US 12,270,420 B2
Noise reduction for air flow devices
Philip Tennison Reilly, Gloucester (GB); Peter Harley, Malmesbury (GB); Christopher Ashley Monk, Royal Wootton Bassett (GB); and Ignacio Justo Perez Pablos, Malmesbury (GB)
Assigned to Dyson Technology Limited, Malmesbury (GB)
Appl. No. 18/288,125
Filed by Dyson Technology Limited, Wiltshire (GB)
PCT Filed Apr. 19, 2022, PCT No. PCT/GB2022/050978
§ 371(c)(1), (2) Date Oct. 24, 2023,
PCT Pub. No. WO2022/229596, PCT Pub. Date Nov. 3, 2022.
Claims priority of application No. 2106115 (GB), filed on Apr. 29, 2021; and application No. 2108931 (GB), filed on Jun. 22, 2021.
Prior Publication US 2024/0200576 A1, Jun. 20, 2024
Int. Cl. F04D 29/66 (2006.01); F04D 17/10 (2006.01)
CPC F04D 29/665 (2013.01) [F04D 17/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A device configured to generate an air flow, the device comprising:
a compressor;
an air flow duct arranged to convey a flow of air generated by the compressor;
a gas-filled cavity disposed beside the air flow duct;
a wall separating the air flow duct and the cavity, the wall comprising at least one aperture; and
an acoustic resistive screen covering and held in tension over the aperture of the wall, the screen being in fluid contact with air in the air flow duct and gas in the cavity and being configured to resist air flow between the duct and the cavity;
wherein the resistive screen and the cavity together define a noise-damping resonator.