Micropump for pumping a fluid from a fluid container to a distribution point, and process for pumping a fluid from a container to a distribution point through it

摘要

"MICRO-PUMP TO PUMP A FLUID FROM A FLUID CONTAINER TO A DISTRIBUTION POINT, AND, PROCESS TO PUMP A FLUID FROM A CONTAINER TO A DISTRIBUTION POINT THROUGH THE SAME" a piezoelectric micro-pump (10) to pump fluid from a container is described (14) for a distribution point, in low volumes and at controlled flow rates. The pumping action is created by the movements of two or three diaphragms (40, 42, 44). The movement of each diaphragm is caused by the expansion and contraction of an attached piezoelectric actuator (46, 48, 50). The coordination of the movement of the diaphragms (40, 42, 44) creates unidirectional flow of the fluid. The piezoelectric actuators (46, 48, 50) are in balance between the pump housing (22) and the diaphragms (40, 42, 44) to provide greater deflection of the diaphragms (40, 42, 44). Piezoelectric actuators (46, 48, 50) are preferably piezoelectric bimorphs such that the diaphragms (40, 42, 44) can function as both seals and pumps.