Fan and electric motor cooling device for ventilation case of controlled mechanical ventilation installation, has thermodeformable element with strip blocking trap door until predetermined temperature, where door is provided with notches

摘要

The device has a trap door (7) for supplying fresh air. The trap door is integrated in a wall (2) of a case (1) and opened beyond a predetermined temperature by displacement of a thermodeformable element (8). The thermodeformable element comprises a bimetallic strip for blocking the trap door until the predetermined temperature. The trap door is provided with notches. The strip is arranged with respect to the notches such that a free end supported on the trap door beside the notches blocks the trap door until the predetermined temperature.