A dual-chamber electrically actuated valveless micropump

Abstract

A double-cavity type electric actuator valveless micropump comprises drive films and a micropump body. The micropump body comprises a pump body and a pump cover. The pump body comprises an upper pump body (2) and a lower pump body (1); the left end and the right end of the upper pump body (2) are provided with an outlet cavity and an inlet cavity respectively; the left end and the right end of the lower pump body (1) are provided with an inlet cavity and an outlet cavity respectively; an upper pump cavity (9) is arranged between the inlet cavity and the outlet cavity of the upper pump body (2); a lower pump cavity (18) is arranged between the inlet cavity and the outlet cavity of the lower pump body (1); the upper pump cavity (9) and the lower pump cavity (18) are opposite. The pump cover is divided into an upper pump cover (3), a middle pump cover (13) and a lower pump cover (15); the upper pump body (2) is located between the upper pump cover (3) and the middle pump cover (13); the lower pump body (1) is located between the middle pump cover (13) and the lower pump cover (15); the upper pump cavity (9) is communicated with the outlet cavity and the inlet cavity through a shrinkage flow pass and a diffusion flow pass; the lower pump cavity (18) is communicated with the outlet cavity and the inlet cavity through a shrinkage flow pass and a diffusion flow pass; the inlet cavity of the upper pump body (2) and the outlet cavity of the lower pump body (1) are communicated through a middle layer small hole (14); the three drive films cover a large hole in the upper pump cover (3), a large hole in the middle pump cover (13) and a large hole in the lower pump cover (15) respectively.

Description

technical field [0001] The invention relates to a delivery device for micro-flow liquid. Background technique [0002] The micro-flow system can accurately detect and control the flow rate of microliters per minute. As the core component of the system, the micropump has become a research hotspot of domestic and foreign scholars in recent years. Because the micropump can infuse a certain amount of liquid and control the infusion speed, it is used to infuse special drugs that require accurate and stable infusion speed. Such as cardiotonic agents, vasoactive drugs, etc., and thus widely used in biopharmaceuticals. For example, diabetics used to inject a large dose of insulin at one time, which not only caused waste, but also had a short duration of drug action. Therefore, there is a great need for a continuous drip device that can control the flow rate in a small amount. In this kind of fine flow control box and detection system, the micro pump is a basic element. [0003] ...

AI Technical Summary

Problems solved by technology

The invention can reduce the pulsation of the liquid flow, and improve the problems of low working efficiency and pulsation interference of the existing valveless micropump

The invention has small initial volume and static volume, large compression ratio, good reproducibility and high reliability

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