Patent ID: 11971048
Assignee: LG ELECTRONICS INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
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.