CN116943497A - Passive micromixer with heart-shaped function structure - Google Patents
Passive micromixer with heart-shaped function structure Download PDFInfo
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- CN116943497A CN116943497A CN202311042169.9A CN202311042169A CN116943497A CN 116943497 A CN116943497 A CN 116943497A CN 202311042169 A CN202311042169 A CN 202311042169A CN 116943497 A CN116943497 A CN 116943497A
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- 239000012530 fluid Substances 0.000 claims abstract description 61
- 238000002156 mixing Methods 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000006870 function Effects 0.000 claims description 59
- 230000004217 heart function Effects 0.000 claims description 6
- 239000011295 pitch Substances 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 238000009825 accumulation Methods 0.000 claims description 3
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/30—Micromixers
- B01F33/301—Micromixers using specific means for arranging the streams to be mixed, e.g. channel geometries or dispositions
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Abstract
The invention discloses a passive micromixer with a heart-shaped function structure, which comprises a first fluid inlet channel (1), a second fluid inlet channel (2), a primary mixing channel (3), a micromixer unit group (M) and an outlet channel (4), wherein the micromixer unit group comprises a plurality of heart-shaped function micromixer units (5) which are sequentially connected end to end in a smooth manner, and a combined channel formed by main channels of the first heart-shaped function micromixer units and the second heart-shaped function micromixer units is in a structure of gradually shrinking first and then gradually expanding; the method is characterized in that: the heart-shaped function micromixer unit comprises a main channel, a first diversion channel (8) and a second diversion channel (9). The invention makes the fluid generate secondary flow and vortex with different dimensions in the main channel, and simultaneously makes the fluid continuously split and merge by the split channel, thereby aggravating unbalanced collision between the fluids, generating chaotic convection and vortex-induced mixed flow, improving mixing strength, shortening flow channel length, reducing mixing time and improving mixing effect.
Description
Technical Field
The invention relates to the technical field of microfluid mixing, in particular to a passive micromixer with a heart-shaped function structure.
Background
Microfluidic chip technology can operate the functions of separation, sample addition, mixing, reaction, detection, etc. in the laboratory analysis and detection process in a micrometer scale space, so that the microfluidic chip is also called a lab-on-a-chip. The microfluidic mixer is one of important components of a microfluidic chip, and the closed microchannel and chamber can isolate human contact with reagents, so that the safety of human personnel is ensured and the reagents are prevented from being polluted. Compared with a macroscopic mixer, the microfluidic mixer has the advantages of high-efficiency heat transfer, high-speed mixing, rapid system response, high safety performance and the like, and is widely applied to a plurality of fields of medicine, chemical industry, food and the like.
At present, microfluidic mixers are classified into active and passive micro-mixers according to whether external energy is required to enhance a mixing effect. The active micromixer requires external dynamic forces, such as sound fields, electric fields, magnetohydrodynamic fields, mechanical stirring, etc., in addition to the energy of the pumped fluid to achieve the desired mixing effect on the disturbance of the fluid in the microchannel. The active micromixer has the disadvantages of high manufacturing difficulty, high processing cost, heat generated by driving of sound field, electric field and the like, and unnecessary side reactions of reagents possibly generated. Passive micromixers require no external energy drive other than the energy of the pumped fluid, and rely primarily on special geometric channels to promote fluid mixing, such as converging diverging structures, stretch-fold structures, placement of obstructions within the channels, and the like. The device has the advantages of simple structure and easy processing and integration; the disadvantage is the need for a longer mixing channel, a relatively slow mixing speed and a longer mixing time.
For example, the prior art discloses passive micro-fluidic mixers including micro-mixers of the "serpentine", "S" type, etc., each of which has an equal, gradually decreasing or gradually increasing cross-sectional area of the fluid channel. However, the existing micromixer still has the problems of relatively slow mixing speed and relatively long mixing time.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a passive micromixer with a heart-shaped function structure, wherein two heart-shaped functions with different curvatures form a special channel structure with contraction and expansion, so that secondary flow and vortexes with different dimensions appear in a main channel of fluid (liquid), meanwhile, the fluid is continuously split and converged by a split channel (a first split channel and/or a second split channel), unbalanced collision among the fluids is aggravated, chaotic convection and vortex-induced mixed flow are generated, the mixing intensity is improved, the length of a flow channel is shortened, the mixing time is shortened, and the mixing effect is improved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the passive micromixer with the heart-shaped function structure comprises a first fluid inlet channel (1), a second fluid inlet channel (2), a primary mixing channel (3), a micromixer unit group (M) and an outlet channel (4), wherein the first fluid inlet channel and the second fluid inlet channel are connected with the primary mixing channel, the micromixer unit group comprises a plurality of heart-shaped function micromixer units (5) which are sequentially and smoothly connected end to end, the downstream end of the micromixer unit group is connected with the outlet channel, the downstream end of the primary mixing channel is connected with a first inlet end (51) of the heart-shaped function micromixer unit, a first outlet end (52) of the heart-shaped function micromixer unit is connected with a first inlet end of the next heart-shaped function micromixer unit, and a combined channel formed by main channels of the first heart-shaped function micromixer unit and the second heart-shaped function micromixer unit is in a structure that the combined channel is gradually contracted and then gradually expanded; the method is characterized in that: the heart-shaped function micromixer unit (5) comprises a main channel, a first flow distribution channel (8) and a second flow distribution channel (9), wherein the main channel consists of a first heart-shaped function curve (6) and a second heart-shaped function curve (7), the inlet end of the first flow distribution channel is connected to the left upper side of the main channel, the outlet end of the first flow distribution channel is connected to the right lower side of the main channel, and the first flow distribution channel is linear; the second inlet end (91) of the second diversion channel is connected to the right lower side of the main channel and is positioned at the downstream of the outlet end of the first diversion channel, the second outlet end (92) of the second diversion channel is connected to the right side of the main channel and is positioned at the upstream of the outlet end of the first diversion channel, the second diversion channel is in a fan shape of more than 180 degrees, and the first diversion channel and the second diversion channel are positioned in different planes.
Further, the polar equation of the first cardioid curve (6) is：r 1 ＝a 1 The polar equation for the second cardioid curve (7) is: r is (r) 2 ＝a 2 (1+cos θ), wherein the value of parameter a determines the magnitude of the curve of the heart function, the larger the value of a, the larger the curve; a is a constant which is constantly larger than zero, the value range of theta is 0 to pi, and in order to ensure that the integral channel profile of the heart-shaped function micromixer unit presents continuous shrinkage and expansion trend, a 1 And a 2 The value of (2) must satisfy: a, a 1 ＞a 2 And a is more than or equal to 5 mu m 1 -a 2 ≤15μm；r 1 ＞0，r 2 The main channel curve of a cardioid micromixer unit is centrosymmetric with respect to the midpoint of their junction with the main channel curve of the next cardioid micromixer unit adjacent thereto.
Further, the micromixer unit group (M) comprises four, six or eight heart-shaped function micromixer units (5) which are sequentially connected end to end in a smooth manner, and a first inlet end (51) and a first outlet end (52) of each heart-shaped function micromixer unit are positioned on a central axis (X-X); the first fluid inlet channel and the second fluid inlet channel are arranged in a collinear way to form an included angle of 180 degrees, the contour line of the upper side of the primary mixing channel (3) is arranged in a collinear way with the central axis, and the contour line of the lower side of the outlet channel (4) is arranged in a collinear way with the central axis; the heart-shaped function micro-mixer units (5) positioned on the upper side of the central axis (X-X) comprise a main channel, a first diversion channel (8) and a second diversion channel (8), and the heart-shaped function micro-mixer units positioned on the lower side of the central axis comprise the main channel and the second diversion channel.
Further, the heart function micromixer unit (5) further includes a micro concave-convex corrugated portion (71) which is provided at an upstream portion of the second heart function curve (7), and which extends from the first inlet end (51) to an inlet end of the first split flow passage (8).
Further, the micro concave-convex corrugated part (71) has a corrugated structure with two or more sections of different pitches, and the pitch of the corrugated section positioned at the side of the first inlet end (51) is smaller than that of the corrugated section positioned at the side of the inlet end of the first diversion channel (8).
Further, an accumulation cavity (81) is arranged at the middle part or the left side of the first diversion channel (8), and the accumulation cavity is circular.
Further, after the fluid in the first diversion channel (8) flows out from the outlet end, part of the fluid is reflected by the wall part of the first heart function curve (6) and flows back to the second diversion channel (9) at a position approximately corresponding to the second inlet end (91).
Further, the second diversion channel (9) of the first cardioid micromixer unit (5) and the second diversion channel of the second cardioid micromixer unit are arranged in central symmetry with respect to the midpoint of the first outlet end (52), and the inlet end of the second diversion channel of the second cardioid micromixer unit is located at the downstream side of the outlet end.
Further, the concave-convex corrugation part (71) of the first heart-shaped function micro-mixer unit (5) and the concave-convex corrugation part of the second heart-shaped function micro-mixer unit are arranged symmetrically with respect to the center point of the first outlet end (52); the widths of the first fluid inlet channel, the second fluid inlet channel, the preliminary mixing channel and the outlet channel are kept consistent and are larger than the cross-sectional widths of the first diversion channel (8) and the second diversion channel (9).
Further, the width of the first inlet end (51) is 1.2-1.6 times of the width of the first outlet end (52), the width of the first outlet end is 1.8-2.2 times of the width of the second diversion channel (9), and the included angle between the first diversion channel (8) and the central axis (X-X) is 13-17 degrees.
According to the passive micromixer with the heart-shaped function structure, two heart-shaped functions with different curvatures form a special channel structure with contraction and expansion, so that secondary flow and vortexes with different dimensions appear in a main channel of fluid (liquid), meanwhile, the fluid is continuously split and converged by a split channel (a first split channel and/or a second split channel), unbalanced collision among the fluids is aggravated, chaotic convection and vortex-induced mixed flow are generated, mixing intensity is improved, the length of a flow channel is shortened, mixing time is shortened, and mixing effect is improved. Through the setting of unsmooth ripple portion, can promote the boundary layer flow liquid in the main channel to flow in to first reposition of redundant personnel passageway for liquid in the first reposition of redundant personnel passageway has certain flow, velocity of flow, thereby can improve efflux, chaotic convection, vortex-induced mixing flow effect.
Drawings
FIG. 1 is a schematic diagram of a passive micromixer of the cardioid structure of the present invention;
FIG. 2 is a schematic diagram of the partial structure of a passive micromixer with a cardioid function structure according to the present invention;
FIG. 3 is a schematic diagram of the partial structure of a passive micromixer with a cardioid function structure according to the present invention.
In the figure: a first fluid inlet channel 1, a second fluid inlet channel 2, a preliminary mixing channel 3, an outlet channel 4, a micromixer unit 5 (of a first of the mixing units of a cardioid structure), a first cardioid curve 6, a second cardioid curve 7, a first split channel 8, a second split channel 9, a first inlet end 51, a first outlet end 52, a micro concave-convex corrugation 71, an accumulator chamber 81, a second inlet end 91, a second outlet end 92; micro mixer unit group M, central axis X-X.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1-3, a passive micromixer with a cardioid function structure comprises a first fluid inlet channel 1, a second fluid inlet channel 2, a primary mixing channel 3, a micromixer unit group M and an outlet channel 4, wherein the first fluid inlet channel 1 and the second fluid inlet channel 2 are connected with the primary mixing channel 3, the micromixer unit group M comprises a plurality of cardioid function micromixer units 5 which are sequentially connected end to end, the downstream end of the micromixer unit group M is connected with the outlet channel 4, the downstream end of the primary mixing channel 3 is connected with a first inlet end 51 of the cardioid function micromixer unit 5, a first outlet end 52 of the cardioid function micromixer unit 5 is connected with a first inlet end 51 of the next cardioid function micromixer unit 5, and a combined channel formed by main channels of the first cardioid function micromixer unit 5 is in a structure that the combination channels are gradually contracted and then gradually expanded; the method is characterized in that: the cardioid micromixer unit 5 comprises a main channel, a first split channel 8, and a second split channel 9, the main channel is formed by a first cardioid curve 6 and a second cardioid curve 7, an inlet end of the first split channel 8 is connected to an upper left side of the main channel, an outlet end of the first split channel 8 is connected to a lower right side of the main channel, the first split channel 8 is linear, a second inlet end 91 of the second split channel 9 is connected to a lower right side of the main channel and is located downstream of the outlet end of the first split channel 8, a second outlet end 92 of the second split channel 9 is connected to a right side of the main channel and is located upstream of the outlet end of the first split channel 8, the second split channel 9 is in a fan/arc shape of more than 180 ° (preferably more than 245 °), and the first split channel 8 and the second split channel 9 are located in different planes (e.g., a plane in which the first split channel 8 is located above or below the second split channel 9).
The polar equation for the first cardioid curve 6 is: r is (r) 1 ＝a 1 The polar equation for the second cardioid curve 7 is: r is (r) 2 ＝a 2 And (1+cos theta), wherein the value of the parameter a determines the curve bending degree of the heart-shaped function, and the larger the value of a is, the larger the bending radian is. In this embodiment, a is a constant which is constantly greater than zero, θ is in the range of 0 to pi, and a is continuously contracted and expanded to ensure that the overall channel profile of the cardioid micromixer unit 5 presents a continuous contraction and expansion trend 1 And a 2 The value of (2) must satisfy: a, a 1 ＞a 2 And a is more than or equal to 5 mu m 1 -a 2 ≤15μm；r 1 ＞0，r 2 > 0, the main channel curves (6, 7) of a cardioid micromixer unit 5 and the main channel curves of the next cardioid micromixer unit 5 adjacent thereto are about the midpoint (pi, (a) 1 +a 2 ) (1+cos θ)/2) is centrosymmetric.
In this embodiment, the micromixer unit group M includes six heart-shaped function micromixer units 5 that are sequentially connected end to end in a smooth manner, and of course, the number of the heart-shaped function micromixer units may be smaller or larger than six, and the first inlet end 51 and the first outlet end 52 of each heart-shaped function micromixer unit 5 are located on the central axis X-X; the first fluid inlet channel 1 and the second fluid inlet channel 2 are arranged in a collinear way to form an included angle of 180 degrees, the contour line of the upper side of the primary mixing channel 3 is arranged in a collinear way with the central axis X-X, and the contour line of the lower side of the outlet channel 4 is arranged in a collinear way with the central axis X-X.
The cardioid micromixer units 5 (i.e., nos. 1, 3, 5, and 7.) located on the upper side of the central axis X-X each include a main channel, a first bypass channel 8, and a second bypass channel 9, and the cardioid micromixer units 5 (i.e., nos. 2, 4, 6, and 8.) located on the lower side of the central axis X-X each include a main channel, and a second bypass channel 9.
In an embodiment, the cardioid micromixer unit 5 further comprises a micro concave-convex corrugated portion 71, the micro concave-convex corrugated portion 71 is disposed at an upstream portion of the second cardioid curve 7, and the micro concave-convex corrugated portion 71 extends from the first inlet end 51 to the inlet end of the first split-flow channel 8.
Further, the micro concavo-convex corrugated portion 71 has a corrugated structure of two or more different pitches, and the pitch of the corrugated section on the side of the first inlet end 51 is smaller than that of the corrugated section on the side of the inlet end of the first split flow passage 8.
The first diverting passage 8 is provided with a pressure accumulating chamber 81 at a middle or left side thereof, and the pressure accumulating chamber 81 is circular.
Further, after the fluid in the first diversion channel 8 flows out from the outlet end, part of the fluid is reflected by the wall part of the first heart function curve 6 and flows back to the second diversion channel 9 at a position approximately corresponding to the second inlet end 91.
The second split flow channel 9 of the first cardioid micromixer unit 5 is arranged centrally symmetrically with respect to the midpoint of the first outlet end 52 with the second split flow channel 9 of the second cardioid micromixer unit 5, the inlet end of the second split flow channel 9 of the second cardioid micromixer unit 5 being located downstream of the outlet end.
The concave-convex corrugation 71 of the first cardioid micromixer unit 5 is centrally symmetrically arranged with respect to the midpoint of the first outlet end 52 with the concave-convex corrugation 71 of the second cardioid micromixer unit 5.
The widths of the first fluid inlet channel 1, the second fluid inlet channel 2, the preliminary mixing channel 3 and the outlet channel 4 are kept consistent and are larger than the cross-sectional widths of the first diversion channel 8 and the second diversion channel 9.
The width of the first inlet end 51 is 1.2-1.6 times (preferably 1.4 times) the width of the first outlet end 52, the width of the first outlet end 52 is 1.8-2.2 times (preferably 2.0 times) the width of the second flow dividing channel 9, and the angle of the first flow dividing channel 8 to the central axis X-X is 13-17 ° (preferably 15 °).
The invention relates to a passive micromixer with a heart-shaped function structure, which has the working principle that:
two different fluids (liquids) respectively flow into the primary mixing channel 3 through the first fluid inlet channel 1 and the second fluid inlet channel 2 to finish primary mixing, then flow into the heart-shaped function micromixer unit 5 through the primary mixing channel 3, after the fluids enter the heart-shaped function micromixer unit 5, the flow track of the fluids is changed, centrifugal force is generated under the action of the heart-shaped curve channel, radial velocity gradient is generated on the fluids, secondary flow and vortex with different dimensions are generated on the fluids under the special channel structure of shrinkage and expansion, and the contact area between the two fluids is enlarged. Meanwhile, each heart-shaped function micromixer unit 5 is provided with a first diversion channel 8 and/or a second diversion channel 9, fluid is continuously diverted and converged in the channels, a jet flow effect can be generated by the narrow diversion channels, chaotic convection and vortex-induced mixed flow can be generated between the fluid, so that two different fluids are mixed more fully and uniformly, a mixing process is completed after a plurality of shrinkage-expansion micromixer units are adopted, the liquid with better/higher mixing degree flows out of the outlet channels 4, the length of the flow channels is shortened, the mixing time is shortened, and the mixing effect is improved.
Through the disposition of the concave-convex corrugated portion 71, the boundary layer flowing liquid in the main channel can be promoted to flow into the first diversion channel 8, so that the liquid in the first diversion channel 8 has certain flow and flow velocity, and the jet flow, chaotic convection and vortex-induced mixed flow effects can be improved.
According to the passive micromixer with the heart-shaped function structure, two heart-shaped functions with different curvatures form a special channel structure with contraction and expansion, so that secondary flow and vortexes with different dimensions appear in a main channel of fluid (liquid), meanwhile, the fluid is continuously split and converged by a split channel (a first split channel and/or a second split channel), unbalanced collision among the fluids is aggravated, chaotic convection and vortex-induced mixed flow are generated, mixing intensity is improved, the length of a flow channel is shortened, mixing time is shortened, and mixing effect is improved.
It should be noted that, in the embodiments of the present invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship, movement situation, etc. between the components in a specific posture (as shown in the drawings), if the specific posture changes, the directional indicators correspondingly change, where the "connection" may be a direct connection or an indirect connection, and the "setting", "setting" may be a direct setting or an indirect setting.
The above-described embodiments are illustrative of the present invention and are not intended to be limiting, and it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents.
Claims (10)
1. The passive micromixer with the heart-shaped function structure comprises a first fluid inlet channel (1), a second fluid inlet channel (2), a primary mixing channel (3), a micromixer unit group (M) and an outlet channel (4), wherein the first fluid inlet channel and the second fluid inlet channel are connected with the primary mixing channel, the micromixer unit group comprises a plurality of heart-shaped function micromixer units (5) which are sequentially and smoothly connected end to end, the downstream end of the micromixer unit group is connected with the outlet channel, the downstream end of the primary mixing channel is connected with a first inlet end (51) of the heart-shaped function micromixer unit, a first outlet end (52) of the heart-shaped function micromixer unit is connected with a first inlet end of the next heart-shaped function micromixer unit, and a combined channel formed by main channels of the first heart-shaped function micromixer unit and the second heart-shaped function micromixer unit is in a structure that the combined channel is gradually contracted and then gradually expanded;
the method is characterized in that: the heart-shaped function micromixer unit (5) comprises a main channel, a first flow distribution channel (8) and a second flow distribution channel (9), wherein the main channel consists of a first heart-shaped function curve (6) and a second heart-shaped function curve (7), the inlet end of the first flow distribution channel is connected to the left upper side of the main channel, the outlet end of the first flow distribution channel is connected to the right lower side of the main channel, and the first flow distribution channel is linear; the second inlet end (91) of the second diversion channel is connected to the right lower side of the main channel and is positioned at the downstream of the outlet end of the first diversion channel, the second outlet end (92) of the second diversion channel is connected to the right side of the main channel and is positioned at the upstream of the outlet end of the first diversion channel, the second diversion channel is in a fan shape of more than 180 degrees, and the first diversion channel and the second diversion channel are positioned in different planes.
2. A passive micromixer of a cardioid structure according to claim 1, characterized in that the polar equation of the first cardioid curve (6) is: r is (r) 1 ＝a 1 The polar equation for the second cardioid curve (7) is: r is (r) 2 ＝a 2 (1+cos θ), wherein the value of parameter a determines the magnitude of the curve of the heart function, the larger the value of a, the larger the curve; a is a constant which is constantly larger than zero, the value range of theta is 0 to pi, and in order to ensure that the integral channel profile of the heart-shaped function micromixer unit presents continuous shrinkage and expansion trend, a 1 And a 2 The value of (2) must satisfy: a, a 1 ＞a 2 And a is more than or equal to 5 mu m 1 -a 2 ≤15μm；r 1 ＞0，r 2 > 0, the main channel curve of a cardioid micromixer unit and the main channel curve of the next cardioid micromixer unit adjacent thereto are about the midpoint of their junctionAnd the centers are symmetrical.
3. A passive micromixer of a cardioid structure according to claim 2, wherein the set (M) of micromixer units comprises four, six or eight cardioid micromixer units (5) connected end to end in a smooth sequence, each cardioid micromixer unit having a first inlet end (51), a first outlet end (52) located on a central axis (X-X); the first fluid inlet channel and the second fluid inlet channel are arranged in a collinear way to form an included angle of 180 degrees, the contour line of the upper side of the primary mixing channel (3) is arranged in a collinear way with the central axis, and the contour line of the lower side of the outlet channel (4) is arranged in a collinear way with the central axis; the heart-shaped function micro-mixer units (5) positioned on the upper side of the central axis (X-X) comprise a main channel, a first diversion channel (8) and a second diversion channel (8), and the heart-shaped function micro-mixer units positioned on the lower side of the central axis comprise the main channel and the second diversion channel.
4. A passive micromixer of a cardioid function configuration according to claim 1, wherein the cardioid function micromixer unit (5) further comprises a micro-relief corrugation (71) arranged at an upstream portion of the second cardioid function curve (7), and the micro-relief corrugation extends from the first inlet end (51) to the inlet end of the first shunt channel (8).
5. A passive micromixer having a cardioid function according to claim 4, wherein the micro-concave-convex corrugation (71) has a corrugation structure of two or more different pitches, and the pitch of the corrugation located on the side of the first inlet end (51) is smaller than that of the corrugation located on the side of the inlet end of the first distribution channel (8).
6. A passive micromixer of a cardioid structure according to claim 5, characterized in that the first shunt channel (8) is provided with a pressure accumulation chamber (81) in the middle or left position, which is circular.
7. A passive micromixer according to claim 6, wherein the fluid in the first flow distribution channel (8) flows out through the outlet end and then flows back to the second flow distribution channel (9) at a position substantially corresponding to the second inlet end (91) after being reflected by the wall of the first cardioid curve (6).
8. A passive micromixer of a cardioid structure according to claim 7, wherein the second flow diversion channel (9) of the first cardioid micromixer unit (5) is arranged centrally symmetrically to the second flow diversion channel of the second cardioid micromixer unit with respect to the midpoint of the first outlet end (52), the inlet end of the second flow diversion channel of the second cardioid micromixer unit being located downstream of the outlet end.
9. A passive micromixer of cardioid structure according to claim 8, wherein the male and female corrugations (71) of the first cardioid micromixer unit (5) are arranged centrally symmetrically to the male and female corrugations of the second cardioid micromixer unit with respect to the midpoint of the first outlet end (52); the widths of the first fluid inlet channel, the second fluid inlet channel, the preliminary mixing channel and the outlet channel are kept consistent and are larger than the cross-sectional widths of the first diversion channel (8) and the second diversion channel (9).
10. A passive micromixer according to claim 9, wherein the width of the first inlet end (51) is 1.2-1.6 times the width of the first outlet end (52), the width of the first outlet end is 1.8-2.2 times the width of the second flow dividing channel (9), and the angle between the first flow dividing channel (8) and the central axis (X-X) is 13-17 °.
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| CN202311042169.9A Pending CN116943497A (en) | 2023-08-18 | 2023-08-18 | Passive micromixer with heart-shaped function structure |
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