CN109801887B - Fractal micro-channel heat exchanger - Google Patents
Fractal micro-channel heat exchanger Download PDFInfo
- Publication number
- CN109801887B CN109801887B CN201910205990.5A CN201910205990A CN109801887B CN 109801887 B CN109801887 B CN 109801887B CN 201910205990 A CN201910205990 A CN 201910205990A CN 109801887 B CN109801887 B CN 109801887B
- Authority
- CN
- China
- Prior art keywords
- fractal
- fluid
- heat exchanger
- unit channels
- branch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012530 fluid Substances 0.000 claims abstract description 71
- 239000000758 substrate Substances 0.000 claims abstract description 43
- 239000007788 liquid Substances 0.000 claims abstract description 41
- 230000001154 acute effect Effects 0.000 claims abstract description 13
- 239000007769 metal material Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 238000013461 design Methods 0.000 description 4
- 229910003460 diamond Inorganic materials 0.000 description 4
- 239000010432 diamond Substances 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
Landscapes
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a fractal micro-channel heat exchanger, wherein N is arranged on a substrate 0 Group sector fractal unit channels, N 0 The group sector fractal unit channels are uniformly distributed in a circumferential array with respect to the center of the substrate, N 0 The group sector fractal unit channels are radially arranged on the substrate, N 0 The outlet ends of the group sector-shaped fractal unit channels are communicated with the liquid collecting ring groove, fluid enters the liquid collecting ring groove from the fluid inlet after passing through the fractal unit channels, finally flows out from the fluid outlet, and N 0 The group sector fractal unit channels cover the whole substrate, fluid can flow in all directions in the heat exchanger, and heat in the heat exchanger is taken away while flowing, so that uniform heat exchange in the heat exchanger is realized, local high temperature is avoided, and the service life of an electronic chip is prolonged; the fluid encounters smaller flow resistance when turning at an acute angle, so that the flow resistance of the fluid in the channel is reduced; the heat exchange efficiency of the heat exchanger is improved due to the more branch pipelines; the branch passages in the heat radiating unit can be arranged in a random close-packed manner, so that the heat exchange efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of heat exchange equipment, in particular to a fractal micro-channel heat exchanger.
Background
In recent years, with the continuous development of very large scale integrated circuits, the power per unit volume of a chip is larger and larger, and the heat dissipation requirement of the chip is increased; because the internal design of the chip is precise, the service life of the chip can be greatly reduced in any local overheating zone, and the heat dissipation uniformity requirement of the heat exchanger is also improved.
One of the most commonly used heat dissipation devices in the field of chip heat dissipation is a microchannel heat exchanger that uses liquid to cool down. The microchannel heat exchanger is composed of a large number of straight microchannels, the width of which varies from tens to thousands of micrometers. The narrow channels greatly increase the contact area of the fluid and the heat exchanger; simultaneously, the friction between the fluid and the wall surface is increased, and the pressure drop of the heat exchanger is also increased. Therefore, it is one of the design directions of the heat exchanger to improve the heat exchange efficiency without greatly improving the pressure drop.
The fractal structure is an effective design for improving heat exchange capacity under the condition of ensuring stable increase of pressure drop. The design idea of the fractal micro-channel heat exchanger is to divide a large-diameter channel into a plurality of small-diameter secondary channels in each stage at a certain branching angle. Because the heat exchange coefficient in the channel is inversely proportional to the pipe diameter in the laminar flow process, the heat exchange coefficient of the small-diameter channel is larger than that of the large-diameter channel, so that the fractal micro-channel heat exchanger has higher heat exchange capacity under the same heat exchange area and heat exchange temperature difference. The existing fractal micro-channel heat exchanger mainly comprises two types: right-angle heat exchangers and diamond heat exchangers.
The first type is a right-angle fractal micro-channel heat exchanger, and the secondary channel and the upper channel are in right-angle shape; a fractal micro-channel heat exchanger as proposed in Zheng Ping (y. Chen, p. Cheng, an experimental investigation on the thermal efficiency of fractal tree-like microchannel nets, int. J. Heat Mass Transfer 32 (2005) 931-938) (see fig. 1), each stage channel is in a split-two form, and the secondary channels are at right angles to the upper stage channels. Because the refrigerant fluid encounters larger flow resistance when passing through the right angle turn, the pressure drop of the fluid in the right angle fractal micro-channel heat exchanger is larger, and the heat exchange efficiency is reduced.
The other type is a diamond fractal micro-channel heat exchanger, wherein the main channel and the secondary channels of the diamond fractal micro-channel heat exchanger have symmetrical structures, and the main channel is returned to the main channel after being divided into multiple levels of secondary channels. Such as a fractal micro-channel heat exchanger (application number: 201711046682. X), the main channel is continuously divided into two stages of sub-channels, and then connected with the two stages of sub-channels, and returns to the main channel to form a symmetrical structure. The main channels are too many, and the heat exchange effect is uneven.
Both heat exchangers cannot densely arrange the micro-channels on the whole substrate due to the specific fractal structure. The heat exchange efficiency of the fractal heat exchanger also has a certain lifting space, so that the novel fractal micro-channel heat exchanger is required to be invented aiming at the problems of large right-angle pressure drop and uneven heat exchange in the existing fractal micro-channel heat exchanger, so that the heat exchange is ensured to be even and the heat exchange capacity is improved as much as possible.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to solve the problems of large right-angle pressure drop and uneven heat exchange in the existing fractal micro-channel heat exchanger, the fractal micro-channel heat exchanger is provided.
The technical scheme adopted for solving the technical problems is as follows: a fractal micro-channel heat exchanger comprises a substrate and an upper cover plate, wherein the upper cover plate is arranged on the substrate in a covering manner and is in sealing fit with the substrate, a fluid inlet is formed in the center position of the upper cover plate, and N is formed in the substrate 0 Group sector fractal unit channels, N 0 The group sector fractal unit channels are uniformly distributed in a circumferential array with respect to the center of the substrate, N 0 The inlet ends of the group sector fractal unit channels are communicated with each other and are communicated with the fluid inlet, a liquid collecting ring groove is formed in the base plate, and the liquid collecting ring groove surrounds N 0 Group sector fractal unit channels, N 0 The outlet ends of the group sector fractal unit channels are communicated with the liquid collecting ring groove, the base plate is provided with a fluid outlet, and the fluid outlet is communicated with the liquid collecting ring groove.
The fractal micro-channel heat exchanger of the invention is provided with N on a substrate 0 Group sector fractal unit channels, N 0 The group sector fractal unit channels are uniformly distributed in a circumferential array with respect to the center of the substrate, N 0 The group sector fractal unit channels are radially arranged on the substrate, N 0 The outlet ends of the group sector-shaped fractal unit channels are communicated with the liquid collecting ring groove, fluid enters the liquid collecting ring groove from the fluid inlet after passing through the fractal unit channels, finally flows out from the fluid outlet, and N 0 The group sector-shaped fractal unit channels cover the whole substrate, and fluid can flow to all directions in the heat exchangerAnd heat in the heat exchanger is taken away when flowing, so that uniform heat exchange in the heat exchanger is realized, local high temperature is avoided, and the service life of the electronic chip is prolonged.
The right-angle fractal heat exchanger, the secondary channel and the upper channel are in right-angle shape, and because the refrigerant fluid encounters larger flow resistance when passing through right-angle turns, the pressure drop of the fluid in the existing fractal heat exchanger is larger, and in order to reduce the pressure drop of the fluid in the fractal heat exchanger, each group of fan-shaped fractal unit channels comprises a total branch pipe, the total branch pipe is communicated with a fluid inlet and a liquid collecting ring groove, and one side of the total branch pipe is provided with N 1 Branch pipeline N 1 The branch pipelines are sequentially arranged from the fluid inlet to the liquid collecting ring groove, N 1 The branch pipelines are arranged in parallel at equal intervals, branch channels in the heat radiating unit can be arranged in a close manner at will, so that the heat exchange efficiency is greatly improved, and N 1 One end of each branched pipeline is communicated with the main branch pipeline, the other end of each branched pipeline is communicated with the liquid collecting ring groove, an included angle between one side of each branched pipeline, which is close to the liquid collecting ring groove, and the main branch pipeline is an acute angle theta, an acute angle is adopted as a branched angle in the fan-shaped fractal unit channel, and the flow resistance of fluid when the fluid turns through the acute angle is small, so that the flow resistance of the fluid in the channel is reduced; and the forked pipelines cover the whole substrate, and more forked pipelines improve the heat exchange efficiency of the heat exchanger.
Specifically, the depth of the total branch pipe is equal to the depths of a plurality of branch pipes, the widths of a plurality of branch pipes are equal, and the width of the total branch pipe is D 0 The width of the branch pipeline is D 1 ，D 1 ＝D 0 Beta, beta represents the fractal width ratio, when the fluid is laminar: beta=n 1 -3/2 When the fluid is turbulent: beta=n 1 -7/6 . According to the Murray principle:wherein N1 is the total number of branches, and i is the number of stages of the branches; when the channel fluid is laminar, Δ= 3, β=n 1 -△/2 Substituting Δ= 3 into β=n 1 -△/2 Deriving β=n 1 -3/2 The method comprises the steps of carrying out a first treatment on the surface of the When the channel fluid is turbulent, Δ= 7/3, β=n 1 -△/2 Substituting Δ= 7/3 into β=n 1 -△/2 Deriving β=n 1 -7/6 。
The total length of the total branch pipe and the branch pipes in each group of fan-shaped fractal unit channels is Ltot The length of the total branch pipe is R, the distance between two adjacent branch pipes is J, and the distance between the ith branch pipe and the first branch pipe from the fluid inlet is J i Wherein:
the included angle between one side of the branch pipeline, which is close to the liquid collecting ring groove, and the total branch pipeline is an acute angle theta, the distance between two adjacent branch pipelines is J, and the distance between the ith branch pipeline and the first branch pipeline from the fluid inlet is J i ，N 0 Is the number of groups of the sector-shaped fractal unit channels, each group of the sector-shaped fractal unit channels is provided with a total branch pipe, and the number of the branch pipes is N in total 0 ，N 1 The number of the branch pipelines is not less than 1, and the following mathematical relation is obtained according to the geometric relation:
N 1 ＝Rsinθ/J. (1-2)
N 0 ＝360/θ (1-3)
substituting the formula (1-1) and the formula (1-3) into the formula (1-4), and obtaining the following relation after finishing:
specifically, since the sector-shaped fractal unit channel is sector-shaped, a plurality of sectors can form a circle, the coverage rate of the sector-shaped fractal unit channel used on a circular substrate is high, the shape and the size of the substrate and the upper cover plate are identical, and the substrate and the upper cover plate are both circular.
Specifically, in order to accelerate the heat exchange efficiency of the heat exchanger, the material of the substrate is a metal material, and the heat transfer efficiency of the metal material is higher.
The fractal micro-channel heat exchanger has the beneficial effects that N is arranged on the substrate 0 Group sector fractal unit channels, N 0 The group sector fractal unit channels are uniformly distributed in a circumferential array with respect to the center of the substrate, N 0 The group sector fractal unit channels are radially arranged on the substrate, N 0 The outlet ends of the group sector-shaped fractal unit channels are communicated with the liquid collecting ring groove, fluid enters the liquid collecting ring groove from the fluid inlet after passing through the fractal unit channels, finally flows out from the fluid outlet, and N 0 The group sector fractal unit channels cover the whole substrate, fluid can flow in all directions in the heat exchanger, and heat in the heat exchanger is taken away while flowing, so that uniform heat exchange in the heat exchanger is realized, local high temperature is avoided, and the service life of an electronic chip is prolonged; the acute angle is adopted as a bifurcation angle in the sector fractal unit channel, so that the flow resistance of the fluid is smaller when the fluid turns through the acute angle, and the flow resistance of the fluid in the channel is reduced; the forked pipelines cover the whole substrate, and more forked pipelines improve the heat exchange efficiency of the heat exchanger; the branch passages in the heat radiating unit can be arranged in a random close-packed manner, so that the heat exchange efficiency is greatly improved.
Drawings
The invention will be further described with reference to the drawings and examples.
Fig. 1 is a top view of a right-angle fractal heat exchanger substrate;
FIG. 2 is a top view of a diamond heat exchanger substrate;
FIG. 3 is a three-dimensional schematic of the present invention;
FIG. 4 is a three-dimensional schematic of a substrate in accordance with the present invention;
FIG. 5 is a top view of a substrate in the present invention;
fig. 6 is a two-dimensional schematic of a fan-shaped fractal unit channel in the present invention;
FIG. 7 shows the angle θ between the side of the branch pipe close to the liquid collecting ring groove and the total branch pipe and the total length of the total branch pipe and the branch pipes in each group of fan-shaped fractal unit channels in embodiment 1 of the present invention Lt A graph of the relationship between ot;
FIG. 8 is a graph showing the angle θ between the side of the branch pipe close to the liquid collecting ring groove and the total branch pipe and the total length of the total branch pipe and the branch pipes in each group of fan-shaped fractal unit channels in embodiment 2 of the present invention Lt A graph of the relationship between ot;
FIG. 9 is a graph showing the angle θ between the side of the branch pipe close to the liquid collecting ring groove and the total branch pipe and the total length of the total branch pipe and the branch pipes in each group of fan-shaped fractal unit channels in embodiment 3 of the present invention Ltot A graph of the relationship between the two.
In the figure: 1. the device comprises a base plate, 1-1 parts of fan-shaped fractal unit channels, 1-1-1 parts of total branch pipes, 1-1-2 parts of branch pipes, 1-2 parts of liquid collecting ring grooves, 1-3 parts of fluid outlets, 2 parts of upper cover plates and 2-1 parts of fluid inlets.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
The fractal micro-channel heat exchanger as shown in fig. 3 and 4 comprises a substrate 1 and an upper cover plate 2, wherein the upper cover plate 2 is arranged on the substrate 1 in a covering manner and is in sealing fit with the substrate 1, the shape and the size of the substrate 1 and the upper cover plate 2 are identical, the substrate 1 and the upper cover plate 2 are circular, and the substrate 1 is made of metal materials. The center of the upper cover plate 2 is provided with a fluid inlet 2-1, and the base plate 1 is provided with N 0 Group sector fractal unit channels 1-1, N 0 The group sector fractal unit channels 1-1 are uniformly distributed in a circumferential array about the center of the substrate 1, N 0 The inlet ends of the group sector-shaped fractal unit channels 1-1 are communicated with each other and are communicated with the fluid inlet 2-1, and a collector is arranged on the base plate 1Liquid ring groove 1-2, liquid collecting ring groove 1-2 surrounds N 0 Group sector fractal unit channels 1-1, N 0 The outlet ends of the group fan-shaped fractal unit channels 1-1 are communicated with the liquid collecting ring groove 1-2, the base plate 1 is provided with a fluid outlet 1-3, and the fluid outlet 1-3 is communicated with the liquid collecting ring groove 1-2.
The fractal micro-channel heat exchanger of the invention is provided with N on a substrate 1 0 Group sector fractal unit channels 1-1, N 0 The group sector fractal unit channels 1-1 are uniformly distributed in a circumferential array about the center of the substrate 1, N 0 The group sector-shaped fractal unit channels 1-1 are radially arranged on the substrate 1, N 0 The outlet ends of the group fan-shaped fractal unit channels 1-1 are communicated with the liquid collecting ring grooves 1-2, fluid enters the liquid collecting ring grooves 1-2 from the fluid inlet 2-1 after passing through the fractal unit channels and finally flows out from the fluid outlet 1-3, and N 0 The group sector-shaped fractal unit channels 1-1 cover the whole substrate 1, fluid can flow in all directions in the heat exchanger, and heat in the heat exchanger is taken away while flowing, so that uniform heat exchange in the heat exchanger is realized, local high temperature is avoided, and the service life of an electronic chip is prolonged.
The right-angle fractal heat exchanger, the secondary channel and the upper channel are right-angle, because the refrigerant fluid encounters larger flow resistance when passing through right-angle turns, the pressure drop of the fluid in the existing fractal heat exchanger is larger, in order to reduce the pressure drop of the fluid in the fractal heat exchanger, each group of fan-shaped fractal unit channels 1-1 comprises a total branch pipe 1-1, the total branch pipe 1-1-1 is communicated with a fluid inlet 2-1 and a liquid collecting ring groove 1-2, and one side of the total branch pipe 1-1-1 is provided with N 1 Branch lines 1-1-2, N 1 The branch pipelines 1-1-2 are arranged in sequence from the fluid inlet 2-1 to the liquid collecting ring groove 1-2, as shown in fig. 5 and 6, N 1 The branch pipelines 1-1-2 are arranged in parallel at equal intervals, the branch channels in the radiating unit can be arranged in a close manner at will, the heat exchange efficiency is greatly improved, and N 1 One end of each branched pipeline 1-1-2 is communicated with the total branch pipeline 1-1-1, the other end is communicated with the liquid collecting ring groove 1-2, an included angle between one side of the branched pipeline 1-1-2, which is close to the liquid collecting ring groove 1-2, and the total branch pipeline 1-1 is an acute angle theta, an acute angle is adopted in the fan-shaped fractal unit channel 1-1 as a branching angle, and fluid encounters when turning at the acute angleThe dynamic resistance is small, so that the flow resistance of the fluid in the channel is reduced; and the branch pipelines 1-1-2 cover the whole substrate 1, and more branch pipelines 1-1-2 improve the heat exchange efficiency of the heat exchanger.
The depth of the main branch pipe 1-1-1 is equal to the depth of the plurality of branch pipes 1-1-2, the width of the plurality of branch pipes 1-1-2 is equal, and the width of the main branch pipe is D 0 The width of the branch pipeline 1-1-2 is D 1 D1=d0β, β represents the fractal width ratio when the fluid is laminar: beta=n 1 -3/2 When the fluid is turbulent: beta=n 1 -7/6 . According to the Murray principle:wherein N1 is the total number of branches, and i is the number of stages of the branches; when the channel fluid is laminar, Δ= 3, β=n 1 -△/2 Substituting Δ= 3 into β=n 1 -△/2 Deriving β=n 1 -3/2 The method comprises the steps of carrying out a first treatment on the surface of the When the channel fluid is turbulent, Δ= 7/3, β=n 1 -△/2 Substituting Δ= 7/3 into β=n 1 -△/2 Deriving β=n 1 -7/6 。
The total length of the total branch pipe 1-1-1 and the plurality of branch pipes 1-1-2 in each group of fan-shaped fractal unit channels 1-1 is Ltot The length of the total branch pipe 1-1-1 is R, the distance between two adjacent branch pipes 1-1-2 is J, and the distance between the ith branch pipe 1-1-2 and the first branch pipe 1-1-2 from the fluid inlet 2-1 is J i Wherein:
the included angle between one side of the branch pipeline 1-1-2 close to the liquid collecting ring groove 1-2 and the main branch pipeline 1-1 is an acute angle theta, the distance between two adjacent branch pipelines 1-1-2 is J, and the distance between the ith branch pipeline 1-1-2 and the first branch pipeline 1-1-2 from the fluid inlet 2-1 is J i ，N 0 Is the group number of the sector-shaped fractal unit channels 1-1, and each group of the sector-shaped fractal unit channels 1-1 is provided with one pieceTotal branch pipes 1-1-1, in short, the number of the branch pipes is N 0 ，N 1 The number of the branch pipelines 1-1-2 is not less than 1, and the following mathematical relationship is obtained according to the geometric relationship:
N 1 ＝Rsinθ/J. (1-2)
N 0 ＝360/θ (1-3)
substituting the formula (1-1) and the formula (1-3) into the formula (1-4), and obtaining the following relation after finishing:
example 1:
the angle range of the acute angle theta is between (0, 90), the circular heat exchanger base plate 1 is provided with specifications, R is set to 10mm, J is set to 0.5mm, and after the arbitrary value of the angle theta between 0 DEG and 90 DEG is calculated through the formula, the total length change curve graph of the total branch pipe 1-1-1 and the plurality of branch pipes 1-1-2 in each group of fan-shaped fractal unit channels 1-1; as can be seen from FIG. 7, when θ is between 60 ° and 90 °, the total length of the total branch pipe 1-1-1 and the plurality of branch pipes 1-1-2 in each group of fan-shaped fractal unit channels 1-1 is longer, the heat exchange efficiency of the heat exchanger is better, when the fan-shaped fractal unit channels 1-1 have 5 groups, the included angle between the side of the branch pipe 1-1-2 in each group of fan-shaped fractal unit channels 1-1, which is close to the liquid collecting ring groove 1-2, and the total branch pipe 1-1-1 is 75 °, and when the number of the branch pipes 1-1-2 in each group of fan-shaped fractal unit channels 1-1 is 19, the total length of the total branch pipe 1-1-1 and the plurality of branch pipes 1-1-2 in each group of fan-shaped fractal unit channels 1-1 is longest, and the heat exchange efficiency of the heat exchanger is highest.
Example 2:
setting R as 15mm, setting J as 0.5mm, calculating the arbitrary value of θ between 0 and 90 degrees through the formula, and calculating the total length change curve graph of the total branch pipe 1-1-1 and the plurality of branch pipes 1-1-2 in each group of fan-shaped fractal unit channels 1-1; as can be seen from FIG. 8, when θ is between 60 ° and 90 °, the total length of the total branch pipe 1-1-1 and the plurality of branch pipes 1-1-2 in each group of fan-shaped fractal unit channels 1-1 is longer, the heat exchange efficiency of the heat exchanger is better, when the fan-shaped fractal unit channels 1-1 have 5 groups, the included angle between the side of the branch pipe 1-1-2 in each group of fan-shaped fractal unit channels 1-1, which is close to the liquid collecting ring groove 1-2, and the total branch pipe 1-1-1 is 75 °, and when the number of the branch pipes 1-1-2 in each group of fan-shaped fractal unit channels 1-1 is 19, the total length of the total branch pipe 1-1-1 and the plurality of branch pipes 1-1-2 in each group of fan-shaped fractal unit channels 1-1 is longest, and the heat exchange efficiency of the heat exchanger is highest.
Example 3:
setting R as 10mm, setting J as 0.4mm, calculating the arbitrary value of θ between 0 and 90 degrees through the formula, and calculating the total length change curve graph of the total branch pipe 1-1-1 and the plurality of branch pipes 1-1-2 in each group of fan-shaped fractal unit channels 1-1; as can be seen from fig. 9, when θ is between 60 ° and 90 °, the total length of the total branch pipe 1-1-1 and the plurality of branch pipes 1-1-2 in each group of fan-shaped fractal unit channels 1-1 is longer, the heat exchange efficiency of the heat exchanger is better, when the fan-shaped fractal unit channels 1-1 have 5 groups, the included angle between the side of the branch pipe 1-1-2 in each group of fan-shaped fractal unit channels 1-1, which is close to the liquid collecting ring groove 1-2, and the total branch pipe 1-1-1 is 75 °, and when the number of the branch pipes 1-1-2 in each group of fan-shaped fractal unit channels 1-1 is 19, the total length of the total branch pipe 1-1-1 and the plurality of branch pipes 1-1-2 in each group of fan-shaped fractal unit channels 1-1 is longest, and the heat exchange efficiency of the heat exchanger is highest.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (3)
1. The utility model provides a fractal microchannel heat exchanger, includes base plate (1) and upper cover plate (2), upper cover plate (2) lid is established on base plate (1) to with base plate (1) sealing fit, fluid entry (2-1) have been seted up in the central point department of upper cover plate (2), its characterized in that: the substrate (1) is provided with N 0 Group sector fractal unit channels (1-1), N 0 The group sector fractal unit channels (1-1) are uniformly distributed in a circumferential array with respect to the center of the substrate (1), N 0 The inlet ends of the group sector-shaped fractal unit channels (1-1) are communicated with each other and are communicated with the fluid inlet (2-1), the base plate (1) is provided with a liquid collecting ring groove (1-2), and the liquid collecting ring groove (1-2) surrounds N 0 Group sector fractal unit channels (1-1), N 0 The outlet ends of the group sector fractal unit channels (1-1) are communicated with the liquid collecting ring groove (1-2), the base plate (1) is provided with a fluid outlet (1-3), the fluid outlet (1-3) is communicated with the liquid collecting ring groove (1-2),
each group of sector-shaped fractal unit channels (1-1) comprises a total branch pipe (1-1-1), the total branch pipe (1-1-1) is communicated with a fluid inlet (2-1) and a liquid collecting ring groove (1-2), and one side of the total branch pipe (1-1) is provided with N 1 Branched pipelines (1-1-2), N 1 The branch pipelines (1-1-2) are sequentially arranged from the fluid inlet (2-1) to the liquid collecting ring groove (1-2), N 1 The branch pipelines (1-1-2) are arranged in parallel and at equal intervals, N 1 One end of each branch pipeline (1-1-2) is communicated with the main branch pipeline (1-1) and the other end is communicated with the liquid collecting ring groove (1-2), the included angle between one side of the branch pipeline (1-1-2) close to the liquid collecting ring groove (1-2) and the main branch pipeline (1-1) is an acute angle theta,
the total length of a total branch pipe (1-1-1) and a plurality of branch pipes (1-1-2) in each group of fan-shaped fractal unit channels (1-1) is Ltot, the length of the total branch pipe (1-1-1) is R, the distance between two adjacent branch pipes (1-1-2) is J, and the distance between an ith branch pipe (1-1-2) and a first branch pipe (1-1-2) from a fluid inlet (2-1) is Ji, wherein:
2. the fractal micro-channel heat exchanger of claim 1, wherein: the shape and the size of the base plate (1) and the upper cover plate (2) are identical, the base plate (1) and the upper cover plate (2) are round,
the depth of the total branch pipe (1-1-1) is equal to the depth of a plurality of branch pipes (1-1-2), the width of a plurality of branch pipes (1-1-2) is equal, and the width of the total branch pipe (1-1-1) is D 0 The width of the branch pipeline (1-1-2) is D 1 ，D 1 ＝D 0 Beta, beta represents the fractal width ratio, when the fluid is laminar: beta=n 1 -3/2 When the fluid is turbulent: beta=n 1 -7/6 。
3. The fractal micro-channel heat exchanger of claim 1, wherein: the material of the substrate (1) is a metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910205990.5A CN109801887B (en) | 2019-03-19 | 2019-03-19 | Fractal micro-channel heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910205990.5A CN109801887B (en) | 2019-03-19 | 2019-03-19 | Fractal micro-channel heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109801887A CN109801887A (en) | 2019-05-24 |
| CN109801887B true CN109801887B (en) | 2023-10-31 |
Family
ID=66563481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910205990.5A Active CN109801887B (en) | 2019-03-19 | 2019-03-19 | Fractal micro-channel heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109801887B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101341592A (en) * | 2005-12-20 | 2009-01-07 | 昭和电工株式会社 | Semiconductor module |
| CN101394730A (en) * | 2008-04-01 | 2009-03-25 | 北京航空航天大学 | Split heat radiator |
| CN102034773A (en) * | 2010-11-08 | 2011-04-27 | 东南大学 | Configurational tree-shaped heat pipe radiator |
| CN103594430A (en) * | 2013-10-25 | 2014-02-19 | 上海交通大学 | Micro-channel radiator for dissipating heat of power electronic device |
| CN103996665A (en) * | 2014-06-09 | 2014-08-20 | 电子科技大学 | Enhanced heat dissipation device with pulsating flows and wavy-wall microchannels adopted |
| CN204497212U (en) * | 2015-02-05 | 2015-07-22 | 哈尔滨工程大学 | With the impact type water-cooled chip radiator of the fractal micro-channel of bionic plant vein |
| CN107768334A (en) * | 2017-11-23 | 2018-03-06 | 贵州大学 | Bifurcated passage radiator based on leaf vein topological structure |
| CN107941057A (en) * | 2017-10-31 | 2018-04-20 | 上海交通大学 | Heat exchanger with bionical fractal structure |
| CN108172557A (en) * | 2018-02-07 | 2018-06-15 | 桂林电子科技大学 | A kind of spider net type fluid channel radiator |
| CN109103157A (en) * | 2018-08-28 | 2018-12-28 | 电子科技大学 | One kind imitating quincunx micro-channel heat sink cold plate and its radiator |
| CN109742062A (en) * | 2019-03-04 | 2019-05-10 | 江苏唯益换热器有限公司 | Bionical point of shape plate heat exchanger |
| CN209434175U (en) * | 2019-03-19 | 2019-09-24 | 江苏唯益换热器有限公司 | Fractal micro-channel heat exchanger |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2772717B1 (en) * | 2011-10-28 | 2019-02-27 | Kyocera Corporation | Channel member, heat exchanger, and semiconductor unit including the same |
-
2019
- 2019-03-19 CN CN201910205990.5A patent/CN109801887B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101341592A (en) * | 2005-12-20 | 2009-01-07 | 昭和电工株式会社 | Semiconductor module |
| CN101394730A (en) * | 2008-04-01 | 2009-03-25 | 北京航空航天大学 | Split heat radiator |
| CN102034773A (en) * | 2010-11-08 | 2011-04-27 | 东南大学 | Configurational tree-shaped heat pipe radiator |
| CN103594430A (en) * | 2013-10-25 | 2014-02-19 | 上海交通大学 | Micro-channel radiator for dissipating heat of power electronic device |
| CN103996665A (en) * | 2014-06-09 | 2014-08-20 | 电子科技大学 | Enhanced heat dissipation device with pulsating flows and wavy-wall microchannels adopted |
| CN204497212U (en) * | 2015-02-05 | 2015-07-22 | 哈尔滨工程大学 | With the impact type water-cooled chip radiator of the fractal micro-channel of bionic plant vein |
| CN107941057A (en) * | 2017-10-31 | 2018-04-20 | 上海交通大学 | Heat exchanger with bionical fractal structure |
| CN107768334A (en) * | 2017-11-23 | 2018-03-06 | 贵州大学 | Bifurcated passage radiator based on leaf vein topological structure |
| CN108172557A (en) * | 2018-02-07 | 2018-06-15 | 桂林电子科技大学 | A kind of spider net type fluid channel radiator |
| CN109103157A (en) * | 2018-08-28 | 2018-12-28 | 电子科技大学 | One kind imitating quincunx micro-channel heat sink cold plate and its radiator |
| CN109742062A (en) * | 2019-03-04 | 2019-05-10 | 江苏唯益换热器有限公司 | Bionical point of shape plate heat exchanger |
| CN209434175U (en) * | 2019-03-19 | 2019-09-24 | 江苏唯益换热器有限公司 | Fractal micro-channel heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109801887A (en) | 2019-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20140182828A1 (en) | Heat-Exchange Apparatus | |
| CN111415915B (en) | Heat radiation structure of micro-channel radiator | |
| CN109742062A (en) | Bionical point of shape plate heat exchanger | |
| CN111092277A (en) | Honeycomb type micro-channel cooling plate for battery thermal management and application thereof | |
| CN210321342U (en) | Printed circuit board heat exchanger with composite flow guide structure | |
| CN105423789B (en) | Triangular inner-fin heat pipe | |
| CN103629952A (en) | Tubular heat exchanger, method for manufacturing tubular heat exchanger and heat exchange equipment | |
| CN101922870B (en) | Dividing wall type heat exchanger | |
| CN211829107U (en) | Honeycomb type micro-channel cooling plate for battery thermal management | |
| CN202836268U (en) | Pipe type heat exchanger and heat exchanging device | |
| CN102767983A (en) | Guiding device and heat exchanger capable of achieving even distribution of fluid | |
| CN109801887B (en) | Fractal micro-channel heat exchanger | |
| CN209434175U (en) | Fractal micro-channel heat exchanger | |
| CN209344066U (en) | Bionical point of shape plate heat exchanger | |
| CN103411451B (en) | Rectification type tube-shell type heat exchanger | |
| RU2569406C1 (en) | Shell-tube heat exchanger | |
| CN113108923B (en) | Radiation blackbody cavity with micro-groove group structure and water-groove type blackbody radiation source | |
| EP0207677A1 (en) | Heat exchanger | |
| RU2584081C1 (en) | Micro channel heat exchanger | |
| RU2337295C2 (en) | Plates packet of heat-exchange aparatus | |
| CN114639647A (en) | Micro-channel heat dissipation structure and microelectronic chip structure | |
| CN110779371B (en) | Water-cooling tube-plate heat exchanger with optimally distributed fluid inlet and outlet | |
| RU159662U1 (en) | TURBULIZER | |
| CN105241286A (en) | Inner-fin heat pipe | |
| KR20190075679A (en) | shell in a shell and plate heat exchanger, and shell and plate heat exchanger having the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |