公开(公告)号：US20230135382A1

公开(公告)日：2023-05-04

申请号：US17869434

申请日：2022-07-20

Applicant: LG ELECTRONICS INC.

Inventor： Younggyu JUNG ,  Hakkyu CHOI

IPC: F25D17/08 ,  F04D29/28

Abstract: A ventilation device includes a fan including a hub coupled to a rotating shaft, a plurality of blades disposed at the hub and disposed radially with respect to the rotating shaft, and a shroud connecting the plurality of blades. The ventilation device further includes a scroll guide configured to guide a cold air discharged from the fan in both directions, and first and second ducts extending from the scroll guide and extending along a rotation direction of the fan. In the first and second ducts, a length of a hub-side surface is greater than a length of a shroud-side surface.

公开(公告)号：US20230120338A1

公开(公告)日：2023-04-20

申请号：US17909960

申请日：2021-03-11

Applicant: LG ELECTRONICS INC.

Inventor： Hakkyu CHOI ,  Seungjo BAEK ,  Jeongho LEE

IPC: F04D29/28 ,  F04D29/30

Abstract: The present invention relates to an impeller comprising: a shroud having a plurality of spiral upper slot units formed therein; a hub located to face the shroud; and a plurality of blades connected to the hub and inserted into the upper slot units to be coupled to the shroud, wherein the blade includes a body portion formed to be inclined to one side and an upper end portion, which is bent upward from the body portion and has a second concave surface formed in one side and a second convex surface formed on the other side thereof, and the upper slot unit includes an upper slot bottom for forming a space in which the upper end portion is inserted; an upper slot wall divided into a first upper slot wall located at the second concave surface side and a second upper slot wall located at the second convex surface side; and a second inclined surface formed to be inclined from the first upper slot wall so as to face the second concave surface. Thus, the impeller secures the assembling of the blades and has the effect of reducing the possibility of separation of the blades during the high-speed rotation of the impeller, which improves the structural rigidity of the impeller.