Liquid ejecting apparatus

摘要

A liquid storage unit for collecting a liquid supplied to an ejecting head is provided. The liquid is supplied to a plurality of ejecting heads via a pressure regulating valve, and the liquid is suctioned from the plurality of ejecting heads by a circulation pump, and then is discharged to the liquid storage unit. In this way, since the liquid is suctioned from each of the ejecting heads, the passage resistance is decreased, so that the ink can be appropriately circulated. In addition, since the ejecting head is supplied with the liquid at an appropriate pressure from the liquid storage unit via the pressure adjusting valve, the liquid can be appropriately ejected.

主权项

1. A liquid ejecting apparatus which supplies a liquid, which is received in a liquid container, to a plurality of ejecting heads, and ejects the liquid from ejecting nozzles of the ejecting heads, the liquid ejecting apparatus comprising:
a liquid storage unit which is provided at an upstream side of the plurality of ejecting heads, and stores the liquid supplied to the ejecting heads via a liquid supply passage; a pressure regulating valve which is provided between the liquid storage unit and the plurality of ejecting heads, and opens a valve if a pressure of the liquid inside the ejecting heads is dropped to a predetermined pressure or less, so that the liquid received from the liquid storage unit side is supplied to the ejecting heads to regulate the pressure of the liquid inside the ejecting heads; a circulation pump which suctions the liquid inside the ejecting heads from a liquid circulation port provided in each of the plurality of ejecting heads and through one or more circulation passages to discharge the liquid to the liquid storage unit, thereby circulating the liquid between the plurality of ejecting heads and the liquid storage unit; a liquid passage which supplies the liquid from a liquid container to the liquid storage unit, the liquid passage being separate from the one or more circulation passages; a first check valve which prevents the liquid from flowing back from the ejecting head in a direction towards the pressure regulating valve, the first check valve being provided in the liquid supply passage between a respective ejecting head of the plurality and the pressure regulating valve for each ejecting head of the plurality; and a second check valve which prevents the liquid suctioned from the liquid circulation port from flowing back into the ejecting head, the second check valve being provided between a respective liquid circulation port of the plurality and the circulation pump for each liquid circulation port of the plurality.