| 摘要 |
<p>The height adjustable movement of heating tubes (6) is achieved, using vertical positioned hoist cables. A hot house (1) includes a support frame with uprights (2), and interconnected beams (3) on which the roof (4) rests A heating unit (5) has horizontal, parallel positioned heating tubes (6) at regular intervals suspended from cables (7) connected to the beams. A displacement unit includes a horizontal rotray lifting shaft (11), to which hoist cables (9) are connected When the shaft rotates, the tubes move up and down, depending on the direction of rotation of the shaft.</p> |
