| 摘要 |
<p>The installation has, arranged on the inside in front of a building wall (3), an outgoing air box (4) which forms a first outgoing air channel (5) leading to a fan (7) arranged in an opening (6) in the same building wall (3). A housing (10), which surrounds the outgoing air box (4) in a U-shape at a distance, forms in front of the outgoing air box (4) between this and the housing (10) a second air channel (11) which is connected to the first outgoing air channel (5) via an opening (12). By means of a pivotable flap (3), the first or second outgoing air channel can be closed off in relation to the suction side of the fan (7) so that the outgoing air is conducted via one or the other outgoing air channel. In the second outgoing air channel (11), there is arranged a heat exchanger element (14) which is flowed through by the outgoing air. The housing (10) also forms, on opposite sides and adjoining each of the two outgoing air channels (5, 11), a fresh air channel (15, 16) which is connected to the heat exchanger element (14). With the aid of a fan (17) in one fresh air channel (16), fresh air sucked in from outside is conducted into the circuit through the heat exchanger element (14) and the heated fresh air is then conducted into the inner space of the building. For change-over from summer operation to winter operation with utilisation of the outgoing air for heating the fresh air, it is only necessary to pivot the flap (8). <IMAGE></p> |
