Methods and compositions for treating laundry items

• US 9,631,310 B2
• Filed: 05/12/2014
• Issued: 04/25/2017
• 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:
  US14/275,070
• Publication Number:
  US 20140259449A1
• Time in Patent Office: 1,079 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 method for wetting laundry in a laundry treating appliance having a rotatable treating chamber in which laundry is received for treatment according to an automatic cycle of operation comprises forming an annulus of laundry within the treating chamber prior to wetting the laundry, spraying liquid onto the annulus while the treating chamber is being rotated, after the formation of the annulus, redistributing the laundry, after the redistributing, rotating the treating chamber to form an annulus of laundry, and, while the treating chamber is rotated, recirculating the liquid through the laundry.

Claims

1. A method of wetting laundry in a laundry treating appliance having a rotatable treating chamber in which laundry is received for treatment according to an automatic cycle of operation and a recirculation system comprising a recirculation pump and at least one sprayer, the method comprising:

prior to the wetting the laundry, rotating the treating chamber to a satellizing speed to form a first annulus of laundry within the treating chamber;

wetting the laundry in the treating chamber by spraying liquid from the at least one sprayer onto the first annulus while the treating chamber is being rotated at a first satellizing speed that is insufficient to extract liquid by centrifugal force from the laundry at a rate great enough to satisfy the recirculation pump;

after the formation of the first annulus, redistributing the laundry by slowing a rotational speed of the treating chamber to a redistribution speed where at least a portion of the first annulus collapses;

after the redistributing, rotating the treating chamber to a second satellizing speed to form a second annulus of laundry within the treating chamber that is sufficient to extract liquid by centrifugal force from the second annulus of laundry to satisfy the recirculation pump; and

while the treating chamber is rotated at the second satellizing speed, recirculating the liquid through the laundry by spraying the liquid onto the second annulus, extracting the sprayed liquid from the laundry, and re-spraying the extracted liquid onto the second annulus.

2. The method of claim 1 further comprising slowing a rotational speed of the treating chamber from the second satellizing speed while continuing to recirculate the liquid.

3. The method of claim 2 wherein the slowing the rotational speed is continued until at least one of the following:

a) the pump can no longer spray the liquid through the at least one sprayer, b) until a predetermined speed is satisfied, c) a predetermined time has lapsed, d) a predetermined liquid level threshold in a sump of the laundry treating appliance is satisfied, or e) the rotational speed reaches a speed where the liquid is no longer extracted at a rate sufficient to satisfy the pump.

4. The method of claim 1 wherein the first and second satellizing speeds correspond to predetermined first and second centrifugal forces.

5. The method of claim 4 wherein the first centrifugal force corresponds to a 23 inch diameter treating chamber rotating at 250 rpm, and the second centrifugal force corresponds to a 23 inch diameter treating chamber rotating at 350 rpm.

6. The method of claim 1 wherein an amount of liquid used during the spraying has a maximum limit.

7. The method of claim 6 wherein the maximum limit is a function of an amount of the laundry.

8. The method of claim 7 wherein the maximum limit is at least one of:

a) 1.75 gallons for a load amount of 4 pounds or less, b) 2.27 gallons for a load amount of 8 pounds or less, but greater than 4 pounds, or c) 2.9 gallons for a load amount of 12 pounds or less, but greater than 8 pounds.

9. The method of claim 1 wherein the treating chamber is rotated about a horizontal axis.