设置， 且所述分离挡板抵靠于顶板靠近气体管 路一端， 将所述容置空间分割成位于左侧的液体腔及位于右侧的气体腔。
8、 如权利要求 6 所述的散热回路管， 其中， 所述分离挡板平行设于 底板与顶板之间， 将所述容置空间分割成位于上方的液体腔及位于下方的 气体腔。
9、 如权利要求 6 所述的散热回路管， 其中， 所述分离挡板由高分子 聚合材料制成。
10、 一种背光模组， 包括： 背板， 设于背板内的背光源、 设于背板内 的导光板及设于背板内且位于背光源下方的散热回路管， 所述散热回路管 包括： 蒸发部、 连接于蒸发部一端的液体管路、 连接于液体管路远离蒸发 部一端的冷凝管路及一端连接冷凝管路且另一端连接蒸发部的气体管路， 所述蒸发部包括壳体及设于壳体内的分离挡板， 所述壳体内形成有一容置 空间， 所述分离挡板设置于该容置空间内， 将该容置空间分割成一液体腔 及一气体腔， 所述液体管路与液体腔相连通， 所述气体管路与气体腔相连 通， 所述分离挡板用于分离液体与气体。
11、 如权利要求 10 所述的背光模组， 其中， 所述壳体包括底板、 与 底板相对设置的顶板及设于底板与顶板之间的数个侧板， 该底板、 顶板及 侧板形成所述容置空间， 所述背光源设于所述顶板上。
12、 如权利要求 11 所述的背光模组， 其中， 所述分离挡板一端抵靠 于底板， 另一端抵靠于顶板设置， 且所述分离挡板抵靠于顶板靠近气体管 路一端， 将所述容置空间分割成位于左侧的液体腔及位于右侧的气体腔。
】3、 如权利要求 11 所述的背光模组， 其中， 所述分离挡板平行设于 底板与顶板之间， 将所述容置空间分割成位于上方的液体腔及位于下方的 气体腔。
14, 如权利要求 10 所述的背光模组， 其中， 所述分离挡板由高分子
PCT/CN2014/070117 2013-12-16 2014-01-03 散热回路管及用该散热回路管的背光模组 Ceased WO2015089915A1 (zh)

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