Experimental study of piezoelectric microfluidic hybrid pump with double-inlet and double-chamber

Abstract

In order to investigate the factors affecting the fluid mixing ratio in the piezoelectric hybrid pump, so as to make a reference for designing the piezoelectric hybrid pump that can accurately adjust the fluid mixing ratio, this paper analyzes the factors affecting the fluid mixing ratio of the piezoelectric pump and proposes a piezoelectric microfluidic hybrid pump with double-inlet and double-chamber. On the basis of analyzing the working principle of liquid transfer and liquid mixing of this piezoelectric pump, the effect of the different heights of the pump chamber on both sides of the piezoelectric pump on the input liquid flow rate on both sides and the effect of the different depth of the seal groove at the piezoelectric vibrator on the input liquid flow rate on both sides are experimentally investigated. The experiments show that the different depths of the seal grooves on both sides of the double-inlet double-chamber piezoelectric pump will cause changes in the inlet suction flow on both sides, and in the range of 30 to 110Hz, the flow rate difference between the two inlets can be up to 10ml/min; there exists a pump chamber with a better performance of 1mm in height, one side with a pump chamber height of The results show that the different seal groove depth and pump chamber depth on both sides of the piezoelectric pump will make the suction flow on both sides different, which has good reference value for the study of adjusting the mixing ratio.