| 摘要 |
A droplet ejection apparatus comprising: a number of droplet ejection units (16) each of which has a nozzle (18) connected to a liquid chamber (20) and an actuator (28) for expelling droplets of a process liquid; a cleaning station (32); and a control system (44) arranged to control a relative movement of the droplet ejection units (16) and the cleaning station (32) and to immerse the nozzles (18) into a cleaning liquid (38), wherein a heater (30) is provided for heating the droplet ejection units (16), and the control system (44) is adapted to activate the heater (30) when the droplet ejection units (16) and the cleaning station (32) are moved or have been moved towards one another, and to deactivate the heater (30) to allow the droplet ejection units (16) to cool down while the nozzles (18) are immersed in the cleaning liquid (38). |
