CN205938167U - Miniature valve of induced electroosmotic flow based on electrode drive - Google Patents
Miniature valve of induced electroosmotic flow based on electrode drive Download PDFInfo
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- CN205938167U CN205938167U CN201620826347.6U CN201620826347U CN205938167U CN 205938167 U CN205938167 U CN 205938167U CN 201620826347 U CN201620826347 U CN 201620826347U CN 205938167 U CN205938167 U CN 205938167U
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- resistance
- electricity piece
- piece
- electric
- microchannel
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- 238000005370 electroosmosis Methods 0.000 title abstract 2
- 230000005684 electric field Effects 0.000 claims abstract description 18
- 230000005611 electricity Effects 0.000 claims abstract description 16
- 230000006698 induction Effects 0.000 claims description 6
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Abstract
The utility model relates to a miniature valve of induced electroosmotic flow based on electrode drive belongs to the microfluidic system field. The utility model discloses a power, switch, resistance I, resistance II, electricity piece I, electricity piece II, medium and microchannel, the outer wall in the microchannel is installed to electricity piece I, electricity piece II, and electricity piece II is connected with II one end of resistance and power, and electricity piece I is connected between II other ends of resistance and resistance I one end, and I other end of resistance passes through the switch to be connected with the power, and electricity piece that closed switch then switched on I, electric II production electric fields influence mobile medium in the microchannel that has the electric field. The utility model discloses the device is simple, only needs the electricity piece, just can realize the switching action of little valve to its circular telegram, easy operation, measurement process only need the circular telegram of electricity piece.
Description
Technical field
This utility model is related to a kind of miniature valve of the induction EOF based on electrode drive, belongs to microfluid system neck
Domain.
Background technology
With scientific and technological development, micro-valve technology also improves constantly therewith, progressively occur in that various forms of active micro-valves and
Passive micro-valve.In recent years, the development of micro-valve was very rapid, and the performance of micro-valve also improves constantly, such as earial drainage, can compressive resistance, work(
Consumption, response time, bio-compatibility and disposable etc. are obtained for a certain degree of raising, but yet suffer from many need
, all also there is the shortcomings of leakage, complex structure, high cost in problem to be improved, such as the mechanical movable micro-valve such as piezoelectricity, magnetic, electrostatic.
But it is as range constantly to expand, people put forward higher requirement to illegal performance, several respects must be provided simultaneously with
Feature, such as in space probation application, micro-valve to have broader operating temperature range and at low temperature also can normal work, can hold
By bigger pressure differential；Require on disposable micro-fluid chip for personal diagnosis that structure is simple, miniaturization, multifunctional unit
And the performance such as cost degradation.For this patent as one of the main element of microfluid system, play Runoff adjustment, ON/OFF
The effect of conversion.Microfluid system, as an important branch of MEMS, refers to realize to complex fluid under microscopic dimensions
The system controlling, operating and detect.As one of the main element of microfluid system, its effect includes Runoff adjustment, opens micro-valve
Close conversion and sealing biomolecule, micro-/to receive particle, chemical reagent etc., its property includes No leakage, small volume, low in energy consumption, pressure drag
Greatly, react fast, can linear operation ability etc..
Content of the invention
This utility model provides a kind of miniature valve of the induction EOF based on electrode drive, for realizing micro-valve
On-off action.
The technical solution of the utility model is：A kind of miniature valve of the induction EOF based on electrode drive, including power supply
1st, switch 2, resistance I 3, resistance II 4, electric piece I 5, electric piece II 6, medium 7 and microchannel 9；
Described electricity piece I 5, electric piece II 6 are arranged on the outside wall surface of microchannel 9, and electric piece II 6 is connected with resistance II 4 one end and power supply 1
Connect, electric piece I 5 is connected between resistance II 4 other end and resistance I 3 one end, resistance I 3 other end passes through to switch 2 with power supply 1 even
Connect, the electric piece I 5 that closure switch 2 are then energized, electric piece II 6 produce electric field 8, and impact has Jie flowed in the microchannel 9 of electric field 8
Matter 7.
Operation principle of the present utility model is：
Non-metallic object typically all carries a certain amount of electric charge, when object is in electrolyte solution, due to electrostatic phase
Suction acts on, the contrary sign ion in object meeting adsorbing electrolyte solution, forms electric double layer (EDL) in body surface, deposits in EDL
In certain potential, referred to as zeta potential.The size of non-metallic object surface zeta potential potential and polarity uniformity and fixation
Constant, relevant with the attribute of material and the property of surrounding medium, unrelated with electric field intensity and present position.When non-metallic object is deposited
When in electric field, electric field can apply the ion that a power acts in EDL diffusion layer, drives ion and liquid flowing, this flowing
Referred to as EOF, its velocity magnitude is proportional with electric field strength.But when object is the good metal of electric conductivity, power up outward
Under field action, metal can polarize, and metal inside can induce negative charge near electric field positive pole side, and opposite side then can lure
Derive the positive charge of equivalent.Meanwhile, due to the presence of induced charge, metal object surface can be correspondingly in adsorbent solution
Contrary sign ion, finally the solid-liquid interface in conductive body form stable EDL.EDL can repel electric field line, so that electric field line is bypassed
Conductive body, now conductive body be equivalent to an insulator.Plate electrodes are arranged on above passage, only need to be logical to it
Electricity just plays blocking effect, fluid just can be made to continue flowing, serve the effect of switch after deenergization.
Electric piece is installed on microchannel 9 this utility model, and installation site is the outside wall surface of passage.When electric piece is energized it
Afterwards, the electric field 8 that electric piece produces can affect the medium 7 flowing in the electric field（Liquid medium）, thus hindering medium 7 to flow, play
The effect of switch.
The beneficial effects of the utility model are：Device simply it is only necessary to electric piece, is energized to it and can be achieved with the switch of micro-valve
Effect；Easy to operate, measurement process only need to be energized to electric piece.
Brief description
Fig. 1 is structural representation of the present utility model；
The each label of in figure：1- power supply；2- switchs；3- resistance I；4- resistance II；5- electricity piece I；6- electricity piece II；7- medium；8-
Electric field；9- microchannel.
Specific embodiment
Embodiment 1：As shown in figure 1, a kind of miniature valve of the induction EOF based on electrode drive, including power supply 1, switch
2nd, resistance I 3, resistance II 4, electric piece I 5, electric piece II 6, medium 7 and microchannel 9；
Described electricity piece I 5, electric piece II 6 are arranged on the outside wall surface of microchannel 9, and electric piece II 6 is connected with resistance II 4 one end and power supply 1
Connect, electric piece I 5 is connected between resistance II 4 other end and resistance I 3 one end, resistance I 3 other end passes through to switch 2 with power supply 1 even
Connect, the electric piece I 5 that closure switch 2 are then energized, electric piece II 6 produce electric field 8, and impact has Jie flowed in the microchannel 9 of electric field 8
Matter 7.
Above in conjunction with accompanying drawing, specific embodiment of the present utility model is explained in detail, but this utility model is not
It is limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, can also be without departing from this practicality
On the premise of new objective, various changes can be made.
Claims (1)
1. a kind of based on electrode drive induction EOF miniature valve it is characterised in that：Including power supply（1）, switch（2）, electricity
Resistance I（3）, resistance II（4）, electric piece I（5）, electric piece II（6）, medium（7）And microchannel（9）；
Described electricity piece I（5）, electric piece II（6）It is arranged on microchannel（9）Outside wall surface, electric piece II（6）With resistance II（4）One end and
Power supply（1）Connect, electric piece I（5）It is connected to resistance II（4）The other end and resistance I（3）Between one end, resistance I（3）The other end leads to
Cross switch（2）With power supply（1）Connect, closure switch（2）The electric piece I being then energized（5）, electric piece II（6）Produce electric field（8）, impact
There is electric field（8）Microchannel（9）The medium of middle flowing（7）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620826347.6U CN205938167U (en) | 2016-08-02 | 2016-08-02 | Miniature valve of induced electroosmotic flow based on electrode drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620826347.6U CN205938167U (en) | 2016-08-02 | 2016-08-02 | Miniature valve of induced electroosmotic flow based on electrode drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205938167U true CN205938167U (en) | 2017-02-08 |
Family
ID=57925028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620826347.6U Expired - Fee Related CN205938167U (en) | 2016-08-02 | 2016-08-02 | Miniature valve of induced electroosmotic flow based on electrode drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205938167U (en) |
-
2016
- 2016-08-02 CN CN201620826347.6U patent/CN205938167U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20170208 Termination date: 20180802 |