Ventilation device for ventilating inner space of motor car, has wheel rim connecting hub with blade ring and comprising apertures for connecting flows that are associated with fresh and circulating air tracts, respectively

摘要

The device (1) has a radial fan (4) for sucking fresh air through a fresh air tract (2). A fresh air flap (21) controls a fresh air aperture (20). A circulating air flap (31) controls the air circulating through a circulating air aperture (30) of a circulating air tract (3). The fan comprises a double-sided suction end, double-flow impeller (40), where flows (46, 47) of the impeller are separated by a wheel rim (42). The rim connects a hub (41) with a blade ring (43) and comprises apertures for connecting the flows that are associated with the fresh and circulating tracts, respectively.