Abstract: A motorised respiratory assistance device with an integrated cooling system including an enclosure (1) forming a compartment (2) accommodating a motor unit (3) driving turbines (8a, 8b) generating a main respiratory assistance air flow (F1) and a secondary air flow (F2) for cooling the motor (5). The secondary air flow (F2) is conveyed by a secondary aeraulic path (E2, E4, E5, 22, E3, S2) that includes an inner portion (E2, E4, E5, 22) extending into the motor (5) between the stator (6a) and the rotor (6b) and an outer portion (E3, S2) that extends into an annular space (E3) provided around the motor unit (3). The cooling air flow (F2) flows in opposing directions in the inner (E4) and outer (E3) portions, and the main aeraulic path (E1, E6, S1) and the secondary aeraulic path (E2, E4, E5, 22, E3, S2) are separated from each other by a partition (18).

Abstract: The apparatus (1) includes a fan (2) having a motor (5), an impeller (6) and a fan scroll (7). The motor (5) being contained in a motor casing (8) having a first end connected to the fan scroll (7) and an opposite second end; and a casing (22) receiving the fan (2), defining around that fan (2) a space (23) for flow of gas for cooling the fan (2) having an inlet (24). The first end of the casing (8) includes at least one first hole (10) and the second end of the casing (8) includes at least one second hole (11) separated from the inlet (24) to prevent capture of the hot cooling gas leaving the casing (8) by the inlet (24).

Abstract: This apparatus (1) includes a fan (2) constituted by a motor (5), an impeller (6) and a fan scroll (7), the motor (5) being contained in a motor casing (8) having a first end connected to the fan scroll (7) and an opposite second end; and a casing (22) receiving the fan (2), defining around that fan (2) a space (23) for flow of gas for cooling the fan (2) having an inlet (24). According to the invention the first end of the casing (8) includes at least one first hole (10); and the second end of the casing (8) includes at least one second hole (11) separated from the inlet (24) in such a manner as to prevent capture of the hot cooling gas leaving the casing (8) by the inlet (24).

Abstract: This apparatus (1) includes an air intake duct, a volute (5) of which the inlet opening (22) communicates with the air intake duct, a first vane rotor (4) located immediately downstream of the inlet opening (22) of the volute (5), a motor (3) for driving the rotor (4), and a motor (3) for rotating the rotor (4) in order to generate a centrifugal air flow in the volute (5). The apparatus further includes: a casing (2) having a tubular portion (10a) located at a substantially constant distance from the motor (3), the casing (2) and the motor (3) thereby together bounding a gas flow passage (15) including at least one gas inlet orifice (20) and at least one gas outlet orifice (16); and a second vane rotor (6) located downstream of the gas inlet orifice (20) rotated in order to generate a forced gas stream in the gas flow passage (15).

Abstract: An apparatus (1) includes a housing (2), an air feed duct (21) a volute (5), an impeller (4), and a motor (3) for driving the rotation of the impeller (4) so as to generate a centrifugal air flow in the volute (5). The housing (2) has a first part (18a) where wall is intended, after assembly, to extend around the motor (3), espousing the shape of this motor (3) in such a way as to lie at a substantially constant distance from this motor (3); and a second part (18b, 19) where wall is intended, after assembly, to extend around the volute (5), espousing the shape of this volute (5) so as to lie at a substantially constant distance from this volute (5). The housing (2) internally forms a salient axial lump (20) which, after assembly, sits close to the hub (10) of the impeller (4).

Abstract: This fan (1) includes a volute (2) whose inlet opening (3) is in communication with the oxygen feed line, an impeller (4) situated immediately downstream of the inlet opening of the volute and including an inlet opening connected to this inlet opening (3) of the volute and outlet orifices (4a) emerging into the volute (2), and an electric motor (5) for rotating the impeller (4). The fan (1) includes: —a compartment (6) in which the motor (5) and, where appropriate, other electric elements or components belonging to the fan (1) are placed, this compartment (6) including an end wall (13) traversed by the shaft of the motor (5) and being supplied with pressurized air, and—a leak collection chamber (7) situated intermediately between the volute (2) and the compartment (6), this chamber likewise being traversed by the shaft of the motor (5) and including a discharge orifice (20).