High-precision valve micro pump driven by temperature control shape memory alloy

Abstract

The invention discloses a high-precision valve micro pump driven by a temperature control shape memory alloy. The high-precision valve micro pump comprises a temperature control shape memory alloy spring II, a temperature control shape memory alloy spring I, a cooling ceramic pipe, an upper end cover, a pump body shell, a piston I end cover, a slide bearing, a snap spring, a connecting flange, an external driving joint, a piston II, a one-way valve, a pump cavity, a piston I, and electrifying terminals A, B, C and D; the cooling ceramic pipe is fixed on the upper end cover; the temperature control shape memory alloy springs I and II are inserted in the cooling ceramic pipe, and are positioned on two sides of the piston I end cover; the piston I can slide in the slide bearing; the slide bearing is mounted on the pump body shell; and the pump cavity is connected with the pump body shell through the connecting flange. Compared with a traditional micro pump, the high-precision valve micro pump is excellent in structure heat dissipating property, tightness and one-way stop performance, and can normally work under the condition of high frequency by using the cooling effect of the cooling ceramic pipe.

Description

technical field [0001] The invention relates to a high-precision valved micropump driven by a temperature-controlled shape memory alloy, which belongs to the technical field of micropumps. Background technique [0002] High-precision micropumps are widely used in chemical analysis and detection, bioengineering, clinical medicine, integrated circuit chips, micro components, and miniaturized production systems. The performance requirements of micropumps in this field are fast response, good one-way cut-off performance, good sealing, and high output pressure. Therefore, how to improve the response speed, output pressure and control precision of the micropump has become an important development direction of the micropump. [0003] At present, there are many types of high-precision micropumps at home and abroad. The main micropumps include high-precision micropumps driven by magnetically controlled shape memory alloys, high-precision micropumps driven by piezoelectric ceramics...

AI Technical Summary

Problems solved by technology

In order to solve the problems of the existing micropumps such as large size of the driving device, poor one-way cut-off performance, low driving frequency, and poor sealing

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