Dishwashing machine and method

Patent metadata

Field	Value
Publication number	US-11445883-B2
Application number	US-201716097341-A
Country	US
Kind code	B2
Filing date	Apr 20, 2017
Priority date	Apr 29, 2016
Publication date	Sep 20, 2022
Grant date	Sep 20, 2022

Abstract

The invention relates to a method of automatic dishwashing, comprising: placing soiled wares inside a cleaning volume; providing a first cleaning composition comprising a bleach and a second cleaning composition different from the first composition; and delivering the first composition and the second composition separately to the cleaning volume to contact the soiled wares, wherein: the first composition is delivered to the cleaning volume as a mist and the second composition is delivered to the cleaning volume as a jet; and the first and second compositions are delivered to the cleaning volume at a temperature below 100° C. The invention also relates to a dishwasher and a kit for use in the inventive method.

First claim

The invention claimed is:

1. A method of automatic dishwashing consisting of:
delivering a first cleaning composition comprising a bleach a cleaning volume to contact soiled wares and optionally subsequently draining the first cleaning composition from the cleaning volume;
delivering a first rinsing composition to the cleaning volume as a mist or a jet to contact the soiled wares after delivery of the first cleaning composition and optionally subsequently draining the first rinsing composition from the cleaning volume;
delivering a second cleaning composition different from the first cleaning composition separately to the cleaning volume to contact the soiled wares and optionally subsequently draining the second cleaning composition from the cleaning volume;
delivering a second rinsing composition to the cleaning volume as a mist or a jet after delivery of the second cleaning composition and optionally subsequently draining the second rinsing composition from the cleaning volume; and
optionally delivering a third rinsing composition to the cleaning volume after delivery of the second rinsing composition and optionally subsequently draining the first rinsing composition from the cleaning volume, wherein:
the first cleaning composition is delivered to the cleaning volume as a mist and the second cleaning composition is delivered to the cleaning volume as a jet;
the first and second cleaning compositions are delivered to the cleaning volume at a temperature below 100° C.;
the second cleaning composition is bleach-free and comprises at least one enzyme, the enzyme selected from the group consisting of an amylase, protease, cellulose, pectinase, mannanase, lipase, lipoxygenase, tannase, laccase, peroxygenase, and gluco-oxygenase,
the first cleaning composition is delivered at a lower momentum than the second cleaning composition,
the ratio of momentum between the first and second cleaning compositions is at least 1:3,
the first cleaning composition is delivered with a lower mass flow rate than the second cleaning composition,
the ratio of mass flow rate between the first and second cleaning compositions is at least 1:3, and
the cleaning volume is 3 L,
the first cleaning composition is delivered with a mean particle size of from 5 to 500 microns and/or the first cleaning composition has a DV(10) of 35 microns, and
one or both of the first and second rinsing compositions comprise a non-ionic surfactant.

2. The method of claim 1 , wherein
a density of a mist plume of the first cleaning composition is lower than a density of the jet of the second cleaning composition.

3. The method of claim 1 , wherein one or more of:
the at least one rinsing composition is delivered as a mist;
the at least one rinsing composition is delivered after delivering the first and second cleaning compositions; and
the at least one rinsing composition is delivered between the delivery of the first and cleaning second compositions.

4. The method of claim 1 , wherein the first cleaning composition is delivered to an area of the cleaning volume located above the soiled wares.

5. The method of claim 1 , wherein a density of a mist plume of the first cleaning composition is lower than a density of the jet of the second cleaning composition; and
the ratio of density between the first and second cleaning compositions is at least 1:3.

6. The method of claim 1 , wherein the first cleaning composition is delivered to the cleaning volume prior to the delivery of the second cleaning composition.

Assignees

• Reckitt Benckiser Finish Bv

Inventors

• Buogo Alberto
• Couser Callum
• Dierkes Frank
• Pflug Jorg
• Mohrhard Karl-Heinz
• Rigobert Caroline

Classifications

• A47L15/00 Primary

  Washing or rinsing machines for crockery or tableware · CPC title

• C11D3/3947

  Liquid compositions · CPC title

• A47L15/0007 Primary

  Washing phases · CPC title

• C11D3/386

  Preparations containing enzymes {, e.g. protease or amylase} · CPC title

• A47L15/0055 Primary

  Metering or indication of used products, e.g. type or quantity of detergent, rinse aid or salt; for measuring or controlling the product concentration · CPC title