US 12,480,515 B2
Compressor
Raul Corralejo Anton, Burgos (ES); Robert James Kyle, Bristol (GB); and Christopher Ashley Monk, Royal Wootton Bassett (GB)
Assigned to Dyson Technology Limited, Malmesbury (GB)
Appl. No. 18/290,258
Filed by Dyson Technology Limited, Wiltshire (GB)
PCT Filed May 6, 2022, PCT No. PCT/GB2022/051159
§ 371(c)(1), (2) Date Nov. 10, 2023,
PCT Pub. No. WO2022/238686, PCT Pub. Date Nov. 17, 2022.
Claims priority of application No. 2106831 (GB), filed on May 13, 2021.
Prior Publication US 2024/0229814 A1, Jul. 11, 2024
Int. Cl. F04D 29/08 (2006.01); F04D 17/06 (2006.01); F04D 29/16 (2006.01); F04D 29/28 (2006.01); F04D 29/44 (2006.01); F01D 11/02 (2006.01)
CPC F04D 29/083 (2013.01) [F04D 17/06 (2013.01); F04D 29/161 (2013.01); F04D 29/162 (2013.01); F04D 29/281 (2013.01); F04D 29/441 (2013.01); F01D 11/02 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A compressor for use in domestic appliances, the compressor comprising:
an impeller comprising an inlet, an outlet, a hub defining a rotational axis of the impeller, a plurality of impeller blades that extend from the hub and end in a blade tip, and a frustoconical shroud that at least partially surrounds the plurality of impeller blades, the shroud having an inner surface that connects to the blade tips;
a housing that at least partially surrounds the shroud and that is coaxially arranged with respect to the rotational axis of the impeller to allow the impeller to rotate within the housing;
a leakage flow path defined between the shroud and the housing leading from a leakage flow path inlet to a leakage flow path outlet;
a labyrinth seal arrangement provided in the leakage flow path; and
a flow straightening arrangement having an inlet at an outlet of the labyrinth seal arrangement, the flow straightening arrangement having a plurality of straightening vanes extending radially inward from the housing to a circumferential wall.