Liquid ejection apparatus

Abstract

A liquid ejection apparatus is disclosed. One apparatus includes a nozzle through which fluid is ejected or purged, and a pressure regulating valve arranged upstream of the nozzle. The pressure regulating valve is configured to open in response to an open/close pressure differential of the fluid across the pressure regulating valve. The pressure regulating valve is configured to controllably regulate the open/close pressure differential. The apparatus further includes a controller configured to, when a suction pump is being operated to perform a first purging operation comprising creating a first negative pressure through suctioning by the suction pump to purge the fluid through the nozzle, control the pressure regulating valve to set the open/close pressure differential of the pressure regulating valve to a first value.

Dependencies are inferred from the claim text.