Method for operating a water-conducting domestic appliance

• US 8,961,699 B2
• Filed: 08/29/2007
• Issued: 02/24/2015
• Est. Priority Date: 09/19/2006
• Status: Active Grant

• Current Assignee: BSH Hausgeraete GmbH (Robert Bosch GmbH)
• Original Assignee: BSH Bosch und Siemens Hausgerã¤Te GmbH (Robert Bosch GmbH)
• Inventors: Classen, Egbert, Fauth, Michael, Heiligenmann, Caroline, Jerg, Helmut, Paintner, Kai
• Primary Examiner(s): Carrillo, Bibi
• Application Number:
  US12/311,092
• Publication Number:
  US 20090314313A1
• Time in Patent Office: 2,736 Days
• Field of Search: 134/25.2, 134 26- 29, 134 56 R- 58 DL
• US Class Current: 134/25.2
• CPC Class Codes: A47L 15/0007 Washing phases
• CPC Class Codes: A47L 15/0015 other treatment phases, e.g. steam or sterilizing phase
• CPC Class Codes: A47L 15/0055 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 Class Codes: A47L 15/4236 Arrangements to sterilize or disinfect dishes or washing liquids A47L15/4234 takes precedence
• CPC Class Codes: A47L 15/44 Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
• CPC Class Codes: A47L 2401/10 Water cloudiness or dirtiness, e.g. turbidity, foaming or level of bacteria
• CPC Class Codes: A47L 2401/30 Variation of electrical, magnetical or optical quantities
• CPC Class Codes: A47L 2501/07 Consumable products, e.g. detergent, rinse aids or salt

Abstract

A method for operating a water-conducting domestic appliance, including a domestic dishwasher, wherein the water-conducting domestic appliance includes a program controller for performing a plurality of sequential program steps and the program controller operatively interacts with at least a detergent-dosing system, the method including the step of adding at least one cleaning substance having a function during at least one program step.

Claims

1. A method for operating a water-conducting domestic appliance, wherein the water-conducting domestic appliance includes a program controller for performing a plurality of sequential program steps and the program controller operatively interacts with at least a detergent-dosing system, the method comprising a first program step including a cleaning phase in which an alkali carrier together with at least one of a first dispersing substance and a first complexing substance are added, the cleaning phase including at least two enzymes added at times separated by a time interval, the method comprising a second program step of clear rinsing in which at least one of a second dispersing substance and a second complexing substance are added, and after adding the at least one of the second dispersing substance and the second complexing substance, a bleach, a bleach activator and a surfactant are added in separate applications.

2. The method according to claim 1 wherein at least one of the at least two enzymes is operable to break down at least one of starch compounds and polysaccharides.

3. The method according to claim 1 wherein at least one of the at least two enzymes is operable to break down at least one of proteins and peptides.

4. The method according to claim 1 wherein at least one of the at least two enzymes is operable to break down fatty compounds.

5. The method according to claim 1 further comprising adding at least partially complex alkaline earth ions.

6. The method according to claim 1 wherein at least one program step is executed under sensor control.

7. The method according to claim 1 wherein the first program step includes a pre-wash program step, which comprises adding at least one of the at least two enzymes and a surfactant.

8. The method according to claim 1 wherein the method includes an intermediate wash program step wherein another alkali carrier and at least one of another dispersing substance and another complexing substance are added.

9. The method according to claim 1 wherein the clear rinsing program step includes adding an additional alkali carrier.

10. The method according to claim 1 wherein the method includes a disinfecting program step.

11. The method according to claim 1 wherein the first program step includes adding a biocidal fluid.

12. The method according to claim 1 wherein at least one of the first program step and second program step includes adding a glass-protecting corrosion inhibitor.

13. The method according to claim 12 wherein the first program step includes adding the glass-protecting corrosion inhibitor containing at least zinc salt.

14. The method according to claim 12 wherein the second program step includes adding the glass-protecting corrosion inhibitor.

15. The method according to claim 12 wherein the alkali carrier in the first program step is sodium hydroxide, which functions to increase a pH value, and wherein the first program step includes adding the glass-protecting corrosion inhibitor after a time interval with respect to adding the sodium hydroxide, adding the at least two enzymes, and adding the first complexing substance.

16. A method for operating a water-conducting domestic appliance, wherein the water-conducting domestic appliance includes a program controller for performing a plurality of sequential program steps and the program controller operatively interacts with at least a detergent-dosing system for adding materials to a wash liquor, the method comprising:

adding, in a pre-wash phase, an alkali carrier together with at least one of a first dispensing substance and a first complexing substance to the wash liquor, then

performing a cleaning phase in three stages, wherein a first stage comprises adding an enzyme amylase, a second stage, after a first time interval from the first stage, comprises adding an enzyme protease, and a third stage, after a second time interval from the second stage, comprises adding a second alkali carrier;

then

circulating the wash liquor in a wash phase; and

then

performing a rinse phase in multiple stages including adding at least one of a second dispensing substance and a second complexing substance, then subsequently adding a bleaching agent, then subsequently adding a bleach activator, and then subsequently adding a non-ionic surfactant.