Tapering bend series connection type micromixer

Abstract

The invention discloses a tapering bend series connection type micromixer in a microfluid system. In the direction of a center shaft of a main channel, n cross mixed channels are equidistantly arranged from left to right, n is not smaller than 2, each cross mixed channel is formed by two tapering bends and two direct current pipes, inlets and outlets of two direct current pipes in each cross mixed channel are in end-to-end connection and communication and are disposed on the front side and the rear side of the center shaft of the main channel respectively, a first tapering bend is disposed on the front side of the direct current pipe on the front side, and a second tapering bend is disposed on the rear side of the direct current pipe on the rear side. Inlets of the tapering bend and the direct current pipe on the same side are connected and communicated, and outlets of the tapering bend and the direct current pipe on the same side are also connected and communicated, and the pipe widths of the tapering bends from the inlets to the outlets are gradually reduced. By utilizing the cross structure of the tapering bends and the direct current pipes, fluid generates secondary flow in the tapering bends, severe chaotic convection is generated at the joint of the two bends, and finally complete mixing is performed.

Description

technical field [0001] The invention relates to the field of microfluid mixing in microfluidic systems, in particular to a micromixer. Background technique [0002] The microfluidic system is a system that controls, manipulates and detects complex fluids at the microscopic scale. It can not only reduce the amount of experimental reagents used, but also greatly shorten the experimental time and improve the experimental effect. Microfluidic systems mainly include micromixers, microreactors, and microfluidic channels. Micromixers are an important part of microfluidic systems because they can fully mix fluids at the microscale. [0003] At present, micro-mixers can be divided into active mixers and passive mixers according to the distinction between power sources and non-power sources. Active mixers are distinguished according to the principle of action, and can be divided into electric, magnetic, jet, mechanical, etc., but active mixers are difficult to process and cost high. ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of the existing micro-mixer such as long mixing channel, long mixing time, and large flow loss, and propose a series micro-mixer with tapered pipes, which uses a cross-type straight pipe and tapered pipe. The structure separates and reorganizes the flow of the mixed liquid to increase the convection strength of the fluid, thereby shortening the mixing distance of the micro-mixer, reducing flow loss, and greatly improving the mixing efficiency of the micro-mixer

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