Hybrid passive micromixer for vortex system

Abstract

The invention discloses a hybrid passive micromixer for a vortex system, and belongs to the field of microfluid mixing, so that efficient mixing among high-flux fluids can be maintained on the basis of maintaining relatively low microchannel pressure drop. The hybrid passive micromixer comprises an upper substrate and a lower substrate which are tightly sealed with each other, wherein an inlet ofan entrance passageway and an outlet of an exit passageway are formed in the upper substrate, the lower substrate is internally provided with the entrance passageway, the exit passageway, a main passageway and uniformly arranged circular arc cavity mixing units, a circular arc cavity is formed by connected main passageways, and adjacent units in the uniformly arranged circular arc cavity mixing units are distributed symmetrically; through the design of the circular arc cavity mixing units, an original laminar condition can be destroyed effectively, a secondary flow is generated, the generationof chaos flowing liquid inside micromixing units is induced, effective extending shearing and stretching folding is generated for the generation of the liquid inside the micromixing units, and efficient mixing among the fluids is realized; and a circular arc wall structure can effectively reduce the fluid pressure loss of microchannels, so that the working efficiency of the micromixer is improved.

Description

technical field [0001] The invention belongs to the technical field of microfluid mixing, in particular to a vortex mixing type passive micro mixer. Background technique [0002] The microfluidic chip laboratory based on microfluidic technology is also called microfluidic chip. It uses precision processing technology to etch dozens to hundreds of chips on the surface of materials such as silicon wafers, metals or organic polymers in a few square centimeters. The micron-scale channel structure integrates the basic functions of sample acquisition, reagent separation, and target detection included in the traditional biochemical analysis process. With the help of fluid flowing in the microchannel, the sample addition, separation, and enrichment of the sample to be tested are completed. Collection, detection and other experimental operations to achieve rapid separation and analysis of various components in the sample. Compared with conventional experimental analysis and detectio...

AI Technical Summary

Problems solved by technology

Although the mixing efficiency of the active micro-mixer is relatively high, it requires an external disturbance source in addition to the fluid-driven device, and the micro-channel structure of the active micro-mixer is complex, not easy to process, and is not conducive to the integration of microfluidic chips; The passive micro-mixer does not require other external equipment except the fluid drive device, the channel structure is relatively simple, and it is easy to manufacture and microfluidic chip integration, so it is widely used in microfluidic chips.

The complex microchannel structure in the existing passive micromixer technology has problems such as complicated manufacturing process, large microchannel pressure drop, and low mixing efficiency.

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