Valveless piezoelectric micromixer for synthesizing jet

Abstract

The invention discloses a valveless piezoelectric micromixer for synthesizing jet, comprising a pump cover and a pump body which are bonded together, wherein two synthesis jet chambers are communicated with a relative inlet mixing flow path and a outlet mixing flow path, a first piezoelectric vibrator is fixed right above the pump cover, each of a second piezoelectric vibrator and a third piezoelectric vibrator is fixed right below the two synthesis jet chambers respectively, the inlet mixing flow channel and the outlet mixing flow channel are Y-type mixing flow channels each of which is composed of two shunting flow channels and a shunting flow channel, a jet synthesis exciter is arranged on the bottom of the mixing flow channel of the micromixer, fluid flow in the mixing flow channel is interfered by periodically ejecting and absorbing fluid by synthesis jet, and alternating voltage signal applied on the piezoelectric oscillator is regulated to implement large-range controllable mixing of mixed effect and mixed time.

Description

technical field [0001] The invention relates to a micro-fluid mixer in a micro-fluid machine, in particular to a valveless piezoelectric micro-mixer capable of mixing micro fluids and controlling the flow direction. Background technique [0002] The unique geometric characteristics, flow characteristics and transfer characteristics of the microfluidic system determine its advantages: small reaction volume, high conversion efficiency, low reactant consumption, high safety performance, etc. The application of technology and chemical reaction kinetics is getting more and more in-depth. Microfluidic systems include microreactors, micromixers, microvalves, micropumps, microheat exchangers, microsensors, etc., where micromixers can be used as microsensors for biochemical analysis instruments and for biochips and microvolumes. The mixing of different specimens and different reagents in the chemical analysis and detection system is used for rapid mixing and microinjection of drug...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a kind of synthetic jet valveless piezoelectric micro-mixer in order to overcome the deficiencies existing in the existing active micro-mixer, it is mainly aimed at the existing problems of the existing micro-mixer such as low mixing efficiency, Due to poor mixing controllability and mixing effect, the synthetic jet that can improve the mixing effect and rate of the fluid at the micro scale, effectively shorten the mixing length, and achieve pumping of the mixed fluid while mixing cannot be a piezoelectric micro-mixer, and has a structural Simple, convenient processing, low cost, small size, easy integration and miniaturization, etc.

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