KR100290461B1 - Heat pipe having a wick structure - Google Patents

Heat pipe having a wick structure Download PDF

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Publication number
KR100290461B1
KR100290461B1 KR1019980018784A KR19980018784A KR100290461B1 KR 100290461 B1 KR100290461 B1 KR 100290461B1 KR 1019980018784 A KR1019980018784 A KR 1019980018784A KR 19980018784 A KR19980018784 A KR 19980018784A KR 100290461 B1 KR100290461 B1 KR 100290461B1
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KR
South Korea
Prior art keywords
wick
pipe
heat pipe
braiding
wires
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KR1019980018784A
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Korean (ko)
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KR19990086012A (en
Inventor
한재섭
이영수
김광수
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정선종
한국전자통신연구원
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Priority to KR1019980018784A priority Critical patent/KR100290461B1/en
Priority to JP10295435A priority patent/JP3140425B2/en
Publication of KR19990086012A publication Critical patent/KR19990086012A/en
Application granted granted Critical
Publication of KR100290461B1 publication Critical patent/KR100290461B1/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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Abstract

PURPOSE: A heat pipe having braiding wick structure is provided to improve performance by increasing capillarity with simple structure, and to simplify the manufacturing process by forming wick with braiding wire spirally in the heat pipe. CONSTITUTION: A cylindrical pipe(100) is formed, and a wick(110) is manufactured with braiding plural flexible wires(115) spirally. Plural wires are contacted to the inner wall of the pipe evenly, and an opening part is formed in the middle of the pipe to pass steam. The wire is made of 4-10 fine copper wires, and the cylindrical wick is formed with braiding 16-24 wires. The spiral braiding wick is put in the pipe. The length of the wick is longer than the length of the pipe, and the full diameter of the wick is smaller than the bore of the pipe. The length of the wick is reduced, and the full diameter of the wick is enlarged with compressing the wick inserted to the pipe longitudinally. Wires of the wick are contacted to the inner wall of the pipe evenly. Performance of the heat pipe is improved with circulating fluid in the pipe actively, and manufacturing process is simplified.

Description

편조형 윅 구조를 갖는 히트파이프{Heat pipe having a wick structure}Heat pipe having a wick structure

본 발명은 히트파이프에 관한 것으로서, 특히 히트파이프내의 작동유체의 순환효율을 증대시켜 히트파이프의 성능을 향상시킬 수 있는 편조형 윅 구조를 갖는 히트파이프에 관한 것이다.The present invention relates to a heat pipe, and more particularly to a heat pipe having a braided wick structure that can improve the performance of the heat pipe by increasing the circulation efficiency of the working fluid in the heat pipe.

히트파이프는 작동유체의 증발 잠열을 이용하여 작은 온도차에서도 무동력으로 열을 효과적으로 이송하는 장치이다. 도 1은 이러한 히트파이프의 작동 원리를 보인다. 도시된 바와 같이, 히트파이프는 진공상태의 파이프(10) 속에 작동유체를 넣고 밀봉한 것으로, 열원이 있는 증발부(20)에서 작동유체는 증발하여 증기가 파이프(10) 내부에 확산되면서, 이송부(30)를 지나 응축부(40)에서 열을 방출하고, 다시 액체로 되어 파이프(10) 벽면을 타고 증발부(20)로 귀환하면서, 다시 열을 받아 증발하는 작동을 반복하므로서 열을 이송하는 것이다. 이와 같은 히트파이프에 있어서, 그 성능은 작동유체의 종류, 주입량 및 파이프 내부의 진공상태, 청결도 등 여러 가지 변수의 영향을 받을 수 있으나, 응축부(40)에서 응축된 액체가 다시 증발부(20)로 잘 귀환할 수 있도록 하는 것이 특히 중요하다. 일반적으로 히트파이프는 파이프 내부에 작동유체의 순환을 위하여 윅을 인입하거나 내벽에 홈을 가공하여 모세관력을 생기도록 하고, 내부를 진공상태로 만든 후 적당량의 작동유체를 넣고 파이브의 양단을 밀봉하므로서 모세관력을 이용하여 작동유체를 순환시킨다. 즉, 응축부(40)에서 응축된 액체의 증발부(20)로의 귀환은 주로 모세관력에 의존하고 있으며, 이 모세관력을 주기 위하여 파이프 내벽에 윅(Wick)을 인입하거나 그루브(Groove)를 만들어 주고 있다. 도 2는 파이프(10) 내에 윅으로 사용되는 스크린 메쉬(Screen Mesh)(55)를 말아서 인입하는 경우를 도시하고 있고, 도 3은 파이프(10) 내벽 원주상에 윅으로 사용되는 가는 선재(65)를 주입한 후 스프링(68)을 이용하여 파이프 내벽에 밀착시키는 것을 나타낸다. 또한 도 4는 파이프(10) 내벽에 그루브(75)를 형성하여 모세관력을 주는 것을 도시하고, 이외에도 내부 벽면을 다공질로 소결하여 만드는 방법도 있다.Heat pipe is a device that transfers heat efficiently without any force even at small temperature difference by using latent heat of evaporation of working fluid. 1 shows the principle of operation of this heat pipe. As shown, the heat pipe is sealed by putting the working fluid in the vacuum pipe 10, the working fluid is evaporated in the evaporator 20 having a heat source vapor is diffused into the pipe 10, the transfer part After passing through the 30, the heat is discharged from the condensation unit 40, and the liquid is returned to the evaporation unit 20 on the wall of the pipe 10, and the heat is transferred again by repeating the operation of receiving the heat again. will be. In such a heat pipe, the performance may be affected by various variables such as the type of working fluid, the injection amount, the vacuum state inside the pipe, and the cleanliness, but the liquid condensed in the condenser 40 may again be evaporated. It is especially important to be able to return well to). In general, heat pipes introduce a wick into the pipe to circulate the working fluid or process a groove in the inner wall to generate capillary force, and after making the inside vacuum, insert a suitable amount of working fluid and seal both ends of the pipe. Circulate the working fluid using capillary force. That is, the return of the condensed liquid from the condenser 40 to the evaporator 20 is mainly dependent on the capillary force, and in order to give the capillary force, a wick is introduced into the inner wall of the pipe or a groove is made. Giving. FIG. 2 illustrates a case in which a screen mesh 55 used as a wick is rolled and drawn in the pipe 10, and FIG. 3 shows a thin wire 65 used as a wick on the inner wall circumference of the pipe 10. ) Is injected into the inner wall of the pipe using the spring (68). In addition, FIG. 4 illustrates the formation of the grooves 75 on the inner wall of the pipe 10 to give capillary force. In addition, a method of making the inner wall surface by sintering porously may be used.

본 발명은 히트파이프에 있어서, 그 작동유체의 응축부에서 증발부로의 귀환시 모세관력을 증대시키는 윅의 구조 및 상기 윅을 히트파이프로 인입하는 방법을 제공한다. 본 발명에 의하면 모세관력을 증대시킬 수 있고 상기 윅의 인입을 간단화 시킬 수 있다. 이에 따라 히트파이프의 성능을 향상시킬 수 있고 제조공정을 간소화시킬 수 있게 된다. 따라서, 본 발명의 목적은 작동유체의 모세관력을 증대시킬 수 있어 그 성능이 향상 되는 윅 구조를 갖는 히트파이프를 제공하는 것이다.The present invention provides a heat pipe, in which a structure of a wick increases capillary force upon return from the condensation part of the working fluid to the evaporation part and a method of introducing the wick into the heat pipe. According to the present invention it is possible to increase the capillary force and simplify the introduction of the wick. This can improve the performance of the heat pipe and simplify the manufacturing process. Accordingly, it is an object of the present invention to provide a heat pipe having a wick structure that can increase the capillary force of the working fluid and improve its performance.

이러한 본 발명의 목적은 응축된 작동 유체를 증발부로 귀환 시킴에 있어서 모세관력을 주기 위하여 윅을 사용하는 히트파이프에 있어서, 상기 윅은 다수의 선재를 상기 히트파이프 내벽을 따라 나선 방향으로 편조되어 형성됨을 특징으로 하는 히트파이프를 제공함으로서 달성된다. 또한 상기 윅의 히트파이프 내의 장착은 히트파이프의 내벽에 대응하여 원통형을 구성하도록 나선 방향으로 편조된 윅을 형성하고, 이때 상기 윅의 외경은 히트파이프의 내경보다 작게하며 또한 그 길이는 히트파이프의 길이보다는 길게 형성 하고, 상기 윅을 상기 파이프로 인입한후 상기 윅을 그 길이방향에서 압축함에 따라 편조윅의 파이프 내벽에 밀착되므로서 외경이 반경방향으로 팽창하여 달성된다.An object of the present invention is a heat pipe using a wick to give capillary force in returning the condensed working fluid to the evaporator, the wick is formed by braiding a plurality of wire rods in a spiral direction along the inner wall of the heat pipe It is achieved by providing a heat pipe characterized by. In addition, the mounting in the heat pipe of the wick forms a wick braided in a spiral direction to form a cylindrical shape corresponding to the inner wall of the heat pipe, wherein the outer diameter of the wick is smaller than the inner diameter of the heat pipe and the length of the heat pipe is It is formed longer than the length, and after the wick is drawn into the pipe and the wick is compressed in its longitudinal direction, the outer diameter expands in a radial direction by being in close contact with the pipe inner wall of the braided wick.

도 1은 일반적인 히트파이프의 작동 원리를 설명하기 위한 단면도.1 is a cross-sectional view for explaining the principle of operation of a general heat pipe.

도 2(a) 및 도 2(b)는 종래 히트파이프의 한 예를 나타낸 사시도 및 단면도.2 (a) and 2 (b) are a perspective view and a cross-sectional view showing an example of a conventional heat pipe.

도 3(a) 및 도 3(b)는 종래 히트파이프의 다른 예를 나타낸 사시도 및 단면도.3 (a) and 3 (b) are a perspective view and a cross-sectional view showing another example of a conventional heat pipe.

도 4(a) 및 도 4(b)는 종래 히트파이프의 또다른 예를 나타낸 사시도 및 단면도.4 (a) and 4 (b) are a perspective view and a cross-sectional view showing another example of a conventional heat pipe.

도 5(a) 및 도 5(b)는 본 발명에 따른 편조형 윅 구조를 갖는 히트파이프를 설명하기 위한 사시도 및 단면도.5 (a) and 5 (b) are a perspective view and a cross-sectional view for explaining a heat pipe having a braided wick structure according to the present invention.

도 6(a) 및 도 6(b)는 본 발명에 따른 히트파이프의 윅 인입 방법을 설명하기 위한 단면도.6 (a) and 6 (b) are cross-sectional views for explaining a wick drawing method of a heat pipe according to the present invention.

〈도면의 주요 부분에 대한 부호 설명〉<Description of Signs of Major Parts of Drawings>

10 및 100 : 파이프 20 : 증발부10 and 100: pipe 20: evaporator

30 : 이송부 40 : 응축부30: transfer part 40: condensation part

55 : 스크린 메쉬 65 및 115 : 선재55 screen mesh 65 and 115 wire rod

68 : 스프링 75 : 그루브68: spring 75: groove

110 : 윅110: Wick

이하, 첨부된 도면을 참조하여 본 발명을 설명한다.Hereinafter, with reference to the accompanying drawings will be described the present invention.

도 5(a) 및 도 5(b)는 본 발명에 따른 윅 구조를 갖는 히트파이프를 설명하기 위한 사시도 및 단면도로서, 도 5(a)는 파이프(100) 내부에 다수의 가는 선재(115)가 원통형의 나선 방향으로 편조되어 형성된 윅(110)이 인입되는 형상을 도시하고 있고, 도 5(b)는 파이프(100) 내부에 윅(110)이 인입된 상태를 절단한 단면을 도시하고 있다.5 (a) and 5 (b) are a perspective view and a cross-sectional view for explaining a heat pipe having a wick structure according to the present invention, Figure 5 (a) is a plurality of thin wires 115 inside the pipe 100 Shows a shape in which the wick 110 formed by being braided in the spiral direction of the cylinder is drawn in, and FIG. 5 (b) shows a cross section in which the wick 110 is inserted into the pipe 100. .

도 5에 도시된 바와 같이, 파이프(100)는 원통형으로 구성되어 있으며, 윅(110)은 모세관력 및 신축성이 탁월한 재질로 구성된 다수의 선재(115)가 나선 방향으로 편조되어 형성되고, 파이프(100) 내벽에 다수의 선재(115)가 골고루 밀착되며 파이프(100)의 중앙부에 증기통로로 이용되는 개구가 형성되도록 이루어져 있다. 상기에서 윅(110)은 4 내지 10개의 가는 순수 구리선을 다발로 하는 선재(115)를 16 내지 24 개씩 편조하여 원통형으로 형성하는 것이 가장 적절하다.As shown in FIG. 5, the pipe 100 is formed in a cylindrical shape, and the wick 110 is formed by braiding a plurality of wires 115 made of a material having excellent capillary force and elasticity in a spiral direction, and the pipe ( 100) A plurality of wire rods 115 are uniformly in close contact with the inner wall, and the openings used as the steam passages are formed in the center of the pipe 100. The wick 110 is most suitable to form a cylindrical shape by braiding 16 to 24 wire rods 115 each having 4 to 10 fine pure copper wires.

도 6(a) 및 도 6(b)는 본 발명에 따른 히트파이프 내의 윅 인입 방법을 설명하기 위한 단면도이다.6 (a) and 6 (b) are cross-sectional views for explaining a wick drawing method in a heat pipe according to the present invention.

도 6(a)를 참조하면, 파이프(100) 내에 다수의 가는 선재(115)가 나선 방향으로 편조되어 형성된 윅(110)을 파이프(100) 내부에 인입한다. 이때, 인입시의 윅(110)의 길이는 파이프(100) 길이보다 길고, 윅(110)의 외경은 파이프(100) 내경보다 작은 상태로 한다.Referring to FIG. 6A, a wick 110 formed by braiding a plurality of thin wires 115 in a spiral direction in the pipe 100 is introduced into the pipe 100. At this time, the length of the wick 110 at the time of pulling in is longer than the length of the pipe 100, the outer diameter of the wick 110 is smaller than the inner diameter of the pipe 100.

도 6(b)를 참조하면, 파이프(100)에 인입된 윅(110)을 길이 방향으로 압축을 하면, 편조된 윅(110)의 길이는 줄어들면서 윅(110)의 외경은 확대되어 파이프(100) 내부 벽에 윅의 각 선재(115)들이 균일하게 밀착되게 된다.Referring to FIG. 6 (b), when the wick 110 inserted into the pipe 100 is compressed in the lengthwise direction, the outer diameter of the wick 110 is enlarged while the length of the braided wick 110 is reduced, thereby expanding the pipe ( 100) Each wire 115 of the wick is in close contact with the inner wall.

이와 같이, 본 발명은 파이프 내에 다수의 가는 선재가 원통형의 나선 방향으로 편조되어 형성된 윅을 인입하고, 편조된 윅의 외경이 파이프 내경보다 작은 상태에서 파이프 내부에 인입한 후 파이프 길이의 방향으로 편조된 윅을 압축하므로서, 윅의 길이가 줄고 외경이 확대되면서 파이프 내벽에 선재가 잘 밀착되도록 한다. 이에 따라, 파이프의 원주상에 균일하게 개개의 선재가 분포하게 되고, 파이프 중앙으로는 충분한 증기통로가 확보되며, 파이프 내벽에는 작동유체 순환을 위한 충분한 모세관력을 확보되므로서, 히트파이프의 성능을 향상시킬 수 있고 제조공정을 간소화시킬 수 있다.As described above, the present invention introduces a wick formed by braiding a plurality of thin wires in a spiral direction in a cylindrical spiral shape, and braiding in the direction of a pipe length after introducing the inside of the pipe while the outer diameter of the braided wick is smaller than the pipe inner diameter. By compressing the wick, the length of the wick is reduced and the outer diameter is enlarged so that the wire rod adheres well to the pipe inner wall. Accordingly, the individual wire rods are uniformly distributed on the circumference of the pipe, a sufficient steam passage is secured to the center of the pipe, and a sufficient capillary force for the working fluid circulation is secured to the inner wall of the pipe, thereby improving the performance of the heat pipe. Can improve and simplify the manufacturing process.

Claims (1)

응축된 작동 유체는 증발부로 귀환시키기 위한 모세관력을 얻기 위하여 내부에 윅이 삽입되는 히트파이프에 있어서,In a heat pipe in which a wick is inserted therein to obtain a capillary force for returning the condensed working fluid to the evaporator, 상기 윅은 다수의 선재가 나선 형태로 편조되어 상기 히트파이프 내벽에 대응하되, 그 외경이 상기 히트파이프의 내경보다 작고, 그 길이는 상기 히트파이프의 길이 보다 길게 구성된 상기 윅을 상기 히트파이프로 인입시킨 후 길이 방향으로 압축함으로써 상기 윅의 외주면이 상기 히트파이프의 내면과 균일하게 밀착되는 것을 특징으로 하는 히트파이프The wick has a plurality of wires braided in a spiral shape to correspond to the inner wall of the heat pipe, the outer diameter of which is smaller than that of the heat pipe, and the length of the wick is longer than the length of the heat pipe. Heat pipe, characterized in that the outer peripheral surface of the wick is uniformly in contact with the inner surface of the heat pipe by compressing in the longitudinal direction
KR1019980018784A 1998-05-25 1998-05-25 Heat pipe having a wick structure KR100290461B1 (en)

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JP10295435A JP3140425B2 (en) 1998-05-25 1998-10-16 Heat pipe manufacturing method

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