A microfluidic gas damper and its adjustment method
A gas damping and microfluidic technology, which is applied in the fields of biomedicine and microfluidic chips, can solve the problems of inability to adjust the working pressure of the system and cannot be applied, and achieve the effects of stable gas pressure, low cost and small volume.
Active Publication Date: 2018-04-03
SOUTHEAST UNIV
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Problems solved by technology
Although passive microvalve and micropump can achieve stable flow control, they cannot adjust the working pressure of the system, so they are not suitable for applications that require stable working pressure
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[0027] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.
[0028] A microfluidic gas damper, which uses the elastic deformation of the horizontal film and the vertical film to absorb the impact of the air pressure and intercept the gas flow in the straight flow channel to reduce the fluctuation of the gas pressure in the microfluidic system and achieve stable system operation pressure purposes, such as Figure 1-3 As shown, it includes an upper substrate 1 , a middle substrate 3 and a lower substrate 4 arranged sequentially ...
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The invention discloses a microfluidic gas damper and an adjusting method. The microfluidic gas damper comprises an upper substrate, a horizontal thin film, a middle substrate and a lower substrate, wherein the upper substrate comprises a gas inlet flow channel, an upper control flow channel and a gas outlet flow channel; the middle substrate comprises a straight-through flow channel and a vertical thin film; and the lower substrate comprises a lower control flow channel. The microfluidic gas damper utilizes elastic deformation generated by compression of gas on the horizontal thin film and the vertical thin film to absorb gas pressure impact and intercept gas flow in the straight-through flow channel, thereby reducing fluctuation of gas pressure in a microfluidic system and achieving the purpose of stabilizing system operating pressure. The microfluidic gas damper provided by the invention does not need external equipment control, can self-stabilize fluctuant gas pressure, has the advantages of small volume, low cost, easy integration, etc., and has extensive application values in places needing supplying constant operating pressure and fluid flow in the field of microfluidics.
Description
technical field [0001] The invention relates to a microfluidic gas damper, which belongs to the fields of biomedicine, microfluidic chip technology and the like. Background technique [0002] As an effective means of manipulating microfluidics and biological particles, microfluidic technology has been widely used in the fields of biochemical analysis, biomedicine and diagnosis. In most microfluidic applications, stable working pressure is very important, which directly affects the functional performance of microfluidic chips in practical applications. For example, when using microfluidic inertial sorting technology to achieve precise cell sorting and analysis, it is necessary to provide very precise sample flow to enable efficient focusing and separation of biological cells under the action of Dean flow, while precise sample flow and stable The driving pressure is directly related. Therefore, how to achieve stable working pressure and precise sample flow control in the mic...
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IPC IPC(8): B01L3/00
CPCB01L3/5027B01L2200/10B01L2300/14
Inventor 倪中华张鑫杰项楠
Owner SOUTHEAST UNIV