| 摘要 |
A device for utilising heat from the expelled air by ventilation comprises a heat exchanger with a cell construction 2 wherein heat from the warm expelled air is transferred to cold intake air by the expelled air and the intake air passing through close cells which are separated by heat exchanging surfaces. In order to utilise the heat in the expelled warm air in the best possible way, one or more circulation zones I, II, III are provided for the airflow through the heat exchanger. Said circulation zones I, II, III are each adapted to having part of the air flowing through the cells passing a smaller or larger distance backwards in the flow path via openings 10, 11, 13 and channels by means of blowers 9, 12, 16. Hereby, the turbulence of the airflow and thereby the heat exchanging effect is increased. <IMAGE> |
