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Micro-fluid pump with multi-channel active control capability

An active control, microfluidic technology, applied in the direction of pumps with flexible working elements, pump control, components of pumping devices for elastic fluids, etc., to achieve the effect of light weight, good insulation performance, and simple structure

Inactive Publication Date: 2009-01-28
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no relevant technical reports on microfluidic pumps with multi-channel active control capabilities

Method used

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  • Micro-fluid pump with multi-channel active control capability
  • Micro-fluid pump with multi-channel active control capability
  • Micro-fluid pump with multi-channel active control capability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment one: refer to figure 1 and 2A -2C( Figure 2A is removed figure 1 Top view behind the pump cover and membrane actuator in, Figure 2B and Figure 2C is removed figure 1The top view behind the pump cover in ) is a cross-sectional view and a top view of the first embodiment of the eight-channel active control microfluidic pump of the present invention. One side center of the pump body 1 is provided with a cylindrical pump chamber 33 and circular cylindrical valve chambers 40, 45, 50, 55, 24, 62, 67 evenly distributed on the same circumference 284 as the center of the cylindrical pump chamber 33 , 72, and the coaxial cylindrical central holes 38, 44, 52, 57, 26, 60, 65, 74. The membrane actuator 14 covers the cylindrical cavity of the pump body 1 to form a pump cavity 33 , and a sealing ring 32 is provided between the membrane actuator 14 and the upper surface of the pump body 1 to prevent leakage. Thin film actuators 3, 284, 285, 286, 21, 287, 288, 289 ...

Embodiment 2

[0058] Embodiment two: refer to Figure 7 and 8 ( Figure 8 is removed Figure 7 The top view behind the thin film actuator in ) is a cross-sectional view and a top view of the second embodiment of the eight-channel active and precise control microfluidic pump of the present invention. Figure 7 and 8 The eight-channel active and precise control microfluidic pump embodiment of the present invention and figure 1 The main difference between the eight-channel active and precise control microfluidic pump embodiment of the present invention given in 2 is that the pump cavity 167 is different from the pump cavity 33 . Figure 7 and 8 The pump cavity 167 of the eight-channel active and precise control microfluidic pump embodiment of the present invention is a cylindrical through hole located in the center of the cylindrical pump body 1, and there is another one on the opposite side of the thin film actuator 14 of the microfluidic pump. The membrane actuator 85 and the membrane ...

Embodiment 3

[0059] Embodiment three: refer to Figure 9 and 10A , 10B( Figure 10A is removed Figure 9 Top view behind the pump cover and membrane actuator in, Figure 10B is removed Figure 9 The top view of the pump cover in the figure) is a cross-sectional view of the third embodiment of the eight-channel active and precise control microfluidic pump of the present invention and a top view after removing the pump cover and the membrane actuator. Figure 9 and 10A , 10B provides the embodiment of the eight-channel active and precise control microfluidic pump of the present invention and figure 1 The main difference from the embodiment of the eight-channel active and precise control microfluidic pump of the present invention given in 2 lies in the difference in the thin film actuators constituting the microfluidic valve. The thin film actuators 307, 308, 309, 310, 311, 312, 313, 314 constituting the microfluidic valves 239, 240, 241, 242, 243, 244, 245, 246 are respectively compose...

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Abstract

The invention discloses a multi-channel active control micro-pump. Microfluid active control valves with toroidal boundary are adopted to compose a plurality of liquid inlet valves and a plurality of liquid outlet valves; an electrically controllable film actuating element is adopted to cover an open face of a cylindrical counterbore of a pump body so as to compose a pump cavity which is connected with cylindrical liquid cavities of a plurality of microfluid valves; the cylindrical center hole liquid cavities of a plurality of micro fluidvalves are respectively connected with a liquid inlet and a liquid outlet. A control signal acting on a plurality of microfluid valves and the film actuating element of the pump is used for controlling the flow, pulse and outputting pressure of the pump. The microfluid pump of the invention is a microfluid pump which is controllable in multidirectional way and has active and precise control capability; a plurality of microfluid valves can be provided with the liquid inlet valves and the liquid outlet valves at will, and any microfluid valve can be in a closed state. The micro-pump of the invention can be used for adopting the same pump to provide microfluid for multiple objects simultaneously and to simultaneously obtain the microfluid and the mixture of the microfluid, etc., from multiple objects.

Description

technical field [0001] The invention belongs to the technical field of microfluid machinery, and in particular relates to a microfluid pump capable of realizing multi-channel active and precise control. Background technique [0002] With the rapid development of micromechanical and electronic science, in chemical analysis and detection, drug release, bioengineering, integrated circuit chips, micro components, miniaturized production systems (micro factories) and lab-on-chip (Lab-on-Chip), etc. In the field, there is an urgent need for a fluid delivery device that delivers a small flow rate and high precision. Scholars from various countries have proposed and studied various fluid pumps for this reason. During the research process, the focus of attention is how to improve the flow control accuracy of the pump and realize extremely low flow control. There is no good solution for how to get fluid from multiple fluid sources and how to pump fluid sources from the same pump cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B49/22F04B53/10F04B53/00F04B43/04
Inventor 王代华
Owner CHONGQING UNIV
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