US 11,998,163 B2
Vacuum cleaner
Daniel James Brook, Bristol (GB); Steven Hunter, Swindon (GB); Andrew Peter Sinclair, Swindon (GB); and Stefan Keir, Swindon (GB)
Assigned to Dyson Technology Limited, Malmesbury (GB)
Appl. No. 17/440,215
Filed by Dyson Technology Limited, Wiltshire (GB)
PCT Filed Mar. 19, 2020, PCT No. PCT/GB2020/050732
§ 371(c)(1), (2) Date Sep. 17, 2021,
PCT Pub. No. WO2020/188286, PCT Pub. Date Sep. 24, 2020.
Claims priority of application No. 1903836 (GB), filed on Mar. 20, 2019.
Prior Publication US 2022/0142432 A1, May 12, 2022
Int. Cl. A47L 9/28 (2006.01); A47L 5/22 (2006.01); A47L 5/24 (2006.01); H02J 7/00 (2006.01)
CPC A47L 9/2884 (2013.01) [A47L 5/225 (2013.01); A47L 5/24 (2013.01); A47L 9/2842 (2013.01); A47L 9/2857 (2013.01); H02J 7/00306 (2020.01); H02J 7/0044 (2013.01); H02J 7/0047 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A vacuum cleaner comprising:
a vacuum motor configured to draw air through the vacuum cleaner;
a battery configured to supply electricity to the vacuum motor; and
a control system configured to control the supply of electricity from the battery to the vacuum motor,
wherein:
the control system is configured to switch the vacuum cleaner between a first power mode in which electricity is delivered from the battery to the vacuum motor at a first power level, and at least a second power mode in which electricity is delivered from the battery to the vacuum motor at a second power level which is lower than the first power level; and
the control system is configured to monitor the duration of operation of the vacuum cleaner in the different power modes, and to provide an alert if the duration of operation of the vacuum cleaner in the first power mode, as a percentage of a total time during which electricity has been delivered to the vacuum motor at any power level, exceeds a percentage threshold.