Micro-fluidic negative pressure driving normally open micro-valve

Abstract

The invention discloses a micro-fluidic negative pressure driving normally open micro-valve which comprises a valve body and a valve element, wherein a valve cavity is formed in the valve body; a normally open input end and a normally open output end are arranged on the valve cavity; the valve element is positioned in the valve cavity and is hollow; the valve element has deformation along with internal and external pressure change of the valve element; the valve element is provided with a negative pressure input end; and negative pressure enters the valve element to deform the valve element toblock the input end or the output end so as to close the valve. According to the micro-fluidic negative pressure driving normally open micro-valve, a negative pressure signal controls on-off of a positive pressure signal to bring large deformation and higher output variable quantity; the micro-fluidic negative pressure driving normally open micro-valve is mainly used for a micro-fluidic chip, ishigher in safe reliability, can easily realize the grounding and signal gain functions similar to those of a digital circuit, realizes multiple functions of NOT gate, AND gate and or gate, and also can realize storage, oscillation and high-level application of a pneumatic signal through the design method of an equivalent circuit.

Description

technical field [0001] The invention relates to a digital microfluidic pressure logic control chip, and mainly relates to a microfluidic negative pressure driven normally open microvalve. Background technique [0002] Digital microfluidics is a new type of pneumatic logic control technology that has emerged in recent years. With the development of modern robot systems towards bionics and flexibility, especially the emergence of pneumatic flexible actuator structures, it has wider applications. By constructing a microvalve array system with digital logic, the technology regards the microvalve as a transistor in a digital circuit, and regards the flow channel as a wire, so that the signal of the output channel can be controlled and adjusted according to the logic of the input signal, where the input signal can be It is the air pressure, and it can also be the corresponding hydraulic signal. However, its output signal has always been a negative vacuum pressure. For the current...

AI Technical Summary

Problems solved by technology

However, its output signal has always been a negative vacuum pressure. For the current pneumatic flexible actuators, the negative pressure structure cannot bring large deformation and high output variation, so special designed components are required. The negative pressure signal output by the digital microfluidic logic chip is converted into a positive pressure pneumatic or hydraulic pressure that can be directly used for flexible actuator drive

Images