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Mini self-priming pump

A micro-pump, self-priming technology, applied in the direction of pumps, pumps with flexible working elements, liquid variable-capacity machines, etc., can solve the problems of difficult processing technology, unstable work, short service life, etc. The effect of working stability and improving service life

Inactive Publication Date: 2008-02-13
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems of difficult processing technology, short service life and unstable work in the prior art, and provide a self-priming micro pump combined with an active valve and a variable gap elastic buffer mechanism

Method used

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  • Mini self-priming pump
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  • Mini self-priming pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The first tapered diffuser tube 6 , the tapered constricted tube 7 and the second tapered diffuser tube 8 are all in communication with the pump chamber 2 . The small mouth end of the tapered shrink tube 7 is in contact with the top plate 1 of the pump body, and the tapered shrink tube 7 is normally closed. The large mouth ends of the first tapered diffuser tube 6 and the second tapered diffuser tube 8 are located in the pump chamber 2 and are in a normally open state. The valve seat 3 is located in the middle of the pump chamber 2, and the shape of the pump chamber 2 is square or circular. The small mouth end of the tapered shrink tube 7 is located at the center of the valve seat 3 protruding from the middle of the pump chamber 2 , and the size of the small mouth end of the tapered shrink tube 7 is smaller than that of the valve seat 3 . The height of the upper surface of the valve seat 3 is higher than or equal to the upper surface around the lower plate 5 of the pum...

Embodiment 2

[0029] As shown in Figure 3, it is a piezoelectric-driven single-injection and double-outlet micropump. A tapered shrink tube 6, a tapered diffuser tube 7, a second tapered shrink tube 8, and a driver fixing member 9; the pump chamber 2 adopts a circular or square single cavity, and a single injection port is composed of a tapered shrink tube 7; The first tapered diffuser 6 and the second tapered diffuser 8 form double sample outlets. The lower piece 5 of the pump body is made of silicon wafers; the upper piece 1 of the pump body is a PDMS (polydimethylsiloxane) pump membrane. Wherein, the lower piece 5 of the pump body has a pump cavity 2 , a valve seat 3 , a first tapered diffuser 6 and a second tapered diffuser 8 .

[0030] When an AC voltage is applied to the device, this embodiment can be used as a micropump and self-priming; when a DC voltage is applied to the device, it can be used as a micro valve. The upper part of the pump body 1, the pump chamber 2, the valve seat...

Embodiment 3

[0034] As shown in Figure 4, it is also a single-injection and single-outlet micropump, including the upper piece of the pump body 1, the pump chamber 2, the valve seat 3, the driver 4, the lower piece of the pump body 5, the first conical diffuser tube 6, and the conical constriction tube. Tube 7. There is a tapered diffuser tube 6 and a tapered shrink tube 7 on the lower part of the pump body 5, and the pump chamber 2 adopts a single-chamber structure. Its working principle and geometric dimensions are the same as the example shown in Fig. 3, except that there is one diffuser tube missing.

[0035] Fig. 5 is a photo of the micropump of the embodiment.

[0036]Figure 6 is the relationship curve between the flow rate and the driving voltage in Figure 4 of the embodiment. It can be seen from the figure that: under the condition of zero back pressure, when the driving voltage is 100V, the maximum flow rate reaches 5000μL / min, and the flow rate is almost linear with the voltage....

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Abstract

The invention discloses a novel mini pump capable of self-priming, and effectively settles the problems of periodical fluctuation, unstable flow, failure to self-prim, inapplicability to gas working substances, and so on. With the pump, the output flow is more stable and capable of continuous adjusting and complete self-priming, and no sample injection is required. The pump is not only applicable to liquid working substances, but also applicable to gas working substances, so the using scope of the mini pump is enlarged and the usable life and working stability of the mini pump is increased. The novel mini pump is simple in the structure. The pump comprises a lower pump plate, an upper pump plate, a drive, a pump chamber, a valve seat, a first cone diffusion pipe, a cone contraction pipe, and a second cone diffusion pipe, and is provided with the advantages of the quick response, the broad drive frequency, the strong controllability, the low power consumption, the long usable life, the small dimension, the simple manufacture technique, the low cost, and so on. In addition, the invention can be manufactured by using the technique of micro-processing and materials compatible with the micro mechanical technology, and can be integrated easily with other micro tests, micro-controlled elements and so on. The invention is suitable for mass production and is provided with a very wide application prospect.

Description

technical field [0001] The invention belongs to the field of micro-electromechanical systems, and relates to micro-fluid transmission and control technologies, in particular to micro-pump structures. Background technique [0002] In recent years, MEMS (Micro-Electro-Mechanical System) is a micro-device or system that integrates micro-mechanisms, micro-sensors, micro-actuators, signal processing and control circuits, and even interfaces, communications, and power supplies. Based on mechanical and material science, research, design, and manufacture of micro-devices with specific functions. Using micromachining technology to make microfluidic devices, which are used to transport, detect and control microliter flow and fluid devices, it is the basis of microfluidic systems, among which microvalve, micropump, microchannel and microflow sensor are the most Representative microfluidic devices. [0003] Due to the advantages of small size, simple operation, convenient installation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B43/04
Inventor 崔大付耿照新王海宁
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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