CN208205885U - A kind of two-tube nested type heat pipe - Google Patents
A kind of two-tube nested type heat pipe Download PDFInfo
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- CN208205885U CN208205885U CN201820415776.3U CN201820415776U CN208205885U CN 208205885 U CN208205885 U CN 208205885U CN 201820415776 U CN201820415776 U CN 201820415776U CN 208205885 U CN208205885 U CN 208205885U
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Abstract
The utility model discloses a kind of two-tube nested type heat pipes, including interior heat pipe and outer heat pipe；Wherein, interior heat pipe is sheathed in outer heat pipe；The inner wall of interior heat pipe is equipped with the first capillary structure layer, has first annular seal space in interior heat pipe, is filled with the first working media in first annular seal space；The second capillary structure layer and the second seal chamber are provided between outer heat pipe and interior heat pipe, the second seal chamber is along outer heat pipe axially through setting, and the second seal chamber is interior to be filled with the second working media, and the boiling point of the second working media is higher than the first working media.In the above manner, the two-tube nested type heat pipe of the utility model can be run under big temperature difference environment, it can guarantee that adopting heat pipes for heat transfer performance is not influenced by difference variation to the full extent simultaneously, heat radiation power height, long transmission distance are able to solve the great occasion heat transfer requirement of adverse circumstances, difference variation.
Description
Technical field
The utility model relates to heat transfer unit (HTU)s, and in particular to a kind of two-tube nested type heat pipe.
Background technique
Heat pipe is the heat transfer element that heat transfer is realized by therein Working fluid phase changing, is not required to also be not required to by external force
Big sectional area is wanted, just can be carried out long range, efficient heat transmission.Compared with other conventional thermal conductive elements, heat pipe has
The advantages that heat-transfer capability is big, isothermal is good and variable heat flux density, thus, in many heat transfer elements, heat pipe referred to as most has
The heat transfer element of effect is widely used in electronic radiation field, becomes high power, high heat flux density chip heat radiator is generally adopted
Core component.
But the heat-transfer capability of heat pipe is not infinitely great, the phase transformation of operating temperature range and heat transfer property and inside
Working medium has much relations, and the operating temperature of different working medium differs greatly, and liquid transmission coefficient is also larger with temperature influence, therefore
In the case where temperature difference between the two ends end to end very big (100 DEG C of >), selected working medium is often unable to reach optimal liquid transmission system
Number, influences heat transfer efficiency.
In space flight, the fields such as fuel Heating of ultralow temperature optics and internal combustion engine, usually it is faced in the temperature difference huge (tens
Spend several Baidu) in the environment of apply adopting heat pipes for heat transfer situation.Such as in lunar surface detection optical device, heat pipe will face -180 DEG C
To+90 DEG C of huge temperature difference working environment；During internal combustion engine winter starting, heat pipe needs will be in 200 DEG C or so of tail gas
Heat imported into 0 DEG C of fuel oil below.In this case, traditional solution is using a kind of single work model
It encloses biggish substance to work as heat pipe, however, the huge temperature difference undoubtedly will affect the liquid transmission coefficient of working medium, and then influence
The transmittability of heat pipe.
In addition, the heat-transfer rate of heat pipe is fast, thermal capacitance is small, the cooling and heating for agreeing with very much batteries of electric automobile component are needed
It asks, but operating temperature range required by automobile, is difficult to match with existing heat pipe.Such as: the working environment of automobile component needs
At -40-120 DEG C, although and the heat pipe performance of internal water-filling is best, operating temperature is at 30-250 DEG C, wherein -40-30 DEG C
Temperature range cannot cover.Thus, not only met performance requirement without suitable phase-change working substance, but also meet the requirement of working environment.
If be combined using the heat pipe of different working medium come work, and encounter the limitation of system complexity, cost, installation space.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of two-tube nested type heat pipe and its manufacturing method, should
Heat pipe can be run under big temperature difference environment, while can guarantee adopting heat pipes for heat transfer performance not by difference variation shadow to the full extent
It rings, heat radiation power height, long transmission distance are able to solve the great occasion heat transfer requirement of adverse circumstances, difference variation.
The technical scheme adopted by the utility model is a kind of two-tube nested type heat pipe, including interior heat pipe and outer heat pipe；Institute
Interior heat pipe is stated to be sheathed in the outer heat pipe；The inner wall of the interior heat pipe is equipped with the first capillary structure layer, in the interior heat pipe
With first annular seal space, the first working media is filled in the first annular seal space；Between the outer heat pipe and the interior heat pipe
It is provided with the second capillary structure layer and the second seal chamber, second seal chamber is along the outer heat pipe axially through setting, institute
It states filled with the second working media in the second seal chamber, the boiling point of second working media is lower than first working media
Boiling point.
According to one specific embodiment of the utility model, the interior heat pipe is round tube, oval pipe, rectangular tube or rectangle
Pipe.
According to one specific embodiment of the utility model, the outer heat pipe is round tube, oval pipe, rectangular tube or rectangle
Pipe.
According to one specific embodiment of the utility model, first capillary structure layer is sintering metal powder, concave-convex ditch
Slot or metal mesh.
According to one specific embodiment of the utility model, second capillary structure layer is sintering metal powder, concave-convex ditch
Slot or metal mesh.
According to one specific embodiment of the utility model, the interior heat pipe and the concentric setting of outer heat pipe.
According to one specific embodiment of the utility model, the interior heat pipe and the different axle center setting of the outer heat pipe.
According to one specific embodiment of the utility model, the both ends of the interior heat pipe are sealed, and wherein one end is in cylindrical body, another
It holds funnel-shaped and stretches out the outer heat pipe；One end of the outer heat pipe seals and funnel-shaped, the other end it is funnel-shaped and with
The interior heat pipe cooperation stretched out is tightly connected.
The advantageous effects of the utility model are: the utility model provides a kind of two-tube nested type heat pipe, which adopts
With two-tube nesting type structure, interior heat pipe uses different working medias from outer heat pipe, and the first work filled in interior heat pipe
Medium boiling point is lower than the second working media boiling point filled in outer heat pipe, so as to enable the utility model heat pipe in the big temperature difference
It is run under environment, while can guarantee that adopting heat pipes for heat transfer performance is not influenced by difference variation to the full extent, heat radiation power is high, passes
Defeated distance is remote, is able to solve the great occasion heat transfer requirement of adverse circumstances, difference variation.
Detailed description of the invention
Illustrate the technical scheme in the embodiment of the utility model in order to clearer, it below will be to required in embodiment description
Attached drawing to be used briefly describes.
Fig. 1 is the structural schematic diagram of two-tube one embodiment of nested type heat pipe of the utility model；
Fig. 2 is the cross section structure schematic diagram of II-II line along Fig. 1；
Fig. 3 is the section enlarged structure schematic diagram of III-III line along Fig. 1.
Specific embodiment
It is carried out with reference to embodiments with technical effect of the attached drawing to the design of the utility model, specific structure and generation clear
Chu is fully described by, to fully understand the purpose of this utility model, scheme and effect.It is understood that described herein
Specific embodiment is only used for explaining the utility model, rather than the restriction to the utility model.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
The descriptions such as upper and lower, left and right used in the utility model are only each composition portion of the utility model in opposite figure
Divide for mutual alignment relation, and term " includes " and " having " and their any deformations, it is intended that covering is non-exclusive
Include.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
It is contained at least one embodiment of the utility model., which there is the phrase, in each position in the description to be each meant
Identical embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art are explicit
Ground and implicitly understand, the features in the embodiments and the embodiments of the present application can be mutual group in the absence of conflict
It closes.
Show also referring to the structure that Fig. 1, Fig. 2 and Fig. 3, Fig. 1 are two-tube one embodiments of nested type heat pipe of the utility model
It is intended to, Fig. 2 is the cross section structure schematic diagram of II-II line along Fig. 1, and Fig. 3 is that the section enlarged structure of III-III line along Fig. 1 is shown
It is intended to.
As shown in Figure 1, Figure 2 and Figure 3, the two-tube nested type heat pipe of the present embodiment includes interior heat pipe 10 and outer heat pipe 20, interior heat
Pipe 10 is sheathed in outer heat pipe 20.Wherein, interior heat pipe 10 and outer heat pipe 20 can be by the good metal material systems of the thermal conductivity such as copper, aluminium
At specific material, length and pipe thickness can be depending on actual requirements.
In the present embodiment, interior heat pipe 10 and outer heat pipe 20 are the round tube of different tube diameters, concentric setting.In other realities
Shi Zhong, interior heat pipe 10 and outer heat pipe 20 can also be other shapes, such as oval pipe, rectangular tube or rectangular tube, and 10 He of interior heat pipe
The shape of outer heat pipe 20 can be identical, can not also be identical, and the application does not limit the shape of interior heat pipe 10 and outer heat pipe 20 specifically
It is fixed.In addition, the also different axle center setting of interior heat pipe 10 and outer heat pipe 20.
For the ease of processing, as shown in Fig. 2, in the present embodiment, the both ends of interior heat pipe 10 seal, wherein one end is in cylinder
Body, the other end is funnel-shaped and stretches out outer heat pipe 20；And one end of outer heat pipe 20 seals and funnel-shaped, the other end is funnel-shaped
And cooperates with the interior heat pipe 10 of stretching and be tightly connected.
There is first annular seal space 12 in interior heat pipe 10, mainly as steam diffusion admittance.It is filled in first annular seal space 12
First working media, is usually evacuated in first annular seal space 12 or close to vacuum, heated in favor of the first working media
Evaporation, the first working media can be the low-boiling liquid such as methanol, ammonium hydroxide, freon.It is provided on the inner wall of interior heat pipe 10
First capillary structure layer 14, flow channel of first capillary structure layer 14 mainly as the first working media liquid.First capillary
Structure sheaf 14 can be sintering metal powder (such as sintered copper powder), concave-convex groove or metal mesh (such as copper mesh, stainless (steel) wire or compound
Net made of the braiding of metal material bunch etc.).
The second capillary structure layer 22 and the second seal chamber 24 are provided between outer heat pipe 20 and interior heat pipe 10.Wherein, second
Capillary structure layer 22 can also be sintering metal powder (such as sintered copper powder), concave-convex groove or metal mesh (such as copper mesh, stainless (steel) wire
Or net made of the braiding of composite material bunch etc.), the material knot of the second capillary structure layer 22 and the first capillary structure layer 14
Structure can be identical, can also be different.Second seal chamber 24 along outer heat pipe 20 axially through setting, filled with the in the second seal chamber 24
Two working medias, the second seal chamber 24 mainly as the second working media steam diffusion admittance, in the second seal chamber 24 usually
Also it is evacuated or close to vacuum, so that the second working media is by thermal evaporation.Second working media can be deionization
The low-boiling point liquids such as water, the boiling point of the second working media need to usually be higher than the boiling point of the first working media.
In use, if outer heat pipe 20 encounters low temperature, the icing of the second working media can not start work, when outer heat
After the second working media in pipe 20 is absorbed into the heat of heat source, the second working media of corresponding near heating sources gradually melts, and
Interior heat pipe 10 and the first working media therein are transferred heat to, the first working media boiling point is lower, and interior heat pipe 10 first starts
Work, and then make its thawing, outer heat pipe 20 starts work immediately in internal the second working media heated in outer heat pipe 20 simultaneously
Make.It is run under big temperature difference environment to be able to achieve, while can guarantee adopting heat pipes for heat transfer performance not by the temperature difference to the full extent
Variation influences, and heat radiation power height, long transmission distance are able to solve the great occasion heat transfer requirement of adverse circumstances, difference variation.
In addition, the utility model additionally provides the manufacturing method of the above two-tube nested type heat pipe.In one embodiment, specifically
Manufacturing method the following steps are included:
1) heat pipe in manufacturing: including taking the first hollow tube, the greasy dirt of tube body is removed to be further ensured that the cleaning of tube body.
Then it machine for shrinking can be used to carry out necking down processing to the tail end of the first hollow tube, funnel-form be usually made, in order to subsequent
Vacuum pumping.First capillary structure layer is set on the inner wall of the first hollow tube again, may then use that machine for shrinking by tube body
Head end is made predetermined shape (such as circle), and is sealed the head end of the first hollow tube using argon arc welding.
Wherein, the tube body made of the thermal conductivity such as copper, aluminium good metal material can be selected in the first hollow tube, in first
Blank pipe body usually selects round tube, but can according to circumstances select square tube or other shapes tube body.
Setting for the first capillary structure layer, specifically, it may include following steps:
S11: taking a center bar compatible with the first hollow tube, and center bar is inserted into the first hollow tube.Center
Stick is generally circular in cross section, and under normal conditions, and center bar is concentric with the first hollow tube when being inserted into；In addition, center bar can also be
It is semicircle, rectangular etc., it can also be used and be inserted into the different axle center of the first hollow tube.
S12: capillary structure raw material is taken to be filled in the hole between center bar and the first hollow tube.Wherein, capillary knot
Structure raw material can be the good metal powder of heating conduction or metal mesh, such as copper powder, copper mesh；If the capillary structure raw material of filling is
Metal powder, can be by vibration powder machine, and shake powder on vibration powder machine, and capillary structure raw material is filled into center bar and the first hollow tube
Between.
S13: the first hollow tube of sintering is until capillary structure raw material and the inner wall of the first hollow tube are sintered into one.Tool
Body, it vacuum atmosphere sintering furnace can be used to be sintered under 900-1050 degrees celsius.
S14: center bar is taken out, forms the first capillary structure layer on the first hollow tube inner wall.
Aligning arbor is positioned when carrying out filling out powder for the ease of center bar insertion tube body, is contracted to the first hollow tube
When neck is processed, the tail end of the first hollow tube can be contracted to to block center bar to prevent its stretching, for example, for round the
The tail end of first hollow tube can be contracted to the outer diameter that internal diameter is less than or equal to center bar by one hollow tube and center bar.?
In other embodiments, it can also cancel and it can also be used to the necking down process of the first hollow tube tail end or the positioning of center bar
He crosses mode by location structure.
In other embodiments, can also pre-fabricated capillary structure, then by sintering or other modes be fixed to first
On hollow tube inner wall, so as to form the first capillary structure layer on the first hollow tube inner wall.
2) it manufactures outer heat pipe: including taking the second hollow tube, removing the greasy dirt of tube body to be further ensured that the cleaning of tube body.
Then machine for shrinking can be used to carry out necking down processing to the tail end of the second hollow tube, predetermined shape (such as funnel-form) is made.Again
The first hollow tube after step 1) processing is inserted into inside the second hollow tube, the tail end of usual first hollow tube stretches out the
Two hollow tubes certainly, when processing conditions allows, can not also limit in first in order to subsequent vacuum pumping
The tail end of blank pipe body stretches out the second hollow tube.Second capillary is then set between the first hollow tube and the second hollow tube
Structure sheaf and along the second hollow tube axially through cavity.Finally, by an end closure of the second hollow tube, it is specific to can be used
Fill solder is sealed in the gap between the second hollow tube and the first hollow tube tail end using the method for Diffusion Welding
Mouthful.Machine for shrinking to can be used to carry out necking down processing to the tail end of the second hollow tube also convenient for subsequent vacuum pumping.
Wherein, the second hollow tube generally also selects circle tube body made of the good metal material of the thermal conductivity such as copper, aluminium.
Certainly, the tube body of other shapes or heat-conducting can also according to circumstances be selected.Usual first hollow tube is hollow relative to second
The concentric insertion of tube body.In other embodiments, the necking down manufacturing procedure to the head end of the second hollow tube can also equally be cancelled.
Setting for the second capillary structure layer, specifically, it may include following steps:
S21: taking center bar, and center bar is inserted into the gap between the first hollow tube and the second hollow tube；Wherein,
Center bar can be round, semicircle, rectangular etc., number can as the case may be depending on, it is optional one or more (such as 2,
4,5,8 etc.), according to a plurality of center bar, the first hollow tube is circumferentially uniformly usually inserted in along the first hollow tube
And in the second gap between hollow tube.
S22: capillary structure raw material is taken to be filled in the gap between center bar and the first hollow tube, the second hollow tube
It is interior；Wherein, capillary structure raw material can be metal powder or metal mesh etc., such as copper powder or copper mesh.
S23: inner wall, first hollow tube of the second hollow tube of sintering up to capillary structure raw material and the second hollow tube
Outer tube wall be sintered into one；Specifically, vacuum atmosphere sintering furnace can be used to be sintered under 900-1050 degrees celsius.
S24: center bar is taken out, forms the second capillary structure layer and edge between the first hollow tube and the second hollow tube
Second hollow tube axially through cavity.
3) it fills working media: filling the first work into the first hollow tube including the tail end by the first hollow tube
Medium is vacuumized, is sealed；The second working media is filled into the second hollow tube by the head end of the second hollow tube, is taken out true
Empty, sealing, and then the two-tube nested type heat pipe of finished product, wherein the first hollow tube is interior heat pipe, and the second hollow tube is
Outer heat pipe, and first annular seal space, the second seal chamber are formed by center bar respectively.
Wherein, the low boilings such as deionized water, methanol, ammonium hydroxide, freon can be selected in the first working media and the second working media
The liquid of point, but the boiling point of the first working media need to be lower than the boiling point of the second working media.In addition, to the first hollow tube and
Two hollow tubes fill working media sequence can as the case may be depending on, it is however generally that, the two filling sequencing do not make
It is required that.
Above with respect to the description of the first hollow tube and the head end, tail end of the second hollow tube, mainly for distinguishing
And explanation, in order to understand, without substantive restriction effect.
It by two-tube nested type heat pipe obtained by above method, can be run under big temperature difference environment, while can be most
Guarantee that adopting heat pipes for heat transfer performance is not influenced by difference variation in big degree, heat radiation power height, long transmission distance are able to solve severe ring
Border, the great occasion heat transfer requirement of difference variation.
The utility model provides a kind of heat-transferring method, specifically includes the following steps:
1) it is heated by heat source to nested type conductive structure, wherein nested type conductive structure includes the first hollow heat-conducting part
Part and the second hollow conducting-heat elements, the first hollow conducting-heat elements are sheathed in the second hollow conducting-heat elements, the first hollow heat-conducting part
There is first annular seal space in part, be filled with the first working media in first annular seal space；Second hollow conducting-heat elements and first hollow
Be provided with the second seal chamber between conducting-heat elements, the second seal chamber along the second hollow conducting-heat elements axially through setting, second
It is filled with the second working media in seal chamber, the first working media and the second working media are low-boiling point liquid, and the first work
The boiling point for making medium is lower than the boiling point of the first working media；
2) the second working media is transferred heat to after the second of nested type conductive structure the hollow conducting-heat elements heat absorption, then led to
It crosses the second working media and transfers heat to the first hollow conducting-heat elements, heat is transferred in turn in the first hollow conducting-heat elements
First working media makes the first working media evaporate to form steam, and the first working media steam carries heat in first annular seal space
Interior diffusion, to heat the second hollow conducting-heat elements from inside simultaneously.
Two-tube nested type heat pipe in above embodiments is also to be conducted heat using the similar above heat-transferring method, more than utilization
Heat transfer type, can farthest reduce the influence of circumstance of temperature difference variation, and heat transfer effect height, long transmission distance solve severe ring
The big occasion heat transfer requirement of border, difference variation.
In addition, the utility model also provides a kind of nested type conductive structure to conduct heat using the above heat-transferring method, it should
Nested type conductive structure includes the first hollow conducting-heat elements and the second hollow conducting-heat elements, and the first hollow conducting-heat elements are sheathed on the
In two hollow conducting-heat elements, there is first annular seal space in the first hollow conducting-heat elements, work in first annular seal space filled with first
Medium；The second seal chamber is provided between second hollow conducting-heat elements and the first hollow conducting-heat elements, the second seal chamber is along second
Hollow conducting-heat elements axially through setting, the second working media is filled in the second seal chamber；First working media and second
Working media is low-boiling point liquid, and the boiling point of the first working media is lower than the boiling point of the second working media.
Wherein, the first hollow conducting-heat elements and the second hollow conducting-heat elements concretely hollow thermally conductive tube body, first is hollow
Also settable first capillary structure layer on the inner wall of conducting-heat elements, between the second hollow conducting-heat elements and the first hollow conducting-heat elements
Also settable second capillary structure layer, is arranged through the above structure, may make up the two-tube nested type heat of similar above embodiments
Pipe.
The utility model nested type conductive structure can farthest reduce circumstance of temperature difference by using the above heat transfer type
The influence of variation, heat transfer effect height, long transmission distance, solves the big occasion heat transfer requirement of adverse circumstances, difference variation.
Although specifically showing and describing the utility model in conjunction with preferred embodiment, those skilled in the art is answered
This is understood, in the spirit and scope for not departing from the utility model defined by described claims, in form and details
On the utility model can be made a variety of changes, be the protection scope of the utility model.
Claims (8)
1. a kind of two-tube nested type heat pipe, which is characterized in that including interior heat pipe and outer heat pipe；The interior heat pipe is sheathed on described outer
In heat pipe；The inner wall of the interior heat pipe is equipped with the first capillary structure layer, has first annular seal space in the interior heat pipe, and described the
The first working media is filled in one seal chamber；Be provided between the outer heat pipe and the interior heat pipe the second capillary structure layer and
Second seal chamber, second seal chamber along the outer heat pipe axially through setting, filled with the in second seal chamber
Two working medias, the boiling point of second working media are higher than the boiling point of first working media.
2. two-tube nested type heat pipe according to claim 1, which is characterized in that the interior heat pipe is round tube, ellipse
Pipe, rectangular tube or rectangular tube.
3. two-tube nested type heat pipe according to claim 1, which is characterized in that the outer heat pipe is round tube, ellipse
Pipe, rectangular tube or rectangular tube.
4. two-tube nested type heat pipe according to claim 1, which is characterized in that first capillary structure layer is sintered gold
Belong to powder, concave-convex groove or metal mesh.
5. two-tube nested type heat pipe according to claim 1, which is characterized in that second capillary structure layer is sintered gold
Belong to powder, concave-convex groove or metal mesh.
6. two-tube nested type heat pipe according to claim 1, which is characterized in that the interior heat pipe and the outer heat pipe are coaxial
Heart setting.
7. two-tube nested type heat pipe according to claim 1, which is characterized in that the interior heat pipe and the different axis of outer heat pipe
Heart setting.
8. two-tube nested type heat pipe according to any one of claims 1 to 7, which is characterized in that the both ends of the interior heat pipe
Sealing, wherein one end is in cylindrical body, and the other end is funnel-shaped and stretches out the outer heat pipe；One end of the outer heat pipe seals and is in
Funnel-form, the other end interior heat pipe cooperation funnel-shaped and with stretching are tightly connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820415776.3U CN208205885U (en) | 2018-03-26 | 2018-03-26 | A kind of two-tube nested type heat pipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820415776.3U CN208205885U (en) | 2018-03-26 | 2018-03-26 | A kind of two-tube nested type heat pipe |
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| Publication Number | Publication Date |
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| CN208205885U true CN208205885U (en) | 2018-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469194A (en) * | 2018-03-26 | 2018-08-31 | 华南师范大学 | A kind of two-tube nested type heat pipe and its manufacturing method |
-
2018
- 2018-03-26 CN CN201820415776.3U patent/CN208205885U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469194A (en) * | 2018-03-26 | 2018-08-31 | 华南师范大学 | A kind of two-tube nested type heat pipe and its manufacturing method |
| CN108469194B (en) * | 2018-03-26 | 2024-02-23 | 华南师范大学 | Double-tube nested heat pipe and manufacturing method thereof |
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