Minisize diffusion pump and preparation method thereof

A diffusion pump and miniature technology, which is applied in the direction of diffusion pumps, pumps, mechanical equipment, etc., can solve the problems of non-mechanical micropump application limitations, difficult preparation process, complex structure, etc., and achieve the difficulty of simplifying processing and driving methods , Reduce solid-liquid interface stress and dead zone, good biocompatibility

Inactive Publication Date: 2006-10-11
PEKING UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The present invention overcomes the disadvantages of the valved mechanical micropump, such as complex structure, difficult preparation process, and application limitations of non-mechanical micropumps, and provides a valveless microdiffusion pump, thereby improving the reliability and working stability of the micropump. And easy to integrate with most microfluidic systems, suitable for micro-transport of various fluids

Method used

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  • Minisize diffusion pump and preparation method thereof
  • Minisize diffusion pump and preparation method thereof
  • Minisize diffusion pump and preparation method thereof

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Embodiment Construction

[0044] The micro diffusion pump provided by the present invention adopts a wedge-shaped diffusion tube as its microvalve, that is, adopts a wedge-shaped diffusion tube structure with different positive and negative flow pressure losses. According to the different flow properties of the positive and negative flow pressures of the fluid in the diffusion tube, it can achieve unidirectional continuous The role of transport fluid. figure 1 Schematic diagram of the micro diffusion pump structure. It mainly includes: pump inlet 1, inlet diffuser 2, pump chamber 3, outlet diffuser 5, pump outlet 6, drive diaphragm vibrating device 4 and electrode 7 in the pump chamber, and diffuser 2 with different forward and reverse flow rates , 5 are respectively arranged between the pump chamber 3 and the pump inlet 1 and outlet 6, the wide mouth of the wedge-shaped diffuser 2 on the side of the pump inlet 1 is connected to the pump chamber 3, and the wedge-shaped diffuser 5 on the side of the pump ou...

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Abstract

The invention discloses a micro disperse pump which comprises a pump chamber, a one-way valve, a pump inlet, a pump outlet and a driving device inside the pump chamber; wherein, the one-way valve is between the pump chamber and the pump inlet, and between the pump chamber and the pump outlet; the one-way valve is a wedge disperse tube with different positive and passive fluxes; the fluid of pump chamber can be expanded and contracted to generate pressure difference, and according to the different pressures of positive and passive fluxes in the wedge disperse tube, to generate one-way continuous fluid transmission. The inventive micro disperse pump can drive fluid via adsorbing fluid or directly drive fluid. The production is based on silicon micro-mechanical processing technique and micro-mould technique, with simple process, lower cost, high reliability and the application for integrating other micro-fluid systems. It has wider application in the micro-fluid control analysis chip.

Description

Technical field [0001] The invention belongs to the technical field of microfluid control, transmission, and microactuators, and relates to a non-movable valve plate type micro diffusion pump and a preparation method thereof. Background technique [0002] The main feature of the microfluidic analysis chip system is that fluid flows in various configurations of microchannels and reaction cells. By controlling the fluid flow, various functions on the chip system are completed. The core of the operation in the microfluidic chip system is the drive of microfluidics, which is the foundation of microfluidic technology. The micropump is a very important microdrive and the core element of the microfluidic control system. At present, micro pumps prepared by micro-machining (MEMS) technology are mainly divided into mechanical fluid control micro pumps and non-mechanical fluid control micro pumps. Both the inlet and outlet of the mechanical micro pump need to match two one-way micro valves ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04F9/00
Inventor 于晓梅李修函张大成张海涛李婷王阳元
Owner PEKING UNIV
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