US 11,724,505 B1
Maintenance system for spray head, inkjet printer, maintenance method and printing method
Shuzhang Liao, Shenzhen (CN); Hua Jiang, Shenzhen (CN); Leile Zeng, Shenzhen (CN); and Wei Lin, Shenzhen (CN)
Assigned to SHENZHEN CNTOP DIGITAL EQUIPMENT CO., LTD., Shenzhen (CN)
Filed by SHENZHEN CNTOP DIGITAL EQUIPMENT CO., LTD., Shenzhen (CN)
Filed on Sep. 16, 2022, as Appl. No. 17/946,107.
Int. Cl. B41J 2/17 (2006.01); B41J 2/18 (2006.01)
CPC B41J 2/1707 (2013.01) [B41J 2/18 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A maintenance system for a spray head comprising:
a controller;
an ink circulation loop, comprising a main container, a first regulating device and a spray head which are arranged in sequence along the ink delivery direction, the first regulating device being respectively connected with the main container and the spray head through pipelines, the spray head being connected with the main container, the first regulating device being connected with the controller;
wherein the main container is configured to store ink;
the first regulating device comprises a first accommodating cavity for storing first gas and ink flowing in from the main container, the first regulating device is configured to regulate a first air pressure of the first gas;
the spray head comprises an ink cavity and a plurality of spray holes, the ink cavity is in communication with the external environment through the spray holes, and the ink cavity is connected with the first accommodating cavity and the main container through pipelines; and
the controller is configured to control the first air pressure to change within a first negative pressure range by the first regulating device to make the ink in the ink cavity oscillate, when the ink in the ink circulation loop is in a circulating flow state; wherein an oscillation direction of the ink comprises the length direction of the spray holes.