US 11,717,782 B2
Mixed flow fan module and portable air purifier with mixed flow fan module
Si Young Oh, Seoul (KR); Juhyun Kim, Seoul (KR); Kidong Kim, Seoul (KR); and Seok-Ho Choi, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on Jul. 26, 2021, as Appl. No. 17/384,893.
Claims priority of application No. 10-2020-0093403 (KR), filed on Jul. 27, 2020; and application No. 10-2020-0174530 (KR), filed on Dec. 14, 2020.
Prior Publication US 2022/0023788 A1, Jan. 27, 2022
Int. Cl. B01D 46/00 (2022.01); F04D 19/00 (2006.01); F04D 29/52 (2006.01); F04D 17/06 (2006.01); F04D 29/46 (2006.01)
CPC B01D 46/0047 (2013.01) [B01D 46/0002 (2013.01); F04D 17/06 (2013.01); F04D 19/002 (2013.01); F04D 29/462 (2013.01); F04D 29/522 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A mixed flow fan module, comprising:
a fan housing having an outer surface that is curved along a circumferential direction and defining an operation space;
a fan rotatably disposed inside of the fan housing; and
a fan base coupled to the fan housing and configured to guide air in a direction toward the fan, wherein the fan housing, the fan, and the fan base are coupled together to form a module, wherein the fan comprises:
a hub configured to be disposed at a center of the fan housing and rotated by receiving external power;
a plurality of fan blades each having a first end connected to the hub and spaced apart from one another by an equal distance along an outer circumferential surface of the hub; and
a shroud connected to a second end of each of the plurality of fan blades, having an annular shape, and spaced apart from the fan base, and wherein the hub comprises:
a hub plate rotatably disposed inside of the fan housing and located at a radial central portion of the fan housing;
a shaft coupler disposed at a center of the hub plate, that protrudes either upward or downward from the hub plate, and is connected to a shaft to receive a rotational power;
an inner protrusion defined along an outer edge of the hub plate, having a circular arc shape, and that extends upward; and
a skirt that extends obliquely upward from an outside of the inner protrusion.