CN1884954A

CN1884954A - Heat pipe

Info

Publication number: CN1884954A
Application number: CN 200510035532
Authority: CN
Inventors: 张仁淙
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2005-06-24
Filing date: 2005-06-24
Publication date: 2006-12-27

Abstract

The invention relates to a heat tube, which comprises a hollow tube and the working liquid sealed in the tube, wherein said tube comprises one vaporizing section, and one condensing section with S-shaped structure; the vaporizing section is in screw structure; the vaporizing section can increase the contact area; and the condensing section can increase the stroke of working liquid through the condensing section. The invention can improve the heat radiation efficiency.

Description

Heat pipe

[technical field]

The present invention is about a kind of heat pipe, especially a kind of heat pipe of high efficiency heat radiation.

[background technology]

Heat pipe is the heat-conduction component that dependence self internal work fluid phase transformation realizes heat transfer, and it has characteristics such as high-termal conductivity, good isothermal, and heat-transfer effect is good, is widely used.

Electronic technology develops rapidly in recent years, the high frequency of electronic component, high speed and integrated circuit intensive and microminiaturized, make unit volume electronic component caloric value increase severely, characteristics such as hot pipe technique is efficient with it, compactness and flexibility and reliability are fit to solve the heat dissipation problem that present electronic component is derived because of performance boost.

Traditional radiating mode is that the heat abstractor made from metal material is set above heat-generating electronic elements; this heat abstractor has pedestal; the pedestal lower surface contacts with electronic component; its upper surface then is provided with some fins; pedestal absorbs the heat that electronic component produces, and by fin heat is distributed in the surrounding air, for strengthening the rate of heat exchange of fin and surrounding air; usually also above fin, add and put a fan, to strengthen gaseous exchange.Though above-mentioned heat abstractor can be used for distributing the heat that electronic component produces, but, because the coefficient of heat conduction of metal is limited, rely on the heat abstractor conduction heat of metal material merely, cause the amount of thermal conduction of heat abstractor under unit interval, unit volume also limited.The radiating mode of traditional simple metal heat abstractor can not satisfy the radiating requirements of golf calorific value electronic component.

For this reason, temperature remained unchanged when industry technology personage utilized liquid to change between gas, liquid binary states, absorbed simultaneously or the operation principle of emitting big calorimetric has been invented heat pipe.As shown in Figure 1 and Figure 2, a kind of heat pipe 10 of prior art is made up of shell 11, capillary structure 12 and the working fluids 13 that are sealed in the shell 11.The making of heat pipe 10 is filled with suitable working fluid 13 after usually earlier heat pipe 10 being evacuated, and makes to be sealed after being full of working fluid 13 in the capillary structure 12 of being close to shell 11.Heat pipe 11 1 ends are that evaporator section 10a, the other end are condensation segment 10b, can between evaporator section 10a and condensation segment 10b the adiabatic section be set as required.When the evaporator section 10a of heat pipe 10 is heated, working fluid 13 carburation by evaporations in the capillary structure 12 form steam 14, steam 14 flows to condensation segment 10b by guide hole 16 under slight pressure, condense into working fluid 13 and emit heat 15, working fluid 13 flows back to evaporator section 10a by capillarity along capillary structure 12 again.So circulation, heat 15 constantly reaches condensation segment 10b by the evaporator section 10a of heat pipe 10, and the low-temperature receiver of the section of being condensed 10b one end absorbs.

This working fluid 13 is heated, cools off, and changes between gas, liquid binary states and absorbs or emit a large amount of heat, thereby make heat reach the other end by heat pipe 10 1 ends.Though this kind heat pipe 10 has thermal conductivity and isothermal preferably, but working fluid 13 is less and heat pipe 10 is less with the heater element contact area in the heat pipe 10, the maximal heat transfer amount of heat pipe 10 is restricted, still can not satisfies the electronic element radiating requirement that caloric value improves constantly.

For increasing radiating efficiency, the heat pipe of another kind of prior art comprises that a heat absorption district, a radiating area, are arranged on the wire netting in the heat absorption district, this radiating area has S shape structure, and this S shape structure flow through stroke of this radiating area of working fluid that can extend is to increase radiating efficiency.This wire netting is combined into by metal fine that a plane is netted, the plane is netted is combined into a space network with expansion pattern, because this wire netting is by the metal fine be combined into, thereby make the heat absorption district less with the heater element contact area, the heat that heat pipe absorbs is still limited, still can't satisfy the heat radiation requirement of the electronic component that caloric value improves constantly.

[summary of the invention]

Below, a kind of heat pipe of high efficiency heat radiation will be described with embodiment.

For realizing foregoing, a kind of heat pipe is provided, this heat pipe comprises a hollow tube and is sealed in an amount of working fluid in the body, and wherein, this body comprises an evaporator section, a condensation segment, and this condensation segment has S shape structure, this evaporator section is a helical structure.

This heat pipe further is included in the some radiating fins that are provided with at interval on the condensation segment.

This heat pipe further is included in the thermal interface material that applies on evaporator section and the contacted part of heater element.

Compared with prior art, the heat pipe that the embodiment of the invention provides adopts the evaporator section of helical design, this evaporator section can make working fluid fully contact with heater element, effectively reduce the temperature of heater element, the steam that the working fluid evaporation produces is condensed into working fluid at condensation segment, this working fluid flows to evaporator section once more, spiral evaporator section can increase the contact area between working fluid and the heater element, the condensation segment of S shape can increase the flow through stroke of condensation segment of working fluid, accelerate condensation rate, improve radiating efficiency.

[description of drawings]

Fig. 1 is the plane of structure cut-away view of prior art heat pipe.

Fig. 2 is the radially cut-away view of heat pipe among Fig. 1.

Fig. 3 is the schematic perspective view of heat pipe first embodiment of the present invention.

Fig. 4 is the floor map of Fig. 3.

Fig. 5 is the schematic perspective view of heat pipe second embodiment of the present invention.

[specific embodiment]

To shown in Figure 4, first embodiment of the invention provides a kind of heat pipe 20 as Fig. 3, and this heat pipe 20 is a hollow tube, and it comprises evaporator section 22, transportation section 24, condensation segment 26 and is sealed in an amount of working fluid (figure does not show) in the heat pipe 20.Wherein, evaporator section 24 is a helical structure, and condensation segment 26 has S shape structure, and present embodiment is that double-spiral structure is that example describes with evaporator section 24.

Evaporator section 22 integral body are the double-layer spiral structure, it comprises superstructure 224, understructure 226, has the space between this superstructure 224 and the understructure 226, this each layer structure is the individual pen structure, working fluid is subjected to thermogenetic steam to flow to condensation segment 26 by superstructure 224, and working fluid flows to understructure 226 by condensation segment 26.This superstructure 224, understructure 226 also can be two circles or the above multi-turn structure of two circles.

Transportation section 24 can be partly adiabatic, it comprises steam channel 244 and fluid passage 246, the steam that evaporator section 22 produces flows in addition condensation of condensation segment 26 by superstructure 224 by steam channel 244, and condensed working fluid flows to the understructure 226 of evaporator section 22 to reduce the temperature of heater element through fluid passage 246.

Condensation segment 26 is the continuous S-shaped structure, and this S shape structure flow through stroke of condensation segment 26 of working fluid that can extend is accelerated the condensation rate of working fluid, improves radiating efficiency, and condensation segment 26 can be in the same plane with understructure 226.

The working fluid of sealing can be liquid such as pure water, ammoniacal liquor, methyl alcohol, acetone or heptane in the heat pipe 20, also can add the Heat Conduction Material particulate in this liquid, as copper powder, nano carbon material etc., to increase the heat conductivility of working fluid.

The heat that heater element produces makes working fluid be subjected to thermal evaporation to form steam, this steam flows to superstructure 224 by understructure 226, steam in the superstructure 224 flows to condensation segment 26 via steam channel 244 under slight pressure, steam is flowed to by condensation segment 26 1 ends constantly to condense into working fluid in the process of the other end and emit heat and distributes through condensation segment 26, working fluid flows back to evaporator section 22 once more through fluid passage 246, so repeatedly, the heat that heater element produces constantly is sent to condensation segment 26 through steam channel 244 by the evaporator section 22 of heat pipe 20, with the function that realizes the heat that heater element produces is distributed, reduce the temperature of heater element by this.

In addition, can below condensation segment 26, increase by a radiator fan in the time of use, this radiator fan can be blown into cool ambient air in the S shape structure of condensation segment 26, the temperature that can reduce condensation segment 26 effectively by cold air and contacting of condensation segment 26 so that the condensation rate of working fluid accelerate.

See also shown in Figure 5, second embodiment of the invention provides a kind of heat pipe 40, and this heat pipe 40 comprises evaporator section 42, transportation section 44, condensation segment 46, be arranged on some radiating fins 48 of condensation segment 46 and be sealed in an amount of working fluid (figure does not show) in the heat pipe 40.

Wherein, the structure of this evaporator section 42, transportation section 44, condensation segment 46 is identical with evaporator section 22, transportation section 24, condensation segment 26 respectively, evaporator section 42 comprises superstructure 424 and understructure 426, this superstructure 424, understructure 426 also can be the individual pen structure, its difference is: some radiating fins 48 are arranged on the condensation segment 46, can improve the radiating efficiency of heat pipe 40 by the radiating fin 48 that increases.

This superstructure 424, understructure 426 also can be respectively two circles or the above multi-turn structure of two circles.

The heat that heater element produces makes the working fluid vaporization form steam, this steam flows to superstructure 424 by the understructure 426 of evaporator section 42, the cooling back flows to condensation segment 46 by steam channel 444 a little in superstructure 424, the heat that the steam condensation produces is distributed in the surrounding environment by condensation segment 46 and radiating fin 48, and steam is condensed into working fluid and flows to the understructure 426 of evaporator section 42 once more through fluid passage 446 to reduce the temperature of heater element.

In addition, during use one radiator fan can be set below condensation segment 46, this radiator fan can be blown into the cold air in the external world in the S shape structure and radiating fin 48 of condensation segment 46, by contacting of cold air and condensation segment 46, radiating fin 48, can reduce the temperature of condensation segment 46 effectively, thereby the temperature of the working fluid of the condensation segment 46 of flowing through is reduced effectively.

This radiating fin 48 also can be arranged on the evaporator section 42, to reduce the temperature of evaporator section 42.

Heat pipe 20,40 can be further applies thermal interface material to increase the contact area of heat pipe 20,40 and heater element at understructure 226,426 lower surfaces of evaporator section 22,42, makes heat pipe effectively absorb the heat of heater element generation.

Evaporator section 22,42 is not limited to the double-spiral structure that embodiment provides, and more multi-layered helical structure can be set, and has the space between this adjacent layer, and evaporator section 22,42 also can be individual layer, multi-circle spiral flow structure.

The radial section of evaporator section 22,42 and condensation segment 26,46 can be standard circular, also can be other shape, as ellipse, triangle, rectangle or other polygonal shape.

This heat pipe 20,40 generally is material with copper, also can adopt different materials according to different needs, as aluminium, steel, carbon steel, stainless steel, iron, nickel, titanium etc. and alloy or thermal conductivity macromolecular material.

Claims

1. heat pipe, it comprises a hollow tube and is sealed in an amount of working fluid in the body, and this body comprises an evaporator section, a condensation segment, and this condensation segment has S shape structure, it is characterized in that: this evaporator section is a helical structure.

2. heat pipe as claimed in claim 1 is characterized in that: described helical structure is made up of multilayer.

3. heat pipe as claimed in claim 2 is characterized in that: have the space between the described adjacent layer.

4. heat pipe as claimed in claim 2 is characterized in that: described each helical layer structure is made up of individual pen.

5. heat pipe as claimed in claim 1 is characterized in that: described helical structure is made up of multi-turn.

6. heat pipe as claimed in claim 2 is characterized in that: described each layer is made up of multi-turn.

7. heat pipe as claimed in claim 2 is characterized in that: described evaporator section is the double-layer spiral structure.

8. heat pipe as claimed in claim 7 is characterized in that: described double-layer spiral structure comprises superstructure and understructure.

9. heat pipe as claimed in claim 8 is characterized in that: described understructure lower surface scribbles thermal interface material.

10. heat pipe as claimed in claim 1 is characterized in that: further be provided with some radiating fins on the described condensation segment.

11. heat pipe as claimed in claim 1 is characterized in that: further be provided with some radiating fins on the described evaporator section.

12. heat pipe as claimed in claim 1 is characterized in that: described working fluid is selected from pure water, ammoniacal liquor, methyl alcohol, acetone or heptane.

13. heat pipe as claimed in claim 12 is characterized in that: further comprise the Heat Conduction Material that is suspended in the working fluid in the described working fluid.

14. heat pipe as claimed in claim 13 is characterized in that: described Heat Conduction Material comprises copper powder or nano carbon material.

15. heat pipe as claimed in claim 1 is characterized in that: the radial section of described body is standard circular, ellipse, triangle or rectangle.

16. heat pipe as claimed in claim 8 is characterized in that: described heat pipe further comprises the transportation section that connects evaporator section and condensation segment.

17. heat pipe as claimed in claim 16 is characterized in that: described transportation section comprises the steam channel that connects superstructure and condensation segment, the fluid passage that is connected understructure and condensation segment.

18. heat pipe as claimed in claim 1 is characterized in that: the material of described heat pipe is aluminium, steel, carbon steel, stainless steel, iron, nickel, titanium, copper or thermal conductivity macromolecular material.