Micropump

Abstract

A micropump comprises an air inlet plate, a resonance sheet, a piezoelectric actuator, an insulation sheet and a conductive sheet stacked sequentially, wherein the air inlet plate is provided with atleast one air inlet hole, at least one confluence discharging hole and a confluence chamber; the resonance sheet is provided with a hollow hole; a chamber space is defined between the resonance sheetand the piezoelectric actuator; the piezoelectric actuator comprises a suspension plate, an outer frame, at least one connecting part and a piezoelectric element; the at least one connecting part is connected between the suspension plate and the outer frame and defines at least one gap for gas flowing; and the conductive sheet is provided with a plurality of contact conductive ends for being electrically connected to the piezoelectric element. When the piezoelectric actuator is driven, the gas is introduced through the at least one air inlet hole, and then introduced into the chamber space after flowing through the confluence chamber and the hollow hole; and then the gas is discharged through the at least one gap so as to realize gas transmission.

Description

technical field [0001] This case is about a pneumatic power device, especially a tiny ultra-thin and silent micro-pump. Background technique [0002] At present, in various fields, whether it is medicine, computer technology, printing, energy and other industries, products are developing in the direction of refinement and miniaturization. Among them, micro-pumps, sprayers, inkjet heads, industrial printing devices and other products contain fluid transportation. Structure is its key technology, so how to use innovative structure to break through its technical bottleneck is an important content of development. [0003] For example, in the pharmaceutical industry, many instruments or equipments that need to be driven by pneumatic power usually use traditional motors and pneumatic valves to achieve the purpose of gas delivery. However, due to the volume limitation of such traditional motors and gas valves, it is difficult for such instruments to reduce the overall size of the ...

AI Technical Summary

Problems solved by technology

[0006] Another purpose of this case is to provide a micropump, which is different from the known piezoelectric element that uses welding conductive wires on the electrodes to achieve the connection electrical function of the electrodes. In this case, the electrode of the piezoelectric element uses no The design of the contact conductive end of the welding overcomes the way that the above-mentioned electrodes are led out by wires, which greatly reduces the complicated process of assembly, and does not use solder spot welding, so there is no high temperature that will affect the piezoelectric properties of the local or even the overall piezoelectric element The problem of attenuation, as well as the lack of solder joints and the quality and volume of the welding colloid itself will cause unavoidable space constraints and uneven actuation problems inside the micro pump.

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