| 摘要 |
Conventional heat-recovery units include an outer housing and a heat-recover y cell with two separate air passages therethrough opening on faces of the cell. In the present invention the upstream face of each passage is adjacent and inclined at 90.degree. to the downstream face of the other passage. A turret on the housing at each inlet and outlet is rotatable about its axis and has an angled coupling rotatable on the turret about an axis at rig ht- angles to the axis of the turret. The inlet, upstream turrets each contain a filter and th e outlet, downstream turrets each contain a centrifugal fan. |
