CN102878845A - Inner groove porous strengthened boiling micro-channel structure, manufacture method and application - Google Patents
Inner groove porous strengthened boiling micro-channel structure, manufacture method and application Download PDFInfo
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- CN102878845A CN102878845A CN2012103460313A CN201210346031A CN102878845A CN 102878845 A CN102878845 A CN 102878845A CN 2012103460313 A CN2012103460313 A CN 2012103460313A CN 201210346031 A CN201210346031 A CN 201210346031A CN 102878845 A CN102878845 A CN 102878845A
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Abstract
The invention discloses an inner groove porous strengthened boiling micro-channel structure, which includes a metal sintered felt formed by sintering metal powder and provided with uniformly-distributed particles, wherein a plurality of inner grooves are uniformly distributed in the metal sintered felt. The porous surface of the inner groove porous strengthened boiling micro-channel structure has excellent capillary characteristics, can keep the wall surface to be sufficiently damp, avoids the local scabbing and polymer deposit caused by hot spot and local drying, improves the heat transfer coefficient and critical heat flux density by adopting the porous structure for strengthened boiling heat transfer, and has excellent strengthened heat transfer effect.
Description
Technical field
The inner groovy porous that the present invention relates to be applied to the evaporimeter of heat pipe wicks, soaking plate, capillary pump ring etc., the heat exchange core of heat exchanger etc. is strengthened boiling MCA technical field, and particularly a kind of inner groovy porous is strengthened boiling MCA and manufacture method and application.
Background technology
At present, along with progressively swelling of energy crisis, energy savings and effectively utilize natural resources to become the topic that the whole world is paid close attention to.
Step into 21st century, the integrated level of various electric equipment products is more and more higher, and train of mechanism becomes increasingly complex, and power requirement is also improving constantly, and the each side reason causes heat dissipation problem more and more outstanding.Minute yardstick heat management and caloic transport becomes the key that can little electricity and photoelectric device reliably working.
Porous is strengthened the boiling MCA can cause the blending that fluid is strong, even can greatly improve heat transfer situation under low flow velocity.Heat exchanger with porous reinforcement boiling MCA has good heat exchange property, not only can increase effective utilization rate of energy, and can promote the exploitation of energy-saving machinery and electronic product, its core to be to design a kind of inner groovy porous to strengthen the boiling MCA.
At present, the main method of enhanced boiling heat transfer is to improve the heat transfer surface structures of heat exchanger, and surface texture commonly used has the groove of various shapes, fin and porous surface.These structures can increase boiling surface nucleus of boiling number, improve the heat flow density of facing of boiling, reduce the required overtemperature of liquid boiling, increase the bubble nucleating position of boiling surface, play the effect of enhanced boiling heat transfer.Porous is strengthened the boiling MCA because of its efficient boiling heat transfer, Low Temperature Difference boiling, high critical heat flux density and good anti-blocking ability, is widely used in Industrial Engineering.
Caloic transports strengthens the loose structure manufacture view, mainly contains the methods such as chemical etching, micromachined, laser ablation, thermal sintering.Although chemical etching, micromachined, laser etching method can be processed the loose structure of atomic thin even nanoscale, because high cost, tediously long manufacturing cycle still face a difficult problem on applying.Therefore, study novel porous structure low cost, high efficiency manufacture method, further investigation loose structure caloic transports mechanism, and the caloic that improves microdevice transports performance and has important theory and practice meaning.
And the inner groovy porous is strengthened the boiling MCA because it has the two-fold advantage of loose structure and concave shaped structure concurrently, and remedy the large defective of porous material flow resistance, can expect that it will further be strengthened caloic and transport effect, the at present inner groovy porous of slug type reinforcement boiling MCA yet there are no report.
Summary of the invention
Goal of the invention of the present invention is the technical deficiency that is applied to the inner groovy porous surface material of the evaporimeter of heat pipe wicks, soaking plate, capillary pump ring etc., the heat exchange core of heat exchanger etc. for existing, provides a kind of inner groovy porous to strengthen the heat exchanger of boiling MCA.
Further, the invention provides the manufacture method that a kind of inner groovy porous is strengthened the heat exchanger of boiling MCA.
Further, the invention provides the inner groovy porous and strengthen the application of boiling MCA in the electric equipment products heat exchanger.
For achieving the above object, the technical solution used in the present invention is:
Provide a kind of inner groovy porous to strengthen the boiling MCA, comprise the metal sintering felt by the metal powder sintered rear even particle distribution that forms, be evenly distributed with some inner groovies on the metal sintering felt.
Preferably, the cross sectional shape of described inner groovy is for falling " Ω " shape.
Preferably, the thickness of described metal sintering felt is between 2mm～3mm.
Preferably, the diameter of described metal dust is between 65um～140um, and the shape of metal dust is spherical or branch shape, and described metal dust is copper powder or nickel powder.
A kind of inner groovy porous is strengthened the manufacture method of boiling MCA, it is characterized in that comprising the steps:
(1) adopts wire cutting technology processing plane graphite jig;
(2) under pressure-less state, metal dust is filled in the cavity of plane graphite die assembly formation, make metal dust fully fill up till the cavity;
(3) the plane graphite jig with filled with metal powder places the sintering furnace sintering, and passes into hydrogen as gas shield, under 800 ℃～900 ℃, and insulation 30min～90min;
(4) stove is chilled to room temperature, and then withdrawing pattern then can obtain being evenly distributed with on it metal sintering felt of inner groovy, and namely described inner groovy porous is strengthened boiling structure.
Preferably, in the step (1), described plane graphite jig comprises mold, middle mould and bed die, and the bed die upper surface forms equally distributed axial projection structure by the line cutting, and is complementary with inner groovy; Described middle mould inside hollow, and middle mould is located on the bed die; Mold is the plane graphite cake, behind the powder filler, mold is located on the middle mould.
Preferably, the cross sectional shape of described axial projection structure is " Ω " shape; Preferably, the shape of described axial projection structure is controlled by molybdenum filament.
Preferably, the height of described middle mould is between 2mm～3mm, so the porous metals felt that sintering forms also is 2～3mm.
Preferably, in the step (4), described withdrawing pattern is that upper, middle mould is taken off, and then axially the metal sintering felt of metal powder sintered formation is released along inner groovy, obtains the inner groovy porous and strengthens boiling structure.
The inner groovy porous is strengthened the application of boiling MCA in the electric equipment products heat exchanger.
The present invention has following beneficial effect with respect to prior art:
1, inner groovy porous of the present invention strengthens that the boiling MCA has that porosity is large, bond strength is high, specific area large and the advantage such as thermal resistance is low, a large amount of boiling cores can be provided when boiling, the steam bubble tranmitting frequency is very high on the porous surface, the additional meeting of the generation of steam bubble, rising and liquid causes violent local agglomerate motion occurs in the liquid film, is conducive to boiling heat transfer;
2, this inner groovy porous reinforcement boiling MCA manufacturing process is simple, and employing graphite is mould, and demoulding ratio is easier to, though not fragile metal dust structure, simple operation, production cost is low;
3, the porous surface of this inner groovy porous reinforcement boiling MCA has good wicking property, can keep the enough wetting of wall, scab and polymer deposition in the part that prevents hot spot, local desiccation and cause, while loose structure enhanced boiling heat transfer, improve its heat transfer coefficient and critical heat flux density, had good augmentation of heat transfer effect.
Description of drawings
Fig. 1 is Ω shape groove copper ball powder (75～110um) ESEMs (SEM) enlarged drawing;
Fig. 2 is the axonometric drawing after middle mould and the bed die combination;
Fig. 3 is the profile of graphite plane mould;
Fig. 4 is the explosive view of micro-channel heat exchanger combination;
Fig. 5 is the profile of micro-channel heat exchanger combination;
Fig. 6 is Ω shape groove copper ball powder (75～110um) ESEMs (SEM) top view;
Fig. 7 is Ω shape groove copper ball powder (75～110um) ESEMs (SEM) figure;
Fig. 8 is Ω shape groove copper branch powder (75～110um) ESEMs (SEM) figure.
The specific embodiment
Below in conjunction with the drawings and specific embodiments goal of the invention of the present invention is described in further detail, embodiment can not give unnecessary details one by one at this, but therefore embodiments of the present invention are not defined in following examples.Unless stated otherwise, material and the processing method of the present invention's employing are the art conventional material and processing method.
A kind of inner groovy porous is strengthened the boiling MCA, comprises the metal sintering felt 4 by the metal powder sintered rear even particle distribution that forms, and is evenly distributed with some inner groovies on the metal sintering felt 4.As shown in Figure 1, the cross sectional shape of inner groovy is for falling " Ω " shape.Metal dust is copper powder, and the grain shape of metal dust is spherical.
Above-mentioned inner groovy porous is strengthened the manufacture method of boiling MCA, comprises the steps:
(1) adopts wire cutting technology processing plane graphite jig; Shown in Fig. 2 and 3, the plane graphite jig is comprised of mold 1, middle mould 2, bed die 3 three parts, bed die 3 forms equally distributed axial projection structure by line cutting, and axial projection structure and inner groovy complementary structure are by the shape of the TRAJECTORY CONTROL bulge-structure of molybdenum filament; Middle mould inside hollow, and middle mould is located on the bed die, and the height of middle mould is between the 3mm, so the porous metals felt that sintering forms also is 3mm; Mold is the plane graphite cake, behind the powder filler, in mould in the mold embedding.
(2) under pressure-less state, metal dust is filled in the cavity of plane graphite die assembly formation, make metal dust fully fill up till the cavity; Shown in shown in Fig. 2 and 3, first with square bed die 3 horizontal positioned, then with middle mould 2(square square frame) place gently on the bed die 3, make it surround the axial projection structure of bed die 3.The Ω shape groove copper ball powder of 100um is evenly filled up in the cavity of middle mould 2 and bed die 3 formation, and the mould that in good time vibrates during filling is fully filled the copper ball powder; Bulge-structure 31 axial directions are close to middle mould 2 upper surfaces with mold 1 and are pushed vertically, will fill complete cavity cap real.
(3) the plane graphite jig with filled with metal powder places the sintering furnace sintering, and passes into hydrogen as gas shield, under 850 ℃, is incubated 60 minutes.
(4) stove is chilled to room temperature, and upper, middle mould is taken off gently, then along the Baltimore groove axial direction metal sintering felt is released gently, and the inner groovy porous that obtains shown in Fig. 6 and 7 is strengthened the boiling MCA.
The inner groovy porous is strengthened the application of boiling MCA in the electric equipment products heat exchanger: the combination of micro-channel heat exchanger.Shown in Figure 4 and 5, heating copper billet 9 is embedded in the intermediate groove of the cavity 6 that flows; The inner groovy porous is strengthened boiling MCA 8 place on the heating copper billet 9, and apply one deck heat-conducting silicone grease between the two; It is concordant with runner cavity 6 runners that the inner groovy porous is strengthened boiling MCA 8; To heat the cavity that copper billet 9 places insulation bakelite 11, insulation bakelite 11 is by thermocouple 10 insulations again; Be provided with seal washer 7 between upper cover plate 5 and the mobile cavity 6; By bolt, upper cover plate 5, the cavity 6 that flows, insulation bakelite 11 are locked, thereby make micro-channel heat exchanger.
This micro-channel heat exchanger has the inner groovy porous and strengthens boiling MCA 8, thereby has improved heat transfer coefficient and critical heat flux density, has good augmentation of heat transfer effect.
The present embodiment is except following characteristics, and other are all identical with embodiment 1: as shown in Figure 8, the grain shape of metal dust is a shape.
Above-described embodiment is preferred embodiment of the present invention only, is not to limit practical range of the present invention.Be that all equalizations of doing according to content of the present invention change and modification, all contained by claim of the present invention scope required for protection.
Claims (10)
1. an inner groovy porous is strengthened the boiling MCA, it is characterized in that: comprise the metal sintering felt by the metal powder sintered rear even particle distribution that forms, be evenly distributed with some inner groovies on the metal sintering felt.
2. inner groovy porous according to claim 1 is strengthened the boiling MCA, it is characterized in that: the cross sectional shape of described inner groovy is for falling " Ω " shape.
3. inner groovy porous according to claim 1 is strengthened the boiling MCA, and it is characterized in that: the thickness of described metal sintering felt is between 2mm～3mm.
4. inner groovy porous according to claim 1 is strengthened the boiling MCA, it is characterized in that: the diameter of described metal dust is between 65um～140um, and the grain shape of metal dust is spherical or branch shape, and described metal dust is copper powder or nickel powder.
One kind according to claim 1-4 each described inner groovy porous strengthen the manufacture method of boiling MCA, it is characterized in that comprising the steps:
(1) adopts wire cutting technology processing plane graphite jig;
(2) under pressure-less state, metal dust is filled in the cavity of plane graphite die assembly formation, make metal dust fully fill up till the cavity;
(3) the plane graphite jig with filled with metal powder places the sintering furnace sintering, and passes into hydrogen as gas shield, under 800 ℃～900 ℃, and insulation 30min～90min;
(4) stove is chilled to room temperature, and then withdrawing pattern then can obtain being evenly distributed with on it metal sintering felt of inner groovy, and namely described inner groovy porous is strengthened boiling structure.
6. inner groovy porous according to claim 5 is strengthened the manufacture method of boiling MCA, it is characterized in that: described plane graphite jig comprises mold, middle mould and bed die, the bed die upper surface forms equally distributed axial projection structure by the line cutting, and axial projection structure and inner groovy are complementary; Described middle mould inside hollow, and middle mould is located on the bed die; Mold is the plane graphite cake, behind the powder filler, mold is located on the middle mould.
7. inner groovy porous according to claim 6 is strengthened the manufacture method of boiling MCA, it is characterized in that: the cross sectional shape of described axial projection structure is " Ω " shape; The shape of described axial projection structure is controlled by molybdenum filament.
8. inner groovy porous according to claim 7 is strengthened the manufacture method of boiling MCA, and it is characterized in that: the height of described middle mould is between 2mm～3mm.
9. inner groovy porous according to claim 5 is strengthened the manufacture method of boiling MCA, it is characterized in that: in the described step (4), withdrawing pattern is that upper, middle mould is taken off, then axially the metal sintering felt of metal powder sintered formation is released along inner groovy, obtained the inner groovy porous and strengthen boiling structure.
10. strengthen the application of boiling MCA in the electric equipment products heat exchanger such as each described inner groovy porous of claim 1-9.
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486889A (en) * | 2013-10-10 | 2014-01-01 | 昆山德泰新材料科技有限公司 | Ultra-thin heat pipe |
| CN103499229A (en) * | 2013-10-10 | 2014-01-08 | 昆山德泰新材料科技有限公司 | Thin type heat pipe |
| CN103759567A (en) * | 2014-01-24 | 2014-04-30 | 宋荣凯 | Copper pipe for evaporator and manufacturing method of copper pipe |
| CN103822519A (en) * | 2014-02-13 | 2014-05-28 | 中国科学院工程热物理研究所 | Porous surface boiling heat exchange enhancement device and method for manufacturing same |
| CN104154777A (en) * | 2014-08-01 | 2014-11-19 | 厦门大学 | Micro-channel heat exchanger with staggered inner groove structure and manufacturing method of micro-channel heat exchanger |
| CN104792206A (en) * | 2015-04-24 | 2015-07-22 | 江劲松 | Plate type heat pipe with special-shaped grooves |
| CN105127417A (en) * | 2015-09-17 | 2015-12-09 | 上海交通大学 | Metal powder electric assisting pressing forming method and device for micro-channel structure |
| CN105180709A (en) * | 2015-09-10 | 2015-12-23 | 华北电力大学 | Preparing method for porous heat transfer surface with locally controlled hydrophilia and hydrophobicity |
| CN105466268A (en) * | 2015-12-18 | 2016-04-06 | 华南理工大学 | Porous inward-concave enhanced heat transfer structure based on 3D (three dimensional) printing and preparation method of porous inward-concave enhanced heat transfer structure |
| CN105880956A (en) * | 2016-06-16 | 2016-08-24 | 厦门大学 | Microchannel heat exchanger with porous bottom face of micro-pore structures and manufacturing method of microchannel heat exchanger |
| CN106318371A (en) * | 2016-10-31 | 2017-01-11 | 华南理工大学 | Quantum dot synthesis microchannel with compound capillary one-way auxiliary driving structure |
| CN106839844A (en) * | 2017-01-16 | 2017-06-13 | 奇鋐科技股份有限公司 | Capillary structure and the loop circuit heat pipe with the capillary structure |
| CN107843615A (en) * | 2017-09-29 | 2018-03-27 | 华南理工大学 | A kind of ultrasonic field strengthens complicated micro lubricative pores array microchannel boiling heat transfer device |
| CN110741215A (en) * | 2017-04-18 | 2020-01-31 | 欧热管公司 | Evaporator with optimized vaporization interface |
| CN111343836A (en) * | 2020-03-03 | 2020-06-26 | 西安交通大学 | Columnar array porous surface structure, preparation method and jet phase change cooling method thereof |
| CN112846194A (en) * | 2021-01-20 | 2021-05-28 | 南昌欧菲显示科技有限公司 | Surface treatment of vapor chamber, method of processing vapor chamber, and electronic device |
| CN113230681A (en) * | 2021-04-13 | 2021-08-10 | 大连理工大学 | Composite micro-cavity porous curved surface micro-channel structure for liquid film boiling and preparation method thereof |
| CN113275569A (en) * | 2021-04-22 | 2021-08-20 | 大连理工大学 | Composite micro-cavity gradient porous surface for liquid film boiling and preparation method thereof |
| CN113973460A (en) * | 2021-11-05 | 2022-01-25 | 天津航空机电有限公司 | Regenerative cooling heat protection case |
| TWI789894B (en) * | 2021-09-06 | 2023-01-11 | 艾姆勒科技股份有限公司 | Immersion-cooled heat-dissipation structure |
| CN116365136A (en) * | 2023-01-17 | 2023-06-30 | 山东科技大学 | Lithium ion battery shell plate capable of being rapidly cooled and preparation method thereof |
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Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103486889A (en) * | 2013-10-10 | 2014-01-01 | 昆山德泰新材料科技有限公司 | Ultra-thin heat pipe |
| CN103499229A (en) * | 2013-10-10 | 2014-01-08 | 昆山德泰新材料科技有限公司 | Thin type heat pipe |
| CN103759567A (en) * | 2014-01-24 | 2014-04-30 | 宋荣凯 | Copper pipe for evaporator and manufacturing method of copper pipe |
| CN103822519A (en) * | 2014-02-13 | 2014-05-28 | 中国科学院工程热物理研究所 | Porous surface boiling heat exchange enhancement device and method for manufacturing same |
| CN104154777A (en) * | 2014-08-01 | 2014-11-19 | 厦门大学 | Micro-channel heat exchanger with staggered inner groove structure and manufacturing method of micro-channel heat exchanger |
| CN104792206A (en) * | 2015-04-24 | 2015-07-22 | 江劲松 | Plate type heat pipe with special-shaped grooves |
| CN105180709A (en) * | 2015-09-10 | 2015-12-23 | 华北电力大学 | Preparing method for porous heat transfer surface with locally controlled hydrophilia and hydrophobicity |
| CN105127417A (en) * | 2015-09-17 | 2015-12-09 | 上海交通大学 | Metal powder electric assisting pressing forming method and device for micro-channel structure |
| CN105466268A (en) * | 2015-12-18 | 2016-04-06 | 华南理工大学 | Porous inward-concave enhanced heat transfer structure based on 3D (three dimensional) printing and preparation method of porous inward-concave enhanced heat transfer structure |
| CN105880956B (en) * | 2016-06-16 | 2017-11-10 | 厦门大学 | A kind of micro-channel heat exchanger and its manufacture method with micro hole structure porous bottom surface |
| CN105880956A (en) * | 2016-06-16 | 2016-08-24 | 厦门大学 | Microchannel heat exchanger with porous bottom face of micro-pore structures and manufacturing method of microchannel heat exchanger |
| CN106318371B (en) * | 2016-10-31 | 2019-04-09 | 华南理工大学 | A kind of quantum dot synthesis microchannel with the unidirectional auxiliary driving structure of compound capillary |
| CN106318371A (en) * | 2016-10-31 | 2017-01-11 | 华南理工大学 | Quantum dot synthesis microchannel with compound capillary one-way auxiliary driving structure |
| CN106839844A (en) * | 2017-01-16 | 2017-06-13 | 奇鋐科技股份有限公司 | Capillary structure and the loop circuit heat pipe with the capillary structure |
| CN110741215A (en) * | 2017-04-18 | 2020-01-31 | 欧热管公司 | Evaporator with optimized vaporization interface |
| CN107843615A (en) * | 2017-09-29 | 2018-03-27 | 华南理工大学 | A kind of ultrasonic field strengthens complicated micro lubricative pores array microchannel boiling heat transfer device |
| CN111343836A (en) * | 2020-03-03 | 2020-06-26 | 西安交通大学 | Columnar array porous surface structure, preparation method and jet phase change cooling method thereof |
| CN111343836B (en) * | 2020-03-03 | 2021-08-13 | 西安交通大学 | Columnar array porous surface structure, preparation method and jet phase change cooling method thereof |
| CN112846194B (en) * | 2021-01-20 | 2023-12-08 | 江西新菲新材料有限公司 | Vapor chamber surface treatment and vapor chamber processing method, vapor chamber and electronic device |
| CN112846194A (en) * | 2021-01-20 | 2021-05-28 | 南昌欧菲显示科技有限公司 | Surface treatment of vapor chamber, method of processing vapor chamber, and electronic device |
| CN113230681A (en) * | 2021-04-13 | 2021-08-10 | 大连理工大学 | Composite micro-cavity porous curved surface micro-channel structure for liquid film boiling and preparation method thereof |
| CN113230681B (en) * | 2021-04-13 | 2023-03-10 | 大连理工大学 | Composite micro-cavity porous curved surface micro-channel structure for liquid film boiling and preparation method thereof |
| CN113275569A (en) * | 2021-04-22 | 2021-08-20 | 大连理工大学 | Composite micro-cavity gradient porous surface for liquid film boiling and preparation method thereof |
| TWI789894B (en) * | 2021-09-06 | 2023-01-11 | 艾姆勒科技股份有限公司 | Immersion-cooled heat-dissipation structure |
| CN113973460A (en) * | 2021-11-05 | 2022-01-25 | 天津航空机电有限公司 | Regenerative cooling heat protection case |
| CN113973460B (en) * | 2021-11-05 | 2023-10-20 | 天津航空机电有限公司 | Regenerative cooling thermal protection case |
| CN116365136A (en) * | 2023-01-17 | 2023-06-30 | 山东科技大学 | Lithium ion battery shell plate capable of being rapidly cooled and preparation method thereof |
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Application publication date: 20130116 |