Laundry appliances cold water sanitization

Patent metadata

Field	Value
Publication number	US-11725327-B2
Application number	US-202117245226-A
Country	US
Kind code	B2
Filing date	Apr 30, 2021
Priority date	Apr 30, 2021
Publication date	Aug 15, 2023
Grant date	Aug 15, 2023

Abstract

A laundry appliance includes a cabinet defining an opening with a laundry vessel mounted within the cabinet. The laundry vessel defines a treatment chamber. The laundry appliance also includes an electrolytic hypochlorous acid generator upstream of the treatment chamber with respect to a flow of cold water through the laundry appliance and a controller. The controller may be configured for and/or a method of sanitizing the laundry appliance may include opening a valve upstream of the electrolytic hypochlorous acid generator to provide the flow of cold water through the laundry appliance, confirming the presence of the cold water in the laundry appliance after opening the valve, and activating the electrolytic hypochlorous acid generator after confirming the presence of the cold water in the laundry appliance.

First claim

What is claimed is:

1. A method of sanitizing a laundry appliance, the laundry appliance including a cabinet defining an opening, a laundry vessel mounted within the cabinet, the laundry vessel defining a treatment chamber, and an electrolytic hypochlorous acid generator spaced apart from the laundry vessel and upstream of the treatment chamber with respect to a flow of cold water through the laundry appliance, the electrolytic hypochlorous acid generator comprising an inlet coupled to a water supply line, whereby the flow of cold water enters the electrolytic hypochlorous acid generator at the inlet, a reaction chamber defined in a body of the electrolytic hypochlorous acid generator downstream of the inlet, an electrode positioned in the reaction chamber, and an outlet downstream of the reaction chamber, the method comprising:
opening a valve upstream of the electrolytic hypochlorous acid generator to provide the flow of cold water through the laundry appliance, thereby providing a cold water fill for a self-clean cycle of the laundry appliance, and wherein the volume of water used in the cold water fill of the self-clean cycle is the same as a volume of water used in a cold water fill of a self-clean cycle that does not include the method of sanitizing the laundry appliance;
confirming the cold water is present in the laundry appliance after opening the valve; and
activating the electrolytic hypochlorous acid generator after confirming the cold water is present in the laundry appliance.

2. The method of claim 1 , wherein the laundry appliance is a washing machine appliance, the laundry vessel is a wash basket positioned within a wash tub of the washing machine appliance, the washing machine appliance further comprising a sump defined by the tub outside of the wash basket, the electrolytic hypochlorous acid generator positioned in the sump, wherein the step of confirming the presence of the cold water in the laundry appliance comprises confirming that a pressure in the sump is above a pressure threshold with a pressure sensor.

3. The method of claim 1 , wherein the step of confirming the presence of the cold water in the laundry appliance comprises checking for water level codes in a memory of a controller of the laundry appliance.

4. The method of claim 3 , wherein the laundry appliance is a dryer appliance and the water supply line is fluidly coupled to a spray nozzle positioned and configured to direct the flow of cold water through the dryer appliance into the treatment chamber in the form of a mist of cold water, the method further comprising spraying the cold water into the treatment chamber from the spray nozzle when the valve upstream of the electrolytic hypochlorous acid generator is opened.

5. The method of claim 3 , wherein the laundry appliance is a washing machine appliance and the water supply line is a spout coupled to a detergent drawer, wherein the step of activating the electrolytic hypochlorous acid generator is performed when the detergent drawer is empty.

6. A washing machine appliance defining a vertical direction, a lateral direction, and a transverse direction that are mutually perpendicular to one another, the washing machine appliance comprising:
a cabinet defining an opening;
a wash tub mounted within the cabinet;
a wash basket positioned within the wash tub, the wash basket defining a treatment chamber;
an electrolytic hypochlorous acid generator spaced apart from the laundry vessel and upstream of the treatment chamber with respect to a flow of cold water through the washing machine appliance, the electrolytic hypochlorous acid generator comprising an inlet coupled to a water supply line, whereby the flow of cold water enters the electrolytic hypochlorous acid generator at the inlet, a reaction chamber defined in a body of the electrolytic hypochlorous acid generator downstream of the inlet, an electrode positioned in the reaction chamber, and an outlet downstream of the reaction chamber;
a sump defined by the wash tub outside of the wash basket, the electrolytic hypochlorous acid generator positioned in the sump; and
a controller, the controller configured for:
opening a valve upstream of the electrolytic hypochlorous acid generator to provide the flow of cold water through the washing machine appliance;
confirming the presence of the cold water in the washing machine appliance after opening the valve; and
activating the electrolytic hypochlorous acid generator after confirming the presence of the cold water in the washing machine appliance.

7. The washing machine appliance of claim 6 , further comprising a pressure sensor positioned and configured to measure a liquid pressure within the sump, wherein the controller is configured for confirming the presence of the cold water in the washing machine appliance by confirming that a pressure in the sump is above a pressure threshold with the pressure sensor.

8. The washing machine appliance of claim 6 , wherein the controller is configured for confirming the presence of the cold water in the washing machine appliance by checking for water level codes in a memory of the controller.

9. The washing machine appliance of claim 6 , wherein the the water supply line is fluidly coupled to a spray nozzle positioned and configured to direct the flow of cold water through the washing machine appliance into the treatment chamber in the form of a mist of cold water.

10. The washing machine appliance of claim 9 , wherein opening the valve upstream of the electrolytic hypochlorous acid generator to provide the flow of cold water through the washing machine appliance comprises spraying the cold water into the treatment chamber from the spray nozzle in the form of the mist of cold water.

11. The washing machine appliance of claim 6 , wherein the water supply line is a spout coupled to a detergent drawer.

12. The washing machine appliance of claim 11 , wherein the controller is configured for activating the electrolytic hypochlorous acid generator when the detergent drawer is empty.

13. The washing machine appliance of claim 6 , wherein opening the valve upstream of the electrolytic hypochlorous acid generator to provide the flow of cold water through the washing machine appliance comprises providing a cold water fill for a self-clean cycle of the washing machine appliance, and wherein the volume of water used in the cold water fill of the self-clean cycle is the same as a volume of water used in a cold water fill of a self-clean cycle that does not include sanitizing the washing machine appliance.

14. The washing machine appliance of claim 6 , wherein opening the valve upstream of the electrolytic hypochlorous acid generator to provide the flow of cold water through the washing machine appliance comprises providing a cold water fill for a rinse cycle of the washing machine appliance, and wherein the volume of water used in the cold water fill of the rinse cycle is the same as a volume of water used in a cold water fill of a rinse cycle that does not include sanitizing the washing machine appliance.

15. The washing machine appliance of claim 6 , wherein the inlet of the electrolytic hypochlorous acid generator coupled to the water supply line is the only inlet into the reaction chamber of the electrolytic hypochlorous acid generator.

16. The washing machine appliance of claim 6 , wherein the electrolytic hypochlorous acid generator further comprises an additive inlet coupled to a reactant supply, whereby the flow of cold water from the water supply line mixes with a reactant from the reactant supply within the reaction chamber.

Assignees

• Haier Us Appliance Solutions Inc

Inventors

• Maeng Hyoyeol
• Yi Kyoung-June
• Park Hansung
• Park Joohyun
• Yoon Je Kwon

Classifications

• D06F35/008 Primary

  for disinfecting the tub or the drum · CPC title

• D06F35/003

  using electrochemical cells · CPC title

• D06F39/088

  Liquid supply arrangements · CPC title

• D06F2103/18

  Washing liquid level · CPC title

• D06F2103/22

  Content of detergent or additives · CPC title