| 摘要 |
PROBLEM TO BE SOLVED: To provide a damper device that can reliably control a flow of gas by optimizing a mechanism related to the opening and closing of damper blades and a flow path shape and moving the damper blades smoothly and also can suppress a leakage in a closed state and a pressure loss in an open state.SOLUTION: A damper device is capable of: achieving a closed state of coming into abutment with a stopper part 12a of a frame 12 in the direction in which a damper blade 15 forms a right angle with the tube central axis of the frame 12, by making the damper blade 15 tiltable by tilting an arm part 14 around a turning shaft 13 of a flow path center in the frame 12 and using the tip of the arm part 14 as a tilting center, and also shifting the tilting center in the damper blade 15 from the blade center position; being moved to a closed state smoothly, even if narrowing an interval between the damper blade 15 and an inner circumferential surface of the frame 12, and also decreasing the amount of projection in the flow path of the stopper part 12a closing the gap between the damper blade 15 and the inner circumferential surface of the frame 12 in a closed state; and reducing a pressure loss by enlarging an open area in the frame 12. |
