Liquid ejecting apparatus and method for pressurizing and depressurizing

摘要

A degassing process where gas is removed by depressurizing a liquid to be less than atmospheric pressure and a pressurizing process where the liquid is pressurized to be more than the atmospheric pressure are executed at a low cost and taking up less space. There is provided a head configured to eject a liquid from a nozzle, a supply section configured to supply the liquid to the head and including a degassing section in which the liquid supplied to the head is depressurized to be less than atmospheric pressure, and a pressurizing section in which the liquid is pressurized to be more than the atmospheric pressure, and a single pump having an action of depressurizing the degassing section and an action of pressurizing the pressurizing section.

主权项

1. A liquid ejecting apparatus comprising:
a head configured to eject a liquid from a nozzle; a retaining section configured to retain the liquid; a supply section configured to supply the liquid to the head, the supply section including a degassing section disposed between the retaining section and the head to depressurize the liquid supplied from the retaining section to the head to be less than atmospheric pressure, and a pressurizing section in which the liquid retained in the retaining section is pressurized to be more than the atmospheric pressure; a pump having an action of depressurizing the degassing section and an action of pressurizing the pressurizing section; a pressurizing buffer tank configured to accumulate positive pressure by being pressurized by the pump, the pressurizing section being further configured to pressurize the liquid using the pressurizing buffer tank; and a depressurizing buffer tank configured to accumulate negative pressure by being depressurized by the pump, the degassing section being further configured to execute degassing by depressurizing the liquid using the depressurizing buffer tank.