Laundry treating apparatus

Patent metadata

Field	Value
Publication number	US-10988895-B2
Application number	US-201916386559-A
Country	US
Kind code	B2
Filing date	Apr 17, 2019
Priority date	Apr 18, 2018
Publication date	Apr 27, 2021
Grant date	Apr 27, 2021

Abstract

A laundry treating apparatus may comprise a cabinet that defines an exterior design; a drum rotatably mounted in the cabinet and configured to accommodate laundry; a drive unit or motor configured to rotate the drum; a hot air supply unit or hot air blower configured to supply high-temperature air to the drum and in communication with the drum; a collection portion or liquid chamber provided to collect water condensed from the drum and in communication with the hot air supply unit; and a drainage pump configured to discharge the water collected in the collection portion outside the cabinet such that the laundry treating apparatus may sense whether the condensate collected in the collection portion is frozen and thaw the frozen condensate. A control method of the laundry treating apparatus may be provided to thaw and operate the laundry treating apparatus.

First claim

What is claimed is:

1. A laundry treating apparatus comprising:
a cabinet;
a drum provided in the cabinet and configured to accommodate laundry;
a motor configured to rotate the drum;
a hot air supply unit in communication with the drum to supply high-temperature air to the drum;
a liquid chamber in communication with the hot air supply unit to be supplied high-temperature air and to collect water formed from vapor discharged from the drum;
a drainage pump configured to discharge the water collected in the liquid chamber outside the cabinet;
a controller configured to control the motor, the hot air supply unit, and the drainage pump; and
a thawing command input unit provided on the cabinet to receive a thawing command for thawing frozen water of the liquid chamber, wherein the liquid chamber is provided to be separated and spaced apart from the hot air supply unit.

2. The laundry treating apparatus of claim 1 , wherein, when the thawing command is received, the controller is configured to drive one or more of the hot air supply unit and the motor, and is further configured to shut off the drainage pump for a reference time period.

3. The laundry treating apparatus of claim 2 , wherein, if the reference time period passes, the controller is configured to drive the drainage pump to check whether the thawing of the frozen water has been performed or completed.

4. The laundry treating apparatus of claim 3 , wherein the controller is configured to drive the drainage pump at a first time interval after the reference time period to check whether the thawing of the frozen water has been completed.

5. The laundry treating apparatus of claim 3 , wherein the controller is configured to check that the thawing of the frozen water is completed by sensing whether a rotation rate of an impeller of the drainage pump is at or above a reference rotation rate.

6. The laundry treating apparatus of claim 5 , wherein the controller is configured to discharge water collected in the liquid chamber by driving the drainage pump when the controller determines that the thawing of the frozen water is completed.

7. The laundry treating apparatus of claim 1 , further comprising a temperature sensor configured to sense a temperature of the drum or the hot air supply unit, wherein the controller determines that the water in the liquid chamber is frozen when the temperature sensor senses a temperature lower than a reference temperature or when the controller senses that a rotation rate of an impeller of the drainage pump is at or below a reference rotation rate.

8. The laundry treating apparatus of claim 7 , wherein the reference temperature is higher than a freezing point of the water.

9. The laundry treating apparatus of claim 7 , wherein, when the controller determines that the water of the liquid chamber is frozen but does not sense the thawing command, the controller is configured to stop an operation of one or more of the motor, the hot air supply unit, and the drainage pump.

10. A control method of a laundry treating apparatus comprising:
a thawing input step for sensing an input of a thawing command that is received by a thawing command input unit of the laundry treating apparatus; and
an intensive thawing step for transferring heat to a liquid chamber of the laundry treating apparatus by driving a hot air supply unit of the laundry treating apparatus, wherein the hot air supply unit is in communication with the liquid chamber to supply hot air to the liquid chamber, the liquid chamber collects condensation from a drum that holds laundry of the laundry treating apparatus, and the liquid chamber is separated and spaced apart from the hot air supply unit.

11. The control method of claim 10 , wherein the intensive thawing step comprises:
a hot air supply step for transferring heat to the liquid chamber by driving the hot air supply unit; and
a drainage pump shut-off step for stopping a drainage pump for a predetermined time period.

12. The control method of claim 10 , further comprising a thawing check step for sensing whether condensation in the liquid chamber is thawed.

13. The control method of claim 12 , wherein sensing whether the condensation is thawed includes sensing a rotation rate of an impeller of the drainage pump while driving the drainage pump at a first time interval after the predetermined time period.

14. The control method of claim 13 , wherein the thawing check step includes determining that the thawing is completed when the sensed rotation rate is at or above a reference rotation rate.

15. The control method of claim 10 , further comprising a frozen state sensing step for determining whether the condensation in the liquid chamber is frozen.

16. The control method of claim 15 , further comprising an error display step for stopping an operation of the laundry treating apparatus and displaying an error on a display of the laundry treating apparatus when it is determined that the condensation of the liquid chamber is frozen but the thawing command is not received.

17. A control method of a laundry treating apparatus comprising determining whether water condensed in a drum of a laundry treating apparatus and accumulated in a liquid chamber is freezing or frozen, wherein the laundry treating apparatus includes a motor that rotates the drum, a hot air blower configured to supply high-temperature air to the drum and that is in communication with the liquid chamber and the drum to supply high-temperature air to the drum and the liquid chamber, the liquid chamber being separated and spaced apart from the hot air blower, and a drainage pump configured to discharge water collected in the liquid chamber to an outside.

18. The control method of claim 17 , comprising:
sensing a rotation rate of an impeller of the drainage pump of the laundry treating apparatus; and
sensing a temperature of one or more of the drum or the hot air blower via a temperature sensor,
determining that the water of the liquid chamber is freezing or frozen when the sensed rotation rate is at a reference rotation rate or less, and the sensed temperature is at a reference temperature or less.

19. The control method of claim 18 , wherein the reference temperature is higher than the freezing point of water.

20. The control method of claim 17 , further comprising an error ignoring step for implementing a controller of the laundry treating apparatus to control an operation of at least one of the drum or the hot air blower when the controller determines that the water in the liquid chamber is freezing or frozen.

21. The control method of claim 17 , further comprising a fast thawing step for transferring heat to the liquid chamber by driving the hot air blower after determining that the water in the liquid chamber is freezing or frozen.

22. The control method of claim 21 , wherein the fast thawing step comprises:
a hot air supply step for transferring heat to the liquid chamber by driving the hot air blower; and
a drainage pump stopping step for stopping an operation of the drainage pump for a predetermined time period.

23. The control method of claim 22 , further comprising a thawing check step for sensing whether at least some water in the liquid chamber is thawed.

24. The control method of claim 23 , wherein the thawing check step includes driving the drainage pump when the reference time passes or when a water level sensor senses, via a water level sensor, that a water level of t

Assignees

• Lg Electronics Inc

Inventors

• Kim Shinwon
• Ahn Ingeun
• Heo Seonil

Classifications

• D06F58/50 Primary

  Responding to irregular working conditions, e.g. malfunctioning of blowers · CPC title

• D06F58/10

  Drying cabinets or drying chambers having heating or ventilating means · CPC title

• Y02B40/00

  Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers · CPC title

• D06F58/30

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

• D06F58/26

  Heating arrangements, e.g. gas heating equipment (D06F58/18 takes precedence) · CPC title