| 摘要 |
An air-jet cleaning device (15), for cleaning the fine parallel passages (11) of a throttling member (14) of a ventilation system, has a hollow, divided central shaft (20) and two box-shaped shields (30 and 32) arranged against the inlet and the outlet surfaces of the throttling member (14). The air-jet cleaning device is rotated by a motor or by air impinging on vane 48 to sweep across the surfaces of the throttling member and diverts part of the air flowing through the throttling member in the reverse direction to that of the main flow so that the passages are cleaned by a reverse jet of air. The two air streams (54) flow through the two passages in shaft (20), and dust removed from the throttling member is carried into the main air stream at (56). <IMAGE> |
