CN203083410U - Porous reinforcement boiling microchannel with inner grooves - Google Patents
Porous reinforcement boiling microchannel with inner grooves Download PDFInfo
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- CN203083410U CN203083410U CN 201220475644 CN201220475644U CN203083410U CN 203083410 U CN203083410 U CN 203083410U CN 201220475644 CN201220475644 CN 201220475644 CN 201220475644 U CN201220475644 U CN 201220475644U CN 203083410 U CN203083410 U CN 203083410U
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Abstract
This utility model discloses a porous reinforcement boiling microchannel with inner grooves, which comprises a metallic fiber sintered felt. The metallic fiber sintered felt is formed by sintering metal powder and particles of the metallic fiber sintered felt are uniformly distributed. The porous surface of the porous reinforcement boiling microchannel with inner grooves has capillary characteristics, which keep sufficient moisture on the wall of the porous reinforcement boiling microchannel with inner grooves, prevents heat spots, local scabs and polymer deposition caused by desiccation. Furthermore, the porous structure enhances boiling heat transfer, improves heat transfer coefficient and critical heat flux density, and has an enhanced effect of heat transfer.
Description
Technical field
The utility model relates to the inner groovy porous of the evaporimeter that is applied to heat pipe wicks, soaking plate, capillary pump ring etc., the heat exchange core of heat exchanger etc. and strengthens boiling MCA technical field, and particularly a kind of inner groovy porous is strengthened the boiling MCA.
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 improve heat transfer situation greatly 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 different shape, 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 methods such as chemical etching, micromachined, laser ablation, thermal sintering.Though 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 significance.
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 big defective of porous material flow resistance, can expect that it will further be strengthened caloic and transport effect, the boiling of the inner groovy porous of slug type reinforcement at present MCA yet there are no report.
The utility model content
Goal of the invention of the present utility model 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. at existing, provides a kind of inner groovy porous to strengthen the heat exchanger of boiling MCA.
For achieving the above object, the technical solution adopted in the utility model is:
Provide a kind of inner groovy porous to strengthen the boiling MCA, comprise the metal sintering felt of the even particle distribution that forms by metal powder sintered back, 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 65 μ m～140 μ m, 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 feeds hydrogen as gas shield, under 800 ℃～900 ℃, and insulation 30min～90min;
(4) stove is chilled to room temperature, and withdrawing pattern then can obtain being evenly distributed with on it metal sintering felt of inner groovy then, and promptly described inner groovy porous is strengthened the 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, with the inner groovy complementation; Mould inside hollow in described, 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 2mm～3mm.
Preferably, in the step (4), described withdrawing pattern is that last, middle mould is taken off, and axially the metal sintering felt of metal powder sintered formation is released along inner groovy then, obtains the inner groovy porous and strengthens the boiling structure.
The inner groovy porous is strengthened the application of boiling MCA in the electric equipment products heat exchanger.
The utility model has following beneficial effect with respect to prior art:
1, the utility model inner groovy porous strengthens that the boiling MCA has that porosity is big, bond strength is high, specific area big and 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 takes place in the liquid film, helps 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 (75～110 μ m) ESEM (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 (75～110 μ m) ESEM (SEM) vertical view;
Fig. 7 is Ω shape groove copper ball powder (75～110 μ m) ESEM (SEM) figure;
Fig. 8 is Ω shape groove copper branch powder (75～110 μ m) ESEM (SEM) figure.
The specific embodiment
Below in conjunction with the drawings and specific embodiments utility model purpose of the present utility model is done to describe in further detail, embodiment can not give unnecessary details one by one at this, but therefore embodiment of the present utility model is not defined in following examples.Unless stated otherwise, the material and the processing method of the utility model employing are present technique field conventional material and processing method.
Embodiment 1
A kind of inner groovy porous is strengthened the boiling MCA, comprises the metal sintering felt 4 of the even particle distribution that is formed by metal powder sintered back, 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 a 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 made up 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; In mould inside hollow, and middle mould is located on the bed die, the height of middle mould is between 2～3mm, so the porous metals felt that sintering forms also is 2～3mm; 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, earlier 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 75～110 μ m 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; Mould 2 upper surfaces pushed during bulge-structure 31 axial directions were close to mold 1 vertically, and the cavity cap that filling finishes is real.
(3) the plane graphite jig with filled with metal powder places the sintering furnace sintering, and feeds hydrogen as gas shield, under 800～900 ℃, is incubated 30～90 minutes.
(4) stove is chilled to room temperature, will go up, middle mould takes off gently, along the Baltimore groove axial direction metal sintering felt released gently then, 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 again, insulation bakelite 11 is by thermocouple 10 insulations; 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.
Present embodiment is except that following characteristics, and other are all identical with embodiment 1: as shown in Figure 8, the grain shape of metal dust is a shape.
The foregoing description is preferred embodiment of the present utility model only, is not to be used for limiting practical range of the present utility model.Be that all equalizations of being done according to the utility model content change and modification, all contained by the utility model claim scope required for protection.
Claims (5)
1. an inner groovy porous is strengthened the boiling MCA, it is characterized in that: comprise the metal sintering felt of the even particle distribution that is formed by metal powder sintered back, 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, and it is characterized in that: the diameter of described metal dust is between 65 μ m～140 μ m.
5. inner groovy porous according to claim 1 is strengthened the boiling MCA, and it is characterized in that: described metal dust is copper powder or nickel powder, and the grain shape of described metal dust is spherical or branch shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220475644 CN203083410U (en) | 2012-09-18 | 2012-09-18 | Porous reinforcement boiling microchannel with inner grooves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220475644 CN203083410U (en) | 2012-09-18 | 2012-09-18 | Porous reinforcement boiling microchannel with inner grooves |
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| CN203083410U true CN203083410U (en) | 2013-07-24 |
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| CN 201220475644 Expired - Fee Related CN203083410U (en) | 2012-09-18 | 2012-09-18 | Porous reinforcement boiling microchannel with inner grooves |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878845A (en) * | 2012-09-18 | 2013-01-16 | 华南理工大学 | Inner groove porous strengthened boiling micro-channel structure, manufacture method and application |
| 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 |
| CN105180700A (en) * | 2015-09-10 | 2015-12-23 | 华北电力大学 | Porous wall surface heat exchange tube with fixed evaporation core and preparation method of porous wall surface heat exchange tube |
| CN105258548A (en) * | 2015-09-10 | 2016-01-20 | 华北电力大学 | Preparation method which is used for porous boiling surface and capable of controlling vaporization core |
| CN107979953A (en) * | 2017-11-22 | 2018-05-01 | 上海交通大学 | Graded metal foam and fin combined radiator |
-
2012
- 2012-09-18 CN CN 201220475644 patent/CN203083410U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878845A (en) * | 2012-09-18 | 2013-01-16 | 华南理工大学 | Inner groove porous strengthened boiling micro-channel structure, manufacture method and application |
| CN105180700A (en) * | 2015-09-10 | 2015-12-23 | 华北电力大学 | Porous wall surface heat exchange tube with fixed evaporation core and preparation method of porous wall surface heat exchange tube |
| CN105258548A (en) * | 2015-09-10 | 2016-01-20 | 华北电力大学 | Preparation method which is used for porous boiling surface and capable of controlling vaporization core |
| CN105258548B (en) * | 2015-09-10 | 2017-03-01 | 华北电力大学 | A kind of porous boiling surface preparation method that can control the nucleus of boiling |
| CN105180700B (en) * | 2015-09-10 | 2017-06-06 | 华北电力大学 | A kind of porous wall heat exchanger tube with the fixed nucleus of boiling and preparation method thereof |
| 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 |
| CN107979953A (en) * | 2017-11-22 | 2018-05-01 | 上海交通大学 | Graded metal foam and fin combined radiator |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20160918 |