| 摘要 |
The invention relates to a ventilation device for ventilation room by room and/or zone by zone and comprises: a) a device casing ( 12 ), which is provided in or adjacent an outer wall of a building or the like and which connects room air to outside air, b) a heat-exchange ( 22 ) of counter flow type, provided in the casing ( 12 ) and transferring heat from the outgoing and in-going airflows, respectively, c) two fans ( 18,20 ) arranged in said casing ( 12 ), of which one is connected to the ingoing air duct ( 14 ) of the heat-exchanger ( 22 ) and the other to the outgoing air duct ( 16 ) of the heat-exchanger ( 22 ), d) at least one sensor ( 30 ) for determination of the airflow's relative deviation in velocity from a neutral value of the airflows passing through each respective duct ( 14, 16 ), and e) a control means ( 32 ), which, depending on the values given by the sensor ( 30 ), is arranged to regulate the rotation speed of the fans ( 18, 20 ), for the purpose of substantially balancing the airflow, so that it is substantially equal for the ingoing and outgoing air. |
