Methods and compositions for treating laundry items

• US 9,689,101 B2
• Filed: 05/12/2014
• Issued: 06/27/2017
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Whirlpool Corporation
• Original Assignee: Whirlpool Corporation
• Inventors: Schiesser, Ricardo N., Alexander, Benjamin E., Pinkowski, Robert J.
• Primary Examiner(s): Perrin, Joseph L
• Application Number:
  US14/275,114
• Publication Number:
  US 20140259450A1
• Time in Patent Office: 1,142 Days
• CPC Class Codes: C11D 1/62 Quaternary ammonium compounds
• CPC Class Codes: C11D 1/72 Ethers of polyoxyalkylene glycols
• CPC Class Codes: C11D 1/835 Mixtures of non-ionic with cationic compounds
• CPC Class Codes: C11D 2111/12 Soft surfaces, e.g. textile
• CPC Class Codes: C11D 3/0021 Dye-stain or dye-transfer inhibiting compositions
• CPC Class Codes: D06F 2101/04 Quantity, e.g. weight
• CPC Class Codes: D06F 2103/04 Quantity, e.g. weight or variation of weight
• CPC Class Codes: D06F 2105/42 Detergent or additive supply
• CPC Class Codes: D06F 33/37 of metering of detergents or additives
• CPC Class Codes: D06M 13/395 Isocyanates
• CPC Class Codes: D06M 13/402 Amides imides, sulfamic acids
• CPC Class Codes: G05B 15/02 electric

Abstract

A laundry treating appliance having a rotatable treating chamber in which laundry is received for treatment, and a controller programmed to execute an automatic cycle of operation that includes spraying a pre-wash mixture comprising water and a color care agent onto the laundry to cover the laundry with the color care agent to protect the laundry from dyes released from the laundry during the wash phase.

Claims

1. A laundry treating appliance having a treating chamber that is rotatable, in which laundry is received for treatment, and a controller programmed to execute an automatic cycle of operation comprising:

a load detection phase where an amount of laundry within the treating chamber is determined;

a pre-wash phase comprising;

forming a pre-wash mixture comprising water and a color care agent, with an amount of color care agent set according to the amount of laundry determined;

spraying the pre-wash mixture into the treating chamber to wet laundry in the treating chamber; and

controlling at least one of the forming of the pre-wash or the spraying to uniformly wet the laundry with an even coverage of color care agent, without oversaturating of the color care agent; and

a wash phase, following the pre-wash phase, comprising;

forming a wash mixture comprising water and detergent;

supplying the wash mixture to the treating chamber; and

applying mechanical energy to the laundry; and

wherein the pre-wash phase covers the laundry with the color care agent to protect the laundry from dyes released during the wash phase.

2. The laundry treating appliance of claim 1 wherein the pre-wash phase minimizes an application of mechanical energy to the laundry.

3. The laundry treating appliance of claim 2 wherein-the minimizing of the application of mechanical energy comprises excluding at least one of rotating the treating chamber an amount sufficient to effect a tumbling of the laundry or operating a clothes mover within the treating chamber.

4. The laundry treating appliance of claim 1 further comprising rotating the treating chamber at a spraying speed great enough to prevent tumbling of the laundry during the spraying.

5. The laundry treating appliance of claim 4 wherein the spraying speed is sufficient to apply a centrifugal force of at least 1 G to the laundry.

6. The laundry treating appliance of claim 5 wherein the spraying speed is varied to create a plurality of flow channels within the laundry.

7. The laundry treating appliance ^te of claim 1 wherein the treating chamber is rotated during the spraying at least one of at a slow speed, which is slow enough that articles forming the laundry do not move relative to themselves, or at a fast speed, which is fast enough that the laundry experiences a centrifugal force of at least 1 G.

8. The laundry treating appliance of claim 7 wherein the treating chamber is rotated at both the slow speed and the fast speed during the spraying, and during an acceleration from the slow speed to the fast speed the spraying is temporarily halted.

9. The laundry appliance of claim 1 wherein controlling the forming the pre-wash mixture comprises forming the mixture at a predetermined concentration of color care agent.

10. The laundry treating appliance of claim 1 wherein controlling the forming the pre-wash mixture comprises supplying the water to the treating chamber and introducing the color care agent into the water during the supplying of the water.

11. The laundry treating appliance of claim 10 wherein the introducing the color care agent comprises dosing a portion of a total dose of color care agent.

12. The laundry treating appliance of claim 11 wherein dosing a portion comprises continuously dosing a portion of the total dose of the color care agent.

14. The laundry treating appliance of claim 1 wherein the spraying comprises spraying a portion of the treating chamber.

15. The laundry treating appliance of claim 14 wherein spraying a portion of the treating chamber comprises repeatedly spraying multiple portions of the treating chamber.

16. The laundry treating appliance of claim 1 wherein the spraying comprises simultaneously spraying the entire treating chamber.

17. The laundry treating appliance of claim 16 wherein the simultaneous spraying occurs while the treating chamber is stationary.

18. The laundry treating appliance of claim 1 wherein uniformly wetting the laundry comprises covering at least an exposed portion of the laundry with an even distribution of color care agent.

19. The laundry treating appliance of claim 18 wherein the even distribution of color care agent comprises spraying a constant concentration of color care agent.

20. The laundry treating appliance of claim 18 wherein the covering at least antbe exposed portions of the laundry comprises covering all portions of the laundry.

21. The laundry treating appliance of claim 1 further comprising no draining of the pre-wash mixture from the treating chamber between an end of the pre-wash phase and a beginning of the wash phase.

22. The laundry treating appliance of claim 1 further comprising no extraction of the pre-wash mixture from the laundry between an end of the pre-wash phase and a beginning of the wash phase.

23. The laundry treating appliance of claim 1 further comprising extracting a portion of the prewash mixture from the laundry between an end of the pre-wash phase and a beginning of the wash phase such that a predetermined amount of pre-wash mixture remains with the laundry.

24. The laundry treating appliance of claim 1 further comprising extracting a portion of the prewash mixture from the laundry between an end of the pre-wash phase and a beginning of the wash phase such that a predetermined amount of pre-wash mixture remains in a sump of the laundry treating appliance.

25. The laundry treating appliance of claim 1 further comprising heating the color care agent.

26. The laundry treating appliance of claim 25 wherein the heating occurs when the color care agent is on the laundry.

27. The laundry treating appliance of claim 26 wherein the heating is stopped prior to the laundry reaching a setting temperature of blood.

28. The laundry treating appliance of claim 27 wherein the heating comprises providing heated air to the treating chamber.

29. The laundry treating appliance of claim 28 wherein the treating chamber is rotated during at least a portion of the heating.

13. The laundry treating appliance wherein dosing a portion comprises repeatedly dosing micro-doses of the total dose of the color care agent.