CN1192203C

CN1192203C - Plate loop heat pipe (II)

Info

Publication number: CN1192203C
Application number: CNB011311991A
Authority: CN
Inventors: 李嘉豪
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-09-06
Filing date: 2001-09-06
Publication date: 2005-03-09
Anticipated expiration: 2021-09-06
Also published as: CN1403778A

Abstract

The present invention relates to a flat plate loop type heat pipe. A channel which is composed of a plurality of leading assemblies is arranged in a hollow shell body. At least one loop is formed in the shell body by the leading assemblies. The loop is formed in the way that an evaporating zone, a steam channel, a condensing zone and a fluid returning channel are orderly connected in series. The shell body is filled with a proper amount of liquid. The fluid returning channel and the steam channel are respectively separate channels. The fluid returning channel is provided with a capillary tissue; the flow resistance of the steam channel is smaller than that of the fluid returning channel. When the evaporating zone is heated, and the condensing zone dissipates heat, all fluids in the loop are made to stably flow in the same direction without conflicts. All the fluids can flow across each part of the loop, so non-condensable gas which exists in the loop flows along the loop, and has little effect on the temperature equalizing performance of the loop so that the heat pipe has good temperature equalizing performance and large heat transferring amount.

Description

Flat type loop type heat pipe (two)

Technical field

The invention belongs to a kind of flat type loop type heat pipe, particularly a kind of hot biography amount is big, uniform temperature is good, and for the not concretive gas heat exchange structure little to the circuit system properties influence that exists in the heat pipe.

Background technology

Existing heat pipe owing to have goodish heat transmitting, has been widely used in the radiating subassembly of electronic building brick.The radiating subassembly of common heat pipe-type, has a heat pipe 1, be provided with a heat-conducting block 11 at the electronic building brick end, heat-conducting block 11 joins with an end of heat pipe 1, the other end of heat pipe 1 can join through another heat-conducting block and heat-exchange device, or heat pipe 1 other end directly is folded with several radiating fins 12, as shown in Figure 1, promptly is the heat pipe of radiating fin 12 formulas.

The manufacturing of heat pipe, it is the step that is used for interior cleaning of heat pipe and degasification that quite high a part of cost is arranged, just carry out operation clean and that vacuumize in the heat pipe, cleanliness factor and vacuum are high more, the heat exchange action effect that can reach is good more, can guarantee heat conducting stability more, but, the not concretive gas (non-condensing gas) that still has trace in the passage, the passage of not concretive gas in heat pipe, can produce and gather, the evaporating area temperature difference of zone that it gathers and heating end is very big, just has influence on the smoothness of heat pipe running.Wherein not concretive gas is easy to be accumulated in the end at condensing zone passage place, can decline to a great extent and its uniform temperature and heat are passed on Gong.

Heat pipe 1 provides the generation of steam flow for the evaporating area of hot-zone at heat-conducting block 11, making steam flow is that the condensing zone of cold-zone flows along passage towards the other end, make the steam flow condensation form condensate liquid stream then at the passage place of cold-zone, relend the capillary structure 13 that helps in the passage apace with condensate liquid stream by the cold-zone towards the hot-zone pilot flow, flash to the part of gas in order to replenish evaporating area liquid, to constitute flowing of circulation.

When heat pipe 1 one ends are heated and make liquid evaporation in the heat pipe, steam flows towards condensing zone, and be condensed into liquid, make liquid be back to evaporating area through capillary structure, because the fluid of heat pipe comes and goes the loop for being arranged in the same passage, steam flow is conflicted in this passage mutually with the flow direction of liquid stream, and hot biography amount is reduced, and not concretive gas remaining in the passage lodges in condensing zone, forms the big zone of the temperature difference, has reduced uniform temperature, heat transfer property thereby also significantly reduction, so therefore creating conditions and keep all being strict with of opposite heat tube significantly improve cost traditionally, price rises, quite do not meet economy, for the article of more realistic demand are provided, the inventor researches and develops, to solve the existing not good problem of heat pipe heat transfer property.

Summary of the invention

Technical problem to be solved by this invention is to provide a kind of flat type loop type heat pipe, in heat pipe, form the structure of multichannel and multiloop formula, with evaporating area, steam channel, condensing zone, fluid return passage is connected into a loop in regular turn, wherein steam channel can be with single passage or setting parallel with one another more than two passages, fluid return passage also can be with single passage or setting parallel with one another more than two passages, just can form the string of single loop formula, the framework of combination in parallel, promptly form more efficient heat-exchange device, the loop mainly is the guide function that utilizes the passage flow resistance, the flow resistance that is steam channel is less than fluid return passage, allow fluid in the loop produce automatically cyclicity and stable folk prescription to and the flowing of equidirectional.Burn the generation of thousand phenomenons,, great hot biography amount can be arranged under the confined space and heat pipe is had hardly so can produce good heat transmitting.The steam flow that forms in the passage (vapor flow) is all along same direction with the liquid stream (liquid flow) of condensation and flows and not conflict mutually.And each loop on the same plane can form inhomogeneous configuration status, to adapt to actual demand.

Another purpose of the present invention is to provide a kind of above-mentioned flat type loop type heat pipe, under the preceding topic that is to consider with economy, can carry out the manufacturing of heat pipe with low cost, but still keep the heat transfer function and the effect of heat pipe, and can produce guiding faster, guiding on utilization asymmetric phenomenon of loop internal channel hot-fluid and the loop structure, make the steam channel in the heat exchange, condensing zone, fluid return passage, evaporating area series loop in regular turn become the passage of circulation shape, can make the interior existing not concretive gas of housing can't fixedly accumulate in the condensing zone of passage, and allow not concretive gas constantly circulate according to design direction along passage, significantly improve the uniform temperature of heat pipe, so even not concretive gas is arranged in the housing of heat pipe, the functional characteristic of opposite heat tube all influences not quite, and can prolong the service life of heat pipe.

Another purpose of the present invention is the flat type loop type heat pipe that provides above-mentioned, can be under same amount of thermal conduction, obtain the structure thinner than prior art, because the present invention can only be made up of housing and passage directing assembly, need not capillary structure, just make heat pipe thickness more thinner than prior art, and the prior art scheme can produce fluid and come and go afoul flowing, its flow resistance is big, nature can form thicker structure, the present invention is that the guiding of isoplanar loop is flowed, thus under identical flow resistance hot plate thickness than prior art scheme book more.

For achieving the above object, structure of the present invention is: comprise a housing and count directing assembly formation number passage and place in the hollow housing, allow directing assembly make and form in the housing and have at least one loop, the loop forms the evaporating area of series connection in regular turn, steam channel, condensing zone, fluid return passage, and in housing, be filled with appropriate amount of fluid, wherein fluid return passage is to each have its independent and not shared mutually passage with steam channel, and can be provided with capillary structure in the dried fluid return passage, and the flow resistance that makes steam channel is less than fluid return passage, when evaporating area is heated, the condensing zone heat radiation, make not conflict mutually of fluids all in loop steady flow all in the same direction, and all fluids all can be flowed through the loop everywhere, so the not concretive gas that exists in the loop is little to the uniform temperature influence in loop, and, and make the loop hot plate become the great heat-exchange device of the good and hot biography amount of uniform temperature along loop flow.Wherein steam channel is for being arranged in parallel more than two passages, and fluid return passage is can the above parallel connection setting of two passages.

Reach technology, means and function and the effect that predetermined purpose is taked for further specifying the present invention, further specify preferable, the feasible embodiment of the present invention below in conjunction with accompanying drawing, believe purpose of the present invention, feature and advantage, can be goed deep into thus and concrete understanding.

Description of drawings

Fig. 1 is the cutaway view of prior art scheme;

Fig. 2 is a three-dimensional exploded view of the present invention;

Fig. 3 is the 3-3 line cutaway view after the present invention's combination among Fig. 2;

Fig. 4 is that a top view of top shell is not had in the present invention among Fig. 2, and shows that liquid flows to schematic diagram in directing assembly.

In Fig. 2,3,4, a kind of flat type loop type heat pipe of the present invention, has a housing 3, housing 3 is the hollow obturator, and is filled with liquid in housing 3, has at least one directing assembly 4, directing assembly 4 is set directly in the housing 3, and make to form in the housing 3 by directing assembly 4 and have at least one loop 2, housing 3 wherein is made up of top shell 31 and drain pan 32, with the periphery of the periphery of top shell 31 and the drain pan 32 airtight formation housing 3 afterwards that joins.

At Fig. 2, among Fig. 3, demonstrate at the top of housing 3 shell 31,4 of drain pan 32 inner faces and directing assemblies are respectively arranged with a tabular capillary structure 7,8, with increase heat pass on Gong can, two boards shape capillary structure 8 wherein can be set, it can be set directly on the inner face of housing 3 respectively, it is capillary structure for a kind of whole formula, as shown in Figure 2, in addition, in Fig. 2, tabular capillary structure 7 is provided with a plurality of fat pipes, this passage is equivalent to the fat pipe of directing assembly 4, similarly also can be located at respectively on the inner face of housing 3, or with the housing person of being made into integration, also can be only wherein arbitrary tabular capillary structure 7 or 8 be set in a side inner face place of housing.

Directing assembly 4 is formation one plate body 40 in Fig. 2, and on plate body 40, offer the passage of several projections or depression, respectively this passage is set to the demand formation of tie loop: in addition, the another kind of pattern of directing assembly 4, for comply with the demand of design with the directing assembly of strip or arcuation, be arranged in the inner face of housing 3, or directly shape by the inner face of housing mode with projection or depression, usually thin housing 3 is fit to form directing assembly 4 with impact style, and can simultaneously each loop once be made, just the form that Figure 2 shows that directing assembly 4 directly can be arranged at housing 3, not limiting to is to be located at top shell or drain pan separately.

In Fig. 2, directing assembly 4 is for being square, but do not exceed with this shape, it also is circle etc., and form each loop user mode of the quartering on the plate body 40, every loop sets is made up of the two adjacent parts that separate bar 40a, b and two edge strip 47, and this is to separating the center breach 48 that forms a via between bar 40a, b.

Separating bar 40a, in two edge strip, 47 spaces surrounded by frame of b and horn shape, first parting bead 41 with four, 42,43,44 are listed in and form four fat pipes therebetween with vertical area parting bead 40a, again with one second parting bead, 45 both sides respectively with first parting bead 44, edge strip 47 is listed in and forms fat pipe therebetween two times, at the horizontal zone parting bead 40b of opposite side and show an end parting bead 46, make and separate into one therebetween than narrow passage, and make end parting bead 46 be connected into the L shape mutually with first parting bead 44, to form by fat pipe, inferior fat pipe, series loop than narrow passage, and forming a recessed limit groove in dual-side, this limit groove is a join domain 49; But above-mentioned structure only is a preferred embodiment.

Wherein form steam channel 22 with fat pipe, to form fluid return passage 24 than narrow passage, breach 48 places are evaporating area 21, and the panel edges place at fat pipe place is a condensing zone 23 in proper order, is filled in liquid in the housing, and it flows to as shown in Figure 4.And fat pipe has partly had function for condensing zone by condensing zone.

Loop 2 is made up of evaporating area 21, steam channel 22, condensing zone 23, the fluid return passage 24 of series connection in regular turn, be filled with an amount of liquid in loop 2, the charging quantity of liquid is meant the capacity of inserting liquid of the 80-90% of the volume that fills up the interior capillary structure of housing and each loop of directing assembly.

Wherein fluid return passage 24 is passages of not sharing mutually with steam channel 22, just steam channel 22 is passages independently, fluid return passage 24 also is a passage independently, and this is the structure that is different from steam channel with the shared same passage of fluid return passage of existing conventional heat pipe.

The zone in loop 2 of the present invention, in Fig. 4, for last, the below respectively forms two groups of loops 2, and above or below a pair of loop for being symmetrical set, the evaporating area 21 in the middle of promptly forming and the condensing zone 23 of periphery, make steam enter four steam channels that fat pipe composed in parallel 22, enter the inferior fat pipe of condensing zone 23 then, the liquid runs down that is condensed into is got back to evaporating area 21 than the formed fluid return passage 24 of narrow passage, just finish do action once, and the shape in loop can the cooperation demand be provided with, be that evaporating area is arranged on the center in Fig. 2, also can be the state of off-centre, or at corner, all can use mode of the present invention, form multiple shape.

And the present invention makes flow resistance in fluid return passage 24 greater than steam channel 22, this is the imbalance that painstakingly causes hot-fluid in the shell channel, to form the dissymmetrical structure that housing 3 inner fluid passages flow, the steam that is formed by evaporating area 21 is easy to and natural stability ground folk prescription to flowing towards condensing zone 23, and in condensing zone 23 condensations formation condensate liquid stream, allow the liquid of condensation flow and not concretive gas, steam flow together with last condensation, the flow resistance in loop not under the same-action with the guiding of channel design under, simultaneously towards fluid return passage 24 stably folk prescription and be back to evaporating area 21 to flowing through fluid return passage 24.

The evaporating area 21 of indication of the present invention is exactly that loop 2 is subjected to thermal site partly, as shown in Figure 3, it can join with an end face (bottom surface) center of a thermal source 5 with housing 3, and thermal source is meant the easy heating surface of electronic building brick, typically refer to central processing unit, but be not limited to this assembly.So, the heat-exchange device of evaporating area and desire heat radiation joins, the heat-exchange device of desire heat radiation can be the heat transfer block of thermal source, the fins group of being heated, heating water sleeve or as the condensing zone in another group loop of the present invention, wherein another organized the serial connection pattern that loop is meant the present invention two loops.

In addition, condensing zone 23 of the present invention is exactly the position of loop heat radiation, this partly is main heat dissipation region, certainly passage itself also is good radiator structure, a condensing zone (or the other end of housing 3 (end face)) and a heat-exchange device 6 are joined, as shown in Figure 3, just a condensing zone and a heat-exchange device as heat radiation join, heat-exchange device be integral type radiator, radiating fin group, cooling tower or as the present invention another organize the evaporating area in loop.

In addition, at the steam channel shown in Fig. 2 22 is a plurality of passages, that is to say and to be provided with steam channel parallel with one another more than one or two 22, so that the flow resistance summation of each steam channel is less than fluid return passage, flow resistance wherein is controlled to be and changes loop total sectional area or total length or its combination, little with the flow resistance in the formation steam channel, the state that flow velocity is big, and the flow resistance in the fluid return passage is big, the state that flow velocity is little, make the hot-fluid that painstakingly forms in the loop asymmetric, impel determining of flow direction: and, fluid return passage 24 is the number passage in the drawings, but also can be provided with fluid return passage parallel with one another more than two, aforesaidly have big flow resistance condition as long as meet, and make condensed fluid return evaporating area, naturally the pilot flow in generation loop through fluid return passage, and the mobile phenomenon of this kind is that stable folk prescription is to flowing, and by what painstakingly limit, only can flow, can not violate arbitrarily flowing of design towards the direction of design.

Or allow and be full of liquid in the fluid return passage to form fluid-tight, it can be done and put (the end expression among the figure of a full capillary structure in the fluid return passage fully, but the tabular capillary structure of similar Fig. 2) to form, also can dwindle gas by the space to reach above-mentioned fluid-tight effect, promptly to increase the asymmetry of flow resistance, the fluid circulation is more stable flows towards design direction and make, but can influence the trafficability characteristic of non-condensing gas this moment because of fluid return passageway, make the uniform temperature of this enforcement relatively poor, can see through degasification program to the loop, to eliminate non-condensing gas, improve uniform temperature.

Owing to be configured to tandem in the loop 2, and sequential folk prescription is to circulating, make the not concretive gas that is present in the loop not gather the space and the time of stop, can only flow or condensate liquid stream flows in the loop along steam flow, so, the present invention can form the liquid and the not concretive gas of liquid stream after gas that the steam channel space contains most steam flow and the few partly condensation in the loop, and, most liquid and few steam flow gas and not concretive gas partly for condensation in the fluid return passage space constitute apace folk prescription to circulating.Interior all fluids of heat pipe are all flowed towards same direction, and conflict mutually, and all fluids can both be by any passage in the system in any time, so heat transfer property is good, hot biography amount is big, and has a narrow range of temperature.

The present invention can be for inserting 1 capillary structure (figure slightly) on fluid return passage 24, its length of capillary structure only reaches in the length of the fluid return passage 24 at condensate liquid stream place, its internal channel is diminished and flow resistance becomes big, or extend to evaporating area separately or extend to condensing zone separately, or extend to evaporating area and condensing zone simultaneously, also more can in whole loop, be provided with capillary structure, but the flow resistance that will meet steam channel is less than fluid return passage.Wherein capillary structure can be pottery, sintered powder, foaming metal, mesh grid, sintering net, channel form plate, fine young bundle or helix.Wherein fluid return passage will be provided with the space and allows steam and not concretive gas pass through.

Form the space of confluxing of evaporating area 21 at center breach 48 places, and each parting bead directly is arranged on the plate body 40, form the outstanding shape in two sides, and condensing zone forms the condensing zone 23a of each short slot shape passage of both sides, front and back on plate body 40, so make condensing zone that the space of evaporation channel second half section is more arranged, and make it when vertical area parting bead 40a does not separate with the side edge of periphery, have the effect of confluxing between two adjacent loops.

So, Fig. 4 for do not establish top shell 31 on look state, and circle is provided with the sign of each zone of action, the centre is a condensation water evaporating area 21, at steam channel 22 inner half passages is the evaporating area of evaporation current, promptly be the evaporation region 21a of broad sense, and in steam channel 22 outer half passages is the steam flow condensing zone, also be combined into the condenser zone 23a of broad sense with former condensing zone, district 26 is respectively returned for condensation water stream and non-condensing air-flow in its both sides, be provided with the passage 27 (as shown in Figure 2) that is communicated with 24 of steam channel 22 and fluid return passages again, but in the broadest sense,, contain the marginal trough such as the groove shape condensing zone 23 of aforesaid passage 27 plates 40 for being provided with a join domain 49, also be that the boundary is between evaporation region 21a and condenser zone 23a, as shown in Figure 4.And directing assembly 4 can be made with powder sintered, makes the person that itself has the capillary structure, also can cooperate aforesaid capillary structure to make it be covered in the both side surface place of directing assembly.

Structure in sum, the present invention uses independently diversion mechanism, and the unequal framework of flow resistance between formation steam channel and fluid return passage, cooperate the hot-fluid imbalance that is produced, the principle of capillarity etc., form in-line order folk prescription to the fluid loop structure, and steam channel and fluid return passage also can the parallel structures of each self-forming multichannel, as long as under the major premise of flow resistance in fluid return passage 24 greater than steam channel 22, just can produce the connection cyclic loop, so, the present invention is in manufacturing process, need also can not operate heat transfer, if the loop is after the degasification program through the program of degasification, then heat conductivity is better, and operating temperature range is wider; So, make the easier composition in loop, on using, reality compares with known heat pipe, the speed that its heat-conducting flow moves is faster than known heat pipe, hot uniform temperature height, heat transmitting is good, and then hot biography amount is greater and faster, so the present invention does not need the degasification processing procedure, and the clean process of cleaning is also inessential, make its processing procedure simple, then cost is low, and price also can reduce, has better economy, and functional characteristic is better, so the present invention can provide good usability, the present invention and known heat pipe are diverse mechanism.

The above is the detailed description of preferred embodiment of the present invention and graphic, be not to be used for limiting the present invention, all scopes of the present invention should be awkward with following claim, and the embodiment and the approximate construction of the spirit variation similar with it of all claims all should be contained among the present invention.

Claims

1. flat type loop type heat pipe is characterized in that: comprising:

One housing, it is the hollow obturator, and is filled with liquid in it; And

At least one directing assembly, it is to be arranged in the housing, and with directing assembly by forming the loop in the housing, the loop is made up of evaporating area, steam channel, condensing zone and fluid return passage series connection in regular turn, wherein fluid return passage and steam channel are to be provided with separately independently passage, and make flow resistance in fluid return passage greater than steam channel, make the loop form asymmetric guiding effect;

Be subjected to the steam flow of thermosetting by evaporating area when liquid, flow to the liquid stream that condensing zone forms condensation, allow the liquid of condensation flow, with the not concretive gas that is had in the housing loop, together with the part steam flow of last condensation, under the asymmetric guiding of loop hot-fluid, simultaneously towards fluid return passage with single equidirectional flow, and be back to evaporating area, and flow into evaporation channel again, form circulating of loop.

2. flat type loop type heat pipe as claimed in claim 1 is characterized in that described housing is set for the eccentric with respect to the evaporating area in loop.

3. flat type loop type heat pipe as claimed in claim 1 is characterized in that described housing joins for an evaporating area and a thermal source with an end face, and a housing other end and a heat-exchange device join, to carry out heat exchange and heat radiation.

4. flat type loop type heat pipe as claimed in claim 1 is characterized in that the charging quantity of liquid in the described housing, is meant the capacity of inserting liquid of 80-90% of the volume in the capillary structure that fills up in the housing and each loop of directing assembly.

5. flat type loop type heat pipe as claimed in claim 1 it is characterized in that described directing assembly is to form to count parting bead, and each parting bead is made into integration for the inner surface with housing.

6. flat type loop type heat pipe as claimed in claim 1, it is characterized in that described directing assembly is directly to be made into integration, the passage in each loop be on directing assembly with projection or be recessed to form, wherein between steam channel and fluid return passage the passage that is connected is arranged.

7. flat type loop type heat pipe as claimed in claim 6 is characterized in that described directing assembly is to be made into integration with the material with capillary.

8. flat type loop type heat pipe as claimed in claim 7 is characterized in that described capillary material is pottery, sintered powder or foaming metal.

9. flat type loop type heat pipe as claimed in claim 1 is characterized in that described directing assembly forms a recessed limit groove at least one side.

10. flat type loop type heat pipe as claimed in claim 1 is characterized in that described directing assembly has a center breach, and becomes the evaporating area in each loop with the center breach.

11. flat type loop type heat pipe as claimed in claim 1 is characterized in that on the surface, loop of described directing assembly one capillary structure being set all, returns evaporating area in order to liquid, but the flow resistance of fluid return passage still needs greater than vapor passageway.

12. flat type loop type heat pipe as claimed in claim 1, the steam channel that it is characterized in that described directing assembly is with setting parallel with one another more than two passages.

13. flat type loop type heat pipe as claimed in claim 1 is characterized in that the described capillary structure that is provided with the bigger flow resistance of formation, and guides condensed fluid simultaneously and return evaporating area in the fluid return passage of directing assembly.

14. flat type loop type heat pipe as claimed in claim 13, it is characterized in that described capillary structure extends to evaporating area and/or condensing zone, capillary structure is pottery, sintered powder, foaming metal, mesh grid, sintering net, channel form plate, fibre bundle or helix.

15. flat type loop type heat pipe as claimed in claim 1 is characterized in that the flow resistance of the fluid return passage of described directing assembly is to instigate that the passage section of fluid return passage is long-pending to be reduced or passage length is increased or its combination greater than steam channel.

16. flat type loop type heat pipe as claimed in claim 1, the fluid return passage that it is characterized in that described directing assembly are to form fluid-tight with liquid.

17. flat type loop type heat pipe as claimed in claim 1, the fluid return passage that it is characterized in that described directing assembly is with setting parallel with one another more than two passages.

18. flat type loop type heat pipe as claimed in claim 1 is characterized in that also being provided with at least one tabular capillary structure, it is to be located between at least one inner face and directing assembly of housing, to increase the heat energy of passing on Gong.

19. flat type loop type heat pipe as claimed in claim 18 is characterized in that described tabular capillary structure is for directly to be arranged on the inner face of housing.

20. flat type loop type heat pipe as claimed in claim 18 is characterized in that described tabular capillary structure is provided with passage.