Annular film microfluidic passive flow regulating valve and flow regulating method
A flow regulating valve and microfluidic control technology, which is applied in the direction of valve devices, engine components, mechanical equipment, etc., can solve the problem that the double membrane valve is difficult to meet the general needs, and achieve the effect of precise regulation and meeting the integration requirements
Active Publication Date: 2020-03-17
HOHAI UNIV CHANGZHOU
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Problems solved by technology
However, since the source pressure of most of the micro-power driving devices is within 20kPa, it is difficult for the double-membrane valve to meet the general needs of integrating with the micro-power driving device
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[0024] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.
[0025] An annular film microfluidic passive flow regulating valve utilizes the axial deformation of the annular elastic film under the action of the microfluid to adjust the flow resistance of the microfluid and compensate for the change of the fluid pressure, so as to achieve the purpose of accurately regulating the flow of the microfluid. like Figure 1-Figure 3 As shown, it includes a valve body 1, a fluid inlet 2, a control flow channel 3, a bypass hole 4, a membrane 5, a fluid main channel 6, and a fluid outlet 7;
[0026] The left end of the valve body 1 is provided with a fluid inlet 2, the right end is provided with a fluid outlet 7, the left end of the fluid main channe...
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Abstract
The invention discloses an annular thin-film microfluidic passive flow regulating valve and a flow regulating and controlling method. The annular thin-film microfluidic passive flow regulating valve comprises a valve body, a fluid inlet, a control flowing channel, a bypass hole, a thin film, a fluid main flowing channel and a fluid outlet, wherein the left end of the control flowing channel communicates with the fluid inlet through the bypass hole, the right end of the control flowing channel is separated from the fluid main flowing channel by the thin film, the thin film is an annular elasticthin film, axial deformation can be generated under the action of fluid pressure, the left end of the fluid main flowing channel communicates with the fluid inlet, and the right end of the fluid mainflowing channel communicates with the fluid outlet. The flow regulation and control principle of the annular thin-film microfluidic passive flow regulating valve is that the thin film generates the axial elastic deformation under the action of the microfluid pressure in the control flowing channel, then a microfluid in the fluid main flowing channel is extruded, the flow resistance of the valve is changed, and moreover, the change of the fluid pressure is compensated in real time so as to realize constant regulation and control of the flow of the microfluid.
Description
technical field [0001] The invention relates to the field of microfluidic control and convenient instant detection instruments, in particular to an annular thin-film microfluidic passive flow regulating valve and a flow regulating method which can be used for automatic and precise regulation of microfluidic flow. Background technique [0002] With the development of micro-nano manufacturing technology, microfluidic valves have played an important role in the fields of structural and chemical biology, gene sequencing, and single-cell analysis as micro-scale control elements. Among them, the microfluidic flow control valve has a wide range of application requirements in the fields of precise drug delivery system, nucleic acid detection, cell sorting, etc. because it can precisely control the flow and meet the requirements of precise microfluidic control. [0003] Existing microfluidic flow control valves are mainly divided into active flow control valves and passive flow contr...
Claims
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IPC IPC(8): F16K99/00
CPCF16K99/0015F16K99/0026F16K99/0057
Inventor 张鑫杰
Owner HOHAI UNIV CHANGZHOU