US 12,448,715 B2 · Washing machine and controlling method for the same

Abstract

A washing machine for controlling optimal operating revolutions per minute (rpm) of a drain pump in a draining course and a dehydrating course includes a washing tub; a drain pump configured to drain water in the washing tub; a pump motor configured to operate the drain pump; an inverter circuit configured to supply a driving current to the pump motor to operate the drain pump; and a controller configured to control the inverter circuit to supply reference power to the pump motor in response to starting a draining course, determine reference revolutions per minute (rpm) based on average rpm of the pump motor during a preset period of time, and control the inverter circuit to operate the pump motor at the reference rpm in response to the determining of the reference rpm.

Claims20

Dependent claims

A washing machine comprising:

a washing tub;
a drain pump configured to drain water in the washing tub;
a pump motor configured to operate the drain pump;
an inverter circuit configured to supply a driving current to the pump motor to operate the drain pump;
and
a controller configured to:
control the inverter circuit to supply pre-set reference power to the pump motor based on a start of a draining course;
determine reference revolutions per minute (rpm) based on an average value of an operating rpm of the pump motor during a preset period of time in which the pre-set reference power is supplied to the pump motor;
and
in response to the determining of the reference rpm, control the inverter circuit to operate the pump motor at the determined reference rpm.

7 more elements

A method of controlling a washing machine comprising a washing tub, a drain pump configured to drain water in the washing tub, a pump motor configured to operate the drain pump, an inverter circuit configured to supply a driving current to the pump motor to operate the drain pump, and a controller, the method comprising:

controlling an inverter circuit to supply a pre-set reference power to a pump motor which operates a drain pump based on a start of a draining course;
determining reference revolutions per minute (rpm) based on an average value of an operating rpm of the pump motor during a preset period of time which the pre-set reference power is supplied;
and
in response to the determining of the reference rpm, controlling the inverter circuit to operate the pump motor at the determined reference rpm.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/955,762Filed 29 Sep 2022 · continuation

Priority

7 Sep 2022

Published

US 2023/0175187 A18 Jun 2023

Granted

21 Oct 2025

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 codes

D06F 34/08
Details of control systems for washing machines, washer-dryers or laundry dryers: control circuits or arrangements thereof
D06F 33/42
Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry: of draining
D06F 33/47
Control of washing machines characterised by the purpose or target of the control: responding to irregular working conditions, e.g. malfunctioning…
D06F 33/48
Control of washing machines characterised by the purpose or target of the control: preventing or reducing imbalance or noise

Washing machine and controlling method for the same

Life of this patent

Washing machine and controlling method for the same

Life of this patent

Abstract

Claims20