HEAT EXCHANGING VENTILATION DEVICE WITH A FAN WHEEL FOR LIVING ROOMS OR WORKING SPACES

摘要

1. A heat-exchanging ventilation device for living or work-rooms, which device comprises an impeller wheel via whose blades (9, 109), which act as heat-exchange surfaces, heat is exchanged between warm and cold air, characterized in that - inner and outer coaxial air-guide tubes (5, 7, 105, 107) are provided and - the blades (9, 109) are hollow and aerodynamically shaped and extend across the space (25, 125) between the inner and outer air-guide tubes (5, 7, 105, 107), in which during operation the air which enters via the inner airguide tube (5, 105) is discharged outwards, and heat is transferred between the air flowing through the interior of the blades (9, 109) and the air flowing along the exterior of the blades (9, 109).