CN205627815U - Based on integrated blender that declines of piezoelectricity drive - Google Patents

Abstract

The utility model discloses a based on integrated blender that declines of piezoelectricity drive, the upper gasket bottom that the body was formed by the rigid coupling, the middle part reflux layer, lower part vibration layer is formed, the upper gasket bottom is equipped with the upper portion hybrid chamber, integrated have a plurality of fluids to enter the mouth, mix the solution export, the middle part reflux layer is equipped with clockwise return flow line, anticlockwise return flow line, the middle part hybrid chamber, the integration has backward flow piezoelectricity micropump and chip electrode, lower part vibration layer is equipped with imports and exports the miniflow passageway, the lower part hybrid chamber, the integration has business turn over flowing pressure electricity micropump, the oscillator basement, just the internal diameter is the same with one heart for each hybrid chamber. The blender passes through alternating circulating reflux and reciprocating type sustained vibration a little, increase fluid area of contact within a definite time, and convection current and diffusion effect between the reinforcing fluid are a mixing efficiency height, the controllable little blender of process.

Description

A kind of based on Piezoelectric Driving integrated form micro-mixer

Technical field

This utility model relates to Microfluidic Mixing technical field, especially relate to Piezoelectric Driving integrated decline mixed Clutch.

Background technology

Microfluid mixer is one of micro-fluidic chip (microfluidic chip) vitals, is mainly used in reality Existing lot of trace reagent mixes fast and effectively, has in fields such as chemosynthesis, biological respinse, life sciences It is widely applied very much prospect.The channel design of micro-mixer is generally in micron dimension, and the Reynolds number of fluid is very Little, fluid is in laminar condition, relies primarily on the mixing of molecule diffusion, and to reach to mix completely between fluid Close and then need considerably long incorporation time.This causes the micro-fluidic advantage rapidly and efficiently analyzed to weaken even disappearing, Therefore, under minute yardstick, the quickly mixing of fluid is carried out to micro-fluidic most important.

In order to improve the mixing efficiency of fluid, it is necessary to take effective manner to the micro-contact surface increasing between fluid Amass or strengthen convection current and diffusion effect.At present, micro-mixer is driven can be divided into two according to or without outside energy Big class: active micro-mixer and passive type micro-mixer.Passive mixer generally uses has labyrinth Microchannel or microchannel in special construction, increase micro-contact area as far as possible to improve mixing efficiency, its Shortcoming is that difficulty of processing is big, mixed effect and poor controllability.Active micro-mixer needs external energy to drive Move and mix, specifically include that micro-stirring, pressure disturbance, acoustic perturbation, magnetically-actuated, electrofluid drive Move, have an advantage in that good mixing effect and mixed process are controlled, but also can there is processing technique complexity, add Work cost intensive, the problems such as the most easy of integration.

Through existing literature search is found, China Patent No.: CN102553482A, proprietary term: novel backflow Decline blender, which discloses a kind of high backflow passive microfluid mixer.This micro-mixer utilizes Coanda effect causes backflow, backflow to extend the incorporation time of fluid also by arranging symmetrical feedback channel Promote to form eddy current, increase the contact area between fluid.But still have the disadvantage in that for low reynolds number Fluid, its reflux ratio and mixing intensity are poor, and structural parameters are difficult to determine, and mixed process is uncontrollable System.

Summary of the invention

For the deficiency overcoming above-mentioned prior art to exist, this utility model provides a kind of based on Piezoelectric Driving Integrated form micro-mixer, makes solution mixing velocity faster, and mixed effect is more preferable and mixed process is more controllable.

This utility model be the technical scheme is that offer is a kind of based on Piezoelectric Driving integrated form micro-mixer, Body is made up of affixed upper gasket bottom, middle part reflux layer, bottom vibration level, and upper gasket bottom sets Having top hybrid chamber, be integrated with multiple fluid intake, mixed solution outlet, middle part reflux layer is provided with clockwise Return flow line, return flow line counterclockwise, middle part hybrid chamber, be integrated with backflow piezoelectric micropump and chip electrode, Bottom vibration level is provided with import and export microchannel, bottom hybrid chamber, is integrated with turnover stream piezoelectric micropump, oscillator Substrate；Each hybrid chamber is concentric and internal diameter is identical.

The outer wall of bottom vibration level import microchannel is all tangent with hybrid chamber, and rotation direction keeps consistent, fluid Eddy flow is formed by self flowing；The outer wall of reflux layer return flow line clockwise, middle part is all tangent with hybrid chamber, Rotation direction is that fluid, by clockwise backflow, forms eddy flow clockwise in hybrid chamber clockwise；In Portion's reflux layer is counterclockwise, and return flow line outer wall is all tangent with hybrid chamber, and fluid is refluxed by counter clockwise direction, Hybrid chamber is formed eddy flow counterclockwise.

Two kinds of reflux type alternate cycles effects successively, significantly enhance the mixed effect of solution.

By continuous alternating signal driving pressure electric tachometer indicator substrate, different based on frequency so that it is be in single order or Multi-modes vibrates, and strengthens convection current and diffusion between fluid, improves mixing efficiency.

Integrated backflow piezoelectric micropump can be to have valve pump or valveless pump, and quantity is two or more；Stream Body entry number is two or more.

Operation principle of the present utility model is: the runner that the multiple rotation directions tangent with cavity are identical is easy to fluid and is led to The flowing crossing self produces cyclonic effect in chamber；Piezoelectric micropump is the inverse piezoelectric effect utilizing piezoelectric ceramics Make piezoelectric vibrator be deformed, deformation cause pump chamber change to realize the one-way flow of fluid；Oscillator base The end is to utilize piezoelectric vibrator to be in single order or multi-modes vibration, acts in microfluid, and it is right to strengthen between fluid Stream and diffusion.

Compared with prior art, the beneficial effects of the utility model are: by alternative expression circulating reflux with reciprocating Modal vibration two ways acts in microring array jointly, is that a kind of initiative is higher, that process is more controlled is micro- Blender.On the basis of possessing extremely strong mixed, it is possible not only to quickly mix the solution of high reynolds number, Also can the solution of the good low reynolds number of high efficient mixed, there is the vast scope of application.

Accompanying drawing explanation

Below in conjunction with the accompanying drawings and this utility model is further illustrated by embodiment.In accompanying drawing:

Fig. 1 is three dimensional structure installation diagram described in the utility model.

Fig. 2 is depression angle described in the utility model structural blast figure.

Fig. 3 is upward view angle structural blast figure described in the utility model.

Fig. 4 is upper substrate Rotating fields schematic diagram described in the utility model.

Fig. 5 is middle part described in the utility model reflux layer structural representation.

Fig. 6 is bottom described in the utility model vibration level structural representation.

Fig. 7 is that gateway described in the utility model flows to schematic diagram.

Fig. 8 is that reflux layer counter clockwise flow described in the utility model is to schematic diagram.

Fig. 9 is that reflux layer described in the utility model flows to schematic diagram clockwise.

Wherein: 1, mixed solution outlet；2, valve free pump A；3, fluid intake one；4, oscillator substrate； 5, there is valve Micropump A；6, chip electrode；7, valve free pump B；8, middle part reflux layer；9, bottom vibration Layer；10, upper gasket bottom；11, valve free pump C；12, there is valve Micropump B；13, fluid intake two； 14, valve free pump D；15, there is valve Micropump C.

Detailed description of the invention

Refer to Fig. 1, Fig. 2, Fig. 3, to mix two kinds of solution (solution A and solution B), be driven in and out stream Power source be have valve Micropump, the power source that drives backflow is this reality to be described as a example by 4 piezoelectricity valve free pumps With novel.This utility model is formed by three parts are affixed, and upper gasket bottom (10) is integrated with fluid intake one (3), fluid intake two (13), mixed solution outlet (1)；It is micro-that middle part reflux layer (8) is integrated with valveless Pump A (2), valve free pump B (7), valve free pump C (11), valve free pump D (14) and chip electricity Pole (6)；Bottom vibration level (9) is integrated with oscillator substrate (4), has valve Micropump A (5), has valve Micropump B (12), there is valve Micropump C (15).

As shown in Figure 4, upper gasket bottom (10) is provided with top hybrid chamber (1001), upper entrance passage one (1002), upper entrance passage two (1004), upper outlet passage (1003).As it is shown in figure 5, middle part Reflux layer (8) is provided with middle part hybrid chamber (803), Micropump cavity A (802) and runner A1 (801), Runner A2 (804), Micropump cavity B (806) and runner B1 (807), runner B2 (805), micro- Pump housing C (810) and runner C1 (809), runner C2 (811), Micropump cavity D (814) and Runner D1 (815), runner D2 (813), centre entrance passage one (816), centre entrance passage two (808), Centre exit passage (812).As shown in Figure 6, bottom vibration level (9) be provided with bottom hybrid chamber (901), Lower entrances runner one (904), entrance channel two (902), lower part outlet runner (903).Each hybrid chamber With one heart and internal diameter is identical.

During work, solution A has valve Micropump A (5) to drive by piezoelectricity, by fluid intake one (3), top Access road one (1004), centre entrance passage one (816), lower entrances runner one (904) flow into the end In portion's hybrid chamber (901), B solution has valve Micropump B (12) to drive, by fluid intake by piezoelectricity simultaneously Two (13), upper entrance passage two (1002), centre entrance passage two (808), lower entrances runner two (902) flow in bottom hybrid chamber (901), due to gateway, bottom runner outer wall and bottom hybrid chamber phase Cutting and rotation direction is consistent, therefore, fluid can be formed in bottom hybrid chamber (901) by the flowing of self Eddy flow, carries out preliminary microring array to solution.Hereafter through following reflux type one, reflux type two alternately After circulating reflux, the solution finally mixed has valve Micropump C (15) to drive, by lower part outlet stream by piezoelectricity Road (903), through centre exit passage (812), upper outlet passage (1003) from mixed solution export (1) flow out, flow to signal as shown in Figure 7.

Reflux type one: valve free pump A (2), valve free pump C (11) work, and mixed solution is through runner A1 (801), runner C1 (809) separately flow into cavity A (802), cavity C (810), the most respectively from Runner A2 (804), runner C2 (811) flow back to middle part hybrid chamber (803), form backflow, due to runner A1 (801), runner A2 (804), runner C1 (809), C2 runner (811) outer wall are all and hybrid chamber Tangent and rotation direction is counterclockwise, therefore, produces eddy flow counterclockwise in hybrid chamber, flows to signal such as Fig. 8 institute Show.

Reflux type two: piezoelectricity valve free pump B (7), valve free pump D (14) work, mixed solution is through stream Road B1 (807), runner D1 (815) separately flow into cavity B (806), cavity D (814), distinguish again Flow back to middle part hybrid chamber (803) from runner B2 (805), runner D2 (813), form backflow, due to stream Road B1 (807), B2 (805), D1 (815), D2 (813) outer wall is all tangent with hybrid chamber and rotation direction is Clockwise, therefore, hybrid chamber produces eddy flow clockwise, flow to signal as shown in Figure 9.

Two kinds of actively reflux type cycle alternation successively work, increase the contact area between fluid, make solution mix Close more efficient.

Oscillator substrate (4) is constantly in single order or multi-modes vibration in mixed process, enhances fluid Between convection current and diffusion, make solution mix more abundant.

Above-mentioned piezoelectricity valve free pump A (2), valve free pump B (7), valve free pump C (11) valve free pump D (14), piezoelectricity have valve Micropump A (5), have valve Micropump B (12), have valve Micropump C (15), oscillator base The end (4), is all connected with peripheral control unit by chip electrode (6).

Claims (4)

1. one kind based on Piezoelectric Driving integrated form micro-mixer, it is characterised in that: body is by affixed upper Portion's substrate layer, middle part reflux layer, bottom vibration level form, and upper gasket bottom is provided with top hybrid chamber, integrated Having multiple fluid intake, mixed solution to export, middle part reflux layer is provided with return flow line clockwise, returns counterclockwise Circulation road, middle part hybrid chamber, be integrated with backflow piezoelectric micropump and chip electrode, bottom vibration level be provided with into Outlet microfluidic channels, bottom hybrid chamber, be integrated with turnover stream piezoelectric micropump, oscillator substrate；Each hybrid chamber is same The heart and internal diameter are equal.

One the most according to claim 1 is based on Piezoelectric Driving integrated form micro-mixer, it is characterised in that: The outer wall of bottom vibration level import microchannel is all tangent with hybrid chamber, and rotation direction keeps consistent；Middle part backflow The outer wall of layer return flow line clockwise is all tangent with hybrid chamber, and rotation direction is clockwise；The middle part reflux layer inverse time Pin return flow line outer wall is all tangent with hybrid chamber, and rotation direction is counterclockwise.

One the most according to claim 1 is based on Piezoelectric Driving integrated form micro-mixer, it is characterised in that: Middle part reflux layer reflux type is the alternative expression circulating reflux suitable, counterclockwise that piezoelectric micropump drives, piezoelectric micropump Can be to have valve or valve free pump.

One the most according to claim 1 is based on Piezoelectric Driving integrated form micro-mixer, it is characterised in that: Bottom vibration level oscillator base drive signal is continuous alternating signal, and different based on frequency, mode of vibration is one Rank or multi-modes vibration.