Development of one-side actuating liquid cooling diaphragm micropump for a multimedia system

An innovative one-side actuating piezoelectric micropump (OAPCP-micropump), which is combined with a 45 mm × 28 mm × 4 mm cold plate chamber, has been developed to drive liquid in a cooling system for a laptop. The results show that the shape and the numbers of the fins inside the cold plate chamber have strong effects on the pressure drops and flow profiles. The fluid in the pump chamber may impinge on the fins and increase the heat dissipation rate due to the oscillation by the actuator. The measured maximum flow rate of the OAPCP-micropump is 4.1 ml/s, and its maximum pump head reaches 9807 Pa. The new cooling system with an OAPCP-micropump design shows a stable performance on total thermal resistance due to the high flow rate.