Minisize diffusion pump and preparation method thereof

A diffusion pump and miniature technology, which is applied in the fields of micro-actuators, transmission, and microfluidic control, can solve the problems of difficult preparation process, complex structure, and application limitations of non-mechanical micro-pumps, and achieve simplified processing and realization of difficulty and drive method, good biocompatibility, and the effect of reducing solid-liquid interface stress and dead zone

Inactive Publication Date: 2008-11-19
PEKING UNIV
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  • Abstract
  • Description
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  • Application Information

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

[0042] The micro-diffusion pump provided by the present invention adopts a wedge-shaped diffusion tube as its micro-valve, that is, adopts a wedge-shaped diffusion tube structure with different forward and reverse flow pressure losses. The role of transport fluid. figure 1Schematic diagram of the micro-diffusion pump. It mainly includes: pump inlet 1, inlet diffuser pipe 2, pump chamber 3, outlet diffuser pipe 5, pump outlet 6, driving diaphragm vibration device 4 and electrode 7 in the pump chamber, and diffuser pipe 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 pipe 2 on the side of the pump inlet 1 is connected to the pump chamber 3, and the wedge-shaped diffuser pipe 5 on the side of the pump outlet 6 The narrow mouth is connected with the pump chamber 3. The shape of the pump chamber 3 can be a cylinder, cuboid, cube, prism, etc., and...

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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 fields of microfluid control, transmission and microactuator, and relates to a non-movable valve-plate 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 pools, and by controlling the flow of fluid, various functions on the chip system are completed. The core of the operation in the microfluidic chip system is the microfluidic drive, and the microfluidic drive is the basis of microfluidic technology. A micropump is a very important microactuator and the core component of a microfluidic control system. At present, micropumps prepared by micromachining (MEMS) technology are mainly divided into mechanical fluid control micropumps and non-mechanical fluid control micropumps. The inlet and outlet of mechanical micropumps need to be matched with two one-...

Claims

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Application Information

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Patent Type & Authority Patents(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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