Splicing pneumatic one-way micro valve manufactured through 3D printing

Abstract

The invention provides a splicing pneumatic one-way micro valve manufactured through 3D printing. The splicing pneumatic one-way micro valve comprises an air channel block, a deformation film and a runner block, wherein the deformation film is connected between the top face of the air channel block and the bottom face of the runner block in a sealed manner; a lower one-way cavity used for communicating with an external fluid source is formed in the top face of the air channel block; an upper one-way cavity corresponding to the lower one-way cavity and a communicating outflow cavity in on-off connection with the upper one-way cavity are formed in the bottom face of the runner block; a circulation hole is formed in the part, between the lower one-way cavity and the upper one-way cavity, of the deformation film; the depth of the lower one-way cavity is smaller than the deformation amount of the deformation film when the deformation film is bent towards the bottom face of the lower one-way cavity; and the depth of the upper one-way cavity is larger than the deformation amount of the deformation film when the deformation film is bent towards the top face of the upper one-way cavity, and therefore fluid can only flow towards the upper one-way cavity from the lower one-way cavity in one way. According to the splicing pneumatic one-way micro valve, one-way flowing of the fluid is guaranteed, backflow is avoided, the flow control structure is simple, and the response speed is high.

Description

technical field [0001] The invention relates to the field of microfluidic technology, in particular to a splicable pneumatic one-way microvalve manufactured by 3D printing. Background technique [0002] The microfluidic chip (Iab-on-a-chip) is an integrated chip that uses microfluidics as the operating object and replaces the laboratory to complete functions including micro sample introduction, transmission, dilution, mixing, reaction and detection. There is huge potential for development in areas such as biology and medicine. [0003] The microvalve is one of the most important modules on the microfluidic chip. It is used to control the opening of the flow channel, change the flow direction, adjust the flow rate and flow stability, etc. The performance of the microvalve affects the function of the microfluidic chip. have a decisive influence. [0004] There are many types of micro valves, which can be divided into piezoelectric ceramic micro valves, pneumatic micro valves...

AI Technical Summary

Problems solved by technology

[0004] There are many types of micro valves, which can be divided into piezoelectric ceramic micro valves, pneumatic micro valves, electromagnetic micro valves, shape memory alloy micro valves, phase change micro valves, etc. according to the driving form. Traditional micro valves have complex structures, poor sealing performance, and backflow phenomenon, and there are defects such as response delay in the automatic control link, resulting in errors when switching microvalves or adjusting flow

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