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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10907287 B1

PDFFull Text
Date of Patent:
Feb. 02, 2021

Filed:

Sep. 28, 2017

Washing machine and method of controlling the same

Applicant:

Lg Electronics Inc., Seoul, KR;

Inventors:

Hoonbong Lee, Seoul, KR;

Minho Jang, Seoul, KR;

Jaegwang Bae, Seoul, KR;

Assignee:

LG ELECTRONICS INC., Seoul, KR;

Attorney:

KED & Associates, LLP

Primary Examiner:

Spencer E Bell

Int. Cl.
CPC ...
D06F 33/00 (2020.01); D06F 34/18 (2020.01); D06F 23/02 (2006.01); D06F 37/22 (2006.01); D06F 37/30 (2020.01); D06F 34/28 (2020.01); D06F 37/06 (2006.01); D06F 37/26 (2006.01); D06F 37/38 (2006.01); D06F 39/00 (2020.01); D06F 39/02 (2006.01); D06F 39/04 (2006.01); D06F 39/08 (2006.01); D06F 39/14 (2006.01);
U.S. Cl.
CPC ...
D06F 33/00 (2013.01); D06F 23/02 (2013.01); D06F 34/18 (2020.02); D06F 34/28 (2020.02); D06F 37/06 (2013.01); D06F 37/22 (2013.01); D06F 37/266 (2013.01); D06F 37/304 (2013.01); D06F 37/38 (2013.01); D06F 39/008 (2013.01); D06F 39/02 (2013.01); D06F 39/045 (2013.01); D06F 39/085 (2013.01); D06F 39/087 (2013.01); D06F 39/088 (2013.01); D06F 39/14 (2013.01); D06F 2202/04 (2013.01); D06F 2202/065 (2013.01); D06F 2202/085 (2013.01); D06F 2202/10 (2013.01); D06F 2202/12 (2013.01); D06F 2204/065 (2013.01); D06F 2204/088 (2013.01); D06F 2222/00 (2013.01);
Abstract

An amount of laundry that is introduced into a washing machine is calculated using gravity and inertia applied during the operation of a motor, whereby the amount of laundry is precisely measured and effects of the initial position of the laundry and the movement of the laundry are minimized. In addition, a measured current of the operated motor is used to determine the amount of laundry without a sensor. Furthermore, the rotational speed of the motor is controlled stepwise from a low speed to eliminate variation due to vibration. Moreover, the characteristics of gravity in the low-speed maintenance period are used to effectively calculate the amount of laundry, and the characteristics of inertia in the acceleration period are also used, whereby it is possible to precisely determine the amount of laundry. Consequently, it is easy to commence the spin-drying operation, thereby reducing washing time and saving energy.

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