公开(公告)号：US20240208211A1

公开(公告)日：2024-06-27

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

CPC classification number: B41J2/04583 ,  B41J2/14451

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.