Washing machine and method for controlling the same

1 . A washing machine comprising:

a tub;

a water supply valve configured to open or close a flow path to supply water to the tub;

a memory storing water pressure information that includes water supply operation time of the water supply valve; and

a controller configured to:

control the water supply valve to supply water to the tub to a target water level,

determine whether water pressure of the water supplied by the water supply valve is abnormal based on supplying the water to the tub to the target water level,

based on determining that the water pressure of the water supply valve is abnormal, update the water pressure information stored in the memory by adjusting the water supply operation time, and

use the updated water pressure information stored in the memory to control the water supply valve in an operation course of the washing machine.

2 . The washing machine of claim 1 , wherein

the controller is configured to:

enter a tub cleaning course,

based on the washing machine being in the tub cleaning course, control of the water supply valve to supply water to the tub to the target water level,

determine whether the water pressure of the water supplied by the water supply valve is abnormal based on supplying the water to the tub to the target water level, and

update the water pressure information stored in the memory by adjusting the water supply operation time.

3 . The washing machine of claim 2 , wherein the operation course is a washing course of clothes or a rinsing course of clothes performed after the tub cleaning course.

4 . The washing machine of claim 1 , wherein the controller is configured to:

detect time taken to supply the water to the target water level after start of water supply through the water supply valve, and

determine whether the water pressure of the water supplied by the water supply valve is abnormal based on the detected time.

5 . The washing machine of claim 1 , wherein the controller is configured to:

update the water pressure information stored in the memory during performance of a washing course of clothes or a rinsing course of clothes, and

use the updated water pressure information stored in the memory in a subsequent water supply operation within the washing course or the rinsing course.

6 . The washing machine of claim 1 , wherein the controller is configured to:

perform a drain operation to a preset minimum water level based on determining that the water pressure of the water supply valve is abnormal,

detect time taken to supply water from the preset minimum water level to the target water level, and

adjust the water supply operation time of the water supply valve based on the detected time.

7 . The washing machine of claim 1 , wherein

the water supply valve includes a plurality of water supply valves, and

the controller is configured to:

based on determining that the water pressure of the water supplied by at least one of the plurality of water supply valves is in an abnormal state, increase a water supply operation time of at least one of the other water supply valves not in the abnormal state.

8 . The washing machine of claim 1 , further comprising:

a filter in the flow path to filter foreign materials in the water,

wherein the controller is configured to:

store an accumulated number of times of determining that water pressure of the water supply valve is abnormal, and

determine that the filter is clogged based on the accumulated number of times exceeding a threshold number.

9 . The washing machine of claim 1 , wherein the controller is configured to:

determine that the tub has a leak based on reduction in water level after a preset stabilization time elapses from when the water level in the tub reaches the target water level.

10 . The washing machine of claim 1 , further comprising:

a communication interface configured to communicate with an external user device,

wherein the controller is configured to:

control the communication interface to provide a notification about abnormal water pressure of the water supply valve and adjustment of the water supply operation time.

11 . A method of controlling a washing machine including a tub, a water supply valve configured to open or close a flow path to supply water to the tub, a memory storing water pressure information that includes water supply operation time of the water supply valve, and a controller, the method comprising:

by the controller,

controlling the water supply valve to supply water to the tub to a target water level;

determining whether water pressure of the water supplied by the water supply valve is abnormal based on supplying the water to the tub to the target water level;

based on determining that the water pressure of the water supply valve is abnormal, updating the water pressure information stored in the memory by adjusting the water supply operation time; and

using the updated water pressure information stored in the memory to control the water supply valve in an operation course of the washing machine.

12 . The method of claim 11 , further comprising:

by the controller,

entering a tub cleaning course,

based on the washing machine being in the tub cleaning course, controlling of the water supply valve to supply water to the tub to the target water level,

determining whether the water pressure of the water supplied by the water supply valve is abnormal based on supplying the water to the tub to the target water level, and

updating the water pressure information stored in the memory by adjusting the water supply operation time.

13 . The method of claim 12 , wherein the operation course is a washing course of clothes or a rinsing course of clothes to be performed after the tub cleaning course.

14 . The method of claim 11 , wherein the determining whether the water pressure is abnormal includes:

detecting time taken to supply water to the target water level after start of water supply through the water supply valve, and

determining whether the water pressure of the water supplied by of the water supply valve is abnormal based on the detected time.

15 . The method of claim 11 , further comprising:

updating the water pressure information stored in the memory during performance of a washing course of clothes or a rinsing course of clothes, and

using the updated water pressure information stored in the memory in a subsequent scheduled water supply operation within the washing course or the rinsing course.

16 . The method of claim 14 , the determining includes:

determining whether the water pressure of the water supplied by the water supply valve is abnormal based on by comparing the detected time and a reference time included in the water pressure information.

17 . The washing machine of claim 4 , wherein the controller is configured to

determine whether the water pressure of the water supplied by the water supply valve is abnormal based on comparing the detected time and a reference time included in the water pressure information.

18 . The method of claim 11 , further comprising:

performing a drain operation to a preset minimum water level based on determining that the water pressure of the water supply valve is abnormal,

detecting time taken to supply water from the preset minimum water level to the target water level, and

adjusting the water supply operation time of the water supply valve based on the detected time.

19 . The method of claim 11 , wherein

the water supply valve includes a plurality of water supply valves, and

the updating includes:

based on determining that the water pressure of the water supplied by at least one of the plurality of water supply valves is in an abnormal state, increasing a water supply operation time of at least one of the other water supply valves not in the abnormal state.

20 . The method of claim 11 , wherein

the washing machine further comprises a filter in the flow path to filter foreign materials in the water, and

the method further comprising:

storing an accumulated number of times of determining that water pressure of the water supply valve is abnormal, and

determining that the filter is clogged based on the accumulated number of times exceeding a threshold number.