US 12,318,056 B2
Cleaner
Bohyun Nam, Seoul (KR); Namhee Kim, Seoul (KR); Jinju Kim, Seoul (KR); Hyeonjeong An, Seoul (KR); and Jungbae Hwang, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Sep. 25, 2020, as Appl. No. 17/033,268.
Application 17/033,268 is a continuation of application No. 16/723,785, filed on Dec. 20, 2019, granted, now 10,980,380.
Application 16/723,785 is a continuation of application No. 15/475,476, filed on Mar. 31, 2017, granted, now 10,575,689, issued on Mar. 3, 2020.
Claims priority of application No. 10-2016-0039814 (KR), filed on Mar. 31, 2016; and application No. 10-2016-0070220 (KR), filed on Jun. 7, 2016.
Prior Publication US 2021/0007564 A1, Jan. 14, 2021
Int. Cl. A47L 5/28 (2006.01); A47L 5/24 (2006.01); A47L 9/00 (2006.01); A47L 9/12 (2006.01); A47L 9/14 (2006.01); A47L 9/16 (2006.01); A47L 9/22 (2006.01); A47L 9/28 (2006.01)
CPC A47L 5/28 (2013.01) [A47L 5/24 (2013.01); A47L 9/00 (2013.01); A47L 9/12 (2013.01); A47L 9/149 (2013.01); A47L 9/1608 (2013.01); A47L 9/1616 (2013.01); A47L 9/1625 (2013.01); A47L 9/1641 (2013.01); A47L 9/22 (2013.01); A47L 9/2842 (2013.01); A47L 9/2857 (2013.01); A47L 9/2884 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A cleaner comprising:
a suction unit configured to guide air into the cleaner;
a suction motor configured to generate suction force to thereby draw air into the cleaner through the suction unit;
an impeller configured to rotate about a rotary shaft extending in an axial direction of the suction motor;
a discharge cover that is disposed at an upper side of the impeller and defines an external appearance of the cleaner;
a dust separation unit comprising:
a first cyclone unit configured to separate dust from air that is guided into the cleaner through the suction unit, and
a second cyclone unit disposed below a lower end of the suction motor such that at least a portion of the second cyclone unit overlaps with the suction motor in the axial direction, the second cyclone unit comprising a plurality of cyclone bodies that are configured to separate dust from air that is discharged from the first cyclone unit; and
a pre-filter that surrounds an outer circumference of the suction motor and is disposed below the discharge cover, the pre-filter being configured to filter air that enters the suction motor,
wherein the discharge cover includes:
a circumferential wall that is radially spaced apart from an extension line of the rotary shaft above the pre-filter and extends in the axial direction to thereby surround the extension line of the rotary shaft,
an upper wall that is spaced apart from the impeller in the axial direction, wherein an upper space is defined by the circumferential wall and the upper wall and configured to allow a flow of air discharged from the second cyclone unit to pass through the suction motor and be exhausted to an outside of the discharge cover,
an exhaust filter disposed in the upper space and configured to filter air that has passed through the suction motor, the exhaust filter extending along the circumferential wall and being located radially further away from the extension line of the rotary shaft than the pre-filter, and
a receiving portion that extends inwardly from a lower end of the circumferential wall to the upper space and is positioned radially further away from the extension line of the rotary shaft than the pre-filter, the receiving portion supporting the exhaust filter, and
wherein the upper space is configured to allow the flow of air to be filtered by the pre-filter and the exhaust filter before being exhausted to the outside of the discharge cover.