MICRO-BLOWER HAVING IMPROVED SEALING FOR A MEDICAL VENTILATOR, AND METHOD FOR THE ASSEMBLY THEREOF

摘要

Abstract The invention relates to a micro-blower (1) comprising an electric motor (2) having a rotary shaft (3) bearing a vane 5 wheel (4), said electric motor (2) being contained in a peripheral cowling (5), said vane wheel (4) being arranged between a lower volute (6) and an upper volute (7), the lower volute (6) comprising a central passage (8) encircling the peripheral surface (9) of the cowling (5). The cowling (5) of 10 the motor comprises an upper peripheral lip (10) that projects radially away from the external peripheral surface (9) of the cowling (5). The central passage (8) of the lower volute (6) is bordered internally by an annular shoulder (11), an annular seal (14) being arranged on said annular shoulder (11). The 15 lower volute (6) also comprises a number of internal stops (12) that are borne by the internal surface (13) of the lower volute (6). The upper peripheral lip (10) of the cowling (5) of the motor is positioned between the annular seal (14) and the internal stops (12) of the lower volute (6), said internal 20 stops (12) bearing against said upper peripheral lip (10) of the cowling (5) of the motor so as to achieve compression of the annular seal (14) between said upper peripheral lip (10) of the cowling (5) and the annular shoulder (11) of the lower volute (6). 724 23 7a 6a 22 FIG. 2a 2,5 22FIG. 2b