Suction device, suction method, and ejection device

摘要

A suction device for an ejection head provided with a nozzle includes a cap capable of sealing a nozzle surface provided with the nozzle, a decompression pump serving as a decompression device, and a suction passage provided between the cap and the decompression pump. The negative pressure level of the suction passage set by the decompression pump are controlled on the basis of a volume of the suction passage such that a liquid with which the ejection head has been filled is sucked out from the nozzle.

主权项

1. A suction device for an ejection head provided with a plurality of nozzles, comprising:
a cap that is configured to seal a nozzle surface provided with the nozzles, a decompression device, a suction passage provided between the cap and the decompression device, a first valve provided in the suction passage between the cap and the decompression device, a second valve provided in the suction passage between the first valve and the decompression device, a first section in the suction passage between the first valve and the second valve, the ejection head including
a liquid supply port, anda cavity that is configured to retain the liquid supplied form the liquid supply port, in communication with the nozzles, and the first section configured to be decompressed by the decompression device such that a volume of liquid is sucked out from the ejection head to the first section via the nozzles and the cap, and the volume of liquid sucked out being set to be equal to or less than a volume in the ejection head from the liquid supply port to the nozzles including the cavity.