A splicable pneumatic one-way microvalve made by 3D printing
A 3D printing, one-way technology, applied in the field of microfluidics, can solve the problems of switching microvalve or adjusting flow error, automatic control link response delay, complex microvalve structure, etc., to avoid backflow, simple one-way flow structure, The effect of simplifying the connection method
Active Publication Date: 2022-06-28
SOUTHEAST UNIV
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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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[0033] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.
[0034] like figure 1 , Figure 5 and Figure 8 As shown, the splicable pneumatic one-way micro-valve made by 3D printing in this embodiment includes an airway block 100, a deformation membrane 200 and a flow channel block 300. The deformation membrane 200 is sealedly connected to the top surface of the airway block 100 and the flow channel block. 300 between the bottom surface;
[0035] like Figure 2-Figure 4 As shown, the top surface of the airway block 100 is provided with a lower one-way cavity 104 for communicating with an external fluid source, and the bottom surface of the flow channel block 300 is provided with an upper one-way cavity 301 corresponding to the lower one-way cavity 104 and an upper one-way cavity 301 corresponding to the upper one-way cavity 104. A communicating outflow chamber 305 that can be connected on and off to the cha...
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The present invention provides a splicable pneumatic one-way microvalve manufactured by 3D printing, which includes an air channel block, a deformable film and a flow channel block, and the deformable film is sealingly connected to the top surface of the air channel block and the flow channel block between the bottom surfaces; the top surface of the air channel block is provided with a lower one-way cavity for communicating with an external fluid source, and the bottom surface of the flow channel block is provided with an upper one-way cavity corresponding to the lower one-way cavity, and an upper one-way cavity corresponding to the upper one-way cavity. A connected outflow cavity that can be connected to the cavity; the deformation membrane between the lower one-way cavity and the upper one-way cavity is provided with a flow hole, and the depth of the lower one-way cavity is less than the depth of the lower one-way cavity. The amount of deformation when the deformable membrane is bent downward to the bottom surface of the one-way cavity, the depth of the upper one-way cavity is greater than the deformation amount when the deformable film is bent upward to the top surface of the one-way cavity, so that the fluid can only flow from the lower one-way cavity Upward unidirectional cavity for unidirectional flow. The invention ensures one-way fluid flow, avoids backflow, has simple flow control structure and fast response speed.
Description
technical field [0001] The invention relates to the technical field of microfluidics, in particular to a splicable pneumatic one-way microvalve made by 3D printing. Background technique [0002] Microfluidic chip (Iab-on-a-chip) is an integrated chip that takes microfluidics as the operating object and replaces the laboratory to complete functions including micro sample introduction, transmission, dilution, mixing, reaction and detection. Fields such as biology and medicine have great potential for development. [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 impact. [0004] There are many types of microvalve, which can be divided into piezoelectric ceramic microvalve, pneumatic microvalve, electromagnetic microva...
Claims
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IPC IPC(8): F16K99/00
CPCF16K99/0055F16K99/0015F16K2099/0082
Inventor 张艳江源陈云飞陈凯田云
Owner SOUTHEAST UNIV