US 12,405,017 B2
Portable air purifier
Juhyun Kim, Seoul (KR); Seok-Ho Choi, Seoul (KR); Si Young Oh, Seoul (KR); and Sang Hyuk Son, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/792,935
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Apr. 23, 2020, PCT No. PCT/KR2020/005390
§ 371(c)(1), (2) Date Jul. 14, 2022,
PCT Pub. No. WO2021/157779, PCT Pub. Date Aug. 12, 2021.
Claims priority of application No. 10-2020-0013181 (KR), filed on Feb. 4, 2020.
Prior Publication US 2023/0066531 A1, Mar. 2, 2023
Int. Cl. F24F 8/80 (2021.01); F04D 17/06 (2006.01); F04D 25/16 (2006.01); F04D 29/60 (2006.01); F04D 29/70 (2006.01); F24F 3/16 (2021.01); F24F 13/20 (2006.01); F24F 13/28 (2006.01)
CPC F24F 8/80 (2021.01) [F04D 17/06 (2013.01); F04D 25/166 (2013.01); F04D 29/602 (2013.01); F04D 29/703 (2013.01); F24F 3/16 (2013.01); F24F 13/20 (2013.01); F24F 13/28 (2013.01); F05D 2250/51 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A portable air purifier, comprising:
a case having a suction surface on a first side thereof in an axial direction and having a discharge surface on a second side thereof in the axial direction;
a filter disposed between the suction surface and the discharge surface;
a fan module disposed between the discharge surface and the filter that suctions air, having passed through the filter, and discharges the air to the discharge surface; and
a fan base that is disposed between the filter and the fan module, coupled to the fan module, and forms a passage that connects the filter and the fan module, wherein the fan base comprises:
a base plate disposed between the filter and the fan module; and
a fan inlet that is formed at the base plate, penetrates the base plate, and forms a passage that connects the filter and the fan module, wherein the fan base further comprises a bell mouth that protrudes from the base plate in the axial direction, wherein the fan inlet is formed at an inside of the bell mouth and penetrates in a radial direction of the bell mouth, wherein the fan module comprises a fan rotatably disposed between the bell mouth and the discharge surface, wherein the bell mouth has a first surface that faces the filter module and is convex toward the filter module and a second surface that faces the fan module and is depressed, while protruding from an inner circumferential surface of the base plate in the axial direction, wherein at least a portion of the fan is inserted into a space surrounded by the second surface, wherein the fan comprises a hub rotatably provided, a shroud spaced a predetermined distance apart from the hub and disposed outside of the hub in a radial direction of the hub, and a fan blade that protrudes from the hub in a centrifugal direction and connects the hub and the shroud, and wherein at least a portion of the shroud is inserted into the space surrounded by the second surface.