CN206210777U - Ultra-thin phase-change heat piece - Google Patents
Ultra-thin phase-change heat piece Download PDFInfo
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- CN206210777U CN206210777U CN201621268088.6U CN201621268088U CN206210777U CN 206210777 U CN206210777 U CN 206210777U CN 201621268088 U CN201621268088 U CN 201621268088U CN 206210777 U CN206210777 U CN 206210777U
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Abstract
The utility model discloses a kind of ultra-thin phase-change heat piece, the fin includes the ultra-thin shell with closed cavity, sticks in the liquid-sucking core of the ultra-thin shell internal layer and the normal temperature heat-pipe working medium of the solid-state for being arranged at the closed cavity.What ultra-thin phase-change heat piece of the present utility model was filled in ultra-thin shell is the normal temperature heat-pipe working medium of solid-state, when fin is when thermal source is contacted, volume increase when working medium undergoes phase transition, fin internal pressure increases, so that the relatively low shell of rigidity is even closer with thermal source interracial contact, substantially reduce the thermal contact resistance of thermal source and fin so that heat can more effectively spread out of from thermal source, fin heat power is high；Ultra-thin phase-change heat piece integral thickness of the present utility model is only 0.1 0.4mm, has the advantages that thickness of thin, disclosure satisfy that the increasingly lightening requirement of electronic equipment, and flake design contributes to the homogeneity of heat transfer surface temperature so that heat-transfer effect is more preferably.
Description
Technical field
The utility model belongs to ultra-thin radiating fin and flat hot pipe technical field, more particularly to a kind of ultra-thin phase-change heat
Piece.
Background technology
With developing rapidly for electronic technology, development of electronic devices trend to high frequency, high speed and small-sized light thinning side
To development, the caloric value for so resulting in unit volume appliance device is sharply increased, and will have a strong impact on the stability of electronic chip
And the life-span, the heat dissipation problem of small light and thin electronic product becomes the fast-developing bottleneck of restriction electron trade.
Metal fin, graphite heat radiation fin and flat hot pipe are mostly used in existing technology, although metal fin
Thermal conductivity factor itself is high, but interfacial property is very poor, can not be fitted well when being contacted with thermal source, there is very big thermal resistance, no
Heat can be delivered to metal conducting strip from thermal source well, so as to influence overall heat dispersion.And graphite heat radiation fin is vertical
To thermal conductivity factor it is very low, and its interfacial property is also very poor, heat can not be passed from thermal source well.Flat heat
Although pipe has good heat conductivility, its preparation technology limits its thickness, and processing preparation cost is high, causes heat
Pipe can not meet the radiating requirements of increasingly lightening electronic product.
So a kind of ultra-thin, thermal conductivity factor of urgent need invention is good and small with thermal source thermal contact resistance, processing preparation cost is low to be dissipated
Backing meets the heat dissipation problem of current lightening electronic product.
Utility model content
Based on this, in order to overcome the defect of above-mentioned prior art, the utility model provides a kind of ultra-thin phase-change heat piece,
The fin thickness is thin, heat conductivility is excellent, pliability is good and thermal resistance is small.
In order to realize above-mentioned utility model purpose, the utility model takes following technical scheme：
A kind of ultra-thin phase-change heat piece, the fin includes the ultra-thin shell with closed cavity, sticks in described surpassing
The liquid-sucking core of thin outer crust internal layer and be arranged at the closed cavity solid-state normal temperature heat-pipe working medium.
Wherein in some embodiments, the ultra-thin shell with closed cavity be by thickness for 0.01-0.1mm two
Piece metal foil or non-metal plate welding or bond.
Wherein in some embodiments, the liquid-sucking core is the material for having certain porosity, such as wire netting or non-woven fabrics
Nonmetallic materials, thickness is 0.01-0.1mm.
Wherein in some embodiments, the normal temperature heat-pipe working medium is good with described ultra-thin sheathing material compatibility；Institute
Normal temperature heat-pipe working medium is stated for ultra-pure water, ethanol or acetone.
Wherein in some embodiments, the thickness of the fin is 0.1-0.4mm.
Compared with prior art, the utility model has the advantages that：
1st, what ultra-thin phase-change heat piece of the present utility model was filled in ultra-thin shell is the normal temperature heat-pipe working medium of solid-state, when
When thermal source is contacted, volume increases fin when working medium undergoes phase transition (phase transformation between liquid and gaseous state), fin internal pressure
Increase so that the relatively low shell of rigidity is even closer with thermal source interracial contact, substantially reduce contact heat of the thermal source with fin
Resistance so that heat can more effectively spread out of from thermal source, and fin heat power is high；
2nd, ultra-thin phase-change heat piece of the present utility model is only 0.01-0.1mm with flexible shell using thickness
Material, prepares the laminar phase-change heat piece of integral thickness only 0.1-0.4mm, has the advantages that thickness of thin, Neng Gouman
The increasingly lightening requirement of sufficient electronic equipment, flake design contributes to the homogeneity of heat transfer surface temperature so that heat-transfer effect is more
It is good.
Brief description of the drawings
Fig. 1 is the transversary schematic diagram of a kind of ultra-thin phase-change heat piece of the utility model embodiment 1；
Fig. 2 is the operation principle schematic diagram of a kind of ultra-thin phase-change heat piece of the utility model embodiment 1；
Reference：1 --- shell, 2 --- liquid-sucking core, 3 --- solid-state phase changes working medium, 4 --- ultra-thin phase-change heat piece,
5 --- thermal source, 6 --- electronic equipment casing, 7 --- working medium circulation line maps.
Specific embodiment
The utility model is further discussed below with specific embodiment below in conjunction with the accompanying drawings, the utility model is not addressed part and is applicable
In prior art.Specific embodiment of the utility model, but embodiment is given below merely to being described in further detail this theory
It is bright, it is not intended to limit claim of the present utility model.
The ultra-thin phase-change heat piece of embodiment 1
Fig. 1 is referred to, is a kind of ultra-thin phase-change heat piece 4 of the present embodiment, the ultra-thin phase-change heat piece 4 of the present embodiment is wrapped
The ultra-thin shell 1 with closed cavity is included, the liquid-sucking core 2 of the ultra-thin shell internal layer is sticked in and is arranged at described closed
The normal temperature heat-pipe working medium 3 of cavity.
In this embodiment, the material of ultra-thin shell 1 is the thick Copper Foils of 0.05mm, and ultra-thin shell 1 is welded by two panels Copper Foil
Form, liquid-sucking core 2 is the thick thin matter copper mesh with certain porosity of 0.05mm, normal temperature heat-pipe working medium 3 is simultaneous with ultra-thin shell 1
The deionized water of the good curdled appearance of capacitive, the integral thickness of ultra-thin phase-change heat piece 4 is 0.3mm.
Fig. 2 is referred to, is a kind of operation principle schematic diagram of ultra-thin phase-change heat piece, when thermal source 5 gives off heat, by heat
Be delivered to the ultra-thin shell 1 of ultra-thin phase-change heat piece, ultra-thin shell 1 heats up and melts the normal temperature heat-pipe working medium 3 of solid-state, temperature after
Height of continuing rising, liquid evaporation after the steam of heat runs into temperature relatively low shell, is condensed into liquid, in liquid-sucking core 2 into gas
Middle liquid flows back to evaporation ends due to capillarity, so circulation, continuously takes the heat of thermal source to electronic equipment casing
6, then dissipate.And the ultra-thin phase-change heat piece of the present embodiment is during solid melts and vaporizes, fin internal pressure
Increase so that the relatively low shell of rigidity contacts even closer with thermal source, reduces the thermal contact resistance of thermal source and fin so that should
The characteristics of ultra-thin phase-change heat piece has thickness of thin, heat power is high.
The preparation method of the ultra-thin phase-change heat piece of the present embodiment, comprises the following steps：
Step one, by thickness for the sheathing material Copper Foil and thickness of 0.05mm are the liquid-sucking core material copper mesh cutting of 0.05mm
Into certain corresponding size, then cleaned to sheet surface without oil stain, stain；Then sheet material is dried or is dried；Wherein
Cleaning step is：Ultrasonic wave is cleaned, chemical reagent cleaning, clear water cleaning, and the road matting cleaning of deionized water cleaning four is passed through again
Cold cleaning by degreasing 10 minutes, thermal debinding is cleaned 10 minutes, and cleaning agent is cleaned 2 minutes；
Step 2, liquid-sucking core is closely cohered with shell fine sheet by pressurization；
Step 3, one end that step 2 is adhesive with the two panels shell fine sheet of liquid-sucking core is welded, and the other end has
Opening；
Step 4, the deionized water of solid-state is inserted in the opening of step 3；
Step 5, vacuumize process, the pumpdown time is 50 seconds；
Step 6, welded seal is carried out to the other end, that is, obtain ultra-thin phase-change heat piece.
The ultra-thin phase-change heat piece of embodiment 2
The ultra-thin phase-change heat piece of the present embodiment, the material of ultra-thin shell 1 is 0.1mm thick Copper Foil, and ultra-thin shell is by two
Piece Copper Foil is welded, and liquid-sucking core is the thick thin matter copper mesh with certain porosity of 0.1mm, normal temperature heat-pipe working medium be with it is ultra-thin
The deionized water of the good curdled appearance of shell compatibility, the integral thickness of ultra-thin phase-change heat piece is 0.4mm.The present embodiment
The preparation method of ultra-thin phase-change heat piece is same as Example 1.
The ultra-thin phase-change heat piece of embodiment 3
The ultra-thin phase-change heat piece of the present embodiment, the material of ultra-thin shell 1 is 0.1mm thick graphite non-metal plate, ultra-thin
Shell is welded by two panels graphite non-metal plate, and liquid-sucking core is the thick non-woven fabrics with certain porosity of 0.1mm, normal temperature heat
Plumber's matter is the acetone of the curdled appearance good with ultra-thin shell compatibility, and the integral thickness of ultra-thin phase-change heat piece is 0.4mm.
The preparation method of the ultra-thin phase-change heat piece of the present embodiment is same as Example 1.
The ultra-thin phase-change heat piece of embodiment 4
The ultra-thin phase-change heat piece of the present embodiment is the solidification good with ultra-thin shell compatibility except normal temperature heat-pipe working medium
Outside the ethanol of state, other materials is same as Example 1.The preparation method of the ultra-thin phase-change heat piece of the present embodiment and implementation
Example 1 is identical.
The radiating effect of test example 1 is contrasted
The ultra-thin phase-change heat piece of common flat hot pipe and the utility model embodiment 1 to prior art is carried out simultaneously
Heat conduction and heat radiation is tested, and when heat dissipation capacity is 5W, the radiating temperature difference at ordinary flat heat pipe two ends is basic at 5 DEG C or so, and embodiment 1
The ultra-thin phase-change heat piece radiating temperature difference can reach 3-4 DEG C, and heat-conducting effect increases, so that good heat dissipation effect.
The processing characteristics of test example 2 is contrasted
Although the common flat hot pipe radiating effect of prior art is preferably, processing technology is complicated, long processing time,
High cost.General flat hot pipe processing percent defective is up to 80%, and process time long flow path was up to 3 days.And the utility model is implemented
The ultra-thin phase-change heat machining process of example 1 is simple, and general percent defective only has 20%-30%, and a piece of ultra-thin radiating fin integrally adds
Work flow time only has several hours.Work flow shortens, and yield rate is improved, and cost is substantially reduced.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope of this specification record is all considered to be.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (5)
1. a kind of ultra-thin phase-change heat piece, it is characterised in that the fin includes the ultra-thin shell with closed cavity, pastes
In the liquid-sucking core and the normal temperature heat-pipe working medium of the solid-state for being arranged at the closed cavity of the ultra-thin shell internal layer.
2. ultra-thin phase-change heat piece according to claim 1, it is characterised in that the ultra-thin shell with closed cavity
It is for the two panels metal foil or non-metal plate of 0.01-0.1mm are welded or are bonded by thickness.
3. ultra-thin phase-change heat piece according to claim 1, it is characterised in that the liquid-sucking core is that thickness is 0.01-
The wire netting or non-woven fabrics of 0.1mm.
4. ultra-thin phase-change heat piece according to claim 1, it is characterised in that the normal temperature heat-pipe working medium be ultra-pure water,
Ethanol or acetone.
5. the ultra-thin phase-change heat piece according to any one of Claims 1 to 4, it is characterised in that the thickness of the fin
It is 0.1-0.4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621268088.6U CN206210777U (en) | 2016-11-23 | 2016-11-23 | Ultra-thin phase-change heat piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621268088.6U CN206210777U (en) | 2016-11-23 | 2016-11-23 | Ultra-thin phase-change heat piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206210777U true CN206210777U (en) | 2017-05-31 |
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ID=58746934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621268088.6U Active CN206210777U (en) | 2016-11-23 | 2016-11-23 | Ultra-thin phase-change heat piece |
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| CN (1) | CN206210777U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356346A (en) * | 2016-11-23 | 2017-01-25 | 广东合新材料研究院有限公司 | Ultra-thin phase change cooling fin and production method thereof |
| CN115209691A (en) * | 2022-06-16 | 2022-10-18 | 南京艾科美热能科技有限公司 | Phase change heat storage fin and self-adaptive flexible radiating fin |
-
2016
- 2016-11-23 CN CN201621268088.6U patent/CN206210777U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356346A (en) * | 2016-11-23 | 2017-01-25 | 广东合新材料研究院有限公司 | Ultra-thin phase change cooling fin and production method thereof |
| CN115209691A (en) * | 2022-06-16 | 2022-10-18 | 南京艾科美热能科技有限公司 | Phase change heat storage fin and self-adaptive flexible radiating fin |
| CN115209691B (en) * | 2022-06-16 | 2023-09-05 | 南京艾科美热能科技有限公司 | Phase-change heat storage sheet and self-adaptive flexible radiating fin |
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