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Double-symmetric parallel film micro-constant flow valve and flow regulation and control method

A double-symmetrical, constant-flow valve technology, applied in the direction of diaphragm valves, diaphragms, valve details, etc., can solve the problem that double-membrane valves are difficult to meet general needs, and achieve low threshold pressure, wide flow control range, and precise control effects

Pending Publication Date: 2021-01-19
CHANGZHOU INST OF LIGHT IND TECH
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  • Abstract
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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

Method used

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  • Double-symmetric parallel film micro-constant flow valve and flow regulation and control method
  • Double-symmetric parallel film micro-constant flow valve and flow regulation and control method
  • Double-symmetric parallel film micro-constant flow valve and flow regulation and control method

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Embodiment

[0021] Double symmetrical parallel film micro-constant flow valve uses four layers of two parallel elastic films to produce elastic deformation under the action of micro-fluids to adjust the flow resistance of micro-fluids and compensate for changes in fluid pressure to achieve the purpose of precisely adjusting the flow of micro-fluids. Such as Figure 1-Figure 4 As shown, it includes sample inlet 1, sample outlet 2, upper control channel 3, lower control channel 4, left control channel 5, right control channel 6, fluid main channel 7, narrow channel 8, upper elastic film 9 , the lower elastic membrane 10, the left elastic membrane 11 and the right elastic membrane 12; the inlets of the upper control flow channel 3, the lower control flow channel 4, the left control flow channel 5, the right control flow channel 6 and the fluid main flow channel 7 are all connected with the sample inlet 1 is connected; the ends of the upper control channel 3 and the lower control channel 4 ar...

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Abstract

The invention discloses a double-symmetric parallel film micro-constant flow valve and a flow regulation and control method. The double-symmetric parallel film micro-constant flow valve comprises twocontrol flow channels which are separately arranged up and down, two control flow channels which are arranged left and right, a fluid main flow channel, a narrow flow channel and four elastic films which are parallel in pairs. The inlets of the four control flow channels communicate with the fluid main flow channel, and the outlets of the control flow channels are sealed by the elastic films and are separated from the narrow flow channel. According to the flow regulation and control principle of the double-symmetric parallel film micro-constant flow valve, the four elastic films are used for generating elastic deformation under the action of the pressure of microfluid in the control flow channels, the microfluid in the narrow flow channel is extruded, the flow resistance of the valve is changed so as to compensate the change of the pressure intensity of the fluid in real time, and finally constant regulation and control of the flow of the microfluid are realized. According to the valve, the driving pressure intensity required for realizing constant flow regulation and control is small (less than 20kPa), the output flow range is wide, and the valve has wide application value in thefields of medicine injection, integrated microchip laboratories, portable instant detection instruments and the like.

Description

technical field [0001] The invention relates to the field of microfluidic control and portable real-time detection instruments, in particular to a double-symmetrical parallel thin-film micro-constant flow valve and a flow regulation method that can be used for automatic and precise regulation of microfluid flow. Background technique [0002] With the development of micro-nano manufacturing technology, microfluidic valves have played an important role as micro-scale control elements in the fields of structure and chemical biology, gene sequencing, and single-cell analysis. Among them, the microfluidic flow control valve has a wide range of application requirements in the fields of precise drug delivery systems, nucleic acid detection, and cell sorting because it can precisely regulate the flow rate 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 co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K7/07F16K31/126F16K99/00
CPCF16K7/07F16K31/1268F16K99/0015F16K99/0055
Inventor 李星衡谢宝智冀玉梅
Owner CHANGZHOU INST OF LIGHT IND TECH
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