CN206165061U - A Phase Change Heat Dissipation System with Porous Internal Fins - Google Patents
A Phase Change Heat Dissipation System with Porous Internal Fins Download PDFInfo
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- CN206165061U CN206165061U CN201621069636.2U CN201621069636U CN206165061U CN 206165061 U CN206165061 U CN 206165061U CN 201621069636 U CN201621069636 U CN 201621069636U CN 206165061 U CN206165061 U CN 206165061U
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- evaporator
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- natural convection
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Abstract
本实用新型公开了一种带多孔内肋片的相变散热系统，包括蒸发器、自然对流式冷凝器、蒸汽管路和回流管路，所述蒸发器设有长方体的真空腔体，蒸发器的一面为受热面，受热面的外侧与发热体连接，受热面的内侧与若干个蒸发肋片连接，在蒸发肋片的两侧均设有泡沫金属铜；所述自然对流式冷凝器设有密封腔体，在密封腔体的两侧均设有用于散热的肋片群；所述蒸发器的顶部通过蒸汽管路与自然对流式冷凝器的顶部连通，自然对流式冷凝器的底部通过回流管路与蒸发器的底部连通。本实用新型的带多孔内肋片的相变散热系统，通过将吸热和散热分布在不同区域，可以大大的减小装置的空间要求，利用带多空肋片进行蒸发吸热，吸热效果好，从而散热效果好。
The utility model discloses a phase change heat dissipation system with porous inner fins, which comprises an evaporator, a natural convection condenser, a steam pipeline and a return pipeline. The evaporator is provided with a cuboid vacuum cavity, and the evaporator One side of the heating surface is the heating surface, the outer side of the heating surface is connected with the heating body, the inner side of the heating surface is connected with several evaporating fins, and foam metal copper is arranged on both sides of the evaporating fins; the natural convection condenser is equipped with The sealed cavity is provided with fin groups for heat dissipation on both sides of the sealed cavity; the top of the evaporator communicates with the top of the natural convection condenser through a steam pipeline, and the bottom of the natural convection condenser is connected by a reflux The pipeline communicates with the bottom of the evaporator. The phase-change heat dissipation system with porous inner fins of the utility model can greatly reduce the space requirement of the device by distributing heat absorption and heat dissipation in different areas, and utilizes the multi-hole fins to conduct evaporation and heat absorption, and the heat absorption effect Good, so that the heat dissipation effect is good.
Description
Technical field
The present invention relates to a kind of phase-change radiation system with porous inner rib plate, belongs to field of radiating.
Background technology
The heat dissipation problem of electronic devices and components has become the key difficulties of Current electronic components and parts and electronic equipment manufacturing.It is near
Nian Lai, the fast development of electronic technology.The intensive and miniaturization of the high frequency, high speed and integrated circuit of electronic device so that single
The overall power density and caloric value of position volume electronic device increases by a wide margin, so that the cooling problem of electronic device becomes to get over
More to project.Such as:The chip heat flow of mainframe computer has reached 60W/cm2, by 2000 100W/cm was had been over2,
At present highest has reached 200W/cm2.Especially because MEMS (Micro Electro-Mechanical System) technology is prominent
Fly to push ahead vigorously so that the size of electronic devices and components is less and less, has entered into sub-micrometer scale from micron dimension.For hot-fluid
The higher application scenario of density, such as notebook computer etc., the heat pipe type of cooling is widely applied.The research of heat pipe is in mistake
Go to obtain within 30 years great progress, 2007 or so, Tang great Wei, Zhao Yaohua of the Chinese Academy of Sciences etc. proposed microflute group's Phase cooling
System, and the fields such as laser cooling, LED radiatings are successfully applied to, and it is as follows to propose Patents：
China Patent No. [200510098733.4], open (bulletin) day 2007.03.14, Hu Xuegong and Zhao Yaohua is proposed
Microflute group's phase-change heat exchange system, this is actually a kind of separate heat pipe, mainly opens up flat on the evaporating surface of thermal source
Liquid refrigerant is pumped to heat affected zone by capable microflute group, the capillary force produced using microflute, by thin liquid film evaporative effect, is reached
To the efficiency of high intensity cooling；Then radiated into atmospheric environment by free convection condenser.
China Patent No. [200810057185.4], open (bulletin) day 2009.08.05, Hu Xuegong and Xiao send Lian Dengti
The microflute group's phase-change heat exchange system with inner rib plate is gone out, mainly on the basis of patent [200510098733.4], near heat
The evaporating surface in source lays inner rib plate, and parallel microflute group is processed on each inner rib plate, which adds thin liquid film evaporation
Area, further increases the cooling performance of evaporimeter.
From in terms of above-mentioned existing patent, the deficiency being primarily present is as follows：Parallel microflute group is processed on copper material, is guarantee
Machining accuracy, mainly using wire cutting or CNC engraving machines, processing cost is high.And by arranging the inner rib plate side with microflute
Method improves thin liquid film disengagement area, and the raising of this mode heat exchanging area is still limited after all.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention to propose a kind of phase with porous inner rib plate
Become cooling system, by the way that heat absorption and radiating are distributed in into zones of different, can greatly reduce the space requirement of device, using band
Many sky fins are evaporated heat absorption, and endothermic effect is good, so as to good heat dissipation effect.
Technical scheme：To solve above-mentioned technical problem, the phase-change radiation system with porous inner rib plate of the present invention, including steaming
Device, natural convection condenser, steam pipework and return line are sent out, the evaporimeter is provided with the vacuum cavity of cuboid, vacuum
Evaporable liquid working substance is provided with cavity, the one side of evaporimeter is heating surface, and the outside of heating surface is connected with heater, is heated
The inner side in face is connected with several evaporation fins, and evaporation fin is OBL laminated structure, equal in the both sides of evaporation fin
It is provided with foam metal copper；The natural convection condenser is provided with seal cavity, and seal cavity is made up of the good metal of heat conduction,
The both sides of seal cavity are equipped with the fin group for radiating；The top of the evaporimeter is by steam pipework and natural convection
The top connection of condenser, the bottom of natural convection condenser is connected by return line with the bottom of evaporimeter, in backflow
Pipeline is provided with and vacuumizes filling interface；Liquid working substance evaporation endothermic is become steam by evaporimeter by evaporating fin, and steam leads to
Cross steam pipework steam is sent in natural convection condenser, condensed water heat release is become by steam, heat is passed through into rib
Piece group is dispersed in air.
Preferably, the porosity ranges of the foam metal copper are 60%-90%, hole density scope takes 60PPI-
200PPI。
Preferably, the steam pipework is made up of copper pipe or other metal tubes compatible with working medium, caliber is 6-10mm；
The return line is also made up of copper pipe or other metal tubes compatible with working medium.
Preferably, the caliber of the return line is big compared with the caliber of steam pipework.
Preferably, the liquid working substance is deionized water, ethanol or the freon of degasification, liquid working substance in evaporimeter
Highly less than the lower edge of heater, higher than the lower edge of evaporation fin.
In the present invention, the evaporimeter be rectangular structure, material selection red copper.Can be by five pieces of copper plates and band porous
The copper plate of inner rib plate group is spliced into cuboid, and the welding forming equally in vacuum brazing furnace, the melt temperature of selected solder is low
In aforementioned copper powder sintering temperature, the outer surface of the evaporimeter is heating surface, is connected with heater.The condenser, thin
The cavity external welding fin that copper plate is welded, using Natural Heat Convection mode, the heat that condensing heat-exchange discharges is scattered and disappeared
To in extraneous natural environment.Forced air cooling mode is may also be employed, more easy method can be radiated using fin-tube type or plate-fin
Device；Water-cooling pattern is such as adopted, plate type heat exchanger, steam working medium and extraneous cooling water heat exchange is can select, is changed into liquid refrigerant.
In the present invention, the evaporimeter is welded with porous inner rib plate group in the side near heating face, using in porous
The capillary force that fin micropore produces, by base of evaporator liquid working substance the porous region of near heating sources is drawn into, and liquid refrigerant is received
Hot explosive evaporation becomes steam, and steam is entered in air-cooled or water-cooled condenser by steam pipework, and steam condensation wherein is put
Again it is changed into liquid refrigerant after heat, heat is then scattered to ambient atmosphere environment (air-cooled) or cooled water is taken away.And in condenser
Liquid refrigerant is then come back in evaporimeter in the presence of geo-potential difference by return line, and circulation is carried out.The phase-change heat
System has the advantages that heat dispersion height, flexible arrangement.
Beneficial effect：The phase-change radiation system with porous inner rib plate of the present invention, porous inner rib plate group is mounted directly on
On the evaporimeter wall of near heating sources, when system works, the capillary force produced using porous material micropore, by base of evaporator
Liquid refrigerant be continually pumped near thermal source area, working medium is changed into steam after being heated by thin liquid film boiling process, then
Heat is discharged into surrounding environment within the condenser.According to the research of recent domestic, minute yardstick system often has super
Normal augmentation of heat transfer behavior, when feed flow liquid level is less than porous material thickness, occurs in the intrapore boiling mode of porous, no longer
It is pool boiling mechanism, but thin liquid film boiling mechanism, the thin liquid film boiling of micron order of magnitude thickness, more common pool boiling biography
Hot coefficient is higher by an order of magnitude, and this is a kind of extraordinary minute yardstick boiling phenomenon.Compared to traditional microflute group structure, this
The carrier that bright application porous foam copper seethes with excitement as thin liquid film, can not only provide bigger capillary power (by the tune in aperture
It is whole), and greatly improve the heat exchange area of heat affected zone.In addition, system cost of manufacture is relatively low.So as to be better than in terms of cost performance
Traditional microflute group's phase-change radiation system.System is by local cooling element (evaporimeter), heat and fluid transport pipeline, long-range
The combination of heat dissipation element (condenser) three, can by the caloric value produced by the small power device of size in narrow space and
When be discharged in external environment condition, such that it is able to significantly save the functional space of electronic electric equipment system, realize whole
Long-range, quiet, idle, high intensity the cooling purpose of individual cooling system.
Description of the drawings
Fig. 1 is the system schematic of the present invention.
Fig. 2 is the structural representation of foam copper fin.
Fig. 3 is the foam copper fin graphite jig design diagram in evaporimeter of the present invention.
Fig. 4 is the structural representation of natural convection condenser.
Fig. 5 is the schematic diagram of evaporimeter of the present invention.
Specific embodiment
The present invention is further described below in conjunction with the accompanying drawings.
As shown in Figures 1 to 5, it is the phase-change radiation system with porous inner rib plate of the invention, including evaporimeter 9, naturally right
Flow condenser 4, steam pipework 11 and return line 6, the evaporimeter 9 is provided with the vacuum cavity of cuboid, and vacuum cavity sets
There are steam (vapor) outlet 3 and liquid refluxing opening 8, evaporable liquid working substance is provided with vacuum cavity, liquid working substance is preferably anhydrous second
Alcohol or distilled water, with the higher latent heat of vaporization, the one side of evaporimeter 9 is heating surface, and outside and the heater 1 of heating surface connect
Connect, the preferred nickel chromium triangle piece electric heating material of heater 1 is made, the outer surface of heater 1 is tight with heating surface by heat conductive silica gel (silicone grease)
Stick together, the inner side of heating surface is connected with several evaporation fins 2, and evaporation fin 2 is OBL laminated structure, is evaporated
Between 1-100mm, between 0.4-30mm, the spacing for evaporating fin 2 is 0.5--- to thickness to the height and width of fin 2
Between 30mm, in the both sides of evaporation fin 2 foam metal copper is equipped with；The natural convection condenser 4 is provided with seal cavity,
Seal cavity is provided with steam inlet 7 and liquid outlet 5, and seal cavity is made up of the good metal of heat conduction, such as metallic aluminium or copper,
The both sides of seal cavity are equipped with the fin group 10 for radiating, and steam pipework 11 is connected with steam inlet 7 and steam (vapor) outlet 3,
Return line 6 is connected with liquid outlet 5 and liquid refluxing opening 8；The top of the evaporimeter 9 by steam pipework 11 with it is naturally right
The top connection of flow condenser 4, the bottom of natural convection condenser 4 is connected by return line with the bottom of evaporimeter 9；
Liquid working substance evaporation endothermic is become steam by evaporimeter 9 by evaporating fin 2, and steam is sent to steam by steam pipework 11
In natural convection condenser 4, condensed water heat release is become by steam, heat is dispersed in air by fin group 10.
In the present invention, the porosity ranges of the foam metal copper are 60%-90%, and hole density scope takes 60PPI-
200PPI.The steam pipework 11 is made up of copper pipe or other metal tubes compatible with working medium, and caliber is 6-10mm；The backflow
Pipeline 6 is also made up of copper pipe or other metal tubes compatible with working medium, the pipe of the caliber of the return line 6 compared with steam pipework 11
Footpath is big.The liquid working substance is deionized water, ethanol or the freon of degasification, and the height of liquid working substance is less than and sends out in evaporimeter 9
The lower edge of hot body 1, higher than the lower edge of evaporation fin.
A kind of preparation method of the above-mentioned phase-change radiation system with porous inner rib plate, comprises the following steps：
(1) 2 groups of sintering circuits of porous fin：Using the graphite jig of design processing, copper powder is inserted into copper plate lower section,
Integral forming after sintering in sintering furnace, sintering temperature is 950 degree or so, and sintering process is processed using hydrogen reducing, such as Fig. 3 institutes
Show；
(2) matting：The sheet material of evaporimeter 9, the sheet material of condenser 4 and associated pipe are cleaned, initially with second
The oil removing in ultrasonic cleaning equipment of alcohol or trichloro ethylene, is then rinsed with clear water, then using the constant temperature of finite concentration one
The alkali lye of degree removes oxide layer in ultrasonic wave cleaning dress, is rinsed using 60～80 DEG C of hot water immediately after base extraction；
(3) evaporimeter 9 and the welding sequence of condenser 4：Using using high temperature vacuum brazing method, melt temperature 700 is selected
～800 DEG C of silver-bearing copper weld tabs, its melt temperature welds in evaporimeter 9 and condenser 4 less than the sintering temperature of porous fin 2 groups
Shaping；
(4) steam pipework 11, return line 6 and filler line welding sequence：Using high-frequency induction welder or high-temperature vacuum pricker
Soldering method, selects the silver-bearing copper weld tabs of 600～700 DEG C of melt temperature, by steam pipework 11, return line 6, filler line and evaporimeter
9th, condenser 4 is engaged, and filling pipeline is placed on steam pipework 11 or return line 6, as shown in Figure 1；
(5) working medium preparation section：First heat the method for condensing afterwards and process is de-gassed to water, then the pure place of deionization
Reason；
(6) fill working medium and vacuumize operation：Vacuum needed for being extracted using diffusion pump, when vacuum reaches 10-3～10-2During Pa, working medium filling is carried out, the charging amount of working medium should ensure that lower section of the liquid level of evaporimeter 9 in thermal source area；
(7) sealing operation：When the vacuum of evaporimeter 9 reaches requirement, immediately filler line is sealed using high-frequency induction welder
Weldering, completes the Making programme of evaporimeter 9；
(8) vacuum leak hunting operation：High true hole leak detection is carried out to whole device using helium mass spectrometer leak detector.
When in use, the natural convection condenser 4 is vertically placed on the outer of electric cabinet or rack to the present invention
Portion, or be embedded in cabinet or rack wall.Steam mainly in the rectangle seal cavity of natural convection condenser 4 on
Wall condensation heat, in the presence of surface tension, condensation water then flow to natural convection condensation along wall is top-down
The bottom of device 4, the bottom of natural convection condenser 4 is disposed with to the rapid slope for collecting condensation water, it is possible to use gravity
Effect collect condensation water rapidly.The heat that steam condensation is discharged is transmitted to nature pair by the inwall of natural convection condenser 4
On the fin group 10 of the outer wall of flow condenser 4, finally it is lost in external environment by the heat transfer free convection of air.Pass through
Evaporation endothermic and condensation radiating are distributed in into different regions, in narrow and small cooling electronic component region, only evaporimeter 9 steams
Heat absorption is sent out, becomes steam, take away substantial amounts of heat, self-heating heat loss through convection is carried out by fin group 10 in external environment condition, radiated
Effect is good, so, that is, realizes the purpose lowered the temperature in small space, has reached again and has realized the mesh of radiating very well in another region
, realize that whole cooling system is long-range, quiet, idle, high intensity cooling purpose.
The above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621069636.2U CN206165061U (en) | 2016-09-21 | 2016-09-21 | A Phase Change Heat Dissipation System with Porous Internal Fins |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621069636.2U CN206165061U (en) | 2016-09-21 | 2016-09-21 | A Phase Change Heat Dissipation System with Porous Internal Fins |
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| CN201621069636.2U Expired - Fee Related CN206165061U (en) | 2016-09-21 | 2016-09-21 | A Phase Change Heat Dissipation System with Porous Internal Fins |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106211726A (en) * | 2016-09-21 | 2016-12-07 | 江苏科技大学 | The phase-change radiation system of a kind of band porous inner rib plate and preparation method |
| CN108377634A (en) * | 2018-04-25 | 2018-08-07 | 四川大学 | Cooling system and method based on phase-change thermal energy conversion |
| CN109862756A (en) * | 2019-03-11 | 2019-06-07 | 北京航空航天大学 | Low-altitude emergency active thermal control system and method based on porous material evaporative cooling device |
| JP2021042920A (en) * | 2019-09-12 | 2021-03-18 | 中村製作所株式会社 | Heat exchanger |
-
2016
- 2016-09-21 CN CN201621069636.2U patent/CN206165061U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106211726A (en) * | 2016-09-21 | 2016-12-07 | 江苏科技大学 | The phase-change radiation system of a kind of band porous inner rib plate and preparation method |
| CN108377634A (en) * | 2018-04-25 | 2018-08-07 | 四川大学 | Cooling system and method based on phase-change thermal energy conversion |
| CN109862756A (en) * | 2019-03-11 | 2019-06-07 | 北京航空航天大学 | Low-altitude emergency active thermal control system and method based on porous material evaporative cooling device |
| JP2021042920A (en) * | 2019-09-12 | 2021-03-18 | 中村製作所株式会社 | Heat exchanger |
| JP7350300B2 (en) | 2019-09-12 | 2023-09-26 | ナカムラマジック株式会社 | Heat exchanger |
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Granted publication date: 20170510 Termination date: 20190921 |