Micro-flow control system, normally-closed micro-valve and control method

Abstract

The invention discloses a micro-flow control system, a normally-closed micro-valve and a control method. The normally-closed micro-valve comprises a micro-flow pipeline which is formed inside a base body; a valve element is arranged inside the micro-flow pipeline and is used for dividing the micro-flow pipeline into a first pipeline and a second pipeline; when the valve element is molten or gasified, the first pipeline communicates with the second pipeline; the valve element and the wall of the micro-flow pipeline are made from the same material; and a transparent material is arranged betweenthe outer wall surface of the base body and the valve element. The micro-valve disclosed by the invention is simple in structure, can solve the problem of integration of the micro-valve and the micro-flow control system and greatly reduces the machining difficulty because the valve element and the wall of the micro-flow pipeline are made from the same material, so the production cost is lowered.

Description

technical field [0001] The invention relates to a microfluidic control system, a normally closed microvalve and a control method, belonging to the field of micron-level valve control. Background technique [0002] The microvalve microfluidic system in the microfluidic system refers to the use of microfabrication technology to integrate various operational analysis functions involved in the field of biology or chemistry, such as sample pretreatment, mixing, reaction, separation and detection, etc. into a microchip. on the analysis system. Microfluidic chips have the advantages of miniaturization, integration, high efficiency, rapidity, minimal reagent consumption and low cost, and can be widely used in many fields such as biomedicine, disease diagnosis and treatment, environmental detection and protection, military and space exploration, etc. , is the frontier and hot spot of current technological development. As the key executive component of the microfluidic system, the m...

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Problems solved by technology

However, this patent uses ice as the spool, so it cannot be used for storage of reagents, and there is no spool under normal conditions; further, ice is easy to react with reagents, and ice is too large as a spool (it cannot be used as a valve core). to the micron level), precise control cannot be achieved. In addition, if the patent is used on a microfluidic chip, then the chip needs to be implanted with circuits, which will further increase the difficulty of chip manufacturing and reduce its reliability.

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