CN208240661U - Micro capillary groove evaporator - Google Patents
Micro capillary groove evaporator Download PDFInfo
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- CN208240661U CN208240661U CN201820248611.1U CN201820248611U CN208240661U CN 208240661 U CN208240661 U CN 208240661U CN 201820248611 U CN201820248611 U CN 201820248611U CN 208240661 U CN208240661 U CN 208240661U
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Abstract
Present disclose provides a kind of micro capillary groove evaporators, including micro-nano compound structure surface is heat sink takes hot face and radiating surface, wherein have hydrophilic nano coating on micro-nano compound structure surface is heat sink；It takes hot face and radiating surface to surround a closed cavity, contains liquid working substance in closed cavity, in the cavity, to the heat sink application high voltage electric field in micro-nano compound structure surface, form EHD effect.The ultra-high surface that hydrophilic nano coating has on the micro-nano compound structure surface of the micro capillary groove evaporator of the disclosure can enhance surface energy and roughness of the liquid working substance in micro-channel, improve surface wetting characteristic, electric field action applies directional draw to liquid working substance, increase the mass flow of liquid working substance, so that heat sink occur continual high-strength composite phase-change heat-exchange, the exchange capability of heat of radiator is enhanced.
Description
Technical field
The disclosure belongs to enhanced heat exchange and electrical cooling field, and in particular to a kind of micro capillary groove evaporator.
Background technique
With the high speed development of microelectronics and MEMS, chip integration and performance are continuously improved, so that electric
Sub- equipment tends to high-power, miniaturization.Thus the calorific value of device is also significantly increased, if heat cannot be arranged in time
Out, it will serious stability, the reliability for reducing device and system, or even cause the collapse of system.Therefore heat dissipation is high-power
High power density power electronic devices design and manufacture in critical bottleneck problem.When heat flow density is more than 150W/cm2,
More than stock size surface occur pool boiling phase-change heat-exchange critical heat flux density, may be defined as superelevation heat flow density, at this time into
Capable heat transfer process is known as superpower heat exchange.
Micro slot group composite phase change heat transfer technology is set with the features such as its coefficient of heat transfer height, the operation is stable in high-power electric and electronic
It is used widely in standby, it utilizes three-phase line of contact at the extension meniscus that liquid working substance is formed by capillary force in microflute
The nucleate boiling of thickness liquid film region liquid working substance answers at the high-intensitive evaporation in neighbouring evaporation thin film region and intrinsic meniscus
Phase-change heat-exchange mechanism is closed, realizes high-intensitive exchange capability of heat, is a kind of novel high-performance minute yardstick phase-change heat-exchange technology.But
It is that under the conditions of under superelevation heat flow density, the liquid working substance in microflute group can be from top to bottom by with heat source heat flow density
Constantly increase and generate it is dry, if it is dry it is lasting occur, liquid working substance can not be replenished in time, and extend high-strength on meniscus
Degree evaporation will be unable to occur, and high-intensitive composite phase-change heat exchange can not also carry out, the exchange capability of heat that microflute group basis is heat sink by
Greatly deteriorate.Therefore, when liquid working substance along microflute flowing institute it is attainable extension meniscus on wet length become make
The about key point of microflute group exchange capability of heat.
The micro slot group composite phase change heat exchange skill proposed for technological deficiency existing for existing air-cooled or liquid cooling heat transfer technology
Heat dissipation of many researchs that art and technique device in combination carry out to device for high-power power electronic or system is solved
Problem has certain effect, but does not obtain obvious achievement.The power suffered by the device is increasing, and the hot-fluid faced is close
When spending also higher and higher, situation that is dry too early and leading to heat transfer deterioration easily occurs for the liquid working substance in microflute.When heat source function
When rate is increasing, heating power is also increasing, and the heat flow density being applied on microflute group's heating surface is also increasing, micro-
Heated liquid evaporation aggravation on extension meniscus in slot, liquid film is gradually thinning, and flow resistance increases, and wet length reduces, heat dissipation
Ability decline.
Utility model content
(1) technical problems to be solved
Present disclose provides a kind of micro capillary groove evaporators, at least partly to solve technical problem set forth above.
(2) technical solution
Present disclose provides a kind of micro capillary groove evaporators, comprising: takes hot face, is connect by Heat Conduction Material with heat source, is wrapped
Include: microflute group is heat sink；And nano coating, it is created on the heat sink surface of microflute group, it is compound with the heat sink composition micro-nano of microflute group
Body structure surface is heat sink；Radiating surface surrounds a closed cavity with hot face is taken, contains liquid working substance in closed cavity；And electrode,
It is set in closed cavity, connect high voltage power supply, it is heat sink to micro-nano compound structure surface on liquid working substance apply electric field；Its
In, after heat source releases heat, takes hot face to receive and transmit the heat of heat source generation, high-intensitive evaporation and boiling occur for closed cavity
Composite phase-change heat exchange, the heat of releasing are shed by several radiated ribs being connected with radiator to external environment.
In some embodiments of the present disclosure, closed cavity both ends are provided with electrode outlet, wherein the electrode of one end and electricity
Pole leading-out terminal is linked together, and is drawn electric wire in the upper end of closed cavity and connect with high voltage power supply, and electrode leading-out terminal is logical
It crosses electrode pads and clamp nut is fixed on the outside of closed cavity, the electrode of the other end passes through the lower end electrode exit of cavity
Ground connection is drawn after son, electrode pads and clamp nut connection.
In some embodiments of the present disclosure, electrode is line electrode, mesh electrode, plate electrode or needle electrode.
In some embodiments of the present disclosure, the radius of line electrode is 0.001~1mm, and length is 1~500mm, and micro-
The axially vertical distance that slot group is heat sink is 0.1~100mm；Mesh electrode length and width are 1~100mm, with a thickness of 0.5~10mm, net
The mesh equivalent diameter of shape electrode is 0.0001~1mm, is 0.1~100mm with the heat sink axially vertical distance of microflute group；Plate
The length and width of electrode are 1~100mm, and with a thickness of 0.5~10mm, the positive and negative anodes vertical interval of plate electrode is 10~100mm；It is needle-shaped
The radius of curvature of electrode needle point is 0.01~1mm, is 0.1~100mm with the axially vertical distance of microflute group.
In some embodiments of the present disclosure, the voltage of high voltage power supply is 1~50kV.
In some embodiments of the present disclosure, line electrode, the liquid working substance that the microflute group of mesh electrode is heat sink are insulation work
Matter；Plate electrode, the liquid working substance that the microflute group of needle electrode is heat sink are insulation working medium or conductive working medium；Insulation working medium be
FC72, R113, R123, R141 or pentane；Conductive working medium is distilled water or ethyl alcohol.
In some embodiments of the present disclosure, nano coating is nanoscale planar structures or nanoscale protrusion；Nanometer applies
The material of layer is metal, metal oxide, metal fluoride, semiconductor material or organic polymer coating；The thickness of nano coating
Degree is 0~1000nm.
In some embodiments of the present disclosure, the surface texture that microflute group is heat sink is micron grooves channel array structure, nanometer slot
Channel array structure or micro-nano composite slot channel array structure；The micro-channel cross section that microflute group is heat sink be rectangle, triangle or trapezoidal,
Equivalent diameter is 10-3~1000 μm；The material that microflute group is heat sink is metal, metal oxide, metal nitride, semiconductor material
Material, glass or ceramics.
In some embodiments of the present disclosure, the cross section of closed cavity is rectangle, rectangular, triangle or sector；Closing
Cavity is air chamber or vacuum chamber.
In some embodiments of the present disclosure, it is 0 °~180 ° that micro-nano compound structure surface is heat sink with horizontal direction angle.
(3) beneficial effect
It can be seen from the above technical proposal that disclosure micro capillary groove evaporator at least have the advantages that wherein it
One:
(1) ultra-high surface that hydrophilic nano coating has on micro-nano compound structure surface can enhance liquid working substance and exist
Surface energy and roughness in micro-channel, improve surface wetting characteristic, so that heat sink occur continual high intensity
Composite phase-change heat exchange, enhances heat sink exchange capability of heat；
(2) liquid working substance is applied directional and is led by Coulomb force, dielectrophoresis force and the electroluminescent convergent force under electric field action
The effect of drawing increases the mass flow of liquid working substance, reduces thermal resistance, effectively lifts capillary of the liquid working substance in micro-channel and soaks length
Degree；
(3) wet length for improving microflute group work, quickly effectively and timely mends the liquid working substance in micro-channel
It fills, prevents the constricted flow and dry situation compared with liquid working substance under the conditions of high heat flux density, optimization liquid film distribution is further strong
The high-intensitive evaporation and heat-exchange performance for having changed extension meniscus liquid working substance in microflute group, avoid the heat exchange of dry initiation unstable and
The generation of deterioration；
(4) due to quickly can effectively and timely be supplemented the liquid working substance in micro-channel, so can solve heat dissipation
Liquid working substance fills excessive problem in device, so that radiator is light, small size, lightweight；
(5) by nano coating and electric field action, radiator has the ability of superpower heat exchange, so relatively energy saving, consumption
Power is smaller；
(6) since radiator is light, small in size, so having a wide range of application.
Detailed description of the invention
Fig. 1 is the top view of micro capillary groove evaporator in the first embodiment of the present disclosure.
Fig. 2 a is the rectangular cross section schematic diagram of radiator closed cavity shown in Fig. 1.
Fig. 2 b is the square cross section schematic diagram of radiator closed cavity shown in Fig. 1.
Fig. 2 c is the triangular cross section schematic diagram of radiator closed cavity shown in Fig. 1.
Fig. 2 d is the fan shaped cross section schematic diagram of radiator closed cavity shown in Fig. 1.
Fig. 3 is structure and sealing arrangement form of the first embodiment of the present disclosure central electrode in radiator closed cavity.
The schematic diagram that Fig. 4 is heat sink for microflute group in micro capillary groove evaporator in the first embodiment of the present disclosure.
Fig. 5 is the microflute group structure figure that nano coating is nanoscale planar structures in the first embodiment of the present disclosure.
Fig. 6 is the microflute group structure figure that nano coating is nanoscale protrusion in the first embodiment of the present disclosure.
Fig. 7 is first embodiment of the present disclosure central electrode schematic diagram.
Fig. 8 is first embodiment of the present disclosure middle line array electrode schematic diagram.
Fig. 9 is that EHD strengthens the heat sink wetting spy in micro-nano compound structure surface in closed cavity in the first embodiment of the present disclosure
The effect picture of property and heat exchange property.
The schematic diagram that Figure 10 is heat sink for microflute group in micro capillary groove evaporator in the second embodiment of the present disclosure.
The schematic diagram that Figure 11 is heat sink for microflute group in micro capillary groove evaporator in the third embodiment of the present disclosure.
The schematic diagram that Figure 12 is heat sink for microflute group in micro capillary groove evaporator in the fourth embodiment of the present disclosure.
[embodiment of the present disclosure main element symbol description in attached drawing]
10- micro-nano compound structure surface is heat sink；
11- microflute group is heat sink；12- nanoscale planar structures；
13- nanoscale protrusion；
20- electrode；
21- line electrode；22- linear array electrode；
23- mesh electrode；24- needle electrode；
25- plate electrode；26- electrode leading-out terminal；
27- clamp nut；28- electrode pads；
30- takes hot face；
40- liquid working substance；
The closed cavity of 50- radiator；
51- radiator closed cavity rectangular section；52- radiator closed cavity square-section；
53- radiator closed cavity triangular-section；54- radiator closed cavity sector crosssection；
60- high voltage power supply；
70- electric wire；
The fin of 80- radiator.
Specific embodiment
Present disclose provides a kind of micro capillary groove evaporators, including micro-nano compound structure surface is heat sink takes hot face and radiating surface,
Wherein, micro-nano compound structure surface it is heat sink on have hydrophilic nano coating；It takes hot face and radiating surface to surround a closed cavity, seals
Contain liquid working substance in closed chamber body, in the cavity, to the heat sink application high voltage electric field in micro-nano compound structure surface, forms EHD effect.
The ultra-high surface that hydrophilic nano coating has on the micro-nano compound structure surface of the micro capillary groove evaporator of the disclosure can be strengthened
Surface of the liquid working substance in micro-channel can and roughness, improve surface wetting characteristic, electric field action applies liquid working substance
It reorders to draw, increases the mass flow of liquid working substance, so that heat sink occur continual high-strength composite phase inversion
Heat enhances the exchange capability of heat of radiator.
For the purposes, technical schemes and advantages of the disclosure are more clearly understood, below in conjunction with specific embodiment, and reference
The disclosure is further described in attached drawing.
Disclosure some embodiments will be done referring to appended attached drawing in rear and more comprehensively describe to property, some of but not complete
The embodiment in portion will be shown.In fact, the various embodiments of the disclosure can be realized in many different forms, and should not be construed
To be limited to this several illustrated embodiment；Relatively, these embodiments are provided so that the disclosure meets applicable legal requirement.
In first exemplary embodiment of the disclosure, a kind of micro capillary groove evaporator is provided.
Fig. 1 is the top view of first embodiment of the present disclosure micro capillary groove evaporator.As shown in Figure 1, its appearance is a heronsbill
The radiator of type, disclosure micro capillary groove evaporator, which includes that micro-nano compound structure surface is heat sink, takes hot face 30 and radiating surface 90, wherein
There is hydrophilic nano coating on micro-nano compound structure surface is heat sink；It takes hot face 30 and radiating surface 90 to connect and surrounds a closed cavity
50, closed cavity 50 is interior to contain a certain amount of liquid working substance, and in the cavity, heat sink to micro-nano compound structure surface by electrode
Apply high voltage electric field, forms EHD effect；Heat source is by high thermal conductivity material heat-conducting silicone grease, heat conductive silica gel or graphite and takes hot face
30 connections.
In closed cavity 50, liquid working substance is injected, high voltage electric field is applied to liquid working substance, microflute group is multiple in itself micro-nano
Under the driving for closing capillary structure effect, a part of liquid working substance enters in micro-channel and the certain altitude that climbs.In micro-channel face
Surface on arrange wired electrodes, liquid working substance is climbed under the electric field force effect of positive very high voltage by drives edge micro-channel in time
It is raised to higher moistening height, the composite phase-change heat exchange effect of superhigh intensity evaporation and boiling occurs.After heat source releases heat, take
Hot face 30 receives and transmits the heat of heat source generation, and high-intensitive evaporation and boiling composite phase-change heat exchange occur in cavity, releasing
Heat is shed by several radiated ribs 80 being connected with radiator to external environment.
Each component part of the present embodiment micro capillary groove evaporator is described in detail individually below.
Fig. 2 a~2d is the cross-sectional view of radiator closed cavity shown in Fig. 1.As shown in Fig. 2 a~2d, radiator envelope
The cross section of closed chamber body 50 be rectangle (as shown in Figure 2 a), rectangular (as shown in Fig. 2 b), triangle (as shown in Figure 2 c), sector
(as shown in Figure 2 d).Closed cavity 50 is air chamber or vacuum chamber.
Fig. 3 is structure and sealing arrangement form of the first embodiment of the present disclosure central electrode in radiator closed cavity.Such as
Shown in Fig. 3,50 both ends of radiator closed cavity are provided with electrode outlet, and wherein the electrode Yu electrode leading-out terminal of one end are linked as one
Body, and draw electric wire 70 in the upper end of closed cavity, electric wire 70 is connect after drawing with high voltage power supply 60, electrode leading-out terminal 26
More than 50 outside of closed cavity of radiator, it is attached and fixes by electrode pads 28 and clamp nut 27.Closed cavity
For metal cavitg, the electrode of the other end is contacted by electric wire one end with inside cavity at the lower end of cavity, and passes through electrode
Leading-out terminal 26 draws ground connection after connecting with electrode pads 28 and clamp nut 27.
Fig. 4 is the heat sink schematic diagram with electrode of microflute group in micro capillary groove evaporator in the first embodiment of the present disclosure.Such as Fig. 4 institute
Show, it includes microflute group heat sink 11 and nano coating 12 that micro-nano compound structure surface is heat sink, wherein nano coating 12 is created on micro-
Slot group is heat sink 11 surface, with microflute group it is heat sink 11 constitute micro-nano compound structure surface heat sink 10；Electrode 20 is line electrode 21,
It connects high voltage power supply, and the liquid working substance on heat sink to micro-nano compound structure surface 10 applies electric field.
As shown in figure 4, the surface texture of microflute group heat sink 11 be micron grooves channel array structure, nanometer conduit array structure or
Micro-nano composite slot channel array structure.
Microflute group is heat sink 11 micro-channel cross section be rectangle, triangle or trapezoidal；Microflute group is heat sink 11 micro-channel it is horizontal
The equivalent diameter in section is 10-3~1000 μm；Microflute group is heat sink 11 surfacing be metal, metal oxide, nitride metal
Object, semiconductor material, glass or ceramics.
A length of 80~the 150mm of the apparent size that microflute group is heat sink, width are 20~50mm；The size of conduit be groove depth 0.05~
1mm, 0.05~1mm of groove width, 0.05~1mm of separation；
Nano coating 12 be nanoscale planar structures or nanoscale protrusion, wherein；Nano coating is nanometer-level plane knot
The microflute group structure figure of structure is as shown in figure 5, nano coating is as shown in Figure 6 for the microflute group structure figure of nanoscale protrusion.Nanometer
Coating is to increase micro-structure surface surface energy for strengthening micro-structure surface hydrophily, roughness.
The material of nano coating 12 is that metal, metal oxide, metal fluoride, semiconductor material or organic polymer apply
Material；Hydrophilic coating is aluminium oxide, titanium oxide or zinc oxide；Nano coating 12 with a thickness of 0~1000nm.
Electrode 20 is line electrode 21 in the present embodiment, and line electrode includes single line electrode shown in Fig. 7 and shown in Fig. 8
Linear array electrode.
And liquid working substance line electrode arrangement is characterized in line electrode as anode, and one end is in the upper surface of liquid working substance, i.e.,
It does not contact, the other end is immersed in liquid working substance.Cathode is the array frid or other charged metal structures of micro-nano compound structure
Shell.
Fig. 7 is please referred to, line electrode radius is 0.3~1mm, and length is 50~150mm, and liquid working substance did not had line electrode height
5~20mm is adjusted with heat sink axially vertical distance in 1~20mm.
In the present embodiment, high voltage control is adjusted within the scope of 2~20kV.
Liquid working substance is insulating liquid working medium, including FC72, R113, R123, R141, pentane etc..
It is vacuum condition or condition of normal pressure in closed cavity.
It should be noted that electrode 20 can also be mesh electrode, plate electrode and needle electrode.
So far, the introduction of first embodiment of the present disclosure micro capillary groove evaporator finishes.
Fig. 9 is the effect picture that EHD strengthens the heat sink wetting characteristics in micro-nano compound structure surface and heat exchange property in closed cavity.
As shown in figure 9, microflute group is heat sink by realizing superpower heat exchange in terms of following two in the embodiment of the present disclosure:
(1) nano coating is prepared on microflute group is heat sink, forms micro-nano compound structure surface heat sink 10.Nano coating has
Hydrophily, stability, nano coating effect are the wetabilitys by strengthening microflute group heat sink surface, improve the capillary profit of microflute group
Wet ability keeps micro-nano compound structure heat sink in tilt angle even vertical placement, and capillary moistening height is higher, realizes effect
As shown in Figure 9.
In application, heat source 30 passes through the connection of the high thermal conductivity materials such as heat-conducting silicone grease, heat conductive silica gel, graphene, heat conduction
To microflute, group is heat sink, and the vertical micro-nano compound structure heat sink 10 for placing application is made in the capillary of its own micro-nano compound structure first
Under, liquid working substance 40 climbs along its array micro-channel to certain moistening height, when the superelevation hot-fluid that heat source 40 distributes is close
When degree is inputted perpendicular to heat sink direction, heat sink heat exchange surface major part region is wetted, and extension bent moon occurs in microflute at this time
The high-strength composite phase-change heat-exchange of the nucleate boiling of the evaporation in thin liquid film region and thick liquid film, strengthens changing for liquid working substance 40 on face
Hot property.The spreader surface that heat is delivered to outside closed cavity 50 simultaneously radiates.In closed cavity 50, occur compound
The steam of phase-change heat-exchange encounters peripheral wall surface and condenses, and condensing droplet, which reenters, realizes circulation in liquid working substance.
(2) EHD effect is generated in the electric field that micro-nano compound structure heat sink surface applies liquid working substance, the effect realized
Fruit is as shown in Figure 9.
In application, EHD effect is by the Coulomb force of electric field, the collective effect of dielectrophoretic force and electroluminescent convergent force, once
Occur under superelevation heat flow density, in micro-channel part it is dry when, the various different forms arranged on the surface that conduit faces
Electrode 20 on micro-nano compound structure surface 10 40 generation of liquid working substance act on, liquid working substance is on the one hand generated
Existing moistening height, hydrophilic nano coating on another aspect micro-nano compound structure surface are lifted in time under electric field force effect
The ultra-high surface having also can further strengthen the wetting characteristics of microflute, so that heat sink occur continual high intensity
Composite phase-change heat exchange not only enhances heat sink exchange capability of heat, but also improves heat sink be resistant to critical heat flux density, finally makes
The heat sink heating problem that can solve high-power, superelevation heat flow density power electric component, further, the heat quilt of releasing
It is transmitted to outside closed cavity and carries out cooling.Heat sink timely fluid infusion ability ensure that the reliable of heat sink superpower heat exchange property
Property.
In second exemplary embodiment of the disclosure, a kind of micro capillary groove evaporator is provided.Figure 10 is the disclosure the
The heat sink schematic diagram with electrode of microflute group in two embodiment micro capillary groove evaporators.Microflute as shown in Figure 10, with first embodiment
Group radiator is compared, and the difference of the present embodiment micro capillary groove evaporator is:
Electrode is mesh electrode 23.The form of this electrode arrangement is electrode as anode, and one end is in liquid working substance
Above, i.e., it is not contacted with liquid working substance, the other end is immersed in liquid working substance.Cathode be micro-nano compound structure array frid or
The shell of other charged metal structures.
A length of 80~the 150mm of the apparent size of mesh electrode, width are that 20~50mm (if mesh electrode, then work as by mesh
Amount diameter is 0.5~1mm), liquid working substance did not had mesh electrode 5~20mm of height, with heat sink axially vertical distance in 1~20mm
It is adjusted in range.
In closed cavity, liquid working substance is injected, high voltage electric field is applied to liquid working substance, microflute group is compound in itself micro-nano
Under the driving of capillary structure effect, a part of liquid working substance enters in micro-channel and the certain altitude that climbs.It is faced in micro-channel
Surface on be disposed with Figure 10 mesh electrode, liquid working substance under the electric field force effect of positive very high voltage by drives edge micro-channel and
When climb to higher moistening height, the composite phase-change heat exchange effect of superhigh intensity evaporation and boiling occurs.
In order to achieve the purpose that brief description, any technical characteristic for making same application is described all in above-described embodiment one
And in this, without repeating identical narration.
So far, a kind of micro capillary groove evaporator introduction of the second embodiment of the present disclosure finishes.
In the third exemplary embodiment of the disclosure, a kind of micro capillary groove evaporator is provided.
Figure 11 is the heat sink schematic diagram with electrode of microflute group in third embodiment of the present disclosure micro capillary groove evaporator.Such as Figure 11 institute
Show, compared with the micro capillary groove evaporator of first embodiment, the difference of the present embodiment micro capillary groove evaporator is:
Electrode is needle electrode 24, this kind of electrode arrangement form is electrode as the hanging arrangement of anode, and cathode is multiple for micro-nano
Close the array frid of structure or the shell of other charged metal structures.
The radius of curvature of needle electrode needle point is 0.05~0.5mm, can be in 1~20mm model with heat sink axially vertical distance
Enclose interior adjusting.
Liquid working substance be can be insulating liquid working medium, including FC72, R113, R123, R141, pentane etc.；It can also be with
For conductive working medium, including distilled water, ethyl alcohol etc..
It is condition of normal pressure in closed cavity.
In closed cavity, liquid working substance is injected, high voltage electric field is applied to liquid working substance, microflute group is compound in itself micro-nano
Under the driving of capillary structure effect, a part of liquid working substance enters in micro-channel and the certain altitude that climbs.It is faced in micro-channel
Surface on be disposed with needle electrode shown in Figure 11, needle electrode generates suction force, lifting is in battle array in time by ionized air
It with the liquid working substance of certain altitude in column channel structure, promotes moistening height further, superhigh intensity evaporation and boiling occurs
The composite phase-change heat exchange effect risen.
In order to achieve the purpose that brief description, any technical characteristic for making same application is described all in above-described embodiment one
And in this, without repeating identical narration.
So far, a kind of micro capillary groove evaporator introduction of the third embodiment of the present disclosure finishes.
In the 4th exemplary embodiment of the disclosure, a kind of micro capillary groove evaporator is provided.
Figure 12 is the heat sink schematic diagram with electrode of microflute group in third embodiment of the present disclosure micro capillary groove evaporator.Such as Figure 12 institute
Show, compared with the microflute group of the superpower heat exchange of first embodiment is heat sink and preparation method thereof, the microflute of the superpower heat exchange of the present embodiment
The difference that group is heat sink and preparation method thereof is:
Electrode is plate electrode 25, this kind of electrode arrangement is characterized in that electrode did not had liquid as anode in closed cavity
Working medium, cathode are fixed on vertical frid upper end.
The size length and width of plate electrode positive and negative anodes are 10~30mm, and anode is immersed in liquid working substance, positive electrode and negative electrode
Axial distance is 40~100mm.
Liquid working substance can be insulating liquid working medium, including FC72, R113, R123, R141, pentane；Or it leads
Electrician's matter, including distilled water, ethyl alcohol.
It is vacuum condition or condition of normal pressure in closed cavity.
In closed cavity, liquid working substance is injected, high voltage electric field is applied to liquid working substance, microflute group is compound in itself micro-nano
Under the driving of capillary structure effect, a part of liquid working substance enters in micro-channel and the certain altitude that climbs.It is faced in micro-channel
Surface on be disposed with plate electrode shown in Figure 12, since positive plate is placed in liquid working substance, liquid working substance is just high
Under the electric field force effect of voltage by drives edge micro-channel climb in time to certain moistening height, occur superhigh intensity evaporation and
The composite phase-change heat exchange of boiling acts on.
So far, the introduction of fourth embodiment of the present disclosure micro capillary groove evaporator finishes.
So far, attached drawing is had been combined the embodiment of the present disclosure is described in detail.According to above description, art technology
Personnel should have clear understanding to disclosure micro capillary groove evaporator.
It should be noted that in attached drawing or specification text, the implementation for not being painted or describing is affiliated technology
Form known to a person of ordinary skill in the art, is not described in detail in field.In addition, the above-mentioned definition to each element and method is simultaneously
It is not limited only to various specific structures, shape or the mode mentioned in embodiment, those of ordinary skill in the art can carry out letter to it
It singly changes or replaces.
In conclusion present disclose provides a kind of micro capillary groove evaporator, including micro-nano compound structure surface is heat sink takes hot face
And radiating surface, wherein have hydrophilic nano coating on micro-nano compound structure surface is heat sink；Hot face and radiating surface is taken to surround an envelope
Closed chamber body contains liquid working substance in closed cavity, in the cavity, to the heat sink application high voltage electric field in micro-nano compound structure surface, shape
At EHD effect.The superelevation that hydrophilic nano coating has on the micro-nano compound structure surface of the micro capillary groove evaporator of the disclosure
Surface can enhance surface energy and roughness of the liquid working substance in micro-channel, improve surface wetting characteristic, electric field action pair
Liquid working substance applies directional draw, increases the mass flow of liquid working substance, so that heat sink occur continual high intensity
Composite phase-change heat exchange, enhances the exchange capability of heat of radiator.
It unless there are known entitled phase otherwise anticipates, the numerical parameter in this specification and appended claims is approximation, energy
Enough bases pass through the resulting required characteristic changing of content of this disclosure.Specifically, all be used in specification and claim
The middle content for indicating composition, the number of reaction condition etc., it is thus understood that repaired by the term of " about " in all situations
Decorations.Under normal circumstances, the meaning expressed refers to include by specific quantity ± 10% variation in some embodiments, some
± 5% variation in embodiment, ± 1% variation in some embodiments, in some embodiments ± 0.5% variation.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of each open aspect,
Above in the description of the exemplary embodiment of the disclosure, each feature of the disclosure is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. required to protect
The disclosure of shield requires features more more than feature expressly recited in each claim.More precisely, as following
Claims reflect as, open aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following specific embodiment are expressly incorporated in the specific embodiment, wherein each claim itself
All as the separate embodiments of the disclosure.
Particular embodiments described above has carried out further in detail the purpose of the disclosure, technical scheme and beneficial effects
Describe in detail it is bright, it is all it should be understood that be not limited to the disclosure the foregoing is merely the specific embodiment of the disclosure
Within the spirit and principle of the disclosure, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the disclosure
Within the scope of shield.
Claims (10)
1. a kind of micro capillary groove evaporator characterized by comprising
Hot face (10) are taken, are connect by Heat Conduction Material with heat source (30), comprising:
Microflute group is heat sink (11)；And
Nano coating (12) is created on the surface of the microflute group heat sink (11), constitutes with the microflute group heat sink (11) micro-
Nano compound structure surface is heat sink；
Radiating surface (90) takes hot face (10) to surround a closed cavity (50), contains liquid in the closed cavity (50) with described
Body working medium；And
Electrode (20) is set in the closed cavity (50), is connected high voltage power supply (60), to the micro-nano compound structure table
Liquid working substance on face is heat sink applies electric field；
Wherein, after heat source releases heat, the heat for taking hot face (10) to receive and to transmit heat source generation, the closed cavity (50)
Interior to occur high-intensitive evaporation and boiling composite phase-change heat exchange, the heat of releasing passes through several cooling fins for being connected with radiator
Piece (80) sheds to external environment.
2. micro capillary groove evaporator according to claim 1, which is characterized in that
Closed cavity (50) both ends are provided with electrode outlet, and wherein the electrode Yu electrode leading-out terminal (26) of one end are linked as one
Body, and electric wire (70) are drawn in the upper end of closed cavity and are connect with high voltage power supply (60), the electrode leading-out terminal (26) is logical
It crosses electrode pads (28) and clamp nut (27) is fixed on the outside of closed cavity, the electrode of the other end passes through the electricity of cavity lower end
Ground connection is drawn after pole leading-out terminal (26), electrode pads (28) and clamp nut (27) connection.
3. micro capillary groove evaporator according to claim 1, which is characterized in that
The electrode (20) is line electrode, mesh electrode, plate electrode or needle electrode.
4. micro capillary groove evaporator according to claim 3, which is characterized in that
The radius of the line electrode is 0.001~1mm, and length is 1~500mm, is hung down with the axial direction of the microflute group heat sink (11)
Straight distance is 0.1~100mm；
The mesh electrode length and width are 1~100mm, and with a thickness of 0.5~10mm, the mesh equivalent diameter of the mesh electrode is
0.0001~1mm, the axially vertical distance with the microflute group heat sink (11) are 0.1~100mm；
The length and width of the plate electrode are 1~100mm, and with a thickness of 0.5~10mm, the positive and negative anodes vertical interval of plate electrode is 10
~100mm；
The radius of curvature of the needle electrode needle point is 0.01~1mm, is 0.1~100mm with the axially vertical distance of microflute group.
5. micro capillary groove evaporator according to claim 1, which is characterized in that
The voltage of the high voltage power supply is 1~50kV.
6. micro capillary groove evaporator according to claim 3, which is characterized in that
The line electrode, the liquid working substance that the microflute group of mesh electrode is heat sink are insulation working medium；
The plate electrode, the liquid working substance that the microflute group of needle electrode is heat sink are insulation working medium or conductive working medium；
The insulation working medium is FC72, R113, R123, R141 or pentane；
The conduction working medium is distilled water or ethyl alcohol.
7. micro capillary groove evaporator according to claim 1, which is characterized in that
The nano coating (12) is nanoscale planar structures or nanoscale protrusion；
The material of the nano coating (12) is metal, metal oxide, metal fluoride, semiconductor material or organic polymer
Coating；
The nano coating (12) with a thickness of 0~1000nm.
8. micro capillary groove evaporator according to claim 1, which is characterized in that
The surface texture of the microflute group heat sink (11) is that micron grooves channel array structure, nanometer conduit array structure or micro-nano are compound
Conduit array structure；
The micro-channel cross section of the microflute group heat sink (11) is rectangle, triangle or trapezoidal, equivalent diameter 10-3~1000 μ
m；
The material of the microflute group heat sink (11) is metal, metal oxide, metal nitride, semiconductor material, glass or pottery
Porcelain.
9. micro capillary groove evaporator according to claim 1, which is characterized in that
The cross section of the closed cavity (50) is rectangle, rectangular, triangle or sector；
The closed cavity (50) is air chamber or vacuum chamber.
10. micro capillary groove evaporator according to claim 1, which is characterized in that
It is 0 °~180 ° that the micro-nano compound structure surface is heat sink with horizontal direction angle.
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| CN201820248611.1U CN208240661U (en) | 2018-02-11 | 2018-02-11 | Micro capillary groove evaporator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108133918A (en) * | 2018-02-11 | 2018-06-08 | 中国科学院工程热物理研究所 | Micro capillary groove evaporator |
-
2018
- 2018-02-11 CN CN201820248611.1U patent/CN208240661U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108133918A (en) * | 2018-02-11 | 2018-06-08 | 中国科学院工程热物理研究所 | Micro capillary groove evaporator |
| CN108133918B (en) * | 2018-02-11 | 2024-04-26 | 中国科学院工程热物理研究所 | Micro-groove group radiator |
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