US 12,006,618 B2
Laundry treatment appliance with dry estimate of the amount of laundry load
Daniele Beninato, Charlotte, NC (US); Andrea Mazzon, Porcia (IT); Martino Bondi, Porcia (IT); Andrea Zattin, Porcia (IT); and Elisa Stabon, Porcia (IT)
Assigned to Electrolux Appliances Aktiebolag, Stockholm (SE)
Appl. No. 17/439,478
Filed by Electrolux Appliances Aktiebolag, Stockholm (SE)
PCT Filed Mar. 11, 2020, PCT No. PCT/EP2020/056526
§ 371(c)(1), (2) Date Sep. 15, 2021,
PCT Pub. No. WO2020/193139, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 19165528 (EP), filed on Mar. 27, 2019.
Prior Publication US 2022/0154382 A1, May 19, 2022
Int. Cl. D06F 34/18 (2020.01); D06F 33/37 (2020.01); D06F 33/48 (2020.01); D06F 39/02 (2006.01)
CPC D06F 34/18 (2020.02) [D06F 33/37 (2020.02); D06F 33/48 (2020.02); D06F 39/022 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A laundry treatment appliance comprising:
a rotatable drum configured to house a laundry load to be treated;
an electric motor configured to rotate the rotatable drum;
at least one compartment configured to contain multiple doses of a treatment agent for laundry treatment, and
a control unit configured to:
(i) before any delivery of water to the laundry load during a selected laundry treatment cycle:
control the electric motor to rotate the rotatable drum with a predefined speed profile comprising a ramp speed profile portion in which the rotatable drum is accelerated from a first rotational speed to a second rotational speed higher than the first rotational speed, and a constant speed profile portion in which the rotatable drum is constantly rotated at the second rotational speed;
determine an estimate of the amount of laundry load according to one or more parameters of the electric motor being acquired during rotation of the rotatable drum with the predefined speed profile;
according to the estimate of the amount of laundry load, determine a treatment agent dose to be used during the selected laundry treatment cycle, and
(ii) after having determined the treatment agent dose to be used during the selected laundry treatment cycle:
deliver water to the laundry load, and
deliver the determined treatment agent dose to the laundry load,
wherein the control unit is further configured to:
upon determining the estimate of the amount of laundry load is above a threshold amount of laundry load, determine a further estimate of the amount of laundry load based on water absorption by the laundry load and determine at least one parameter of the selected laundry treatment cycle based on the further estimate of the amount of laundry load; and
upon determining the estimate of the amount of laundry load is below the threshold amount of laundry load, determine the at least one parameter of the selected laundry treatment cycle based on the estimate of the amount of laundry load.