Portable vacuum cleaner equipped with an acoustic absorption wall
A portable vacuum cleaner includes a main body equipped with a suction duct, and a suction motor housed in the main body and configured to generate an air flow through the suction duct. The main body includes an air exhaust circuit through which the air flow generated by the suction motor is exhausted to the outside of the main body. The air exhaust circuit includes a filter having a generally cylindrical shape and delimiting an internal chamber fluidly connected to an air discharge orifice of the suction motor, and an acoustic absorption wall extending at least partly into the internal chamber of the filter, an internal surface of the filter and the acoustic absorption wall delimiting a first air conduit and a second air conduit in each of which is configured to circulate a part of the air flow.
1 . A portable vacuum cleaner comprising: a main body including a suction duct, a waste separation and collection device mounted on the main body, and a suction motor housed in the main body, the suction motor having a motor axis and configured to generate an air flow through the suction duct and the waste separation and collection device, the main body further comprising an air exhaust circuit through which the air flow generated by the suction motor is exhausted to an outside of the main body, the air exhaust circuit including a filter configured to filter air flowing through the air exhaust circuit, wherein the filter is substantially cylindrical and includes an internal surface defining an internal chamber fluidly connected to an air discharge orifice of the suction motor, the air exhaust circuit including an acoustic absorption wall extending at least partly into the internal chamber of the filter, the internal surface of the filter and the acoustic absorption wall defining a first air conduit and a second air conduit, each configured to circulate a portion of air flow.
2 . The portable vacuum cleaner according to claim 1 , wherein the internal chamber includes a first open end and a second closed end opposite the first open end, the first open end oriented towards the suction motor.
3 . The portable vacuum cleaner according to claim 2 , wherein the acoustic absorption wall includes a first end portion and a second end portion opposite the first end portion, the first end portion located adjacent the first open end of the internal chamber or located such that the first end portion projects out of the internal chamber from the first open end.
4 . The portable vacuum cleaner according to claim 2 , wherein the air exhaust circuit further comprises an additional acoustic absorption element made of porous material and located upstream of the filter, the additional acoustic absorption element including a passage opening fluidly connected to the air discharge orifice of the suction motor and located opposite the first open end of the internal chamber of the filter.
5 . The portable vacuum cleaner according to claim 4 , wherein the acoustic absorption wall extends partially into the passage opening.
6 . The portable vacuum cleaner according to claim 4 , wherein the additional acoustic absorption element is an acoustic foam.
7 . The portable vacuum cleaner according to claim 1 , wherein the acoustic absorption wall is substantially planar and extends along an extension plane.
8 . The portable vacuum cleaner-according to claim 7 , wherein the filter has a longitudinal axis at a center of the filter, and wherein the extension plane of the acoustic absorption wall is substantially parallel to the longitudinal axis of the filter.
9 . The portable vacuum cleaner-according to claim 8 , wherein the longitudinal axis of the filter extends substantially coaxially with the motor axis of the suction motor.
10 . The portable vacuum cleaner according to claim 1 , wherein the motor axis of the suction motor intersects the acoustic absorption wall.
11 . The portable vacuum cleaner according to claim 1 , wherein the acoustic absorption wall includes a structural support element and an acoustic absorption member made of porous material and fastened to the structural support element.
12 . The portable vacuum cleaner according to claim 11 , wherein the structural support element is perforated.
13 . The portable vacuum cleaner according to claim 11 , wherein the acoustic absorption member includes a first acoustic absorption portion and a second acoustic absorption portion each being substantially planar and extending substantially parallel to each other, and a third acoustic absorption portion connecting the first and second acoustic absorption portions, the structural support element disposed between the first and second acoustic absorption portions.
14 . The portable vacuum cleaner according to claim 1 , wherein the air exhaust circuit-comprises at least one air exhaust opening provided on the main body and through which the air flow generated by the suction motor is exhausted outside the vacuum cleaner, the at least one air exhaust opening extending substantially perpendicular to the acoustic absorption wall.