Patent ID: 11859639
Assignee: LG ELECTRONICS INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 10:
11. A fan motor comprising:
a motor configured to rotate a rotary shaft;
an impeller including a hub connected to the rotary shaft and at least one blade disposed at an outer surface of the hub;
a shroud that surrounds an outer circumference of the impeller; and
a coating layer provided at an inner circumferential surface of the shroud,
wherein the coating layer includes:
a polymer, a hardness of the polymer being less than a hardness of the at least one blade, and
a plurality of beads mixed with the polymer, a hardness of the plurality of beads being greater than the hardness of the polymer,

wherein the coating layer includes:
a first area having a first thickness, and
a second area that faces the impeller in a radial direction of the impeller, at least a portion of the second area having a second thickness less than the first thickness, and

wherein the second thickness varies along an inner circumferential direction of the shroud, and
wherein a number of beads per unit area of the second area is less than a number of beads per unit area of the first area.