Clothing treatment device and method for controlling same

Patent metadata

Field	Value
Publication number	US-11220772-B2
Application number	US-201816611106-A
Country	US
Kind code	B2
Filing date	Jul 4, 2018
Priority date	Jul 4, 2017
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

A laundry treating apparatus includes a tub configured to hold wash water, a drum rotatably supported in the tub and including a shaft disposed perpendicular with the ground, and a sub-drum detachably mounted to an inner circumferential surface of the drum and configured to wash laundry independently from the drum. An information tag is disposed in the sub-drum, the tag containing information about the laundry. A reading unit is configured to acquire the information about the laundry from the information tag. A control unit is configured to determine a washing course to be performed in the sub-drum based on the information acquired by the reading unit.

First claim

What is claimed is:

1. A laundry treating apparatus comprising:
a tub configured to hold wash water;
a drum rotatably supported in the tub, the drum comprising a shaft disposed perpendicular with the ground;
a sub-drum detachably mounted to an inner circumferential surface of the drum and configured to wash laundry independently from the drum;
an information tag disposed in the sub-drum, the information tag including information about laundry to be washed in the sub-drum;
a reading unit configured to acquire the information about the laundry from the information tag; and
a control unit configured to determine a washing course to be performed in the sub-drum based on the information acquired by the reading unit,
wherein the control unit is configured to select the washing course from a plurality of predetermined washing courses, and
wherein the control unit is configured to determine whether the sub-drum is mounted to the drum based on whether the reading unit acquires information from the information tag.

2. The laundry treating apparatus according to claim 1 , wherein the control unit is configured to determine that the sub-drum is mounted to the drum when the reading unit acquires information about the laundry from the information tag.

3. The laundry treating apparatus according to claim 1 , wherein the information tag is one of a plurality of information tags corresponding to a plurality of washing courses.

4. The laundry treating apparatus according to claim 3 , wherein the plurality of information tags are each configured to be detachably mounted in the sub-drum, and
each of the plurality of information tags is configured to specify a corresponding washing course when each respective information tag is attached to the sub-drum.

5. The laundry treating apparatus according to claim 3 , wherein the sub-drum is one of a plurality of sub-drums and each of the plurality of information tags is disposed in a respective one of the plurality of sub-drums.

6. The laundry treating apparatus according to claim 1 , wherein the information tag comprises a RFID (Radio Frequency Identification) tag, and
the reading unit is configured to receive information from the RFID tag.

7. The laundry treating apparatus according to claim 1 , wherein the information tag comprises a magnet tag having one or more magnets, and
the reading unit comprises a hall sensor configured to sense the one or more magnets of the magnet tag.

8. The laundry treating apparatus according to claim 7 , wherein the magnet tag comprises a plurality of magnets arranged along a circumferential surface of the sub-drum, and
the hall sensor is disposed in an upper end of the tub.

9. The laundry treating apparatus according to claim 8 , wherein the reading unit further comprises a rotation angle sensing unit disposed in a lower end of the tub and configured to sense a rotation angle of the drum.

10. The laundry treating apparatus according to claim 8 , wherein the control unit is configured to determine a washing course by acquiring a frequency sensed by the hall sensor while the drum is rotated to a preset angle.

11. The laundry treating apparatus according to claim 8 , wherein the magnet tag comprises a plurality of combinations of a number of the magnets and positions of the magnets, and
the control unit is configured to determine a washing course by acquiring a sensing frequency of the hall sensor and a rotation angle of the drum measured between sensing points of the hall sensor.

12. A laundry treating apparatus comprising:
a tub configured to hold wash water;
a drum rotatably supported in the tub, the drum comprising a shaft disposed perpendicular with the ground;
a sub-drum detachably mounted to an inner circumferential surface of the drum and configured to wash laundry independently from the drum;
a control panel configured to enable selection of a first washing course to be performed by the drum;
an information tag disposed in the sub-drum, the information tag being configured to enable selection of a second washing course to be performed in the sub-drum;
a reading unit configured to acquire information about the second washing course to be performed in the sub-drum from the information tag; and
a control unit configured to perform washing according to the first washing course selected via the control panel and the second washing course selected via the information tag,
wherein the information tag is one of a plurality of information tags corresponding to a plurality of washing courses, the sub-drum is one of a plurality of sub-drums, and
each of the plurality of information tags is attached to a respective one of the plurality of sub-drums.

13. The laundry treating apparatus according to claim 12 , wherein the information tag comprises a magnet tag having one or more magnets arranged along a surface of the sub-drum, the information tag corresponding to a plurality of washing courses, wherein each of the washing courses corresponds to a combination of one or more of a number of the one or more magnets, and positions of the one or more magnets.

14. The laundry treating apparatus according to claim 12 , wherein the information tag comprises a RFID tag, and
the reading unit is configured to receive information from the RFID tag.

15. The laundry treating apparatus according to claim 12 , wherein the control unit is configured to:
acquire information about the first washing course to be performed by the drum via the control panel,
determine that the sub-drum is not mounted to the drum when the reading unit does not acquire information about the second washing course to be performed in the sub-drum, and
perform washing according to only the first washing course for the drum when it is determined that the sub-drum is not mounted to the drum.

16. The laundry treating apparatus according to claim 12 , wherein the control unit is configured to:
control the reading unit to acquire information about the second washing course for the sub-drum, and
perform the washing according to only the second washing course for the sub-drum when the control unit determines that the reading unit does not acquire information about the first washing course.

Assignees

• Lg Electronics Inc

Inventors

• Kim Keunjoo

Classifications

• H02K11/215

  Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements · CPC title

• D06F33/36 Primary

  of washing · CPC title

• D06F34/05

  for wireless communication between components, e.g. for remote monitoring or control · CPC title

• D06F34/20

  Parameters relating to constructional components, e.g. door sensors · CPC title

• D06F37/12

  adapted for rotation or oscillation about a vertical axis · CPC title