IP Library › Granted Patent US 12,553,167
Granted Patent B2
US 12,553,167 · App. 18/357,057 · Granted Feb 17, 2026

Detecting a wash substance during a wash cycle of a washing machine appliance

Inventors: Seonghoon Ryu (Suwan-si, KR); Joohyun Park (Seongnam-si, KR)
Assignee: Haier US Appliance Solutions, Inc.
D06F33/36D06F34/22D06F2103/22D06F2105/58D06F2105/62
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Quick Facts
Patent No.
US 12,553,167
App. No.
18/357,057
Granted
Feb 17, 2026
Kind
B2
Abstract

A method for operating a washing machine appliance may include a step of activating a wash cycle of the washing machine appliance. The method may also include a step of flowing a fill of liquid water to a tub of the washing machine appliance. The method may further include a step of flowing a wash substance to the tub of the washing machine appliance. The method may also include a step of monitoring conductivity measurements and turbidity measurements of the tub. The method may further include a step of determining a classification of the wash substance flowed to the tub of the washing machine appliance. The method may also include a step of comparing the determined classification of the wash substance to a selected classification of the wash substance.

Claims (37)

1 . A method for operating a washing machine appliance, the method comprising:

receiving, from a remote user interface device, a user input indicating an operation of a wash cycle at the washing machine appliance, wherein the user input includes a user-selected classification of a target wash substance to be utilized during the wash cycle, wherein the user-selected classification of the target wash substance comprises a target wash additive;

activating the wash cycle of the washing machine appliance in response to receiving the user input;

flowing a fill of liquid water to a tub of the washing machine appliance;

flowing a wash substance to the tub of the washing machine appliance;

monitoring, with a sensor assembly, conductivity measurements and turbidity measurements of a fluid in the tub in response to flowing the wash substance to the tub of the washing machine appliance, wherein the conductivity measurements and the turbidity measurements are monitored for a predetermined amount of time;

determining, based on the monitored conductivity measurements and the monitored turbidity measurement, a classification of the wash substance flowed to the tub of the washing machine appliance; and

comparing the determined classification of the wash substance to the user-selected classification of the target wash substance.

2 . The method of claim 1 , further comprising determining, based on the compared determined classification of the wash substance to the user-selected classification of the target wash substance, that the determined classification of the wash substance is different from the user-selected classification of the target wash substance.

3 . The method of claim 2 , further comprising pausing the wash cycle of the washing machine appliance in response to the determined classification being different from the user-selected classification.

4 . The method of claim 2 , further comprising providing a user notification on the remote user interface device in response to the determined classification being different from the user-selected classification, wherein the user notification comprises a prompt that indicates the determined classification of the wash substance is different from the user-selected classification of the target wash substance.

5 . The method of claim 1 , further comprising determining, based on the compared determined classification of the wash substance to the user-selected classification of the target wash substance, that the determined classification of the wash substance is the same as the user-selected classification of the target wash substance.

6 . The method of claim 5 , wherein the wash cycle of the washing machine appliance is continued.

7 . The method of claim 1 , wherein the monitored conductivity measurements and turbidity measurements each comprise a value pattern.

8 . The method of claim 7 , wherein the classification of the wash substance is determined based on the value pattern of the monitored conductivity measurements and the value pattern of the monitored turbidity measurements.

9 . The method of claim 1 , wherein the sensor assembly comprises a conductivity sensor and a turbidity sensor and wherein the conductivity sensor and the turbidity sensor are combined into a single component to form the sensor assembly.

10 . The method of claim 1 , wherein the wash substance is a cleaning agent or a wash additive.

11 . A washing machine appliance comprising:

a tub;

a sensor assembly positioned on a bottom wall of the tub, the sensor assembly configured to continuously record a conductivity measurement and a turbidity measurement of a fluid in the tub; and

a controller, the controller operable for

receiving, from a remote user interface device in operative communication with the controller, a user input indicating an operation of a wash cycle at the washing machine appliance, wherein the user input includes a user-selected classification of a target wash substance to be utilized during the wash cycle, wherein the user-selected classification of the target wash substance comprises a target wash additive;

activating the wash cycle of the washing machine appliance in response to receiving the user input;

flowing a fill of liquid water to the tub of the washing machine appliance;

flowing a wash substance to the tub of the washing machine appliance;

monitoring, with the sensor assembly, conductivity measurements and turbidity measurements of a fluid in the tub in response to flowing the wash substance to the tub of the washing machine appliance, wherein the conductivity measurements and the turbidity measurements are monitored for a predetermined amount of time;

determining, based on the monitored conductivity measurements and the monitored turbidity measurement, a classification of the wash substance flowed to the tub of the washing machine appliance; and

comparing the determined classification of the wash substance to the user-selected classification of the target wash substance.

12 . The washing machine appliance of claim 11 , wherein the controller is further operable for determining, based on the compared determined classification of the wash substance to the user-selected classification of the target wash substance, that the determined classification of the wash substance is different from the user-selected classification of the target wash substance.

13 . The washing machine appliance of claim 12 , wherein the controller is further operable for pausing the wash cycle of the washing machine appliance in response to the determined classification being different from the user-selected classification.

14 . The washing machine appliance of claim 12 , wherein the controller is further operable for providing a user notification on the remote user interface device in response to the determined classification being different from the user-selected classification, wherein the user notification comprises a prompt that indicates the determined classification of the wash substance is different from the user-selected classification of the target wash substance.

15 . The washing machine appliance of claim 11 , wherein the controller is further operable for determining, based on the compared determined classification of the wash substance to the user-selected classification of the target wash substance, that the determined classification of the wash substance is the same as the user-selected classification of the target wash substance.

16 . The washing machine appliance of claim 15 , wherein the wash cycle of the washing machine appliance is continued.

17 . The washing machine appliance of claim 11 , wherein the monitored conductivity measurements and turbidity measurements each comprise a value pattern.

18 . The washing machine appliance of claim 17 , wherein the classification of the wash substance is determined based on the value pattern of the monitored conductivity measurements and the value pattern of the monitored turbidity measurements.

19 . The washing machine appliance of claim 11 , wherein the sensor assembly comprises a conductivity sensor and a turbidity sensor.

20 . The washing machine appliance of claim 11 , wherein the wash substance is a cleaning agent or a wash additive.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 21, 2023
From: RYU, SEONGHOON; PARK, JOOHYUN
To: HAIER US APPLIANCE SOLUTIONS, INC.
Reel/Frame 064345/0749 →
Continuity (1)
Related Publication 20250027247A1 · Jan 23, 2025
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