US 12,110,897 B2
Fan motor
Jeong Ho Lee, Seoul (KR); Seong-Jae Kim, Seoul (KR); Seung Jo Baek, Seoul (KR); Young Gyu Jung, Seoul (KR); Hak Kyu Choi, Seoul (KR); and Seong-Ho Cho, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG ELECTRONICS INC., Seoul (KR)
Filed on May 17, 2023, as Appl. No. 18/198,670.
Application 18/198,670 is a continuation of application No. 17/355,516, filed on Jun. 23, 2021, granted, now 11,686,314.
Application 17/355,516 is a continuation of application No. 15/923,575, filed on Mar. 16, 2018, granted, now 11,085,454, issued on Aug. 10, 2021.
Claims priority of application No. 10-2017-0033282 (KR), filed on Mar. 16, 2017; and application No. 10-2017-0083898 (KR), filed on Jun. 30, 2017.
Prior Publication US 2023/0287892 A1, Sep. 14, 2023
Int. Cl. F04D 25/08 (2006.01); A47L 5/22 (2006.01); A47L 9/22 (2006.01); F04D 29/26 (2006.01); F04D 29/40 (2006.01); F04D 29/44 (2006.01); F04D 29/58 (2006.01); F04D 29/62 (2006.01)
CPC F04D 25/082 (2013.01) [A47L 5/22 (2013.01); A47L 9/22 (2013.01); F04D 29/403 (2013.01); F04D 29/444 (2013.01); F04D 29/5806 (2013.01); F04D 29/624 (2013.01); F04D 29/26 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A fan motor for a vacuum cleaner, comprising:
a motor mount;
a motor disposed at the motor mount, the motor comprising a stator, a shaft extending through the stator, a rotor disposed at the shaft, and a pair of bearings that support the shaft and are spaced apart from each other along a longitudinal direction of the shaft;
a first bearing support that supports a first bearing of the pair of bearings and is disposed at a bottom portion of the motor mount;
a bearing housing coupled to an upper side of the motor mount, the bearing housing comprising a second bearing support that supports a second bearing of the pair of bearings;
an impeller located vertically above the motor and configured to be rotated by the motor to generate a first airflow;
a diffuser located between the impeller and the bearing housing, the diffuser having (i) a diffuser body that has a cylindrical shape and (ii) a vane located at an outer surface of the diffuser body, the diffuser being disposed adjacent to the impeller and extending downward away from the impeller,
an impeller cover that is disposed vertically above the impeller and covers the impeller and the diffuser, the impeller cover defining an air inlet at an upper central portion of the impeller cover; and
an air discharge opening defined at a lower end of the diffuser and exposed to an outside space of the motor mount, the air discharge opening being configured to discharge, to the outside space of the motor mount, the first airflow suctioned through the air inlet and passed through the impeller,
wherein the motor is configured to receive, from below the air discharge opening, air from the outside space of the motor mount to thereby cool the motor, the received air forming a second airflow that flows through the stator of the motor, and
wherein the diffuser is configured to discharge the second airflow from an inner space of the motor mount toward a low pressure region formed outside the inner space of the motor mount.