Laundry treating apparatus

Patent metadata

Field	Value
Publication number	US-12351965-B2
Application number	US-202217827109-A
Country	US
Kind code	B2
Filing date	May 27, 2022
Priority date	May 28, 2021
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

A laundry treating apparatus includes a dryer disposed in an indoor space; a washing machine vertically disposed with respect to the dryer; a refresher disposed on one side of the dryer and the washing machine; and a heating device heating air supplied to at least one of the dryer, the washing machine, and the refresher. The heating device includes a plurality of compressors, and controls a number of compressors to be operated and an RPM of the operated compressors, according to a cycle status of the dryer, the washing machine, and the refresher.

First claim

What is claimed is:

1. A laundry treating apparatus comprising:
a dryer;
a washing machine vertically disposed with respect to the dryer;
a refresher disposed on one side of the dryer and the washing machine;
a heating device including a plurality of compressors, the heating device configured to heat air supplied to at least one of the dryer, the washing machine, and the refresher;
a processor configured to control a number of the plurality of compressors to be operated and revolutions per minute (RPM) of each of the operated compressors for supplying hot air suitable for a cycle status of the dryer and configured to control a supply of hot air suitable for a cycle status of the refresher;
a first flow control valve disposed in a first passage between the heating device and the dryer;
a second flow control valve disposed in a second passage between the heating device and the washing machine; and
a third flow control valve disposed in a third passage between the heating device and the refresher,
wherein the processor is further configured to change an opening degree of each of the first flow control valve, the second flow control valve and the third flow control valve based on a required temperature during cycles of the dryer, the washing machine, and the refresher connected to the first to third passages in which the first to third flow control valves are disposed.

2. The laundry treating apparatus of claim 1 , wherein the plurality of compressors have different capacities from one another and use different compression methods.

3. The laundry treating apparatus of claim 1 , wherein a total capacity of the plurality of compressors is greater than a sum of loads of heated air required for the cycles of the dryer, the washing machine, and the refresher, and
wherein, among the plurality of compressors, a first compressor has a minimum capacity which is greater than a minimum load value among the loads required for the cycles of the dryer, the washing machine, and the refresher.

4. The laundry treating apparatus of claim 1 , wherein the processor is further configured to:
operate one compressor among the plurality of compressors in response to there being one laundry treating machine among the dryer, the washing machine, and the refresher that requires the heated air, and
operate two compressors among the plurality of compressors in response to there being two or more laundry treating machines among the dryer, the washing machine, and the refresher that require the heated air.

5. The laundry treating apparatus of claim 1 , wherein the processor is further configured to:
operate one compressor among the plurality of compressors in response to a temperature of the heated air required for cycles of the dryer, the washing machine, and the refresher being a first value or less, and
operate two compressors among the plurality of compressors in response to the temperature of the heated air required for the cycles of the dryer, the washing machine, and the refresher being a second value that is greater than the first value.

6. The laundry treating apparatus of claim 1 , wherein the processor is further configured to vary a number of compressors among the plurality of compressors to be operated according to a type of laundry treating machine among the dryer, the washing machine, and the refresher that requires the heated air.

7. The laundry treating apparatus of claim 1 , wherein the cycle status comprises one or more of a type of a cycle performed by each laundry treating machine of the dryer, the washing machine, and the refresher, a type of loaded laundry, and the required temperature for the cycle performed by each laundry treating machine of the dryer, the washing machine, and the refresher.

8. The laundry treating apparatus of claim 1 , wherein the processor is further configured to control the RPMs of the plurality of compressors when only one laundry treating machine among the dryer, the washing machine, and the refresher performs a cycle that requires air heated by the heating device to be lower than the RPMs of the plurality of compressors when two or more laundry treating machines among the dryer, the washing machine, and the refresher perform cycles that require the air heated by the heating device.

9. The laundry treating apparatus of claim 1 , wherein the processor is further configured to turn off the plurality of compressors at different times in response to completion of cycles of the dryer, the washing machine, and the refresher.

10. The laundry treating apparatus of claim 1 , wherein the heating device further includes:
an evaporator for dehumidifying air by heat exchange between introduced air and a low-temperature refrigerant;
a condenser for heating air by heat exchange between a high-temperature refrigerant and air; and
a fan for blowing the air heated by passing through the condenser.

11. The laundry treating apparatus of claim 10 , further comprising:
a first supply air duct connecting the dryer to the heating device; and
a second supply air duct connecting the washing machine to the heating device,
wherein the heating device further includes a switching device for controlling a direction of the air blown by the fan.

12. The laundry treating apparatus of claim 11 , further comprising a blowing duct surrounding the fan,
wherein the switching device includes:
a rotating body rotatably mounted in the blowing duct, the rotating body having a cut-out portion; and
a driving motor for rotating the rotating body to supply the blown air through the cut-out portion into the first supply air duct or the second supply air duct.

13. The laundry treating apparatus of claim 1 , wherein, the processor is further configured to open a respective one of the first flow control valve, the second flow control valve, and the third flow control valve to a maximum degree when only one of the plurality of compressors is operated, and the air heated by the heating device is supplied to any one laundry treating machine among the dryer, the washing machine, and the refresher.

14. The laundry treating apparatus of claim 1 , wherein, when only one of the plurality of compressors is operated and the air heated by the heating device is supplied to two or more laundry treating machines among the dryer, the washing machine, and the refresher, the processor is further configured to:
operate the heating device based on a first laundry treating machine among the two or more laundry treating machines that requires a highest temperature air, and
open a respective one of the first flow control valve, the second flow control valve and the third flow control valve connected to a second laundry treating machine among the two or more laundry treating machines that requires air of a lower temperature than the highest temperature to a minimum degree.

15. The laundry treating apparatus of claim 14 , wherein the processor is further configured to control the opening degree of the respective one of the first flow control valve, the second flow control valve and the third flow control valve, which is opened to the minimum degree, to gradually increase until the required temperature is reached.

16. The laundry treating apparatus of claim 1 , wherein, when the air heated by the heating device is supplied to any one laundry treating machine among the dryer, the washing machine, and the refresher, the processor is further configured to:
operate at least one of the plurality of compressors based on the required temperature of the one laundry treating machine supplied with the heated air, and
open a respective

Assignees

• Lg Electronics Inc

Inventors

• Lee Yunhi
• Kim Jaehyun
• Yoo Hyunsun

Classifications

• D06F58/206

  Heat pump arrangements · CPC title

• D06F39/04

  Heating arrangements · CPC title

• D06F2103/50

  related to heat pumps, e.g. pressure or flow rate · CPC title

• D06F2105/20

  Temperature · CPC title

• D06F73/02

  having one or more treatment chambers · CPC title