| 摘要 |
Device for regulating the airflow in an air damper, comprising a twist sleeve (29, 210) of flexible material, the cross section of which substantially conforms to an outer tube (25, 201, 310) in which the flow takes place, one end (30, 211) of the twist sleeve (29, 210) being disposed on the inner side of the outer tube (25, 201, 310) and the other end (31, 212) of the twist sleeve (29, 210) being disposed in a tube sleeve (1, 202, 301) which can be rotated under an axial displacement controlled in relation to the rotation. The outer diameter of the tube sleeve (1, 202, 301) is somewhat smaller than the inner diameter of the outer tube (25, 201, 310), so that the tube sleeve (1, 202, 301) slides easily in the outer tube (25, 201, 301), and in which the tube sleeve (1, 202, 301) is provided with a helical slot (4, 204, 302), and in which the rotation of the tube sleeve (1, 202, 301) is achieved by an operating apparatus (7, 206, 207, 308) configured in such a way that the operating apparatus (7, 206, 207, 308) pulls round the tube sleeve (1, 202, 301), at the same time as the tube sleeve (1, 202, 301) moves axially. |
