US 11,142,860 B2Granted

Washing machine and control method thereof

AssigneeSamsung Electronics Co., Ltd.

InventorsJung Chul Choi, Jun Hyun Park, Wan Hee Lee

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Abstract

There is proposed a washing machine and a control thereof capable of maximizing a mechanical force regardless of the amount and weight of laundry. By using a washing profile in which the cycle and size of a washing RPM are variable, a washing mechanical force can be maximized regardless of the amount of laundry or a change in the weight of the laundry due to moisture absorption of the laundry. In addition, the head drop behavior of the laundry can be diversified through the washing profile in which the cycle and size of the washing RPM are variable, and in this way, by allowing water (washing water) to be effectively infiltrated into the laundry, the washing performance can be improved. In addition, by continuously showing various washing operations (rubbing, tapping, centrifugal rotation, or the like), an effect of enhancing the visibility of washing can be obtained.

Claims19

Dependent claims

A control method of a washing machine including a tub configured to accommodate water, a drum rotatably installed inside the tub to accommodate laundry, and a motor configured to generate a driving force for rotating the drum, the control method comprising:

(a) in a state in which the motor is stopped, driving the motor and accelerating rotation of the motor so that a rotational speed of the motor reaches a first rotations-per-minute (RPM);
(b) in response to a first predetermined time passing, while a rotational direction of the motor is maintained, decelerating the rotation of the motor so that the rotational speed of the motor reaches a second RPM, wherein a difference between the first RPM and the second RPM is set differently according to a weight of the laundry;
(c) in response to the rotational speed of the motor reaching the second RPM, while the rotational direction of the motor is maintained, re-accelerating the rotation of the motor so that the rotational speed of the motor reaches a third RPM;
(d) stopping the motor during a motor-off time according to an operation rate;
(e) in response to a second predetermined time passing, driving the motor so that the motor rotates in a direction opposite to the rotational direction before the motor stops and accelerating rotation of the motor so that a rotational speed of the motor reaches the first RPM;
and
(f) performing (b) and (c),
wherein the second RPM is greater than 0.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/324,513Filed 3 Jul 2017
Priority: KR 10-2016-01008188 Aug 2016
Published: US 2019/0169779 A16 Jun 2019
Granted: 12 Oct 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification18 codes

D06F 35/005
Washing machines, apparatus, or methods not otherwise provided for: methods for washing, rinsing or spin-drying
D06F 23/02
Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing…:…
D06F 33/00
Control of operations performed in washing machines or washer-dryers
D06F 33/32
Control of washing machines characterised by the purpose or target of the control: control of operational steps, e.g. optimisation or improvement…