US 12,465,189 B2
Dishwasher
Jin Tae Kim, Seoul (KR); Jae Chul Lee, Seoul (KR); Seokhyun Kim, Seoul (KR); and Jukwang Hwang, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Appl. No. 18/269,523
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Dec. 9, 2021, PCT No. PCT/KR2021/018626
§ 371(c)(1), (2) Date Jun. 23, 2023,
PCT Pub. No. WO2022/139268, PCT Pub. Date Jun. 30, 2022.
Claims priority of application No. 10-2020-0182041 (KR), filed on Dec. 23, 2020.
Prior Publication US 2024/0057842 A1, Feb. 22, 2024
Int. Cl. A47L 15/00 (2006.01); A47L 15/42 (2006.01); A47L 15/44 (2006.01); A47L 15/50 (2006.01)
CPC A47L 15/0028 (2013.01) [A47L 15/0049 (2013.01); A47L 15/4219 (2013.01); A47L 15/4257 (2013.01); A47L 15/428 (2013.01); A47L 15/44 (2013.01); A47L 15/504 (2013.01); A47L 2401/34 (2013.01); A47L 2501/01 (2013.01); A47L 2501/26 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A dishwasher, comprising:
a tub having a wash space that is configured to receive therein a wash target;
a sump disposed at a lower end of the tub and configured to receive wash water;
a wash pump configured to supply the wash water from the sump to a nozzle;
a rack disposed in the wash space and configured to accommodate the wash target;
the nozzle that (i) is disposed at a lower end of the rack, (ii) is configured to be rotated by a force of the wash water supplied from the wash pump, (iii) is configured to spray the wash water to the wash target, and (iv) has a magnetic object coupled to one end of the nozzle, wherein a first pole and a second pole of the magnetic object are oriented circumferentially with respect to a rotation axis of the nozzle;
a sensing module comprising a Hall sensor that is configured to sense a magnetic force generated by a rotation of the magnetic object with the nozzle; and
a controller configured to:
receive sensing results from the sensing module,
determine, based on the sensing results, one or more of a rotation direction of the nozzle, a rotation speed of the nozzle, or whether the nozzle is rotating,
based on the determination, output an abnormality notification to a user or control wash water supplied to the nozzle through the wash pump,
determine, based on (i) a magnetic force generated by the magnetic object being not sensed through the sensing module and (ii) then a magnetic force generated by the first pole of the magnetic object being first sensed, that the rotation direction of the nozzle is a first direction, and
determine, based on (i) a magnetic force generated by the magnetic object being not sensed through the sensing module and (ii) then a magnetic force generated by the second pole of the magnetic object being first sensed, that the rotation direction of the nozzle is a second direction.