US 12,385,499 B2
Blower
Jinwook Choi, Seoul (KR); Jaehyuk Jung, Seoul (KR); Juhyun Kim, Seoul (KR); and Seokho Choi, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Sep. 27, 2023, as Appl. No. 18/373,562.
Claims priority of application No. 10-2022-0146104 (KR), filed on Nov. 4, 2022.
Prior Publication US 2024/0151244 A1, May 9, 2024
Int. Cl. F04D 29/44 (2006.01); F04D 17/00 (2006.01)
CPC F04D 29/444 (2013.01) [F04D 17/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A blower, comprising:
a case having a suction port and discharge ports;
a fan disposed inside of the case; and
a diffuser that is disposed downstream of the fan and guides air, discharged from the fan, toward the discharge ports, wherein the diffuser comprises:
an outer wall having a circumference;
an inner wall spaced apart inwardly from the outer wall so that an air passage, through which the air discharged from the fan flows, is formed therebetween; and
a plurality of vanes that extends radially between the outer wall and the inner wall and divides the air passage into a plurality of unit passages, wherein the outer wall and the inner wall are formed to have areas with different radial separation distances D-between the outer wall and the inner wall, wherein the air passage comprises a normal area in which the separation distance is a predetermined value, and an extended area in which the separation distance is greater than the predetermined value, wherein a plurality of recessed portions, which is recessed radially inward, is formed in the inner wall of the extended area, and wherein the plurality of recessed portions is spaced apart from each other along a circumferential direction of the inner wall.