Piezoelectric microfluidic mixer

Abstract

The invention discloses a piezoelectric microfluidic mixer, which is characterized in that: a deformation mixing pipe is communicated between two pump inlets and a pump cavity, and between a pump outlet and the pump cavity respectively, the deformation part of the deformation mixing pipe is composed of seven pipelines in a communicating way, a third pipeline is parallel to a first pipeline and the third pipeline, a semicircular second pipeline and a conical seventh pipeline are connected in parallel between the right end of the first pipeline and the left end of the third pipeline, the large end of the conical seventh pipeline is connected with the first pipeline and the second pipeline while the small end of the conical seventh pipeline is connected to the side part of the third pipeline; a semicircular sixth pipeline and a conical fourth pipeline are connected in parallel between the left end of a fifth pipeline and the right end of a third pipeline, and the large end of the conicalfourth pipeline is connected with the right end of the third pipeline and the sixth pipeline respectively while the small end of the conical fourth pipeline is connected to the sidewall of the fifth pipeline; two fluids to be mixed flow, through the inlets, into the deformation mixing pipe at the left side for preliminary mixing, then enter the pump cavity for sufficient mixing and finally flow out of the outlet through the mixing pipe at the right side, so satisfactory effect can be achieved by sufficiently mixing the fluids three times, and simultaneously, pumping and mixing are realized.

Description

technical field [0001] The invention relates to the technical field of micro-fluid pumps in micro-fluid machines, in particular to a piezoelectric micro-fluid mixer capable of mixing a small amount of liquid and controlling the direction of fluid. Background technique [0002] The microfluidic mixer is composed of microfluidic quantifiers, micropumps, microvalves, and microchannels. It is used to fully mix various reagents before biochemical reactions and is an important part of microfluidic chips. Compared with the macro-sized mixing device, the size of the microfluidic mixer is reduced, which greatly reduces the energy consumption and the amount of samples and reagents in the flow system, and has a fast response speed and high accuracy. Therefore, it is widely used in chemical analysis, biological and chemical sensing. , Molecular separation, nucleic acid sequencing and analysis, environmental monitoring and other fields have broad application prospects. [0003] Accordin...

AI Technical Summary

Problems solved by technology

At present, the size of the microchannel in the microfluidic mixer is in the range of tens to hundreds of microns. The Reynolds number of the liquid in the microchannel is so small that there is no eddy current, and the mixing between liquids is mainly based on molecular diffusion, making Compared with the macro situation, the mixing time is greatly prolonged and the mixing effect becomes worse. Therefore, special methods must be adopted to increase the micro-contact area between liquids or enhance convection to improve mixing efficiency.

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