CN103638853B - A kind of S type passive type micro-mixer - Google Patents
A kind of S type passive type micro-mixer Download PDFInfo
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- CN103638853B CN103638853B CN201310555139.8A CN201310555139A CN103638853B CN 103638853 B CN103638853 B CN 103638853B CN 201310555139 A CN201310555139 A CN 201310555139A CN 103638853 B CN103638853 B CN 103638853B
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- mixed cell
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Abstract
The present invention discloses the S type passive type micro-mixer in a kind of Microfluidic Mixing field, comprise the upper cover plate and mixed plate that are bonded together up and down, mixed plate left part is provided with the first fluid intake pipe and the second fluid intake pipe, right part are provided with outlet, two kinds of fluid intake pipes also connect main channel, that head and the tail seamlessly transit n the contraction mixed cell and n diffusion mixed cell that connect successively between main channel and outlet, first n is shunk mixed cell and connects main channel, last diffusion mixed cell exit pipe; The profile in the trunnion axis cross section of single contraction mixed cell is made up of two log spirals shunk in mixed cell; The profile in the trunnion axis cross section of single diffusion mixed cell is made up of two log spirals in diffusion mixed cell; All diffusion mixed cells are all in the front side of the pole axis of log spiral, and all contraction mixed cells are all at the rear side of pole axis; The contact area between fluid can be increased, make mixing more abundant.
Description
Technical field
The present invention relates to the microfluidic field of Microfluidic Mixing, particularly relate to a kind of micro-mixer.
Background technology
The function such as separation, application of sample, mixing, reaction, detection of traditional biochemistry detection process can be achieved by microfluid system on chip.Both save reagent like this, turn reduce danger (as poisonous or react violent reagent).Microchemical engineering may be used for analysis and synthesis application as emerging technology, the minisize reaction system that microchemical engineering relates to mainly comprises micro-mixer, micro heat exchanger, fluid channel, wherein, there is many problems in micro-mixer: due to reducing of yardstick, suitable large of the ratio of fluid meter area and volume in the microchannel of micro-mixer, flow velocity and the Reynolds number of liquid are lower, often be in a kind of state of laminar flow, mixing is usually the diffusion motion on molecular level, makes the mixing of micro liquid become difficulty.
Micro-mixer is divided into active and passive type, and passive type micro-mixer refers to the method not needing external energy, depends on channel geometries, as slotted channels, fluid layering stream (adding barrier in the channel), serpentine channel, brings out chaotic advection etc.The such as novel SAR micro-mixer of the design such as Schonfeld; Stroock etc. utilize and have made SHM micro-mixer etc. at the staggered percussion instrument made of bamboo shape conduit of channel bottom etching.Also have by allowing passage bending micro-mixer carrying out mixing in spatial dimension, as the tesla structure, distortion pipeline etc. of C type, Z-type, curved arc pipeline, L-type, T-shaped, amendment.Active micro-mixer divides by action principle can be divided into that electrodynamometer type, magnetomotive force, ultrasonic type, branch are pouring-in, piezoelectric type, mangneto formula, jetting type, mechanical type etc., such as the vibroseis of the ultrasonic braking micro-mixer of the research such as Yang comes from piezoelectric ceramics (PZT), and Fr é d é ric Bottausci group have developed a kind of spider-type micro-mixer etc.As China Patent Publication No. is: the patent of CN 102151504 A, be utilize Secondary Flow to promote mixing equally, owing to there is prominent drawing together and sudden contraction structure in mechanism, although good mixing effect, but flow losses are very large.China Patent Publication No. is: CN 101975154 A, name are called: logarithmic spiral compound tube cannot piezoelectric pump, utilizes log spiral to make forward and reverse flow resistance not homogeneous turbulence pipe, compares and be greatly improved with Taper Pipe flow resistance coefficient.
The major way that existing passive mixing micro-mixer produces mixing is: in runner, increase baffle plate, and disturbance fluid produces mixing, and flow losses are large; According to the micro-mixer of the conceptual design of SAR, mixing runner is long, and incorporation time is long; Produce chaotic flow and carry out fluid-mixing, good mixing effect, flow losses are large; Prominent drawing together is utilized to produce vortex fluid-mixing with sudden contraction structure.
Summary of the invention
Object of the present invention is for solving the shortcomings such as existing blender incorporation time is long, mixing runner is long, flow losses are large, mixed effect is not good, a kind of S type passive type micro-mixer is proposed, the runner utilizing this special construction of log spiral to combine, shortens mixing distance, reduces flow losses, mixed effect and also greatly improve.
The technical solution used in the present invention is: comprise the upper cover plate and mixed plate that are bonded together up and down, upper cover plate left part has two inlet holes, right part has an outlet opening, mixed plate left part is provided with the first the fluid intake pipe communicated with inlet hole one and the second fluid intake pipe communicated with inlet hole two, right part is provided with the outlet communicated with outlet opening, two kinds of fluid intake pipes also connect main channel, that head and the tail seamlessly transit n the contraction mixed cell and n diffusion mixed cell that connect successively between main channel and outlet, first n is shunk mixed cell and connects main channel, last diffusion mixed cell exit pipe, the profile in the trunnion axis cross section of single contraction mixed cell is made up of two log spirals shunk in mixed cell, the profile in the trunnion axis cross section of single diffusion mixed cell is made up of two log spirals in diffusion mixed cell, all diffusion mixed cells are all in the front side of the pole axis of log spiral, and all contraction mixed cells are all at the rear side of pole axis.
The polar equation shrinking the first log spiral in mixed cell is:
, the polar equation shrinking the second log spiral in mixed cell is:
; B > 0,10 μm≤
≤ 500 μm, 10 μm≤
≤ 500 μm, 10 μm of <
< 200 μm, shrink the diffusion mixed cell that is adjacent of mixed cell about log spiral terminal (π,
) and (π,
) Central Symmetry.
Advantage of the present invention is: the present invention is that the principle design that can produce Secondary Flow according to fluid in bend pipe forms, and the log spiral in the present invention is S type, not parallel, is conducive to the formation of Secondary Flow, increases the contact area between fluid, makes mixing more abundant.Structure is simple, and be convenient to processing and integrated, mixing efficiency is high.Compared with the structure utilizing Secondary Flow to promote to mix with other, the smooth transition slowly of fluid of the present invention produces mixing, and does not have prominent drawing together and sudden contraction structure, under the prerequisite ensureing mixed effect, decrease flow losses.
Accompanying drawing explanation
Fig. 1 is structure chart of the present invention;
Fig. 2 is the top view of upper cover plate 15 in Fig. 1;
Fig. 3 is A-A profile in Fig. 1;
Fig. 4 is I partial enlarged drawing in Fig. 1;
In figure: 1. inlet hole one; 2. inlet hole two; 3. the first fluid intake pipe; 4. main channel; 5. shrink mixed cell; 6. shrink the first log spiral in mixed cell; 7. spread mixed cell second logarithmic spiral; 8. outlet; 9. pole axis; 10. spread the first log spiral in mixed cell; 11. diffusion mixed cells; 12. shrink the second log spiral in mixed cell; 13. the second fluid intake pipes; 14. outlet openings; 15. upper cover plates; 16. mixed plates.
Detailed description of the invention
As shown in Fig. 1 ~ 4: the present invention includes upper cover plate 15 and to be positioned under upper cover plate 15 and the mixed plate 16 be bonded together with upper cover plate 15, inlet hole 1, inlet hole 22, outlet opening 14 is had at upper cover plate 15, these three Kong Jun are vertical through holes, diameter is d, be highly h2, equal the height of upper cover plate 15.Inlet hole 1 and inlet hole 22 are positioned at the left part of upper cover plate 15, and outlet opening 14 is positioned at the right part of upper cover plate 15.Pole axis 9 is horizontal axis from left to right, is the pole axis of log spiral in mixed plate 16, and pole axis 9 is positioned in upper cover plate 15 and mixed plate 16 place vertical central plane.The distance of distance of center circle upper cover plate 15 left hand edge of inlet hole 1, inlet hole 22 is all L4, distance to the vertical plane at pole axis 9 place is L6, L5 respectively, outlet opening 14 is tangent with the vertical plane at pole axis 9 place, and its center of circle is L7 to the distance of the right hand edge of upper cover plate 15.
As shown in Figure 3: on mixed plate 16, be provided with the first fluid intake pipe 3, the second fluid intake pipe 13, main channel 4, n shrinks mixed cell 5, n spreads mixed cell 11, outlet 8.Inlet hole 1 and the first fluid intake pipe 3 communicate, and inlet hole 22 and the second fluid intake pipe 13 communicate, and outlet 8 and outlet opening 14 communicate.The first fluid intake pipe 3 and the second fluid intake pipe 13 are positioned at the left part of mixed plate 16, outlet 8 is positioned at the right part of mixed plate 16, the first fluid intake pipe 3 is all connected the left end of main channel 4 with the second fluid intake pipe 13, the right-hand member of main channel 4 connects the left end that first is shunk mixed cell 5, first right-hand member shrinking mixed cell 5 connects the left end that first spreads mixed cell 11, the right-hand member of first diffusion mixed cell 11 connects the left end that second is shunk mixed cell 5, so, n contraction mixed cell 5 and n diffusion mixed cell 11 are connected at interval successively, until last diffusion mixed cell 11 and outlet 8 connect.The first fluid intake pipe 3 and the second fluid intake pipe 13 also connect main channel 4, and main channel 4, n shrinks mixed cell 5, n spreads mixed cell 11, outlet 8 is from left to right communicated with.Wherein, the cross section of the first fluid intake pipe 3, the second fluid intake pipe 13, main channel 4, outlet 8 is all squares, and the length of the first fluid intake pipe 3 and the second fluid intake pipe 13 is L1, and width is w; The length of main channel 4 is L2, and width is w; The length of outlet 8 is L3, and width is w.The height i.e. height of distance mixed plate 16 upper surface of whole runner is h1.
The tubulose that single contraction mixed cell 5 is made up of the first log spiral 6 shunk in mixed cell and the second log spiral 12, the profile in the trunnion axis cross section of single contraction mixed cell 5 is made up of the first log spiral 6 shunk in mixed cell and the second log spiral 12.The tubulose that single diffusion mixed cell 11 is made up of the first log spiral 10 in diffusion mixed cell and the second log spiral 7, the profile in the trunnion axis cross section of single diffusion mixed cell 11 is made up of the first log spiral 10 in diffusion mixed cell and the second log spiral 7.Be interconnected between adjacent two contraction mixed cells 5 and diffusion mixed cell 11 and be connected smoothly, all diffusion mixed cells 11 are all in the front side of pole axis 9, and all contraction mixed cells 5, all at the rear side of pole axis 9, form S type mixed cell.
Shrink the first log spiral 6 in mixed cell 5 and the second log spiral 12 all with pole axis 9 for rotating pole axis; The first log spiral 10 in diffusion mixed cell 11 and the second log spiral 7 all with pole axis 9 for rotating pole axis.
The polar equation shrinking the first log spiral 6 in mixed cell 5 is:
, the polar equation shrinking the second log spiral 12 in mixed cell 5 is:
.Wherein
with
span be: 10 μm≤
≤ 500 μm, 10 μm≤
≤ 500 μm and 10 μm of <
-
< 200 μm; Wherein, parameter b determines the direction of rotation of log spiral: as b > 0, log spiral counterclockwise rotates; Rotate toward the clockwise direction as b < 0.In the present invention, b is the constant that perseverance is greater than zero, and namely it counterclockwise rotates.The value of θ is from 0 to π, this ensures that theres contraction mixed cell 5 end to end with diffusion mixed cell 11.
As shown in Figure 4: in contraction mixed cell 5, the concrete technique of painting of the first log spiral 6 and the second log spiral 12 is: 1, draw any straight line in the plane as pole axis 9, on pole axis 9, any one gets a bit as limit
.With (0,
) be starting point, with the first log spiral 6 for spin equation, namely obtain the first log spiral 6 by being rotated counterclockwise π, its terminal point coordinate be (π,
).Same method with
for limit, with (0,
) namely obtain the second log spiral 12 for starting point is rotated counterclockwise π, its terminal point coordinate be (π,
).
be two log spiral two starting points (0,
) and (0,
) mid point.Shrink the mixed cell 5 diffusion mixed cell 11 adjacent with it about
central Symmetry.Shrinking the diffusion mixed cell position relationship that is adjacent of mixed cell 5 is: they about log spiral terminal (π,
) and (π,
) mid point
central Symmetry.
The first fluid intake pipe 3 and the second fluid intake pipe 13 are all perpendicular to pole axis 9, and main channel 4 and outlet 8 are all the same with pole axis 9 to be horizontally disposed with, and the rear wall of main channel 4 is close to pole axis 9, and the front side wall of outlet 8 is close to pole axis 9.
Total number of diffusion mixed cell 11 and contraction mixed cell 5 is n, 2≤n≤8.
Operation principle of the present invention: two kinds of different fluids flow into main channel 4 respectively by after two inlet holes through the first fluid intake pipe 1 and the second fluid intake pipe 13, enter afterwards and shrink mixed cell 5, now due to the effect of centrifugal force, fluid can down offset by side wall surface, and form Secondary Flow, diffusion mixed cell 11 is entered through shrinking mixed cell 5, equally now because fluid is due to centrifugal action upwards side wall surface skew, produce lateral flow and form eddy current in such fluid contraction mixed cell 5 and diffusion mixed cell 11 and promote contacting with each other between fluid.So just complete mixed process through n staggered contraction mixed cell 5 and diffusion mixed cell 11, the liquid mixed flows out from outlet 8.
Claims (3)
1. a S type passive type micro-mixer, comprise the upper cover plate (15) and mixed plate (16) that are bonded together up and down, upper cover plate (15) left part has two inlet holes, right part has an outlet opening (14), it is characterized in that: mixed plate (16) left part is provided with the first the fluid intake pipe (3) communicated with inlet hole one and the second fluid intake pipe (13) communicated with inlet hole two, right part is provided with the outlet (8) communicated with outlet opening (14), first, the second fluid intake pipe all and connect main channel (4), that head and the tail seamlessly transit n contraction mixed cell (5) and n diffusion mixed cell (11) that connect successively between main channel (4) and outlet (8), first is shunk mixed cell (5) and connects main channel (4), last diffusion mixed cell (11) exit pipe (8), the profile in the trunnion axis cross section of single contraction mixed cell (5) is made up of first, second log spiral shunk in mixed cell, the profile in the trunnion axis cross section of single diffusion mixed cell (11) is made up of first, second log spiral in diffusion mixed cell, all diffusion mixed cells (11) are all in the front side of the pole axis (9) of log spiral, and all contraction mixed cells (5) are all at the rear side of pole axis (9),
In described contraction mixed cell (5), the polar equation of the first log spiral (6) is:
, in described contraction mixed cell (5), the polar equation of the second log spiral (12) is:
; B > 0,10 μm≤
≤ 500 μm, 10 μm≤
≤ 500 μm, 10 μm of <
< 200 μm, the diffusion mixed cell (11) that described contraction mixed cell (5) is adjacent about log spiral terminal (π,
) and (π,
) Central Symmetry.
2. a kind of S type passive type micro-mixer according to claim 1, it is characterized in that: first, second kind of fluid intake Guan Jun is perpendicular to pole axis (9), main channel (4) and outlet (8) are all horizontally disposed with, the rear wall of main channel (4) is close to pole axis (9), and the front side wall of outlet (8) is close to pole axis (9).
3. a kind of S type passive type micro-mixer according to claim 1, is characterized in that: the number of diffusion mixed cell (11) and contraction mixed cell (5) is n, 2≤n≤8.
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| CN104155463B (en) * | 2014-08-27 | 2016-01-20 | 南京大学 | The device and method that a kind of microfluidic chip liquid drop produces and measures |
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| CN105148781B (en) * | 2015-08-17 | 2017-06-27 | 江苏大学 | A kind of cross micro-mixer of axial symmetry log spiral |
| CN106268471B (en) * | 2016-08-05 | 2019-02-05 | 江苏大学 | A kind of reducing elbow tandem micro-mixer |
| CN108183247B (en) * | 2016-12-08 | 2020-05-19 | 中国科学院大连化学物理研究所 | Liquid fluid mixer and application thereof in direct liquid fuel cell |
| CN106861781B (en) * | 2017-04-10 | 2023-04-11 | 黑龙江科技大学 | Micro-channel preparation method for reducing fluid resistance based on surface nano-bubbles |
| TW202410963A (en) | 2017-07-31 | 2024-03-16 | 美商康寧公司 | Improved process-intensified flow reactor |
| TR201722168A2 (en) * | 2017-12-27 | 2019-07-22 | Cankaya Ueniversitesi | PASSIVE MICRO MIXER FOR MICRO-FLUID SYSTEMS |
| CN109331716A (en) * | 2018-11-22 | 2019-02-15 | 南京航空航天大学 | A kind of hybrid passive micro-mixer of vortex system |
| CN111974290B (en) * | 2020-08-31 | 2021-10-12 | 南京航空航天大学 | Taiji-shaped passive micro mixer |
| CN112936855B (en) * | 2021-01-29 | 2022-05-24 | 东南大学 | General quick micro mixer based on surface curing 3D prints |
| CN115501793A (en) * | 2022-08-21 | 2022-12-23 | 东北电力大学 | Double-spiral passive micro mixer |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101091887A (en) * | 2007-06-27 | 2007-12-26 | 江苏大学 | Mini mixer capable of uniform mixing gas mixture rapidly, and preparation method |
| CN102151504A (en) * | 2011-02-28 | 2011-08-17 | 北京工业大学 | Micro mixer with unsymmetrical separation and recombination fan-shaped cavity structures |
| CN102788781A (en) * | 2012-05-24 | 2012-11-21 | 浙江大学 | Microfluidic chip for biological chemiluminescence detection and detection method thereof |
-
2013
- 2013-11-11 CN CN201310555139.8A patent/CN103638853B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101091887A (en) * | 2007-06-27 | 2007-12-26 | 江苏大学 | Mini mixer capable of uniform mixing gas mixture rapidly, and preparation method |
| CN102151504A (en) * | 2011-02-28 | 2011-08-17 | 北京工业大学 | Micro mixer with unsymmetrical separation and recombination fan-shaped cavity structures |
| CN102788781A (en) * | 2012-05-24 | 2012-11-21 | 浙江大学 | Microfluidic chip for biological chemiluminescence detection and detection method thereof |
Non-Patent Citations (1)
| Title |
|---|
| A panar micromixer based on sequential logarithmic spirals;Tomas F. Scherr et.al;《Proceedings of the ASME 2012 Summer Bioengineering Conference》;20120623;31-32 * |
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