公开(公告)号：US12134271B2

公开(公告)日：2024-11-05

申请号：US18182577

申请日：2023-03-13

Applicant: SEMES CO., LTD.

Inventor： Dong Hwa Lee ,  Dai Geon Yoon ,  Bong Man Choi ,  Jong Suk Won ,  Hyeong Jun Cho

IPC: B41J2/045 ,  B41J2/14

Abstract: Provided is a pressure control device for stably controlling the internal air pressure of a reservoir. The pressure control device includes: an input terminal receiving source air pressure; an intake valve connected between the input terminal and an output terminal; an exhaust valve connected to the output terminal; a pressure sensor connected to the output terminal and generating a sensed value by sensing pressure at the output terminal; and a controller simultaneously operating the intake valve and the exhaust valve by simultaneously operating a first control loop for adjusting the degree of opening of the intake valve by comparing the sensed value with a first target value and a second control loop for adjusting the degree of opening of the exhaust valve by comparing the sensed value with a second target value.