US 11,971,048 B2
Impeller
Hakkyu Choi, Seoul (KR); Seungjo Baek, Seoul (KR); and Jeongho Lee, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/909,960
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Mar. 11, 2021, PCT No. PCT/KR2021/003010
§ 371(c)(1), (2) Date Sep. 7, 2022,
PCT Pub. No. WO2021/182883, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. 10-2020-0030874 (KR), filed on Mar. 12, 2020.
Prior Publication US 2023/0120338 A1, Apr. 20, 2023
Int. Cl. F04D 29/28 (2006.01); F04D 29/30 (2006.01); F04D 29/02 (2006.01); F04D 29/44 (2006.01); F04D 29/62 (2006.01)
CPC F04D 29/284 (2013.01) [F04D 29/30 (2013.01); F04D 29/023 (2013.01); F04D 29/281 (2013.01); F04D 29/441 (2013.01); F04D 29/626 (2013.01); F05D 2210/12 (2013.01); F05D 2300/173 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An impeller, comprising:
a shroud provided with a plurality of upper slots of a spiral shape;
a hub disposed opposite the shroud; and
a plurality of blades connected to the hub and inserted into the respective plurality of upper slots to be coupled to the shroud, the plurality of blades each having a first side, and a second side formed on an opposite side of the first side, wherein the hub is provided with a plurality of lower slots of a spiral shape, wherein the plurality of blades each further comprises:
a body formed to be inclined with respect to an axial direction of the impeller;
a lower edge bent in the axial direction toward the hub from the body to define a first concave surface on the first side thereof and a first convex surface on the second side thereof, the lower edge being inserted into one of the plurality of lower slots to be coupled to the hub; and
an upper edge bent from the body in the axial direction toward the shroud to define a second concave surface on the second side thereof and a second convex surface on the first side thereof, and wherein the plurality of upper slots each comprises:
an upper slot bottom defining a space into which the upper edge is inserted;
an upper slot wall divided into a first upper slot wall disposed on a second concave surface side and a second upper slot wall disposed on a second convex surface side; and
a second inclined surface inclined from the first upper slot wall to face the second concave surface.