CN113194685A - Spray cooling surface enhanced heat exchange fluid director - Google Patents
Spray cooling surface enhanced heat exchange fluid director Download PDFInfo
- Publication number
- CN113194685A CN113194685A CN202110475328.9A CN202110475328A CN113194685A CN 113194685 A CN113194685 A CN 113194685A CN 202110475328 A CN202110475328 A CN 202110475328A CN 113194685 A CN113194685 A CN 113194685A
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- Prior art keywords
- flow
- heat exchange
- boss
- deflector
- surface enhanced
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20272—Accessories for moving fluid, for expanding fluid, for connecting fluid conduits, for distributing fluid, for removing gas or for preventing leakage, e.g. pumps, tanks or manifolds
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
The invention relates to the technical field of radiators, in particular to a spray cooling surface enhanced heat exchange fluid director which comprises a base, wherein a flow dispersing boss is arranged at the central part of the upper surface of the base, and the height of the flow dispersing boss is gradually reduced from the center to the periphery; the spray cooling surface enhanced heat exchange fluid director of the invention utilizes the flow dispersing boss to guide the liquid working medium sprayed on the flow dispersing boss and then flows to the surrounding liquid film flowing area, thereby promoting the flow of the liquid working medium in each liquid film flowing area, avoiding generating stagnation area, preventing the failure of local heat exchange, improving the heat exchange efficiency and the uniformity of heat exchange, simultaneously, through the blocking effect of the flow guiding pieces with a certain height, most of the high-speed working medium liquid drops impacting the upper surface of the base after rebounding impact the side surface of the flow guiding pieces for the second time, not only reducing the splashed liquid drops, but also increasing the actual heat exchange quantity.
Description
Technical Field
The invention relates to the technical field of radiators, in particular to a spray cooling surface enhanced heat exchange fluid director.
Background
The spray cooling heat transfer has the advantages of small heat transfer temperature difference, small working medium consumption, no boiling hysteresis, large heat flux and the like. The method is primarily applied to the fields of related industries, such as the problem of equipment damage possibly caused by a large amount of heat flow generated by the operation of a laser and the requirement of efficient and stable heat dissipation during the operation of a high-power electronic chip group.
For the field of spray cooling and efficient heat exchange, the flow condition of the heat exchange surface is very complicated. The flowing behavior of the high-speed atomized spray working medium on the heat exchange surface obviously influences the heat exchange effect, and the improvement of the convection heat transfer coefficient is greatly inspired. The flow area of the spray working medium on the heat exchange surface is divided into a central or local stagnation area and a peripheral liquid film diffusion flow area. For smooth surfaces, the flow pattern of the liquid film is difficult to predict and there is a high probability of stagnation zones at central or local locations. The liquid film in the stagnation area is difficult to flow, the thickness of the liquid film is increased, the working medium is difficult to diffuse all around, and the area at the position becomes a heat exchange failure area. In addition, for the spraying working condition of higher pressure, a large amount of liquid drops impact the heat exchange surface and then rebound and splash to the periphery of the heat source, which wastes working media and enables a large amount of working media to remain around the heat source. This is clearly a huge obstacle to heat exchange and flow, and solutions must therefore be taken to solve these problems.
At present, some researchers strengthen heat transfer by means of surface strengthening structures such as grooves and holes, but the purpose of the surface strengthening structures is to increase heat exchange area, and in fact, new stagnation areas such as grooves and holes at the central part can still be generated.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to solve the problems that in the prior art, the flowing rule of a liquid film on a heat exchange surface is difficult to predict during spray cooling, a stagnation area is easy to generate at the center or a local position, the liquid film in the stagnation area is difficult to flow, the thickness of the liquid film is increased, and working media are difficult to diffuse all around, so that the heat exchange of the area at the position is failed, the spray cooling surface enhanced heat exchange fluid director is provided.
The technical scheme adopted by the invention for solving the technical problems is as follows: a spray cooling surface enhanced heat exchange fluid director comprises a base, wherein a flow dispersing boss is arranged at the central part of the upper surface of the base, and the height of the flow dispersing boss is gradually reduced from the center to the periphery;
a plurality of flow deflectors are distributed on the upper surface of the base at intervals along the circumferential direction of the flow dispersing boss, and a liquid film flowing area is formed between every two adjacent flow deflectors.
The liquid working medium that utilizes the scattered class boss in this scheme can carry out the drainage to spraying on it, then flow to liquid film flow area all around, the flow of liquid working medium in each liquid film flow area has been promoted, thereby avoid producing stagnation area, prevent local heat transfer inefficacy, the homogeneity of heat exchange efficiency and heat transfer is improved, simultaneously through the effect of blockking of the water conservancy diversion piece of take the altitude, the side of water conservancy diversion piece is strikeed with the secondary to most behind the high-speed working medium liquid drop bounce that strikes the base upper surface, the liquid drop of splashing has not only been reduced, actual heat transfer volume has still been increased.
Further, the maximum height of the diffusing boss is smaller than the height of the guide vane.
Furthermore, the inner ends of the guide vanes are in contact with the peripheral edge of the flow dispersing boss; the liquid working medium flowing downwards on the surface of the diffusion boss can directly flow into the liquid film flowing area.
Furthermore, the flow conductivity coefficient of the flow dispersing boss is larger than the heat conductivity coefficient of the base; therefore, the influence on the integral heat transfer uniformity of the base due to the arrangement of the flow dispersing bosses can be reduced.
Furthermore, the flow deflectors are uniformly distributed along the circumferential direction of the flow dispersing boss.
Further, the guide vane is in a straight plate shape.
Furthermore, a plurality of second-stage flow deflectors are distributed on the upper surface of the base at intervals along the circumferential direction of the flow scattering boss, a second-stage liquid film flowing area is formed between every two adjacent second-stage flow deflectors, the second-stage flow deflectors are located on the outer sides of the flow deflectors, and the second-stage flow deflectors and the flow deflectors are mutually staggered in the circumferential direction of the flow scattering boss.
Furthermore, the guide vanes and the second-stage guide vanes are both straight plate-shaped.
Furthermore, the second-level flow deflectors are uniformly distributed along the circumferential direction of the flow dispersing boss.
Further, the guide vane is arc-shaped plate-shaped.
The invention has the beneficial effects that: the spray cooling surface enhanced heat exchange fluid director can guide the liquid working medium sprayed on the spray cooling surface enhanced heat exchange fluid director by utilizing the flow dispersing lug bosses and then flow to the peripheral liquid film flowing areas, so that the flow of the liquid working medium in each liquid film flowing area is promoted, a stagnation area is avoided, the local heat exchange failure is prevented, the heat exchange efficiency and the heat exchange uniformity are improved, meanwhile, most of high-speed working medium liquid drops impacting the upper surface of the base bounce back to impact the side surfaces of the flow guide plates for the second time through the blocking effect of the flow guide plates with a certain height, the splashed liquid drops are reduced, and the actual heat exchange amount is increased.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic top view of a spray cooling surface enhanced heat exchange deflector according to example 1 of the present invention;
FIG. 2 is a schematic cross-sectional view of a spray cooling surface enhanced heat exchange deflector in example 1 of the present invention;
FIG. 3 is a schematic view of a nozzle spraying on a base in example 1 of the present invention;
FIG. 4 is a schematic top view of a spray cooling surface enhanced heat exchange deflector according to example 2 of the present invention;
FIG. 5 is a schematic cross-sectional view of a spray cooling surface enhanced heat exchange deflector in example 2 of the present invention;
fig. 6 is a schematic top view of a spray cooling surface enhanced heat exchange deflector in example 3 of the present invention.
In the figure: 1. the spray nozzle comprises a base, 2, a flow dispersing boss, 3, a flow deflector, 4, a liquid film flowing area, 5, a second-stage flow deflector, 6, a second-stage liquid film flowing area, 7, a nozzle, 8 and a spray cone.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic diagrams illustrating the basic structure of the present invention only in a schematic manner, and thus show only the constitution related to the present invention, and directions and references (e.g., upper, lower, left, right, etc.) may be used only to help the description of the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
Example 1
As shown in fig. 1-3, a spray cooling surface enhanced heat exchange fluid director comprises a base 1, wherein a flow distribution boss 2 is arranged at the central part of the upper surface of the base 1, and the height of the flow distribution boss 2 gradually decreases from the center to the periphery;
a plurality of flow deflectors 3 are distributed on the upper surface of the base 1 at intervals along the circumferential direction of the flow dispersing boss 2, and a liquid film flowing area 4 is formed between every two adjacent flow deflectors 3.
The maximum height of the flow dispersing boss 2 is smaller than that of the flow deflector 3; so that the liquid medium impinging on the dispersion boss 2 flows around under the action of gravity.
The inner ends of the flow deflectors 3 are in contact with the peripheral edge of the flow dispersing boss 2; the liquid working medium flowing downwards on the surface of the diffusion boss 2 can directly flow into the liquid film flowing area 4, in the embodiment, the diffusion boss 2 can be a revolving body, the generatrix of the revolving body is a slant line, an inward-concave arc line or an outward-convex arc line, and the revolving body can be in a cone shape or a segment shape.
The flow conductivity coefficient of the flow dispersing boss 2 is greater than the heat conductivity coefficient of the base 1; thereby reducing the influence on the integral heat transfer uniformity of the base 1 caused by the arrangement of the flow dispersing bosses 2; for example, the material of the diffusion boss 2 is silver or pure copper, and specifically, the diffusion boss 2 is formed by fusing a material with a very large thermal conductivity coefficient, such as silver or pure copper, with the material of the base 1 after being melted; the base 1 and the flow deflector 3 are made of copper alloy, and the base 1 and the flow deflector 3 made of copper alloy have certain strength.
The flow deflectors 3 are uniformly distributed along the circumferential direction of the flow dispersing boss 2.
The base 1 in this embodiment specifically can paste the dress on waiting radiating heat source, dispels the heat and cools down to the heat source, and the outside of base 1 has the liquid collecting device for collect the liquid working medium that flows down on the base 1, for example, has the catch basin on the liquid collecting device, and the liquid working medium that flows down on the base 1 directly flows into the catch basin.
The flow deflector 3 is in a straight plate shape; thereby forming a direct current diffusing type structure on the surface of the base 1;
the working principle of the embodiment is as follows:
the general flow law of the spraying working medium is as follows: a spray cone 8 sprayed by a nozzle 7 covers the whole diffusion boss 2 and the liquid film flowing area 4, and the liquid working medium in the middle part flows to the liquid film flowing area 4 on the periphery under the drainage of the diffusion boss 2 and finally leaves the upper surface of the base 1;
the width of the liquid film flowing area 4 can be gradually increased along the radial direction of the diffusion boss 2 by adopting the straight plate-shaped flow deflector 3, the flow velocity of the liquid working medium is gradually reduced along with the expansion of the width of the liquid film flowing area 4, and the flow velocity is adapted to the rule that the density of the liquid working medium is gradually reduced from the radial direction of the diffusion boss 2, so that the uniformity of heat exchange can be improved.
Example 2
Example 2 differs from example 1 in that: a plurality of second-stage flow deflectors 5 are distributed on the upper surface of the base 1 at intervals along the circumferential direction of the diffusion boss 2, a second-stage liquid film flowing area 6 is formed between every two adjacent second-stage flow deflectors 5, the second-stage flow deflectors 5 are located on the outer sides of the flow deflectors 3, and the second-stage flow deflectors 5 and the flow deflectors 3 are mutually staggered in the circumferential direction of the diffusion boss 2; thereby forming a turbulent-dispersive-flow type structure on the surface of the base 1.
The flow deflector 3 and the second-stage flow deflector 5 are both straight plate-shaped.
The second-stage flow deflectors 3 are uniformly distributed along the circumferential direction of the flow dispersing boss 2.
In the embodiment, one end of the flow deflector 3 close to the diffusion boss 2 is the inner end of the flow deflector 3, and one end of the flow deflector 3 far away from the diffusion boss 2 is the outer end of the flow deflector 3; one end of the second-stage flow deflector 5 close to the diffusion boss 2 is the inner end of the second-stage flow deflector 5, and one end of the second-stage flow deflector 5 far away from the diffusion boss 2 is the outer end of the second-stage flow deflector 5.
The working principle of the embodiment is as follows:
the general flow law of the spraying working medium is as follows: a spray cone 8 sprayed by a nozzle 7 covers the whole diffusion boss 2 and the liquid film flowing area 4, and the liquid working medium in the middle part flows to the liquid film flowing area 4 on the periphery under the drainage of the diffusion boss 2 and finally leaves the upper surface of the base 1;
the design of the flow deflector 3 and the secondary flow deflector 5 is adopted, the sprayed liquid working medium flows around after impacting the flow dispersing boss 2, firstly flows into the liquid film flowing area 4 more averagely after being subjected to primary turbulence and split at the inner end of the flow deflector 3, and flows to the secondary flow deflector 5 in the liquid film flowing area 4, and then flows into the secondary liquid film flowing area 6 more averagely after being subjected to secondary turbulence and split after flowing to the inner end of the secondary flow deflector 5; thereby promoting the flowing mixing of the liquid working medium, damaging the liquid film in the process, reducing the thickness of the liquid film and enhancing the heat transfer;
the width of the liquid film flowing area 4 is gradually increased outwards along the radial direction of the diffusion boss 2, the flow velocity of the liquid working medium is gradually reduced along with the increase of the width of the liquid film flowing area 4, and the flow velocity is adapted to the rule that the density of the liquid working medium is gradually reduced outwards along the radial direction of the diffusion boss 2, so that the uniformity of heat exchange can be improved; the width of the secondary liquid film flowing area 6 is gradually increased along the radial direction of the diffusion boss 2, the flow velocity of the liquid working medium is gradually reduced along with the increase of the width of the secondary liquid film flowing area 6, and the flow velocity is adapted to the rule that the density of the liquid working medium is gradually reduced from the radial direction of the diffusion boss 2, so that the uniformity of heat exchange can be improved.
Example 3
Example 3 differs from example 1 in that: the flow deflector 3 is arc-shaped plate-shaped; thereby forming a delay flow dispersing structure;
the flow deflector 3 in the embodiment is arc-shaped plate-shaped, so that the flow distance of the liquid working medium in the liquid film flow area 4 can be prolonged, excessive liquid working medium can be fully subjected to heat exchange, and the liquid heat exchanger is suitable for occasions with large working medium flow.
In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that numerous changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A spray cooling surface enhanced heat exchange fluid director is characterized in that: the device comprises a base (1), wherein a flow dispersing boss (2) is arranged at the central part of the upper surface of the base (1), and the height of the flow dispersing boss (2) gradually becomes lower from the center to the periphery;
a plurality of flow deflectors (3) are distributed on the upper surface of the base (1) at intervals along the circumferential direction of the flow dispersing boss (2), and a liquid film flowing area (4) is formed between every two adjacent flow deflectors (3).
2. The spray cooled surface enhanced heat exchange deflector of claim 1, wherein: the maximum height of the flow dispersing boss (2) is smaller than the height of the flow deflector (3).
3. The spray cooled surface enhanced heat exchange deflector of claim 1, wherein: the inner ends of the flow deflectors (3) are in contact with the peripheral edge of the flow dispersing boss (2).
4. The spray cooled surface enhanced heat exchange deflector of claim 1, wherein: the flow conductivity coefficient of the flow dispersing boss (2) is larger than the heat conductivity coefficient of the base (1).
5. The spray cooled surface enhanced heat exchange deflector of claim 1, wherein: the flow deflectors (3) are uniformly distributed along the circumferential direction of the flow dispersing boss (2).
6. The spray cooled surface enhanced heat exchange deflector of any one of claims 1-5, wherein: the flow deflector (3) is in a straight plate shape.
7. The spray cooled surface enhanced heat exchange deflector of any one of claims 1-5, wherein: a plurality of second-stage flow deflectors (5) are distributed on the upper surface of the base (1) at intervals along the circumferential direction of the flow scattering boss (2), a second-stage liquid film flowing area (6) is formed between every two adjacent second-stage flow deflectors (5), the second-stage flow deflectors (5) are located on the outer sides of the flow deflectors (3), and the second-stage flow deflectors (5) and the flow deflectors (3) are mutually staggered in the circumferential direction of the flow scattering boss (2).
8. The spray cooled surface enhanced heat exchange deflector of any one of claims 1-5, wherein: the flow deflector (3) and the second-stage flow deflector (5) are both straight plate-shaped.
9. The spray cooled surface enhanced heat exchange deflector of claim 8, wherein: the secondary flow deflectors (3) are uniformly distributed along the circumferential direction of the flow dispersing boss (2).
10. The spray cooled surface enhanced heat exchange deflector of any one of claims 1-5, wherein: the flow deflector (3) is arc-shaped plate-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110475328.9A CN113194685B (en) | 2021-04-29 | 2021-04-29 | Spray cooling surface enhanced heat exchange fluid director |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110475328.9A CN113194685B (en) | 2021-04-29 | 2021-04-29 | Spray cooling surface enhanced heat exchange fluid director |
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| CN113194685A true CN113194685A (en) | 2021-07-30 |
| CN113194685B CN113194685B (en) | 2023-01-17 |
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| CN210321342U (en) * | 2019-06-28 | 2020-04-14 | 浙江大学 | Printed circuit board heat exchanger with composite flow guide structure |
| CN111356343A (en) * | 2020-03-11 | 2020-06-30 | 深圳绿色云图科技有限公司 | Cooling liquid distribution device and liquid cooling cabinet |
| CN112074171A (en) * | 2020-09-22 | 2020-12-11 | 魏绍国 | Heat dissipation device for power electronics |
| CN112654217A (en) * | 2020-12-22 | 2021-04-13 | 四川大学 | Close-open gradually-expanding microchannel liquid cooling plate |
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2021
- 2021-04-29 CN CN202110475328.9A patent/CN113194685B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160113151A1 (en) * | 2014-10-17 | 2016-04-21 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Cooling device for electronic components using liquid coolant |
| CN105043154A (en) * | 2015-09-01 | 2015-11-11 | 无锡隆达金属材料有限公司 | Efficient heat-conducting condenser pipe |
| CN106643262A (en) * | 2016-12-20 | 2017-05-10 | 江苏萃隆精密铜管股份有限公司 | Efficient heat transfer pipe with evaporating function and condensing function |
| CN107179013A (en) * | 2017-05-09 | 2017-09-19 | 华北电力大学 | A kind of self-loopa high-efficiency heat pipe of non-unidirectional intermediate heat point protection |
| CN109219326A (en) * | 2018-11-16 | 2019-01-15 | 广东工业大学 | A kind of spraying radiator |
| CN109548381A (en) * | 2018-12-21 | 2019-03-29 | 华中科技大学 | There is the radiator of protrusion on a kind of radial fin surface |
| CN210321342U (en) * | 2019-06-28 | 2020-04-14 | 浙江大学 | Printed circuit board heat exchanger with composite flow guide structure |
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| CN112654217A (en) * | 2020-12-22 | 2021-04-13 | 四川大学 | Close-open gradually-expanding microchannel liquid cooling plate |
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| CN113194685B (en) | 2023-01-17 |
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