US 11,963,654 B2
Cleaner
Bohyun Nam, Seoul (KR); Namhee Kim, Seoul (KR); Jinju Kim, Seoul (KR); Hyeonjeong An, Seoul (KR); Jungbae Hwang, Seoul (KR); Philjae Hwang, Seoul (KR); Mantae Hwang, Seoul (KR); Eunji Sung, Seoul (KR); and Taekgi Lee, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Jan. 30, 2020, as Appl. No. 16/777,563.
Application 16/777,563 is a continuation of application No. 15/475,533, filed on Mar. 31, 2017, granted, now 10,617,269.
Claims priority of application No. 10-2016-0039814 (KR), filed on Mar. 31, 2016; application No. 10-2016-0059472 (KR), filed on May 16, 2016; application No. 10-2016-0070220 (KR), filed on Jun. 7, 2016; and application No. 10-2016-0108313 (KR), filed on Aug. 25, 2016.
Prior Publication US 2020/0163512 A1, May 28, 2020
Int. Cl. A47L 9/16 (2006.01); A47L 5/22 (2006.01); A47L 5/24 (2006.01); A47L 9/10 (2006.01); A47L 9/12 (2006.01); A47L 9/22 (2006.01); A47L 9/28 (2006.01); A47L 9/32 (2006.01)
CPC A47L 9/1675 (2013.01) [A47L 5/22 (2013.01); A47L 5/24 (2013.01); A47L 9/106 (2013.01); A47L 9/12 (2013.01); A47L 9/16 (2013.01); A47L 9/1625 (2013.01); A47L 9/1633 (2013.01); A47L 9/1641 (2013.01); A47L 9/1683 (2013.01); A47L 9/22 (2013.01); A47L 9/28 (2013.01); A47L 9/2842 (2013.01); A47L 9/2857 (2013.01); A47L 9/2873 (2013.01); A47L 9/2884 (2013.01); A47L 9/32 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A cleaner comprising:
a suction unit configured to guide air into the cleaner;
a suction motor configured to drive a rotation of a rotary impeller via an impeller shaft to generate a suction force that suctions air into the cleaner through the suction unit;
a dust separation unit comprising:
a first cyclone unit configured to separate dust from air that is suctioned into the cleaner through the suction unit, and
a second cyclone unit configured to receive air that is discharged from the first cyclone unit, the second cyclone unit comprising a plurality of cyclone bodies that are configured to separate dust from the air that is discharged from the first cyclone unit;
a pre-filter that circumferentially surrounds an extension line of the impeller shaft and is configured to filter air discharged from the second cyclone unit toward the suction motor;
a filter that circumferentially surrounds the extension line of the impeller shaft and is configured to filter air that has flown through the rotary impeller; and
a flow guide that is disposed between the filter and the pre-filter, wherein the flow guide includes:
a first side that is oriented toward the suction motor and at least partially defines an intake passage that (i) circumferentially surrounds at least a part of the pre-filter and (ii) is configured to allow the air discharged from the second cyclone unit to flow radially inward toward the pre-filter and flow through the pre-filter, and
a second side that is oriented away from the suction motor and is opposite to the first side, the second side at least partially defining an exhaust passage configured to guide air that is discharged from the rotary impeller toward an outside of the cleaner.