Laundry treating apparatus

Patent metadata

Field	Value
Publication number	US-11225752-B2
Application number	US-201916411658-A
Country	US
Kind code	B2
Filing date	May 14, 2019
Priority date	May 16, 2016
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

A laundry treating apparatus is disclosed. The laundry treating apparatus includes a cabinet configured to define a receiving space for receiving laundry, the cabinet having an open surface, a door hingedly provided at the cabinet for opening and closing the open surface of the cabinet, a laundry support unit provided in the receiving space for supporting laundry, and a machinery compartment provided in the cabinet for defining a space that is separate from the receiving space, the machinery compartment being provided therein with an air supply unit for dehumidifying or heating air in the receiving space and supplying the dehumidified or heated air into the receiving space. The air supply unit dehumidifies air in a room that communicates with the receiving space in the state in which the door is open.

First claim

What is claimed is:

1. A control method for a laundry treating apparatus comprising a cabinet including an opening at a front side, and configured to define a receiving space for receiving laundry inside the cabinet; a door hingedly provided at the cabinet for opening and closing the opening; a machinery compartment below the receiving space in the cabinet; and an air supply unit provided in the machinery compartment and including a circulation duct provided in the machinery compartment for circulating air in the receiving space; a blower provided in the circulation duct; an evaporator and a condenser located inside the circulation duct for dehumidifying and heating the circulating air by exchanging heat with a refrigerant; an expansion valve located outside the circulation duct for expanding the refrigerant; and a compressor located outside the circulation duct for compressing and circulate the refrigerant through the evaporator, the condenser, and the expansion valve, wherein the control method comprises:
receiving an input information by a user from a display panel that is provided on a front surface of the door;
sensing whether the door is open or closed with an opening and closing sensing unit for sensing whether the door is open or closed and sensing an opening angle of the door;
initiating the blower; and
based on the input information and the opening angle of the door, adjusting an opening degree of the expansion valve and a driving frequency of the compressor.

2. The control method according to claim 1 , wherein the opening degree is set to a first predetermined opening degree and a driving frequency is set to a first predetermined driving frequency when the door is closed and the input information is a drying mode to dry the laundry in the receiving space is located with the door closed.

3. The control method according to claim 2 , further comprising:
periodically measuring a temperature of the refrigerant (Tr) with a first temperature sensor located upstream from the evaporator in a flow direction of the refrigerant, configured to measure the temperature of the refrigerant (Tr) that is supplied to the evaporator; and
periodically decreasing the first predetermined opening degree if the temperature of the refrigerant (Tr) is higher than a first predetermined temperature, or periodically increasing the first predetermined opening degree if the temperature of the refrigerant (Tr) is lower than the first predetermined temperature.

4. The control method according to claim 3 , further comprising:
periodically measuring a temperature of the air (Ta) with a second temperature sensor located in a downstream end of the circulation duct in air flow direction and configured to measure the temperature of the air (Ta) that is discharged to the receiving space through the evaporator and the condenser; and
periodically decreasing the first predetermined driving frequency if the temperature of the air (Ta) is higher than a second predetermined temperature, or periodically increasing the first predetermined driving frequency if the temperature of the air (Ta) is lower than the second predetermined temperature.

5. The control method according to claim 4 , further comprising:
determining whether drying is completed, based on a temperature and humidity in the receiving space or based on whether a predetermined operation time of the drying mode is elapsed.

6. The control method according to claim 5 , wherein the predetermined operation time of the drying mode is changeable by the user with the display panel.

7. The control method according to claim 2 , further comprising:
displaying an error message at the display panel when the door is open and the input information is the drying mode.

8. The control method according to claim 1 , further comprising:
opening the expansion valve to a second predetermined opening degree and driving the compressor at a second predetermined driving frequency when the door is open and the input information is a dehumidification mode to dehumidify a room in which the laundry treating apparatus is located with the door opened.

9. The control method according to claim 8 , further comprising:
displaying an error message at the display panel when the door is closed and the input information is the dehumidification mode.

10. The control method according to claim 9 , further comprising:
periodically measuring a temperature of the refrigerant (Tr) with a first temperature sensor located upstream from the evaporator in a flow direction of the refrigerant, configured to measure the temperature of the refrigerant (Tr) that is supplied to the evaporator; and
periodically decreasing the second predetermined opening degree if the temperature of the refrigerant (Tr) is higher than a third predetermined temperature, or periodically increasing the second predetermined opening degree if the temperature of the refrigerant (Tr) is lower than the third predetermined temperature.

11. The control method according to claim 10 , further comprising:
periodically measuring a temperature of the air (Ta) with a second temperature sensor located in a downstream end of the circulation duct in air flow direction and configured to measure the temperature of the air (Ta) that is discharged to the receiving space through the evaporator and the condenser; and
periodically decreasing the second predetermined driving frequency if the temperature of the air (Ta) is higher than a fourth predetermined temperature, or periodically increasing the second predetermined driving frequency if the temperature of the air (Ta) is lower than the fourth predetermined temperature.

12. The control method according to claim 11 , further comprising:
determining whether dehumidification is completed, based on the temperature and humidity in the room or based on whether a predetermined operation time of the dehumidification mode is elapsed.

13. The control method according to claim 12 , wherein the predetermined operation time the dehumidification mode is changeable by user with the display panel.

14. The control method according to claim 8 , further comprising:
sensing the opening angle of the door;
adjusting the second predetermined opening degree and the second predetermined driving frequency respectively, based on the opening angle of the door.

Assignees

• Lg Electronics Inc

Inventors

• Nam Wansik
• Kim Donghyun
• Park Jumin

Classifications

• A61L2103/50

  Textiles, e.g. bedwear or towels · CPC title

• F24F2003/144

  by dehumidification only · CPC title

• D06F35/00

  Washing machines, apparatus, or methods not otherwise provided for · 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

• A47B61/00

  Wardrobes · CPC title