Laundry treating apparatus having induction heater and control method thereof

Patent metadata

Field	Value
Publication number	US-11840794-B2
Application number	US-202217944743-A
Country	US
Kind code	B2
Filing date	Sep 14, 2022
Priority date	Dec 13, 2018
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

Disclosed are an object treating apparatus, and more particularly, an object treating apparatus for heating a drum using an induction heater and a control method thereof. The object treating apparatus includes a tub; a drum rotatably disposed within the tub and accommodating an object therein; an induction heater disposed on the tub and configured to heat an outer circumferential face of the drum contacting the heater; a motor to rotate the drum; and a processor configured to control an operation of the induction heater to dry the object, wherein the processor is configured to: control revolution per minute (RPM) of the drum to perform at least two drum motions having at least two different target RPMs respectively when drying the object.

First claim

What is claimed is:

1. An object treating apparatus comprising:
a drum rotatably disposed and configured to accommodate an object therein;
an induction heater configured to heat a circumferential surface of the drum;
a motor configured to rotate the drum; and
a processor configured to control the drum to perform a drum motion cycle during drying of the object,
wherein the drum motion cycle comprises:
a conductive accelerating motion having a first target rotation speed of the drum in which the object is adhered to an inner circumferential surface of the drum to receive heat from the drum, and
a rearrangement motion having a second target rotation speed of the drum in which the object tumbles in the drum to block excessive drying at a first side of the object and insufficient drying at a second side of the object different from the first side.

2. The apparatus of claim 1 , wherein the first target rotation speed is 80 Revolutions Per Minute (RPM).

3. The apparatus of claim 1 , wherein the second target rotation speed is in a range of 60 RPM to 70 RPM.

4. The apparatus of claim 1 , wherein the conductive accelerating motion has a first stage and a subsequent second stage, wherein the first stage of the conductive accelerating motion has a third target rotation speed lower than the first target rotation speed, and the second stage of the conductive accelerating motion has the first target rotation speed.

5. The apparatus of claim 4 , wherein the third target rotation speed is 60 RPM.

6. The apparatus of claim 1 , wherein the rearrangement motion has a first stage and a subsequent second stage, wherein the first stage of the rearrangement motion has a fourth target rotation speed lower than the second target rotation speed, and the second stage of the rearrangement motion has the second target rotation speed.

7. The apparatus of claim 6 , wherein the fourth target rotation speed is in a range of 25 RPM to 35 RPM.

8. The apparatus of claim 7 , wherein the second target rotation speed is equal to a maximum rotation speed of a tumbling motion in which the object tumbles in the drum.

9. The apparatus of claim 1 , wherein the drum motion cycle comprises one conductive accelerating motion and two rearrangement motions.

10. The apparatus of claim 9 , wherein an operation time of the one conductive acceleration motion is longer than an operation time of the two rearrangement motions.

11. The apparatus of claim 10 , wherein the operation time of the one conductive acceleration motion is 60 seconds and the operation time of the rearrangement motion is 20 seconds.

12. The apparatus of claim 1 , wherein the drum motion cycle further comprises:
a plurality of conductive accelerating motions and
at least one gravity-based drop motion provided in between each of the plurality of the conductive acceleration motions.

13. The apparatus of claim 12 , wherein the drum motion cycle further comprises a plurality of rearrangement motions,
wherein a drum rotation stop stage is provided in between each of the plurality of rearrangement motions, and
wherein a direction of rotation of the drum is changed before and after the drum rotation stop stage.

Assignees

• Lg Electronics Inc

Inventors

• Noh Hyunwoo
• Hong Sangwook

Classifications

• D06F58/30 Primary

  Drying processes  (controlling a series of operations in domestic laundry dryers D06F58/32) · CPC title

• D06F18/00

  Washing machines having receptacles, stationary for washing purposes, and having further drying means  (control of washing or of washing and drying D06F33/00, D06F34/00; domestic laundry dryers D06F58/00) · CPC title

• D06F33/00

  Control of operations performed in washing machines or washer-dryers  (D06F31/00 takes precedence; details of control systems therefor D06F34/00; control of operations performed in domestic laundry dryers D06F58/32) · CPC title

• D06F2103/00

  Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers · CPC title

• D06F2103/34

  Humidity · CPC title