Pneumatic driving device and the associated method for micro fluids

Abstract

A pneumatic driving device and the associated method for micro fluids, wherein the pneumatic driving device for micro fluids is constructed by connecting a fluid pipe with a structure that is formed by two gas stream inlets, a gas stream fender, a gas stream flow path and a gas stream outlet. The suction, exclusion and stagnation for the micro fluids inside the fluid pipes can be accomplished by adjusting the flow rates of the gas streams into the device at the two gas stream inlets. In the invention, several pneumatic driving devices are connected to form a single recursive pneumatic driving device by the concept of recursion, and the micro fluids inside several fluid pipes can be controlled to mix or to separate through the recursive pneumatic driving device by adjusting the flow rates of the gas streams into the device at different gas stream inlets.

1 . A pneumatic driving method for micro fluids, comprising the following steps: 
 providing a group of gas streams, each having a controllable flow rate and injection direction;    providing a matched gas stream flow path structure having a “solitary inland” gas stream fender for receiving said group of gas streams;    providing a fluid pipe to connect said gas stream flow path structure; and    adjusting the injection flow rates of said pair of gas streams into said gas stream flow path structure to drive one of the micro fluids inside said fluid pipe for sucking, excluding and stagnating.    
     
     
         2 . The pneumatic driving method of  claim 1 , wherein said pair of gas streams are composed of two gas streams having specific flow directions and flow rates.  
     
     
         3 . A recursive pneumatic driving method for micro fluids, comprising the following steps: 
 providing a group of gas streams, each having a controllable flow rate and injection direction;    providing a matched gas stream flow path structure containing a “solitary inland” gas stream fender for receiving said group of gas streams;    providing a fluid pipe connected to said gas stream flow path structure, wherein said fluid pipe having a first, a second, and a third pipes connected by an intersection; and    adjusting the flow rates of said pair of gas streams entering said gas stream flow path structure to drive the micro fluid inside said fluid pipes for sucking, excluding and stagnating, and to drive the micro fluid for mixing, separating or turning flow directions inside said first, second and third pipes.    
     
     
         4 . The recursive pneumatic driving method of  claim 3 , wherein said pair of gas stream are selected from the group consisting of one portion, two portions and three portions of gas streams.  
     
     
         5 . The recursive pneumatic driving method of  claim 3 , wherein the separated path of said micro fluid is selected from the group consisting of: the micro fluid flowing separately from said first pipe into said second and third pipes, the micro fluid flowing separately from said second pipe into said first and third pipes, and the micro fluid flowing separately from said third pipe into said first and second pipes.  
     
     
         6 . The recursive pneumatic driving method of  claim 3 , wherein the flow loop of said micro fluid is selected from the group consisting of the following loops: from said first pipe, to said second pipe, said third pipe and then said first pipe in sequence; from said first pipe, to said third pipe, said second pipe and then said first pipe in sequence; from said third pipe, to said first pipe, said second pipe and then said third pipe in sequence; from said third pipe, to said second pipe, said first pipe and then said third pipe in sequence; from said second pipe, to said first pipe, said third pipe and the second pipe in sequence; from said second pipe, to said third pipe, said first pipe and then said second pipe in sequence.