CN104121794B - A kind of unidirectional loop gravity assisted heat pipe and its manufacture method - Google Patents
A kind of unidirectional loop gravity assisted heat pipe and its manufacture method Download PDFInfo
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- CN104121794B CN104121794B CN201410360548.7A CN201410360548A CN104121794B CN 104121794 B CN104121794 B CN 104121794B CN 201410360548 A CN201410360548 A CN 201410360548A CN 104121794 B CN104121794 B CN 104121794B
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Abstract
The invention discloses a kind of unidirectional loop gravity assisted heat pipe, including liquid bag, nipple, necking reducer connector and long connecting tube；A kind of and manufacture method of unidirectional loop gravity assisted heat pipe.The present invention realizes throat structure by adding necking reducer connector in loop gravity assisted heat pipe, making the working medium inside loop gravity assisted heat pipe, flow direction uniquely determines at work, i.e. whole heat pipe shows one-way, so as to which more common loop gravity assisted heat pipe startup is more rapid, the heat of radiating end obtains more efficient utilization；In addition, the heating end of the present invention is located at the least significant end of heat pipe, this makes the present invention have wide applicability, and compact-sized, and cost is relatively low.
Description
Technical field
The present invention relates to heat transfer device field, relates more specifically to a kind of gravity assisted heat pipe, especially a kind of loop gravity
Heat pipe, and its manufacture method.
Background technology
Heat pipe be by therein working fluid phase transformation realize heat transfer heat transfer element, have very high thermal conductivity,
The advantages that excellent isothermal, extensive environmental suitability.Gravity assisted heat pipe is also known as thermal siphon, and heat pipe is realized by gravitational difference
Function.Gravity assisted heat pipe is a kind of heat pipe of no liquid-sucking core, therefore structure is relatively easy, of low cost, has been obtained at present extensively
Application.Inside heat pipe must possess a complete circuit and be flowed for working medium circulation, be that gravity assisted heat pipe can work normally fortune
Capable necessary condition.By endless tube structure, necessary one of its Inner Constitution working medium working cycles are complete to return loop gravity assisted heat pipe
Road.However, heating end is located at the typical loop gravity assisted heat pipe of least significant end at work, its internal working medium is often at the same time along two
Root pipe hoists flowing, and this phenomenon is particularly evident at work for the heat pipe of big liquid filled ratio (the liquid filled ratio ＞ 55% under room temperature).
Following drawback occurs after producing in this phenomenon：First, intraductal working medium from the minimum heating end of heat pipe at the same time along two pipelines to
Eminence flows, and " two crowns " phenomenon occurs so that the power pressure head of driving inside heat pipe working medium circulation flowing is weakened, so that hot
Pipe startup is slack-off, or even heat pipe cannot normally start work；Secondly, the direction that circulates of inside heat pipe working medium is in randomness
(or flowing clockwise or counterclockwise), is not easy to the transmission and utilization of heat pipe heat radiation end heat.
The content of the invention
In consideration of it, it is an object of the invention to provide a kind of working medium that can make inside heat pipe to have unidirectional stream at work
The unidirectional loop gravity assisted heat pipe and its manufacture method of dynamic property (hereinafter referred to as " one-way "), to overcome " two crowns ", startup slow, with
And flow direction does not know the problem of caused heat transfer efficiency is low.
As one aspect of the present invention, the present invention provides a kind of unidirectional loop gravity assisted heat pipe, including by liquid bag and company
Take over the loop formed.
Wherein, the connecting tube includes nipple and long connecting tube, between the nipple and long connecting tube also
It is communicated with necking reducer connector.
Wherein, the necking reducer connector is made of necking pipeline and the interface channel for having both ends, in the necking pipeline
Place forms throat structure, and the interface channel of the necking pipe ends is respectively communicated with the nipple and the long connecting tube.
Preferably, the internal diameter size at the necking pipeline of the necking reducer connector is inside the nipple communicated therewith
The 50~70% of pipe diameter.
Wherein, be additionally provided with flaring reducer union in the long connecting tube, the flaring reducer union by flaring pipeline,
Tubule interface channel and extra heavy pipe interface channel composition, the tubule interface channel and extra heavy pipe interface channel respectively with two sections
Long connection extra heavy pipe is connected with one end of long connecting hole, and the diameter of the flaring pipeline is more than the long connecting hole inner tube
The diameter in road and less than the diameter of long connection extra heavy pipe internal pipeline.
Wherein, the liquid bag, nipple, necking reducer connector and long connecting tube use and select white stainless steel, carbon steel
Or the same metal material in red copper is made.
Wherein, it is water to fill the working medium inside the unidirectional loop gravity assisted heat pipe, or Na, K mass percent are
22%：78% NaK alloys；And the room temperature liquid filled ratio of the working medium is 55~95%.
As another aspect of the present invention, the present invention also provides a kind of manufacture method of unidirectional loop gravity assisted heat pipe, bag
Include the following steps：
Working fluid bag, nipple, necking reducer connector, long connecting tube and implementation of port respectively；
The above-mentioned part for completing processing is cleaned, the liquid bag, nipple, necking reducer is then welded successively and connects
Head, long connecting tube form loop circuit heat pipe, and weld implementation of port in the tapping of the long connecting tube；
The loop circuit heat pipe completed to welding vacuumizes leak detection；
Vacuum degassing is carried out to the loop circuit heat pipe, the loop circuit heat pipe complete to degasification is hunted leak again；
The working medium is filled into inside heat pipe package by implementation of port, the heat pipe filled to completion seals at implementation of port
Dress.
Wherein, the step of soldering fluid bag, nipple, necking reducer connector, long connecting tube form loop circuit heat pipe
In further include long connecting tube be divided into the long connection extra heavy pipe of two sections and long connecting hole, successively soldering fluid bag, nipple,
The step of necking reducer connector, long connection extra heavy pipe, flaring reducer union, long connecting hole form loop circuit heat pipe, wherein the expansion
Mouth reducer union is made of flaring pipeline, tubule interface channel and extra heavy pipe interface channel, and the tubule interface channel and extra heavy pipe connect
One end connection that road is connected extra heavy pipe and the long connecting hole with the length respectively is connected, and the diameter of the flaring pipeline is more than
The diameter of the long connecting hole internal pipeline and less than the diameter of long connection extra heavy pipe internal pipeline.
Wherein, be to the standard of the loop circuit heat pipe leak detection vacuum for judging in the loop circuit heat pipe can reach 9 ×
10-4Below Pa.
According to the above-mentioned technical solution, the present invention has the following advantages：By adding necking in loop gravity assisted heat pipe
Throat structure is realized in reducer union, and making the working medium inside loop gravity assisted heat pipe, flow direction uniquely determines at work, i.e., whole
Heat pipe shows one-way；Due to one-way, the more common loop gravity assisted heat pipe of the present invention starts more rapid；Due to unidirectional
Property, the heat of the radiating end of heat pipe of the present invention is easy to obtain more efficient utilization；Heating end is located at the least significant end of heat pipe,
This heated structure determines that the present invention has wide applicability, and compact-sized, and cost is relatively low.
Brief description of the drawings
Fig. 1 is the structure chart of the unidirectional loop gravity assisted heat pipe of the embodiment of the present invention 1；
Fig. 2 be the embodiment of the present invention 1 unidirectional loop gravity assisted heat pipe in necking reducer connector structure chart；
Fig. 3 is the structure chart of the unidirectional loop gravity assisted heat pipe of the embodiment of the present invention 2；
Fig. 4 is the structure chart of the flaring reducer union of the unidirectional loop gravity assisted heat pipe of the embodiment of the present invention 2；
Fig. 5 is the structure chart of the necking reducer connector of the unidirectional loop gravity assisted heat pipe of the embodiment of the present invention 2；
Fig. 6 is the distribution schematic diagram of the pressure cooled region of the unidirectional loop gravity assisted heat pipe of the embodiment of the present invention 2；
Fig. 7 is the actual heat pipe photo of the unidirectional loop gravity assisted heat pipe one-way actual test of the embodiment of the present invention 2；
Fig. 8 is the heat pipe experimental data that liquid filled ratio is 94%；
Fig. 9 is the heat pipe experimental data that liquid filled ratio is 81%.
The implication of reference numeral in figure is：
A1, liquid bag, A2, nipple, A3, necking reducer connector, A4, long connecting tube, A5, implementation of port, A21, short connection
Pipe internal pipeline, A31, necking pipeline, A32, interface channel, A41, long connecting tube internal pipeline, B1, liquid bag, B2, short connection
Pipe, B3, necking reducer connector, B4, long connection extra heavy pipe, B5, implementation of port, B6, flaring reducer union, B7, long connecting hole, B21,
Nipple internal pipeline, B31, necking pipeline, B41, long connection extra heavy pipe internal pipeline, B61, flaring pipeline, B62, tubule connect
Road is connected, B63, extra heavy pipe interface channel, B71, long connecting hole internal pipeline, C1, heat affected zone, C2, can arrange to force to cool down
Region.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with specific embodiment, and reference
Attached drawing, the present invention is described in further detail.
The operation principle of unidirectional loop gravity assisted heat pipe of the present invention is：Unidirectional loop gravity assisted heat pipe of the present invention
During work, vertical to place in the work environment, liquid bag is located at the least significant end of whole heat pipe, the heating end as heat pipe.Liquid is wrapped
Hold the endless tube formed including nipple, necking reducer connector, long connecting tube can be as the radiating end of heat pipe.Liquid bag
Starting after being heated, the liquid refrigerant in liquid bag can gradually gasify, under the action of expanded by heating effect and buoyancy, internal work
Matter starts to wrap the nipple for holding two perforates to be connected with liquid with edge and long connecting tube rises the trend of flowing at the same time, therefore
Working medium in liquid bag is classified into two-way and rises flowing.Wherein working medium is flow to and nipple phase by nipple rising all the way
During necking position inside the necking reducer connector of connection, larger resistance can be run into, so as to significantly weaken from nipple
The power pressure head of the dynamic working medium of up-flow, necking, which is played, prevents the road working medium from breaking through the work that necking reducer connector continues up flowing
With；Meanwhile the another way working medium in liquid bag does not run into the resistance increased suddenly during being flowed up along long connecting tube,
Therefore more and more working medium can rise along long connecting tube in liquid bag.There is the work for rising flow tendency at the beginning in nipple
After matter runs into the necking of necking reducer connector, under the effect of gravity in flow back fluid bag, it will rise from long connecting tube side and flow.
Due to that can be cooled when working medium flows through heat pipe loop along long connecting tube, gaseous working medium therein is after the top of long connecting tube is flowed through
Liquefy to the cold, the position that liquid refrigerant Doenward flow is connected to the upper end of necking reducer connector with long connecting tube is formed, in necking
The upper end of the necking position of reducer union forms longer liquid refrigerant column, and under larger gravity, liquid refrigerant can be after
Necking position is flowed through in continuous decline, through in nipple flow back fluid bag.So far heat pipe launches into normal operating conditions completely, in it
The working medium in portion is circulated along the specific direction of liquid bag-long connecting tube-necking reducer connector-nipple-liquid bag, and formation has
The loop gravity assisted heat pipe of one-way.
Further, unidirectional loop gravity assisted heat pipe of the invention can also set flaring reducer union in long connecting tube,
Flaring reducer union can realize the pipeline connection of two kinds of different tube diameters as needed, them is collectively constituted long connecting tube；And
And since flaring reducer union enables to the internal pipeline sectional area of long connecting tube to increase, this can make working medium by being flared reducing
More smoothly flowed after connector.
More specifically, unidirectional loop gravity assisted heat pipe of the present invention, by shell and fills the working medium system inside shell
Form.All parts of shell are made of same metal material, and the selection of the metal material will meet and intraductal working medium
Compatibility Principle, can specifically use stainless steel, carbon steel or red copper etc., depending on filling working medium and the working condition needed.
Shell specifically includes the parts such as liquid bag, nipple, necking reducer connector, long connecting tube and implementation of port.Wherein, liquid bag is to use
Intermetallic composite coating into cavity, have two holes on its upper surface, be connected respectively with nipple and long connecting tube；Nipple and
By necking reducer fittings between long connecting tube, they form complete loop together with liquid bag.Necking reducer connector by
Necking pipeline and its interface channel at both ends composition, form throat structure, the internal diameter of necking pipeline is minimum, is at necking pipeline
Connect the 50~70% of the interface channel internal diameter of nipple, the interface channels of necking pipe ends be respectively communicated with nipple and
Long connecting tube, the internal diameter of interface channel are equal with the outside diameter of long connecting tube and nipple difference.On the top of long connecting tube
Perforate on the tube wall of a position, the hole are connected with implementation of port；Implementation of port is a thin short metal pipe.In addition, in long connecting tube
On flaring reducer union can also be set.Reducer union is flared by flaring pipeline, tubule interface channel, extra heavy pipe interface channel group
Into tubule interface channel is connected with long connecting hole, and for extra heavy pipe interface channel with long connection extra heavy pipe connection, the diameter for being flared pipeline is big
The diameter of extra heavy pipe internal pipeline is connected less than length in the diameter of long connecting hole internal pipeline, thus in flaring reducer union
It has been internally formed flaring pipeline.Compatibility requirements with envelope material will be met by filling the working medium inside heat pipe package, can be with
It under the room temperature such as water, NaK alloys (mass percent of Na, K are respectively 22%, 78%, hereinafter referred to as 22%-78%) is liquid to be
State, the working medium for being suitable for filling heat pipe, the volume filling weight under room temperature be the 55~95% of shell internal capacity, i.e. working medium
Room temperature liquid filled ratio is 55~95%.
Unidirectional loop gravity assisted heat pipe provided by the invention, has the characteristics that：1st, heating end is at work positioned at whole warm
The least significant end of pipe；2nd, loop by multiple duct sections and connects the connectors of these duct sections and forms, and is variable-diameter structure inside connector；
3rd, working medium can be for liquid, the working medium for being suitable for filling heat pipe under the room temperature such as water, NaK (22%-78%)；4th, liquid filled ratio exists
55%~95%；5th, the shell of heat pipe is the metal material that the working medium internal with filling it is compatible.Loop with These characteristics
Gravity assisted heat pipe will reach following purpose：During work, the flow direction of inside heat pipe working medium will uniquely determine, i.e., after starting every time
It will all be flowed along same (or counterclockwise) clockwise direction, there is one-way；This one-way effectively will avoid working medium by heat pipe
The appearance of minimum heating end while the flow phenomenon that hoists along two pipelines, so as to effectively avoid power pressure head from significantly being cut
It is weak；The startup time of heat pipe will shorten；Easy to preferably arrange the Application way of heat pipe heat radiation end heat.
A kind of main manufacturing process of unidirectional loop gravity assisted heat pipe of the present invention is as follows：Selected first according to purposes demand
Determine working medium and the metal material for being used to make heat pipe package compatible；Then processed respectively according to the characteristics of each part
Liquid bag, nipple, necking reducer connector, long connecting tube and implementation of port；The above-mentioned part for completing processing is cleaned, so
Soldering fluid bag, nipple, necking reducer connector, long connecting tube form loop circuit heat pipe successively afterwards, and in the perforate of long connecting tube
Place's welding implementation of port.The heat pipe package completed to welding vacuumizes leak detection, if vacuum can reach 9 × 10-4Pa then indicates pipe
The vacuum of shell reach heat pipe fill and job requirement.Vacuum degassing is carried out to shell afterwards, the shell complete to degasification is again
Leak detection, if vacuum still can reach 9 × 10-4Pa, then can fill working medium with opposite heat tube.Working medium enters heating pipe by implementation of port
Inside shell, its liquid filled ratio is in the range of 55~95%.The heat pipe filled to completion encapsulates at implementation of port.In the whole of working medium
In a filling process, heat pipe package planted agent's strict guarantee high vacuum environment, until completing encapsulation.So far, of the present invention one
The unidirectional loop gravity assisted heat pipe of kind completes.
Further, when setting flaring reducer union in long connecting tube, above-mentioned steps is equally performed, are simply being cleaned
With the flaring reducer union component that is made of flaring pipeline, tubule interface channel, extra heavy pipe interface channel is added in welding step.
The unidirectional loop gravity assisted heat pipe of the present invention is further elaborated with reference to specific embodiment.
Embodiment 1：
As shown in Figure 1, a kind of basic structure of unidirectional loop gravity assisted heat pipe shell of the present invention includes：Liquid bag A1,
Nipple A2, necking reducer connector A3, long connecting tube A4 and implementation of port A5.Wherein, liquid bag A1, nipple A2, necking
Reducer union A3, long connecting tube A4 use same metal material, and welding successively forms loop；Wherein, necking reducer connector
Structure inside A3 is as shown in Fig. 2, the long connecting tube A4 of upper end interface channel A32 connections of its internal necking pipeline A31, necking
The lower end interface channel A32 connection nipples A2 of pipeline A31；The diameter of necking pipeline A31 is respectively less than long connecting tube inner tube
The diameter of road A41 and nipple internal pipeline A21, therefore necking is formed at necking pipeline A31, to being flowed from nipple A2
Inhibition is played to the working medium of long connecting tube A4.The presence of throat structure can be played the role of hindering Working fluid flow, but excellent
Selection of land, the internal diameter size at the necking pipeline of necking reducer connector be the nipple internal pipeline diameter communicated therewith 50~
Best results when 70%.The top end opening of long connecting tube A4, welds with implementation of port A5, so far completes the processing of heat pipe package.
The heat pipe package machined is carried out vacuumizing leak detection, if vacuum can reach 9 × 10-4Pa then indicates the vacuum of shell
Reach heat pipe fill and job requirement.Vacuum degassing is carried out to shell afterwards, the shell complete to degasification is hunted leak again, if vacuum
Degree still can reach 9 × 10-4Pa, then opposite heat tube fill working medium.Working medium can be that water or NaK alloys (22%-78%) etc. are normal
Temperature is lower for liquid, the working medium for being suitable for filling heat pipe, is entered by implementation of port A5 inside heat pipe package, its liquid filled ratio 55~
In the range of 95%.The heat pipe filled to completion encapsulates at implementation of port.In the whole filling process of working medium, heat pipe package
Planted agent's strict guarantee high vacuum environment, until completing encapsulation.So far, a kind of unidirectional loop gravity assisted heat pipe of the present invention makes
Complete.
During work, a kind of unidirectional loop gravity assisted heat pipe of the present invention needs vertical placement, and wherein liquid bag A1 is positioned at most
Low side.Liquid bag A1 is directly heated as the heating end of heat pipe by heat source, its internal working medium due to heated there is rising flowing to become
Gesture；Nipple A2, necking reducer connector A3, long connecting tube A4 form the radiating end of heat pipe；Due in necking reducer connector A3
The necking pipeline A31 in portion from the nipple inner passage A21 inside nipple A2 to rising the working medium flowing to herein
Larger resistance is produced, makes it can not be quickly through herein；At the same time, the part in liquid bag A1 is connected by hot working fluid from long
Long connecting tube internal pipeline A41 in pipe A4 persistently rises flowing, and the top through long connecting tube A4 flow to necking reducer and connects
The upper end of head A3, under the effect of gravity, necking pipe road A31 is flowed through in decline, inside the nipple inside nipple A2
Pipeline A21 flow back fluid bag A1, complete heat absorption-heat release-circulation absorbed heat again.To sum up, the present invention realizes the list of loop gravity assisted heat pipe
To working characteristics, i.e., the working medium inside a kind of unidirectional loop gravity assisted heat pipe of the present invention at work all the time can be along liquid bag
The direction persistent loop flowing of A1- long connecting tube A4- necking reducer connector A3- nipple A2- liquid bags A1.
Embodiment 2：
A kind of unidirectional loop gravity assisted heat pipe of the present invention can also be completed with the different metal tube of diameter.Such as figure
Shown in 3, under some occasions, due to the limitation of space and heating end, the nipple B2 being connected with liquid bag and long connecting hole
B7 must use the thinner metal tube of same size, diameter.In order to strengthen heat dissipation, reduce flowing resistance of the working medium in heat dissipation pipeline
Power, generally requires to introduce one section of thicker long connection extra heavy pipe B4 in the heat pipe loop for play cooling effect, being formed has flaring
The thick of reducer union B6 and necking reducer connector B3, tubule heat dissipation loop.Thus, a kind of unidirectional loop weight of the present invention
The shell of power heat pipe can be by liquid bag B1, nipple B2, necking reducer connector B3, long connection extra heavy pipe B4, flaring reducer union
B6, long connecting hole B7 are welded successively, and implementation of port B5 is welded on the top of long connection extra heavy pipe B4.Wherein, long connection extra heavy pipe
The outside diameter and internal diameter of B4 is respectively more than the outside diameter and internal diameter of long connecting hole B7, outside diameter and the internal diameter difference of long connecting hole B7
Outside diameter and internal diameter equal to nipple B2.The structure of reducer union B6 is flared as shown in figure 4, inside flaring reducer union B6
The lower end for being flared pipeline B61 is tubule interface channel B62, it is connected with long connecting hole B7, inside flaring reducer union B6
The upper end for being flared pipeline B61 is extra heavy pipe interface channel B63, it is connected with long connection extra heavy pipe B4；Be flared the diameter of pipeline B61 between
Between the diameter of long connecting hole internal pipeline B71 and long connection extra heavy pipe internal pipeline B41, therefore, flaring pipeline B61 for from
The working medium of long connecting hole internal pipeline B71 to long connection extra heavy pipe internal pipeline B41 flowings forms flaring pipeline configuration；Necking becomes
The structure of drive connector B3 as shown in figure 5, the lower end of its internal necking pipeline B31 with the nipple inside nipple B2
Portion pipeline B21 is connected, the upper end of the necking pipeline B31 inside necking reducer connector B3 and the long connection inside long connection extra heavy pipe B4
Extra heavy pipe internal pipeline B41 is connected, and the diameter of necking pipeline B31 is respectively less than in long connection extra heavy pipe internal pipeline B41 and nipple
The diameter of portion pipeline B21.Remaining manufacturing process is with identical described in embodiment 1, and details are not described herein.
During work, the working medium of inside heat pipe can connect along liquid bag B1- long connecting holes B7- flaring reducer unions B6- long all the time
Connect the direction persistent loop flowing of extra heavy pipe B4- necking reducer connector B3- nipple B2- liquid bags B1.Remaining job requirement and work
It is similar to described in embodiment 1 to make situation.
As shown in fig. 6, can also heat pipe arrange to force cooled region C2 place opposite heat tube it is long connect extra heavy pipe B4 into
Row forces cooling, it is dissipated the high intensity heat at heat affected zone C1 faster.
The detection of one-way actual effect
Actually detected, the feelings of detection have been carried out to the one-way of the single-phase loop gravity assisted heat pipe described in the embodiment of the present invention 2
Shape is directly heated with flame as shown in fig. 7, be heating region wherein at the liquid bag B1 of bottom, and endless tube is positioned in indoor environment,
Radiate by the free convection of air to working medium therein.5 measuring points are sequentially arranged along endless tube, wherein measuring point 1 is located at chaotropic
On the wall for wrapping the nearer long connecting hole B7 of B1, wall of the measuring point 2 positioned at the long connecting hole B7 in lower end of flaring reducer union B6
On face, measuring point 3 is on the wall of the upper end length connection extra heavy pipe B4 of flaring reducer union B6, and measuring point 4 is positioned at long connection extra heavy pipe B4
On the wall of the other end, measuring point 5 is located on the wall of upper end length connection extra heavy pipe B4 of necking reducer connector B3, the temperature of each measuring point
Pass through thermocouple measurement.When heat pipe works, the working medium in bottom liquid bag B1 rises flowing due to heated, passes through 5 measuring points
The sequencing that position temperature significantly skyrockets, can examine according to the unidirectional loop gravity assisted heat pipe of the invention produced at work
Whether there is one-way.
Fig. 8, Fig. 9 be using water as working medium, liquid filled ratio be respectively 94%, 81% heat pipe work experimental data, heating zone
Domain is liquid bag B1.The experimental data of two heat pipes shows, when heat pipe starts work, measuring point 1, measuring point 2, measuring point 3, measuring point 4, survey
The temperature of point 5 is sequentially substantially improved with the passage of heating time, shows the working medium in heat pipe at work according to measuring point 1- in Fig. 7
The direction flowing of measuring point 2- measuring point 3- measuring point 4- measuring points 5, i.e., expand according to the liquid bag B1- long connecting holes B7- described in embodiment 2
The direction persistent loop flowing of mouth reducer union B6- long connection extra heavy pipe B4- necking reducer connector B3- nipple B2- liquid bags B1,
So as to have one-way when proving a kind of unidirectional loop gravity assisted heat pipe work of the present invention.
Particular embodiments described above, has carried out the purpose of the present invention, technical solution and beneficial effect further in detail
Describe in detail bright, it should be understood that the foregoing is merely the present invention specific embodiment, be not intended to limit the invention, it is all
Within the spirit and principles in the present invention, any modification, equivalent substitution, improvement and etc. done, should be included in the protection of the present invention
Within the scope of.
Claims (8)
1. a kind of unidirectional loop gravity assisted heat pipe, including the loop being made of liquid bag and connecting tube；
It is characterized in that, the connecting tube includes the first connecting tube and the second connecting tube, first connecting tube and the second connection
One end of pipe is connected with the liquid bag, and the other end is linked together by necking reducer connector；The second connecting tube ratio
The first connection pipe range；And
The necking reducer connector is made of the interface channel of necking pipeline and its both ends, and necking is formed at the necking pipeline
Structure, the interface channel of the necking pipe ends are respectively communicated with first connecting tube and second connecting tube.
2. unidirectional loop gravity assisted heat pipe according to claim 1, wherein at the necking pipeline of the necking reducer connector
Internal diameter size is the 50~70% of the first connecting tube internal pipeline diameter communicated therewith.
3. unidirectional loop gravity assisted heat pipe according to claim 1, wherein second connecting tube is divided into two sections and passes through
The 3rd connecting tube and the 4th connecting tube of reducer union connection are flared, the flaring reducer union is by flaring pipeline, the first connection
Passage and the second interface channel composition, first interface channel and the second interface channel respectively with the 3rd connecting tube and the
One end connection of four connecting tubes, and the diameter of the flaring pipeline is more than the diameter of the 4th connecting tube internal pipeline and is less than
The diameter of the 3rd connecting tube internal pipeline.
4. unidirectional loop gravity assisted heat pipe according to any one of claims 1 to 3, wherein the liquid bag, the first connecting tube, contracting
Mouth reducer union and the second connecting tube are made of the same metal material in stainless steel, carbon steel or red copper.
5. unidirectional loop gravity assisted heat pipe according to any one of claims 1 to 3, wherein filling in the unidirectional loop gravity
The working medium of inside heat pipe is water, or Na, K mass percent are 22%：78% NaK alloys；And the room temperature of the working medium
Liquid filled ratio is 55~95%.
6. a kind of manufacture method of unidirectional loop gravity assisted heat pipe, comprises the following steps：
Working fluid bag, the first connecting tube, necking reducer connector, the second connecting tube and implementation of port respectively；Wherein, described first connects
Adapter is shorter than second connecting tube；
The above-mentioned part for completing processing is cleaned, the liquid bag, the first connecting tube, necking reducer is then welded successively and connects
Head, the second connecting tube form loop circuit heat pipe, and the tapping welding implementation of port in second connecting tube；
The loop circuit heat pipe completed to welding vacuumizes leak detection；
Vacuum degassing is carried out to the loop circuit heat pipe, the loop circuit heat pipe complete to degasification is hunted leak again；
Working medium is filled into inside heat pipe package by implementation of port, the heat pipe filled to completion encapsulates at implementation of port；
Wherein, the necking reducer connector is made of the interface channel of necking pipeline and its both ends, the shape at the necking pipeline
Into throat structure, the interface channel of the necking pipe ends is respectively communicated with first connecting tube and second connecting tube.
7. the manufacture method of unidirectional loop gravity assisted heat pipe according to claim 6, wherein soldering fluid bag, the first connecting tube,
Further included in the step of necking reducer connector, the second connecting tube form loop circuit heat pipe and the second connecting tube is divided into the of two sections
Three connecting tubes and the 4th connecting tube, successively soldering fluid bag, the first connecting tube, necking reducer connector, the 3rd connecting tube, flaring reducing
The step of connector, the 4th connecting tube form loop circuit heat pipe；Wherein, the diameter of the 3rd connecting tube internal pipeline is more than described the
The diameter of four connecting tube internal pipelines, the flaring reducer union is by flaring pipeline, the first interface channel and the second interface channel
Composition, first interface channel and the second interface channel one end with the 3rd connecting tube and the 4th connecting tube respectively
Connection, and the diameter of the flaring pipeline is more than the diameter of the 4th connecting tube internal pipeline and is less than inside the 3rd connecting tube
The diameter of pipeline.
8. the manufacture method of unidirectional loop gravity assisted heat pipe according to claim 6, wherein to loop circuit heat pipe leak detection
Standard is to judge that can the vacuum in the loop circuit heat pipe reach 9 × 10-4Below Pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410360548.7A CN104121794B (en) | 2014-07-25 | 2014-07-25 | A kind of unidirectional loop gravity assisted heat pipe and its manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410360548.7A CN104121794B (en) | 2014-07-25 | 2014-07-25 | A kind of unidirectional loop gravity assisted heat pipe and its manufacture method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104121794A CN104121794A (en) | 2014-10-29 |
| CN104121794B true CN104121794B (en) | 2018-05-11 |
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| CN201410360548.7A Active CN104121794B (en) | 2014-07-25 | 2014-07-25 | A kind of unidirectional loop gravity assisted heat pipe and its manufacture method |
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| CN111578756A (en) * | 2020-04-02 | 2020-08-25 | 南方科技大学 | Gradient wettability loop heat pipe |
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| CN104121794A (en) | 2014-10-29 |
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