Patent ID: 11859641
Assignee: nan
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  G | IPC F  G

Claim 0:
1. An air blower, the air blower comprising:
an intake housing comprising an inlet, the inlet positioned to receive air into the air blower;
an impeller, the impeller positioned to draw the air through the intake housing and into the impeller;
an outlet, the outlet positioned to receive air from the impeller and expel the air from the air blower;
a flow modulator tube assembly positioned to receive the air from the intake housing and direct the air to the impeller, wherein the flow modulator tube assembly comprises a shell and a plurality of vanes positioned within the shell, the vanes extending axially along a length of the shell and contacting the shell along the length of the shell, wherein the vanes define a plurality of separate air flow paths that extend through the flow modulator tube assembly, from a first end of the flow modulator tube assembly to a second end of the flow modulator tube assembly, and wherein the plurality of separate air flow paths are fluidically isolated from one another between the first and second ends;
a sound damper positioned in the intake housing, wherein the sound damper has a surface positioned to receive sound from the flow modulator tube assembly;
one or more baffles positioned within the intake housing, wherein each of the one or more baffles comprises an angled wall positioned at an angle relative to the surface of the sound damper such that the one or more baffles direct air from the intake housing into the flow modulator tube assembly;
wherein the vanes divide the air and sound into the plurality of separate air flow paths that comprise void spaces between the vanes and the shell, wherein the vanes straighten the flow of the air through the flow modulator tube assembly and direct the air to the impeller, and wherein the vanes straighten the propagation of sound through the flow modulator tube assembly and direct sound along a path to impact with the sound damper.