Abstract: Ventilation device including a turbine mounted inside a radially volute-shaped casing, the peripheral wall of the casing moving progressively away from the periphery of the turbine from a volute tongue to a distal end (E2) of the volute, the radial expansion of the volute being defined by an angle of expansion (ai), characterised by the fact that the initial angle of expansion (a1) in the vicinity of the volute tongue is 1.5 times to 3 times greater than the final angle of expansion (a2) in the vicinity of the distal end (E2) of the volute, so that the peripheral wall of the casing moves away from the blades more rapidly at the start of the volute minimising the turbulences generated at the volute tongue.

Abstract: The invention relates to a sealing device for sealing and vibration isolation intended to plug the space between a heat exchanger and a pipe of a ventilation and air-conditioning system of a vehicle. The sealing device includes a thin closed frame, an inner seal able to plug the inner space situated between the frame and the exchanger, an outer seal able to plug the outer space situated between the frame and the pipe, inner vibration-damping studs extending from the inner face of the frame and being able to be in contact with the heat exchanger, outer vibration-damping studs extending from the outer face of the frame and being able to be in contact with the pipe for circulation of air, inner and outer studs together isolating the pipe from the exchanger, the inner and outer seals and the inner and outer studs being attached to the frame.

Abstract: Ventilation device including a turbine mounted inside a radially volute-shaped casing, the peripheral wall of the casing moving progressively away from the periphery of the turbine from a volute tongue to a distal end (E2) of the volute, the radial expansion of the volute being defined by an angle of expansion (ai), characterised by the fact that the initial angle of expansion (a1) in the vicinity of the volute tongue is 1.5 times to 3 times greater than the final angle of expansion (a2) in the vicinity of the distal end (E2) of the volute, so that the peripheral wall of the casing moves away from the blades more rapidly at the start of the volute minimising the turbulences generated at the volute tongue.