Patent ID: 11959488
Assignee: LG ELECTRONICS INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 8:
9. A blower, comprising:
a lower case in which at least one suction hole through which air flows inside is formed;
an upper case that is disposed in the lower case and in which at least one discharge hole through which air is discharged is formed; and
a fan that is disposed in the lower case and comprising a plurality of blades that rotates about a vertical rotational axis, wherein each of the plurality of blades includes:
a leading edge defined as a front end with respect to a rotational direction;
a trailing edge facing the leading edge, and defined as a rear end with respect to the rotational direction;
a pressure surface that connects the leading edge and the trailing edge, and defined as an upstream surface with respect to an airflow direction;
a negative pressure surface that connects the leading edge and the trailing edge, and defined as a downstream surface with respect to the airflow direction; and
at least one notch recessed toward the pressure surface from the leading edge and the negative pressure surface, and wherein the at least one notch includes:
a bottom line formed as a deepest recessed portion of the at least one notch, having a line shape, and extending in a circumferential direction about the vertical rotational axis;
a first inclined surface that extends obliquely from a first side of the bottom line so as to connect the bottom line with the leading edge and the negative pressure surface; and

a second inclined surface facing the first inclined surface, extending obliquely from a second side of the bottom line so as to connect the bottom line with the leading edge and the negative pressure surface, wherein the first inclined surface and the second inclined surface are connected by the bottom line.