| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of times of operation of a room pressure correction control valve in an air volume control system in which room pressure correction control is combined with air volume balance control.SOLUTION: An air volume control system includes: an air volume balance control part 1 for controlling an air supply valve and an exhaust valve in such a manner that a difference between an air supply volume adjusted by the air supply valve and an exhaust air volume adjusted by the exhaust valve coincides with an air volume set value; a room pressure correction control part 2 for controlling a room pressure correction control valve in such a manner that a differential pressure between a reference room set to a reference room pressure and an object facility coincides with a differential pressure set value; and an air volume correction part 4 for changing at least either of the air supply volume and the exhaust air volume determined according to an instruction from an air volume changing part 3 by the air volume balance control part 1 so that there is no change in the air volume of the room pressure correction control valve caused by changes in the air supply volume and the exhaust air volume when receiving the instruction of the air volume change from the air volume changing part 3.SELECTED DRAWING: Figure 2 |
