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A reflux passive micro-mixer based on jet flow principle

A mixer and jet technology, applied in the field of microfluid analysis, can solve the problems of high mixing efficiency and low fluid mixing efficiency, and achieve the effects of easy processing and integration, simple structure and good comprehensive performance

Inactive Publication Date: 2019-02-05
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiency that the existing ordinary T-type micro-mixer only has relatively high mixing efficiency near the center surface, and the fluid mixing efficiency near the wall of the micro-mixer is low, and proposes a backflow passive micro-mixer based on the principle of jet flow. Mixer, to return the fluid with low mixing efficiency near the wall of the micro-mixer to the mixing zone through the feedback channel for re-mixing, and mix through multiple cycles to promote the complete mixing of the two liquids

Method used

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  • A reflux passive micro-mixer based on jet flow principle
  • A reflux passive micro-mixer based on jet flow principle
  • A reflux passive micro-mixer based on jet flow principle

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Embodiment Construction

[0013] Such as figure 1 , figure 2 with image 3 As shown, the present invention is composed of an upper cover plate 28 and a mixing plate 24 bonded together with the upper cover plate 28 , and the mixing plate 24 is located directly below the upper cover plate 28 . On the upper cover plate 28, there are first inlet hole 26, second inlet hole 25 and outlet hole 27 vertically arranged up and down. The first inlet hole 26 and the second inlet hole 25 have the same structure and are located on the inlet side. The outlet hole 27 on the exit side. On the inlet side of the mixing plate 24 are opened a first inlet channel 1 and a second inlet channel 2 arranged horizontally front and back, and on the outlet side of the mixing plate 24 there are outlet channels 22 arranged horizontally left and right. The upper and lower depths of the first inlet channel 1 , the second inlet channel 2 and the outlet channel 22 are H2, and 100 μm≤H2≤200 μm. The first inlet hole 26, the second inle...

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Abstract

The invention discloses a backflow passive micro-mixer based on the jet flow principle in a micro-electromechanical system. There are n groups of jet flow and backflow structures arranged from left to right along the central axis of the mixing channel, n≥4, each group of jet flow and backflow The structures are all composed of reducers, jet nozzles, feedback channels and expanders in series from left to right; each set of jet and return structures has two feedback channels symmetrically arranged front and back relative to the central axis, and each feedback channel is composed of The ring structure formed by connecting the inlet side channel of the feedback channel, the transition channel of the feedback channel, the outlet side channel of the feedback channel and the mixing zone, the entrances of the two feedback channel inlet side channels and the outlets of the two feedback channel outlet side channels are connected to form a joint Mixing zone: A low-pressure zone is generated near the jet nozzle, and the fluid with low mixing efficiency returns to the vicinity of the jet nozzle through the feedback channel, and is entrained and mixed by the jet again, thereby promoting the complete mixing of the two liquids.

Description

technical field [0001] The invention relates to the field of microfluid analysis in microelectromechanical systems, in particular to a micromixer. Background technique [0002] Through the integration of microchannels, micropumps, microvalves, and micromixers, microfluidic systems realize the control, operation, and detection of microfluids at the microscale, which has become an important branch of microelectromechanical systems. In a microfluidic system, the analysis efficiency of the entire system depends on whether two or more fluids can be mixed quickly and fully. Therefore, the research on microfluidic mixing technology has become one of the hot spots in the research of microfluidic systems. As an important part of microfluidic systems, micromixers are used to achieve full mixing of different reactants under microscale conditions, and are more and more widely used in microanalytical chemistry, biochips, and microchemical systems. [0003] Micromixers can be divided int...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01F13/00B01F5/04
CPCB01F25/31233B01F25/31242B01F33/301B01F2101/23
Inventor 何秀华王岩高凌峰
Owner JIANGSU UNIV
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