CN102553480A

CN102553480A - Micro mixer

Info

Publication number: CN102553480A
Application number: CN2011104425331A
Authority: CN
Inventors: 杜春林
Original assignee: LIYANG AOGU INFORMATION TECHNOLOGY Co Ltd
Current assignee: LIYANG AOGU INFORMATION TECHNOLOGY Co Ltd
Priority date: 2011-12-26
Filing date: 2011-12-26
Publication date: 2012-07-11
Anticipated expiration: 2031-12-26
Also published as: CN102553480B

Abstract

The invention discloses a micro mixer with low manufacturing cost and high mixing efficiency. The micro mixer comprises a main body and a vibrating element, wherein the main body comprises a plurality of first chambers, a vibrating chamber, a mixed runner, a second chamber, a transmission runner, a plurality of lugs, a first decreasing block and a second decreasing block; fluid is accommodated in the first chamber; one end of the mixed runner is connected with the first chambers, and the other end of the mixed runner is connected with the vibrating chamber; one end of the transmission runner is connected with the vibrating chamber, and the other end of the transmission runner is connected with the second chamber; the lugs are staggered on two opposite inner walls of the mixed runner; the first decreasing block is arranged on the inner wall of the mixed runner, and the sectional area of the first decreasing block close to the vibrating chamber is smaller than the sectional area far away from the vibrating chamber; the second decreasing block is arranged on the inner wall of the transmission runner, and the sectional area of the second first decreasing block close to the second chamber is smaller than the sectional area far away from the second chamber; the vibrating element opposite to the vibrating chamber is positioned on the surface of the main body; and the vibrating element is used for receiving electronic signals to generate vibration, so that the volume of the vibrating chamber is changed, and the fluid is pumped to the second chamber from the first chambers.

Description

Micro-mixer

Technical field

The present invention relates to a kind of blender, relate in particular to a kind of micro-mixer.

Background technology

Along with the development of nanosecond science and technology, micro-electromechanical technology is widely used in a plurality of fields.At biological field, the biochip of bulk information and quick test has appearred storing, and it can realize functions such as sampling, transmission, screening, separation, mixing and detection.In the existing design, the micro-mixer in the biochip adopts the passive type mixed mechanism to obtain mostly, thereby it will utilize the geometry of runner in the wafer to increase the purpose that level of disruption in the flow field reaches mixing.In addition, also have in biochip, to add active element, just adopt active mixed mechanism to obtain checking the mixing between the body.Above-mentioned active or passive type all needs outside biochip, to connect micropump, and this micropump drives the check body and flows.But the mixing efficiency in practical application of the micro-mixer in these biochips is low, and complex structure, and manufacturing cost is high, is unfavorable for promoting the use of.

Summary of the invention

The invention discloses the high micro-mixer of a kind of low cost of manufacture and mixing efficiency.

Micro-mixer of the present invention comprises main body and vibrating elements, this main body comprises a plurality of first chambers, vibration chamber, mixes runner, second chamber, transmission runner, a plurality of projection, first successively decrease piece and second successively decreases piece.Wherein, the first chamber housing fluid; An end that mixes runner is connected with first chamber, and the other end is connected with the vibration chamber; One end of transmission runner is connected with the vibration chamber, and the other end is connected with second chamber.These a plurality of projections are crisscross arranged on the two opposite inner walls of mixing runner; First piece that successively decreases is arranged on the inwall that mixes runner, first successively decrease piece near the sectional area of vibration chamber less than sectional area away from the vibration chamber; Second piece that successively decreases is arranged on the inwall of transmission runner, second successively decrease piece near the sectional area of second chamber less than sectional area away from second chamber; The corresponding vibration of vibrating elements chamber is positioned on the surface of main body; Vibrating elements receives electronic signal generation vibration makes the volume of vibration chamber change, thereby fluid is drawn to second chamber from first cavity pump.

In one embodiment, fluid is gas, liquid or gas liquid mixture.

In one embodiment, this vibrating elements is a piezoelectric membrane etc.

In one embodiment, this micro-mixer comprises a plurality of first piece that successively decreases, and is arranged on the inwall that mixes runner.

In one embodiment, this micro-mixer comprises a plurality of second piece that successively decreases, and is arranged on the inwall of transmission runner.

In one embodiment, this projection successively decreases between piece and the vibration chamber first.

Micro-mixer of the present invention is owing to be arranged on vibrating elements on the surface of main body; First piece and second piece that successively decreases that successively decreases is separately positioned on the inwall that mixes runner and transmission runner, thereby can makes liquid or gas in the blender flow through the vibration of vibrating elements towards fixed-direction.In addition, micro-mixer of the present invention is provided with a plurality of staggered projections mixing on the two relative inwalls of runner, thereby can make between the liquid, mix quickly between the gas or between the gas liquid.

Description of drawings

Fig. 1 is the structural representation of micro-mixer of the present invention.

Fig. 2 is the sectional view of Fig. 1 along A-A '.

Fig. 3 is the sectional view of micro-mixer when the vibration cavity volume increases of Fig. 2.

Fig. 4 is the sectional view of micro-mixer when the vibration cavity volume is dwindled of Fig. 2.

The specific embodiment

In order to make the object of the invention, technical scheme and advantage clearer,, little mixing of the present invention worked being further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.

As illustrated in fig. 1 and 2, micro-mixer 1 comprises main body 2 and vibrating elements 3.Main body 2 comprises upper substrate 2a and infrabasal plate 2b, and upper substrate 2a is arranged on the composition surface 2c of infrabasal plate 2b.The material of upper substrate 2a and infrabasal plate 2b is a glass, silicon wafer, acrylic, PMMA etc.

Infrabasal plate 2b has relief pattern; Relief pattern is positioned on the composition surface 2c of itself and infrabasal plate 2b; Through this relief pattern between upper substrate 2a and infrabasal plate 2b, form a plurality of first chambers 21, vibration chamber 22, mix runner 23, second chamber 24, transmission runner 25, a plurality of projection 26, the first successively decrease piece 27 and second piece 28 that successively decreases.

In other embodiments, relief pattern can be formed on the upper substrate 2a.Also can on upper substrate 2a and infrabasal plate 2b, all form relief pattern.

A plurality of first chambers 21 can hold multiple fluid.This fluid comprises gas or liquid.

An end that mixes runner 23 is connected with first chamber 21, and the other end is connected with vibration chamber 22.

One end of transmission runner 25 is connected with vibration chamber 22, and the other end is connected with second chamber 24.

Projection 26 is crisscross arranged on the two opposite inner walls of mixing runner 23.The cross sectional shape of projection 26 comprises triangle, rectangle, trapezoidal etc.

First piece 27 that successively decreases is arranged on the inwall that mixes runner 23, first successively decrease piece 27 near the sectional area of vibration chamber 22 less than sectional area away from vibration chamber 22.First successively decrease piece 27 cross sectional shape can be any geometry that sectional area successively decreases, for example taper, trapezoidal etc.First piece 27 that successively decreases can have a plurality of.

Second piece 28 that successively decreases is arranged on the inwall of transmission runner 25, second successively decrease piece 28 near the sectional area of second chamber 24 less than sectional area away from second chamber 24.Second successively decrease piece 28 cross sectional shape can be that the cross section connects any geometry of successively decreasing, for example taper, trapezoidal etc.Second piece 28 that successively decreases can have a plurality of.

Vibrating elements 3 is positioned on the surface of infrabasal plate 2b, and the position of vibrating elements 3 is corresponding to vibration chamber 23.Vibrating elements 3 can be a piezoelectric membrane.Vibrating elements 3 receives electronic signal, on direction of vibration, produces double vibrations.

In addition, micro-mixer 1 also comprises input pipe 4 and efferent duct 5.When vibrating elements 3 vibrations, fluid flows in first chamber 21 through input pipe 4, after micro-mixer 1 mixes, outside efferent duct 5 exports micro-mixer 1 to.

Operation principle below in conjunction with Fig. 3 and 4 explanation micro-mixers.

When vibrating elements 3 downwarpings; Vibration chamber 22 receives the driving of vibrating elements 3 and volume increases; Fluid in the micro-mixer 1 flows to vibration chamber 22 from first chamber 21 and second chamber 24; Fluid receives first resistance when successively decreasing piece 27 through first, receives second resistance when successively decreasing piece 28 through second.Wherein, when fluid successively decreases piece 27 through first, first successively decrease piece 27 and the inwall that mixes runner 23 distance increase gradually; Therefore when fluid successively decreased piece 28 through second, second distance of successively decreasing between the inwall of piece 28 and transmission runner 25 reduced gradually, and first resistance is less than second resistance.Therefore, the flow of fluid that flows to vibration chambers 22 from first chamber 21 is greater than the flow that flows to the fluid of vibration chambers 22 from second chamber 24.

When vibrating elements 3 is bent upwards; Vibration chamber 22 receives the driving of vibrating elements 3 and volume reduces; Fluid in the micro-mixer 1 flows to first chamber 21 and second chamber 24 from vibration chamber 22; Fluid receives the 3rd resistance when successively decreasing piece 27 through first, receives the 4th resistance when successively decreasing piece 28 through second.Wherein, when fluid successively decreases piece 27 through first, first successively decrease piece 27 and the inwall that mixes runner 27 distance reduce gradually; Therefore when fluid successively decreased piece 28 through second, second distance of successively decreasing between the inwall of piece 28 and transmission runner 25 increased gradually, and the 3rd resistance is greater than the 4th resistance.Therefore, the flow of fluid that flows to first chamber 21 from vibration chamber 22 is less than flowing to the flow of the fluid of second chamber 24 from vibration chamber 22.

Therefore, after vibrating elements 3 received electronic signal generation double vibrations, the fluid in the micro-mixer 1 flowed to second chamber 24 from first chamber 21 on the whole.

In addition, because 26 pairs of projections mix influence on flow field in the runner 23, fluid can receive staggered disturbance in mixing runner 23, so the contact area between the fluid increases.Simultaneously, produce the recirculating zone between the projection 26, make the refluxed influence of effect of fluid strengthen mixing efficiency.

In sum, micro-mixer of the present invention has following advantage:

Have a plurality of staggered projections owing to mix in the runner, therefore can in extremely short distance, evenly and expeditiously mix two or more fluids.

Owing to adopt vibrating elements to drive the volume-variation of vibration chamber, therefore do not need external fluid to promote equipment, thereby be easy to carry, easy-to-use.

Because micro-mixer is simple in structure, so its low cost of manufacture.

The above specific embodiment only is used to describe the technical scheme of micro-mixer of the present invention; Be not used in qualification the present invention; Those skilled in the art can obtain various modification and combination, so protection scope of the present invention are as the criterion with claims in not departing from the scope of the present invention.

Claims

1. a micro-mixer is characterized in that, this micro-mixer comprises main body and vibrating elements, wherein,

This main body comprises a plurality of first chambers, vibration chamber, mixes runner, second chamber, transmission runner, a plurality of projection, first successively decrease piece and second successively decreases piece;

This first chamber housing fluid;

This end that mixes runner is connected with this first chamber, and the other end is connected with this vibration chamber;

One end of this transmission runner is connected with this vibration chamber, and the other end is connected with this second chamber;

These a plurality of projections are crisscross arranged on the two opposite inner walls of this mixing runner;

This first piece that successively decreases is arranged on the inwall of this mixing runner, this first successively decrease piece near the sectional area of this vibration chamber less than sectional area away from this vibration chamber;

This second piece that successively decreases is arranged on the inwall of this transmission runner, this second successively decrease piece near the sectional area of this second chamber less than sectional area away from this second chamber;

This vibrating elements is to being positioned on the surface of this main body the vibration cavity chamber, and this vibrating elements receives electronic signal generation vibration makes the volume of this vibration chamber change, thereby this fluid is transferred to this second chamber from this first chamber.

2. micro-mixer as claimed in claim 1 is characterized in that, this fluid is gas, liquid or gas liquid mixture.

3. like each described micro-mixer in the claim 1～2, it is characterized in that this vibrating elements is a piezoelectric membrane etc.

4. like each described micro-mixer in the claim 1～3, it is characterized in that, comprise a plurality of these first pieces that successively decrease, be arranged on the inwall of this mixing runner.

5. like each described micro-mixer in the claim 1～4, it is characterized in that, comprise a plurality of these second pieces that successively decrease, be arranged on the inwall of this transmission runner.

6. like each described micro-mixer in the claim 1～5, it is characterized in that this projection first successively decreases between piece and this vibration chamber at this.