CN211537567U - Vertical electrode active microfluid mixer - Google Patents
Vertical electrode active microfluid mixer Download PDFInfo
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- CN211537567U CN211537567U CN201922120947.7U CN201922120947U CN211537567U CN 211537567 U CN211537567 U CN 211537567U CN 201922120947 U CN201922120947 U CN 201922120947U CN 211537567 U CN211537567 U CN 211537567U
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- 239000012530 fluid Substances 0.000 claims abstract description 26
- 230000001154 acute effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 230000005684 electric field Effects 0.000 abstract description 4
- 238000005370 electroosmosis Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011859 microparticle Substances 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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Abstract
The utility model belongs to the micro-fluidic chip field specifically discloses an active microfluid blender of perpendicular electrode, including two entries, an export, little mixing channel, 4 electrodes, mixing chamber, dog. The 4 electrodes are applied to the mixing chamber at 90-degree intervals, the electrodes are applied to different positions of the microfluidic channel to generate an external electric field, and when the electric field flows through the mixing chamber, the electroosmosis effect of the microfluid flowing through the 4 electrodes is vertical to the main movement direction of the microfluid, and vortex is generated in the space of the mixing chamber, so that the laminar flow state of the original microfluid is broken, and the mixing of the fluid is promoted. The utility model has the advantages that: the micro-mixing channel is not required to be designed in a complex way, and the micro-fluid can be mixed only by controlling the voltage applied to the electrode, so that the mixing efficiency is improved.
Description
Technical Field
The utility model relates to an active microfluid blender of perpendicular electrode with novel structure, its hybrid mode is active.
Background
The micro-fluidic chip becomes the popular field of research by the characteristics of miniaturization, portability, integration, low cost and the like, and the supported micro-fluidic technology becomes a brand-new technology applied to multiple fields of machinery, biomedicine, chemical engineering, aerospace and the like; all can use the microfluid mixer before carrying out experimental reaction in many fields such as chemical experiment, environmental monitoring, DNA detection, realize the intensive mixing of multiple reagent under the different requirements, the microfluid mixer of excellent performance has characteristics and the cost lower fast, high efficiency, easily integration, simple structure, mixes well.
Mixing on a macro scale generally refers to unit operations in which two or more materials are dispersed within each other to some degree of homogeneity by means of mechanical or hydrodynamic forces; the micron-scale mixing is very different from the macro-fluid mixing because the convection effect of the micro-fluid is not obvious at the micron scale, and in this case, the mixing of the micro-fluid mainly depends on the diffusion effect between molecules, so that the micro-fluid mixing becomes difficult under certain experimental requirements.
The micro-fluid mixer can be divided into a passive micro-fluid mixer and an active micro-fluid mixer, wherein the passive micro-fluid mixer utilizes the geometric shape or the fluid characteristic to generate a mixing effect, and the mixing does not depend on other external forces except the force (such as pressure, electroosmosis driving and the like) for driving the fluid to flow; the active micro-fluid mixer realizes mixing by means of external forces such as magnetic force, electric field force, sound field and the like; the active microfluid mixer has good mixing effect, but the structure is complex and the cost is high.
Based on this, the utility model provides a little mixing channel single structure, electrode design is simple, mixes the obvious active microfluid blender of effect, relies on the electric field force drive, realizes that two kinds of different concentration microfluids mix.
Disclosure of Invention
The utility model aims to provide a vertical electrode active micro-fluid mixer with a novel structure, which is used for further simplifying the electrode design and optimizing the micro-fluid channel structure, and the total length of the device is 310 μm; the diameter e of the outer circle of the mixing chamber is 150 micrometers, the width a of the first inlet and the width b of the second inlet are both 25 micrometers, the width c of the outlet is 50 micrometers, the width d of the micro-mixing channel 3 is 50 micrometers, the stop block is formed by a square chamfer, and the width f is 50 micrometers; the microfluid mixer is symmetrical structure, first entry and second entry axis respectively with microfluid mixer symmetry axis becomes 30 degrees contained angles.
The technical scheme of the utility model is that: a vertical electrode active microfluid mixer is disclosed, two microfluids with different concentrations are injected from a first inlet and a second inlet respectively, sequentially flow through a micro-mixing channel, a mixing chamber and flow out from an outlet, and the original laminar flow state is broken due to the action of four electrodes in the space of the mixing chamber, so that the two microfluids are mixed.
The utility model discloses a income lies in: compared with a passive micro-fluid mixer, the vertical electrode micro-fluid mixer can realize mixing more quickly and better under the same condition; compared with the traditional active micro-fluid mixer, the micro-fluid mixer has simpler structure and is convenient to process.
Drawings
Fig. 1 is a schematic diagram of a two-dimensional structure of a vertical electrode active microfluidic mixer, in which: 1. the micro-mixing device comprises a first inlet, 2, a second inlet, 3, a micro-mixing channel, 4, a first electrode, 5, a second electrode, 6, a baffle, 7, a mixing chamber, 8, a third electrode, 9, a fourth electrode and 10, and is characterized in that the micro-mixing channel is arranged in the micro-mixing channel.
FIG. 2 is a schematic diagram of the geometry of a vertical electrode active microfluidic mixer, where a and b are the two inlet widths, c is the outlet width, d is the micro-mixing channel width, e is the mixing chamber outside radius, f is the block width, and t1, t2, t3, t4 are the electrode distribution angles.
FIG. 3 is a schematic diagram of a streamline simulation of a vertical electrode active microfluidic mixer, wherein the density of the streamline simulation represents different concentration levels of the microfluidic flow.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto.
A vertical electrode active micro-fluid mixer comprises a first inlet, a second inlet, a micro-mixing channel, a first electrode, a second electrode, a baffle block, a mixing chamber, a third electrode, a fourth electrode and an outlet.
Specifically, the fluid characteristics of the vertical electrode active micro-fluid mixer are as follows, wherein a first micro-fluid to be mixed is injected from a first inlet, the initial flow rate is 0.1mm/s, a second micro-fluid to be mixed is injected from a second inlet, and the initial flow rate is 0.1 mm/s; the conductivity of the two microfluids is 0.12 mS/m; the initial pressure for injecting the microfluid from the first inlet and the second inlet is zero.
Specifically, four electrodes are uniformly distributed on the outer circumference of a mixing chamber of the vertical electrode active micro-fluid mixer at intervals of 90 degrees, the applied voltage is direct current voltage, the voltage applied by a first electrode and a fourth electrode is 0.12V, and the voltage applied by a second electrode and a third electrode is-0.12V.
Specifically, the ratio of the concentration of microfluid injected from a first inlet to the concentration of microfluid injected from a second inlet is 1: 2, and the ratio of the theoretical value of the concentration of microfluid after mixing and the concentration of microfluid flowing out from an outlet after mixing to the concentration of microfluid at the first inlet is 1: 1.5.
Specifically, the utility model discloses little mixing channel length is not limited to this, can suitably shorten or lengthen its length according to actual need, and corresponding reduction or increase whole device length to can satisfy actual separation needs and be the standard.
Specifically, the utility model discloses the concrete structure of dog should have slick and sly edge, should not produce the damage to the microparticle that is mingled with in the microfluid, should guarantee microfluid impact as few as possible at the flow in-process simultaneously to relatively fragile microparticle in the protection microfluid.
Claims (4)
1. A vertical electrode active micro-fluid mixer comprises a first inlet (1), a second inlet (2), a micro-mixing channel (3), a first electrode (4), a second electrode (5), a baffle block (6), a mixing chamber (7), a third electrode (8), a fourth electrode (9) and an outlet (10); the excircle diameter e of the mixing chamber (7) is 150 micrometers, the width a of the first inlet (1) and the width b of the second inlet (2) are both 25 micrometers, the width c of the outlet (10) is 50 micrometers, the width d of the micro-mixing channel (3) is 50 micrometers, the stop block (6) is formed by a square chamfer, and the width f is 50 micrometers; the microfluid mixer is of a symmetrical structure, and the axes of the first inlet (1) and the second inlet (2) respectively form an included angle of 30 degrees with the symmetry axis of the microfluid mixer; 4 electrodes are uniformly distributed on the outer circle of the mixing chamber (7), and the central line of the electrode (9) and the symmetry line of the microfluid mixer form an acute angle t1The included angles t2, t3 and t4 between the center lines of the fourth electrode (9) and the second electrode (5), between the second electrode (5) and the first electrode (4), between the center lines of the first electrode (4) and the third electrode (8) are all 90 degrees, and the central angle corresponding to each electrode arc is 8 degrees.
2. The vertical electrode active microfluidic mixer of claim 1, wherein: two kinds of microfluid with different concentrations are respectively injected from a first inlet (1) and a second inlet (2), sequentially flow through a micro-mixing channel (3) and a mixing chamber (7) and flow out from an outlet (10), and the original laminar flow state is broken due to the action of four electrodes in the space of the mixing chamber (7), so that the two kinds of microfluid are mixed.
3. The vertical electrode active microfluidic mixer of claim 1, wherein: the three-dimensional structure of the stop block is a hexahedron, and each edge of the hexahedron is chamfered; the three-dimensional structure of the corresponding area of the mixing chamber (7) is the part of the outer circle corresponding to the cylinder minus the hexahedron, and the center of the hexahedron is superposed with the center of the cylinder.
4. The vertical electrode active microfluidic mixer of claim 1, wherein: the micro mixing channel (3) is of a tetrahedral structure, and the side length of the micro mixing channel is 50 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922120947.7U CN211537567U (en) | 2019-12-02 | 2019-12-02 | Vertical electrode active microfluid mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922120947.7U CN211537567U (en) | 2019-12-02 | 2019-12-02 | Vertical electrode active microfluid mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211537567U true CN211537567U (en) | 2020-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922120947.7U Expired - Fee Related CN211537567U (en) | 2019-12-02 | 2019-12-02 | Vertical electrode active microfluid mixer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211537567U (en) |
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2019
- 2019-12-02 CN CN201922120947.7U patent/CN211537567U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| 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: 20200922 |