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

Claim 0:
1. 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 has areas having different thicknesses formed by grinding of the at least one blade,
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 areas of the coating layer include:
a first area having a first thickness; and
a second area having a second thickness less than the first thickness and toward the impeller, 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.