KR102114778B1 - Micromixer - Google Patents

Abstract

The micro-mixer according to the present invention is an inlet through which two or more types of fluids flow; The first nozzle part adjacent to the plurality of first nozzle parts and the plurality of first nozzle parts formed by receiving the fluid from the inlet part and having a narrow cross-sectional area according to the flow direction of the fluid and being spaced apart from each other sequentially A first channel including a first mixing flow path provided between the two channels and having an electric field formed therein to move the fluid; The second nozzle adjacent to the plurality of second nozzles and the plurality of second nozzles, which are formed to receive the fluid from the inlet, and have a narrow cross-sectional area according to the direction of fluid flow, are spaced apart from each other, and are sequentially formed. A second channel provided between the portions and including a second mixing flow path communicating with the first mixing flow path, and having an electric field formed therein to move the fluid; And a discharge unit that receives and discharges the fluid mixed in the first channel and the second channel.
The micro-mixer according to the present invention is formed such that the first nozzle portion and the second nozzle portion have a narrow cross-sectional area according to the flow direction of the fluid, and the first nozzle flow passage, the first mixing flow passage, the second nozzle flow passage and the third nozzle flow passage, As the second mixing flow passage and the fourth nozzle flow passage are sequentially and repeatedly arranged, separation and diffusion of the fluid can be repeatedly performed, thereby improving mixing efficiency.

Description

Micromixer {MICROMIXER}

The present invention relates to a micromixer, and more particularly, to a micromixer for efficiently mixing two or more types of fluids.

In general, microsystems are used for numerous purposes such as chemical analysis, biomedical diagnostics, environmental and food monitoring, and drug delivery. The microsystem described above includes a process of controlling, mixing, reacting, separating, and detecting the microfluidic fluid flow, and the microfluidic fluid flow described above has an important influence on the development of the entire microanalysis system. Among the microsystems, a micromixer for mixing fluids is for mixing two or more types of fluids, such as a patient's blood sample and reagents. Samples and reagents carried by a microchannel for analysis or biochemical reaction in a micro device Effective mixing of the back is an essential device.

However, the flow of the fluid appearing in the micro unit results in a low Reynolds number and a Peclet number, and it is difficult to form turbulence and requires mixing by diffusion to obtain a uniform mixture of fluids. There are limits. Incidentally, in the flow of micro-fluids, in the absence of turbulence, mixing is caused by diffusion of molecules, and requires a long length of microchannels, which takes a lot of time. However, as described above, it is not preferable to apply a micromixer having a long microchannel because it is complicated to integrate into a microsystem.

On the other hand, micromixers can be largely classified into two types according to the mixing mechanism: an active micromixer and a passive micromixer. The active micromixer is a micromixer equipped with a flow generating means inside the microchannel to improve mixing performance, and the fluid flow of the active micromixer is configured to improve mixing performance by external energy or external stimuli.

[0005] Korean Patent No. 10-0769306 discloses a technique related to the above-mentioned active type micromixer.

However, a conventional active micromixer may have a higher mixing performance than a passive micromixer, but is complicatedly formed by requiring an apparatus for a flow generating means, and has the disadvantage of a possibility of leaking a small amount of fluid and an increase in manufacturing cost. . In addition, active micromixers have difficulty in integrating with microsystems due to the complexity of the device.

On the other hand, the passive micromixer is a micromixer that introduces a static microstructure inside the microchannel so that the fluid is mixed, and requires external energy input and a pressure head is used to maintain a constant flow rate. Most passive micromixers increase the mixing area by increasing the interfacial area between the mixed fluids through a complex shape, and are preferred because of the convenience of manufacturing and system integration, but have a long channel length and a long mixing time compared to active micromixers. There is this.

The present invention was created to solve the problems as described above, the first nozzle portion and the second nozzle portion is formed so that the cross-sectional area is narrowed according to the flow direction of the fluid, it is gradually pressurized before moving to the first mixing flow path , The diffusion distance is reduced, so that the mixing performance can be improved without an active control system, and as the pressurized fluid diffuses and moves into the first mixing passage and the second mixing passage, the contact interface area between the mixing fluids is increased to be active. An object of the present invention is to provide a micromixer having an increased mixing performance without a phosphorus control system.

The micro-mixer according to the present invention for achieving the above object, the first fluid passage and the second fluid passage to which different fluids flow respectively, and one side respectively communicates with the first fluid passage and the second fluid passage The other side is in communication with one side of the first nozzle portion and the second nozzle portion, the inlet portion including a mixed inlet passage for introducing a fluid into the first nozzle portion and the second nozzle portion, respectively, and transfer fluid from the inlet portion The first nozzle flow path is formed so that the cross-sectional area is narrowed according to the direction of the flow of the fluid, and the lower surface is inclined upward from one side to the other, and the second nozzle flow path is formed so that the upper surface is inclined downward from one side to the other, The first nozzle flow passage, the first mixed flow passage, the first nozzle portion in which the second nozzle flow passage is repeatedly disposed, and the first channel in which a plurality of the first nozzle portions are continuously repeated along the flow direction of the fluid, and The third nozzle flow path that receives the fluid from the inlet, and the upper surface is inclined downward from one side to the other so that the cross-sectional area is narrowed according to the direction of the fluid, and the lower surface is formed to incline upward from one side to the other. A fourth nozzle flow path, the third nozzle flow path, the second mixed flow path, the second nozzle portion in which the fourth nozzle flow path is repeatedly disposed, and the plurality of second nozzle portions are continuously repeated along the flow direction of the fluid. A formed second channel, a first electrode portion for applying an -electrode to an upper surface of the first nozzle flow path and a lower surface of the second nozzle flow path, and a lower surface of the first nozzle flow path and an upper surface of the second nozzle flow path + A second electrode portion for applying an electrode, a third electrode portion for applying an electrode to the lower surface of the third nozzle flow path and an upper surface of the fourth nozzle flow path, an upper surface of the third nozzle flow path and the fourth nozzle flow path An electric field inducing portion including a fourth electrode portion for applying a + electrode to the lower surface, and a discharge portion for receiving and discharging the mixed fluid in the first channel and the second channel, different fluids from the first nozzle portion And separated from the second nozzle part, in the first mixing flow passage and the second mixing flow passage. Diffusion and mixing, separation and diffusion mixing are repeated.

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In addition, the range of the nozzle length (Lc / Wc), which is the length (Lc) compared to the one-side width (Wc) of the first nozzle portion and the second nozzle portion, is equal to 0.41 to 2.00. It is preferred that the first nozzle portion and the second nozzle portion of the other side width (Wc) compared to the other side width (Wn) of the nozzle end width (Wn / Wc), the range is preferably formed from 0.13 to 0.47 .

The micro-mixer according to the present invention is formed such that the first nozzle portion and the second nozzle portion have a narrow cross-sectional area according to the flow direction of the fluid, is gradually pressurized before moving to the first mixing flow path, and the diffusion distance is reduced to be active. Even without the phosphorus control system, the mixing performance can be improved, and the mixing performance is improved without the active control system by increasing the contact interface area between the mixing fluids while the pressurized fluid diffuses into the first mixing channel and the second mixing channel. Can be increased.

In addition, since an electric field is formed in the first channel and the second channel, the fluid can be mixed in an electro-osmotic manner, so that the mixing efficiency can be increased.

In addition, the nozzle length (Lc / Wc) is formed to a size of 0.41 to 2.00, and the nozzle end width (Wn / Wc) is formed to a size of 0.13 to 0.47 to provide optimal dimensions of the micromixer capable of increasing mixing performance. It is possible to hire.

1 is a perspective view schematically showing a micromixer of the present invention,
Figure 2 is a cross-sectional view of the first channel of the micro-mixer shown in Figure 1,
Figure 3 is a cross-sectional view of the second channel of the micro-mixer shown in Figure 1,
Figure 4 is a graph showing the relationship between the mixing performance of the fluid and the nozzle length (Lc / Wc) of the micromixer shown in Figure 1,
5 and 6 is an analysis image showing the distribution of the dye mass fraction on a plane with respect to the change in the nozzle length (Lc / Wc) of the micromixer shown in Figure 1,
FIG. 7 is a graph showing the relationship between the nozzle end width (Wn / Wc) of the micromixer shown in FIG. 1 and the mixing performance of the fluid;
8 and 9 is an analysis image showing the distribution of the dye mass fraction on a plane with respect to the change in the nozzle end width (Wn / Wc) of the micromixer shown in FIG. 1,
10 is a graph comparing the mixing performance of a micromixer formed with an optimal design and the mixing performance of a micromixer formed with an optimal size derived based on parametric analysis;
FIG. 11 is a state diagram schematically showing a flow path of a fluid by an electric field of the micromixer shown in FIG. 1.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be interpreted as being limited to ordinary or dictionary meanings, and the inventor appropriately explains the concept of terms in order to explain his or her invention in the best way. Based on the principle of being able to be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments shown in the embodiments and the drawings described in this specification are only the most preferred embodiments of the present invention, and do not represent all of the technical spirit of the present invention, and at the time of this application, they can be replaced evenly It should be understood that there may be variations.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, the micromixer 10 according to an embodiment of the present invention is for mixing two or more types of fluids, the inlet 100, the first channel 200, and the second channel 300 ), A discharge unit 400, an electric field induction unit 500.

The inlet portion 100 is for transferring fluids to be mixed with each other, and a flow path through which the fluid moves is formed to introduce two or more kinds of fluids. The inflow part 100 may include a first fluid passage 110, a second fluid passage 120, and a mixed inflow passage 130.

The first fluid passage 110 and the second fluid passage 120, two or more types of fluid are respectively introduced. The first fluid path 100 and the second fluid path 120 are disposed to face each other and are formed such that two or more kinds of fluids are introduced from one side and the other side communicates with each other. Accordingly, a fluid flows from one side of the first fluid path 100 to the other side, and a fluid different from the fluid flowing into the first fluid path 100 from one side of the second fluid path 100 is introduced. , Two or more types of fluids may be mixed with each other on the other side of the first fluid path 110 and the second fluid path 120. If it is added, a water-dye solution is introduced through the first fluid passage 110, and water is preferably introduced through the second fluid passage 120, but is not limited thereto, and the type of fluid is the micromixer ( Depending on the purpose of 10), it may be appropriately changed and applied.

The mixed flow path 130 receives the fluid from the first fluid path 110 and the second fluid path 120, and then transfers the fluid to the first channel 200 and the second channel 300 to be described later. do. That is, one side of the mixed flow path 130 communicates with the first fluid path 110 and the second fluid path 120, and the other side has the first channel 200 and the second channel 300. Each is in communication with each other to flow the fluid to the first nozzle portion 210 and the second nozzle portion 310. If it is added, the mixing inflow path 130 is disposed in the vertical direction on the other side of the first fluid path 110 and the second fluid path 120, so as to the first fluid path 110 and the second fluid. Two or more types of fluids mixed at the other side of the 120 may be delivered, and two or more types of fluids are mixed with each other through the mixing inflow path 130 so that the first nozzle part 210 and the second nozzle part ( 310).

Referring to FIG. 2, in the first channel 200, a flow path through which a fluid moves is formed, and two or more kinds of fluid mixed from the mixing inflow path 130 flow together. That is, one end of the first channel 200 is communicated with the inlet part 100 and receives two or more types of fluid from the inlet part 100, while moving from one side to the other along the first channel 200 The fluids can be mixed with each other. If the second channel 200, the first end of the mixed inlet passage 130 can be communicated with the other side, the fluid can be delivered, the first channel 200 is an electric field formed therein through the electro-osmotic pressure method The fluid is configured to move. The first channel 200 may include a plurality of first nozzle units 210 and a plurality of first mixing flow paths 220.

The plurality of first nozzle parts 210 are formed to have a narrow cross-sectional area according to a direction in which the fluid flows, and are sequentially spaced apart from each other. That is, the fluid repeatedly moves a plurality of first nozzle parts 210 formed to have a narrow cross-sectional area according to the traveling direction. The plurality of first nozzle parts 210 may include a first nozzle passage 211 and a second nozzle passage 212.

The first nozzle flow path 211 is formed such that the lower surface is inclined upward from one side to the other. That is, the first nozzle flow path 211 may be formed to have an inclined surface such that the lower surface is inclined upward from one side to the other, and the upper surface is formed in a flat surface so that the cross-sectional area is narrowed according to the flow direction of the fluid. In a case, the first nozzle flow path 211 is formed in a trapezoidal shape in which the length of one side width is longer than the length of the other side width, and the other side can communicate with the first mixing flow path 220 to be described later.

The second nozzle flow path 212 is formed such that the upper surface is inclined downward from one side to the other. That is, the second nozzle flow path 212 is formed as an inclined surface such that the upper surface is inclined downward from one side to the other, and the lower surface is formed in a flat surface so that the cross-sectional area is narrowed according to the flow direction of the fluid. If it is further expanded, the second nozzle flow path 212 is formed in a trapezoidal shape in which the length of one side width is longer than the length of the other side width, and the other side can communicate with the first mixing flow path 220.

The first mixing passage 220 is provided between adjacent first nozzle parts 210 of the plurality of first nozzle parts 210. That is, the first mixing passage 220 is preferably provided between one first nozzle part 210 of the plurality of first nozzle parts 210 and another first nozzle part 210. More specifically, the first mixing flow path 220 is preferably provided between the first nozzle flow path 211 and the second nozzle flow path 212. If it is further expanded, one side of the first mixed flow path 220 communicates with the first nozzle flow path 211, and the other side communicates with the second nozzle flow path 212, so that the first nozzle flow path 211 and the first It is preferable that the 1 mixing flow path 220 and the second nozzle flow path 212 are sequentially and repeatedly arranged. The first mixing passage 220 is formed such that the lengths of one side and the other side width correspond to the lengths of one side width of the first nozzle part 210, and the cross section is preferably formed in a rectangular shape.

Referring to FIG. 3, in the second channel 300, a flow path through which a fluid moves is formed, and two or more kinds of fluid mixed from the mixed inflow path 130 flow together. That is, the fluid moving along the mixed inflow path 130 is separated and moved into the first channel 200 and the second channel 300. The second channel 300 is one end is in communication with the inlet portion 100 receives two or more types of fluid from the inlet portion 100, the fluid while moving from one side to the other side along the second channel 300 Can be mixed with each other. When the second channel 300 is expanded, one end may communicate with the other side of the mixing inflow path 130 to receive the fluid, and the second channel 300 may have an electric field formed therein through an electro-osmotic pressure method. The fluid is configured to move. The second channel 300 may include a plurality of second nozzle units 310 and a plurality of second mixing flow channels 320.

The plurality of second nozzle parts 310 are formed to have a narrow cross-sectional area according to the direction in which the fluid flows, and are sequentially spaced apart from each other. That is, the fluid repeatedly moves a plurality of second nozzle parts 310 formed to have a narrow cross-sectional area according to the traveling direction. The plurality of second nozzle parts 310 may include a third nozzle passage 311 and a fourth nozzle passage 312.

The third nozzle flow path 311 is formed such that the upper surface is inclined downward from one side to the other. That is, the third nozzle flow path 311 is formed as an inclined surface such that the upper surface is inclined downward from one side to the other, and the lower surface is formed as a flat surface, so that the cross-sectional area is narrowed according to the direction of the fluid. If it is further expanded, the third nozzle flow path 311 is formed in a trapezoidal shape in which the length of one side width is longer than the length of the other side width, and the other side can communicate with the second mixing flow path 320 to be described later.

The fourth nozzle flow path 312 is formed so that the lower surface is inclined upward from one side to the other. That is, the fourth nozzle flow path 312 may be formed to have an inclined surface such that the upper surface is inclined downward from one side to the other, and the lower surface is formed in a flat surface so that the cross-sectional area is narrowed according to the direction of the fluid. If it is further expanded, the fourth nozzle flow path 212 is formed in a trapezoidal shape in which the length of one side width is longer than the length of the other side width, and the other side can communicate with the second mixing flow path 320.

The second mixing passage 320 is provided between adjacent second nozzle parts 310 among the plurality of second nozzle parts 310. That is, the second mixing channel 320 is preferably provided between one second nozzle unit 310 and the other second nozzle unit 310 among the plurality of second nozzle units 310. More specifically, the second mixing passage 320 is preferably provided between the third nozzle passage 311 and the fourth nozzle passage 312. If the second side of the second mixing passage 320 is in communication with the second nozzle passage 311, the other side is in communication with the fourth nozzle passage 312, the third nozzle passage 311, the first It is preferable that the two mixing flow path 320 and the fourth nozzle flow path 312 are sequentially and repeatedly arranged. The second mixing channel 320 is formed such that the lengths of one side and the other side width correspond to the lengths of one side width of the second nozzle part 310, and the cross section is preferably formed in a rectangular shape.

Meanwhile, the second mixing channel 320 may communicate with the first mixing channel 220. By communicating the first mixing passage 220 and the second mixing passage 320, fluids moving the first nozzle part 210 and the second nozzle part 310 may be mixed with each other. In other words, it is preferable that the first mixing flow path 220 and the second mixing flow path 220 are formed in a size corresponding to each other and integrally configured, and the first mixing flow path 220 and the second mixing flow path are formed. 320, the upper side of one side is in communication with the second nozzle flow path 211, and the lower side of one side is in communication with the third nozzle flow path 311 to receive fluid from the upper and lower portions to increase mixing efficiency. have. That is, the fluid is separated from the first nozzle unit 210 and the second nozzle unit 310, and is diffusion-mixed in the first mixing channel 220 and the second mixing channel 320 to separate and diffuse mixing. By repeating, mixing efficiency can be improved. Also, the first nozzle part 210 and the second nozzle part 310 are formed to have a narrow cross-sectional area according to the flow direction of the fluid, and are gradually pressurized and diffused before moving to the first mixing passage 220. Mixing performance may be improved by decreasing the distance, and the mixing performance may be increased by increasing the contact interface area between the mixed fluids while the pressurized fluid diffuses and moves to the first mixing channel 220 and the second mixing channel 320. This can be augmented.

Meanwhile, the first nozzle part 210 and the second nozzle part 310 are preferably formed to have sizes corresponding to each other, and one side of the first nozzle part 210 and the second nozzle part 310 The nozzle length (Lc / Wc) range, which is the length (Lc) compared to the width (Wc), is preferably formed from 0.41 to 2.00. In addition, the first nozzle part 210 and the second nozzle part 310 are the other side width Wn compared to one side width Wc of the first nozzle part 210 and the second nozzle part 310. It is preferable that the range of the nozzle end width (Wn / Wc) is 0.13 to 0.47.

On the other hand, Figure 4 is a graph showing the relationship between the mixing performance of the fluid and the nozzle length (Lc / Wc), which is the length (Lc) compared to one side width (Wc) of the first nozzle portion (210) and the second nozzle portion (310) 5 and 6 are planar views of changes in the nozzle length (Lc / Wc), which is the length (Lc) compared to the one-side width (Wc) of the first nozzle portion (210) and the second nozzle portion (310). This is an analysis image showing the distribution of dye mass fraction. In FIG. 5, the nozzle length (Lc / Wc) was formed as 0.41, the electric field (E) was applied at 400 (V / cm), (a) is the first channel 200, and (b) is The second channel 300. In FIG. 6, the nozzle length (Lc / Wc) was formed as 1.67, the electric field (E) was applied at 400 (V / cm), (a) is the first channel 200, and (b) The second channel 300.

4 to 6, it can be seen that as the size of the nozzle length (Lc / Wc) increases within the range of 0.41 to 2.00, the mixing performance is improved, as shown in the graph of FIG. 4. Also, it can be seen that the dye mass fraction distribution of FIG. 6 formed with the nozzle length Lc / Wc longer than the nozzle length Lc / Wc of FIG. 5 was formed lower than the dye mass fraction distribution of FIG. 5, and the nozzle length Lc / It can be seen that the mixing performance of the fluid of FIG. 6 formed with a long Wc) was improved. More specifically, the size of the nozzle length (Lc / Wc) is mixed as the length (Lc) of the first nozzle portion 210 and the second nozzle portion 310 within the range of 0.41 to 2.00 It can be seen that the performance is improved by about 12% increase, and it can be confirmed that the mixing index can be improved by reducing the diffusion distance between the mixed fluids as the size of the nozzle length Lc / Wc increases. On the other hand, it can be seen that the increase rate of the mixing index decreases as the nozzle length Lc / Wc increases. Therefore, the nozzle length (Lc / Wc), which is the length (Lc) compared to the one-side width (Wc) of the first nozzle portion (210) and the second nozzle portion (310), is formed in the range of 0.41 to 2.00. The length (Lc) of the nozzle unit 210 and the second nozzle unit 310 is formed in an appropriate range in which the contact interface region of the fluid is enlarged and a diffusion distance is reduced, so that mixing performance can be improved.

On the other hand, Figure 7 shows the relationship between the mixing performance of the fluid and the nozzle end width (Wn / Wc) of the other side width (Wn) compared to one side width (Wc) of the first nozzle portion (210) and the second nozzle portion (310). 8 and 9 are changes in the nozzle end width (Wn / Wc), which is the other side width (Wn) compared to one side width (Wc) of the first nozzle portion (210) and the second nozzle portion (310). This is an analysis image showing the distribution of the dye mass fraction on a plane for. In FIG. 8, the nozzle end width (Wn / Wc) was formed as 0.27, the electric field (E) was induced to 400 (V / cm), (a) is the first channel 200, and (b) The second channel 300. In addition, in Figure 9, the nozzle end width (Wn / Wc) is formed of 0.13, the electric field (E) is applied to 400 (V / cm), (a) is the first channel 200, (b) Is the second channel 300.

Referring to FIGS. 7 to 9, as can be seen from the graph of FIG. 7, it can be seen that the mixing performance is improved as the size of the nozzle end width (Wn / Wc) decreases within the range of 0.13 to 0.47. . In addition, it can be seen that the dye mass fraction distribution of FIG. 9 formed with the nozzle end width (Wn / Wc) smaller than the nozzle end width (Wn / Wc) of FIG. 8 is formed, and the nozzle end width of the nozzle mass. It can be seen that the mixing performance of the fluid of FIG. 9 formed of (Wn / Wc) was improved. More specifically, as the nozzle end width (Wn / Wc) decreased from 0.47 to 0.27, the mixing index increased linearly by about 9.68%, and when the nozzle end width (Wn / Wc) further decreased from 0.27 to 0.13 The mixing index can be confirmed to increase by 2.6%, and as the size of the nozzle end width (Wn / Wc) decreases, the diffusion distance between the mixed fluids near the nozzle end decreases, thereby improving diffusion mixing and overall mixing performance. It can be confirmed that the mixing index can be improved by reducing the bulk fluid velocity by increasing the flow resistance. On the other hand, it can be seen that the increase rate of the mixing index decreases as the nozzle end width (Wn / Wc) decreases. Accordingly, the nozzle end width Wn / Wc, which is the other width Wn of one side width Wc of the first nozzle portion 210 and the second nozzle portion 310, is formed within the range of 0.13 to 0.47, The other width Wn of the first nozzle part 210 and the second nozzle part 310 is reduced to a diffusion distance between mixed fluids near the nozzle end to form a proper range to improve diffusion mixing and overall mixing performance. Therefore, the mixing performance can be improved.

On the other hand, Figure 10 is a graph comparing the mixing performance of the micro-mixer formed by the initial design (Reference design) and the mixing performance of the micro-mixer (10; Optimum design) formed to the optimal size derived based on the parametric analysis (Parametric analysis) to be. The nozzle length (Lc / Wc) of the optimal micromixer 10 is 1.67, the nozzle end width (Wn / Wc) is 0.2, one side of the first nozzle portion 210 and the second nozzle portion 310 The mixed flow path length Ld / Wc, which is the length Ld of the first mixed flow path 220 and the second mixed flow path 320 compared to the width Wc, was set to 0.26, and the electric field E was 400 (V). / cm) was induced.

As shown in FIG. 10, it can be seen that the optimal micromixer 10 exhibits excellent mixing performance based on the initial design. If it is more, the optimal micromixer 10 has improved the mixing index by about 21% compared to the reference design, and the mixing index within 60% on one side of the first channel 200 and the second channel 300 is the above. It can be seen that it was achieved at about 89% on the other side of the first channel 200 and the second channel 300. That is, in the micromixer 10 of the present invention, the nozzle length (Lc / Wc) range is formed from 0.41 to 2.00, and the range of the nozzle end width (Wn / Wc) is formed from 0.13 to 0.47, thereby A small value of the nozzle end width (Wn / Wc) reduces the diffusion distance, and a large value of the nozzle length (Lc / Wc) provides a large interfacial area to improve the mixing process, so that the first channel 200 and the The flow pattern inside the second channel 300 can be appropriately utilized to increase mixing performance.

The discharge unit 400 is configured to receive and discharge the mixed fluid from the first channel 200 and the second channel 300, the discharge unit 400 is the first channel 200 and It is formed at the other end of the second channel 300. That is, the discharge part 400 moves along the first channel 200 and the second channel 300 to receive and discharge the mixed fluid.

The electric field induction unit 500 is configured to induce an electric field in the first channel 200 and the second channel 300, and the electric field induction unit 500 includes a first electrode unit 510, a second electrode unit 520, a third electrode unit 530, and a fourth electrode unit 540.

Referring to FIG. 11, the first electrode unit 510 applies an -electrode to the upper surface of the first nozzle channel 211 and the lower surface of the second nozzle channel 212, and the second electrode unit 520 A + electrode is applied to the lower surface of the first nozzle flow path 211 and the upper surface of the second nozzle flow path 212. In addition, the third electrode unit 530 applies a -electrode to the lower surface of the third nozzle channel 311 and the upper surface of the fourth nozzle channel 312, and the fourth electrode unit 540 is the third electrode A + electrode is applied to the upper surface of the nozzle passage 311 and the lower surface of the fourth nozzle passage 312. That is, the electric field induction part 500 is formed in the lower surface of the first nozzle passage 211 formed of the inclined surface among the first nozzle part 210 and the second nozzle part 310, and of the second nozzle passage 212. A + electrode is applied inside the upper surface, and a -electrode is applied to the upper surface of the first nozzle channel 211 and the second nozzle channel 212 formed in a plane, so that the first nozzle unit 210 and the second Inducing an electric field inside the nozzle unit 310, the fluid can be smoothly moved using an electric osmotic pressure method, so that mixing efficiency can be increased.

The micro-mixer according to the present invention, the first nozzle portion and the second nozzle portion are formed such that the cross-sectional area is narrowed along the direction of the fluid, the first nozzle flow path, the first mixing flow path, the second nozzle flow path and the third nozzle flow path, The second mixing flow path and the fourth nozzle flow path are sequentially and repeatedly arranged, thereby separating and spreading the fluid repeatedly, thereby improving mixing efficiency.

In addition, since an electric field is formed in the first channel and the second channel, the fluid can be mixed in an electro-osmotic manner, so that the mixing efficiency can be increased.

In addition, the nozzle length (Lc / Wc) is formed to a size of 0.41 to 2.00, and the nozzle end width (Wn / Wc) is formed to a size of 0.13 to 0.47 to provide optimal dimensions of the micromixer capable of increasing mixing performance. It is possible to hire.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10: micromixer 100: inlet
110: to the first fluid 120: to the second fluid
130: mixed flow path 200: first channel
210: first nozzle unit 211: first nozzle euro
212: Second nozzle flow path 220: First mixed flow path
300: second channel 310: second nozzle unit
311: 3rd nozzle euro 312: 4th nozzle euro
320: second mixed flow path 400: outlet
500: electric field induction unit 510: first electrode unit
520: second electrode portion 530: third electrode portion
540: fourth electrode portion

Claims (8)

The first fluid passage and the second fluid passage through which different fluids flow, respectively, one side communicates with the first fluid passage and the second fluid passage, respectively, and the other side communicates with one side of the first nozzle part and the second nozzle part. An inlet portion including a mixed inlet path for introducing a fluid into the first nozzle portion and the second nozzle portion, respectively;
The first nozzle flow path is formed so that the cross-sectional area is narrowed according to the flow direction of the fluid from the inlet, and the lower surface is inclined upward from one side to the other, and the upper surface is inclined downward from one side to the other. A first nozzle unit including two nozzle flow paths, the first nozzle flow path, the first mixed flow path, and the second nozzle flow path being repeatedly disposed;
A first channel in which a plurality of the first nozzle portions are formed in a continuous iteration along the flow direction of the fluid;
The third nozzle flow path is formed to receive the fluid from the inlet, and the upper surface is inclined downward from one side to the other, so that the cross-sectional area is narrowed according to the direction of the fluid, and the lower surface is formed to incline upward from one side to the other. A second nozzle part including a fourth nozzle flow passage, the third nozzle flow passage, the second mixed flow passage, and the fourth nozzle flow passage being repeatedly arranged;
A second channel in which a plurality of the second nozzle parts are formed in a continuous iteration along the flow direction of the fluid;
A first electrode unit for applying a -electrode to an upper surface of the first nozzle flow path and a lower surface of the second nozzle flow path, and a second to apply a + electrode to the lower surface of the first nozzle flow path and the upper surface of the second nozzle flow path An electrode portion, a third electrode portion for applying a -electrode to the lower surface of the third nozzle flow path and the upper surface of the fourth nozzle flow path, and a + electrode to the upper surface of the third nozzle flow path and the lower surface of the fourth nozzle flow path An electric field induction unit including a fourth electrode unit to be applied; And
Including the discharge portion for receiving and discharging the fluid mixed in the first channel and the second channel,
The different fluids are separated from the first nozzle portion and the second nozzle portion, and are mixed by diffusion in the first mixing flow path and the second mixing flow path, thereby performing separation and diffusion mixing. delete delete delete delete delete The method according to claim 1,
The first nozzle portion and the second nozzle portion,
The range of the nozzle length (Lc / Wc), which is the length (Lc) compared to the one-side width (Wc) of the first nozzle portion and the second nozzle portion, is a micro-mixer formed from 0.41 to 2.00. The method according to claim 1,
The first nozzle portion and the second nozzle portion,
The range of the nozzle end width (Wn / Wc), which is the width of the other side (Wn) compared to one side width (Wc) of the first nozzle portion and the second nozzle portion, is a micro-mixer formed of 0.13 to 0.47.

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