US 12,454,136 B2
Liquid ejection head and liquid ejection apparatus
Ryo Sato, Tokyo (JP); Kyosuke Toda, Kanagawa (JP); Takeho Miyashita, Kanagawa (JP); Shimpei Yoshikawa, Kanagawa (JP); and Chiaki Muraoka, Saitama (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on May 15, 2023, as Appl. No. 18/197,502.
Claims priority of application No. 2022-080217 (JP), filed on May 16, 2022.
Prior Publication US 2023/0364919 A1, Nov. 16, 2023
Int. Cl. B41J 2/175 (2006.01); B41J 2/045 (2006.01); B41J 2/14 (2006.01); C09D 11/322 (2014.01)
CPC B41J 2/17596 (2013.01) [B41J 2/04563 (2013.01); B41J 2/14032 (2013.01); B41J 2/0458 (2013.01); B41J 2/04581 (2013.01); B41J 2202/12 (2013.01); C09D 11/322 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A liquid ejection head comprising:
an ejection unit including an ejection element that generates ejection energy for ejecting supplied liquid;
a first pressure adjusting unit configured to be controlled to have a predetermined pressure;
a second pressure adjusting unit configured to be controlled to have a lower pressure than the predetermined pressure;
a pump configured to send liquid to outside of the pump; and
a temperature adjusting unit configured to adjust a temperature of liquid,
wherein a circulation channel for circulating liquid is configured at least with the ejection unit, the first pressure adjusting unit, the second pressure adjusting unit, the pump, and the temperature adjusting unit, and
wherein, in the circulation channel,
liquid supplied from outside flows into the first pressure adjusting unit and then flows out of the first pressure adjusting unit into the ejection unit and the second pressure adjusting unit,
the liquid that has flowed out of the ejection unit and the liquid that has flowed out of the first pressure adjusting unit flow into the second pressure adjusting unit and then flow out of the second pressure adjusting unit into the pump,
the pump sends the liquid that has flowed in from the second pressure adjusting unit to the first pressure adjusting unit, and
the temperature of the circulating liquid is adjusted by the temperature adjusting unit.