Dishwasher and method for operating a dishwasher

• US 20040238015A1
• Filed: 06/21/2004
• Published: 12/02/2004
• Est. Priority Date: 12/21/2001
• Status: Active Grant

• Current Assignee: BSH Hausgeraete GmbH (Robert Bosch GmbH)
• Original Assignee: BSH Bosch und Siemens Hausgerã¤Te GmbH (Robert Bosch GmbH)
• Inventors: Rieger, Roland, Rosenbauer, Michael, Beer, Hans
• Granted Patent: US 8,512,477 B2
• Time in Patent Office: Days
• US Class Current: 134/34
• CPC Class Codes: A47L 15/0002 Washing processes, i.e. machine working principles characterised by phases or operational steps
• CPC Class Codes: A47L 15/0044 Operation time reduction
• CPC Class Codes: A47L 15/0052 Noise reduction
• CPC Class Codes: A47L 2501/03 Water recirculation, e.g. control of distributing valves for redirection of water flow
• CPC Class Codes: A47L 2601/02 Pressurised cleaning liquid delivered by a pump

Abstract

A dishwasher and a method for operating a dishwasher reduce the length of a washing cycle in a dishwasher as well as the noise which is generated by the impact of the water therein, without altering the performance of the dishwasher. The washing method for a dishwasher having at least two spray devices includes dividing a significant period of time of a washing program duration into a plurality of different lengths of sub-units of time. Substantially every sub-unit of time is made up of at least two time sections. During a first time section, the washing liquid passes through all of the spray devices and during a second time section, the liquid only passes through the lowermost or the uppermost spray device. A dishwasher having at least two spray devices carries out the washing method.

Claims

1. A method for operating a dishwasher, which comprises the following steps:

providing at least two spray devices including a lowermost spray device and an uppermost spray device;

dividing a time period of a dishwashing-program duration into a multiplicity of sub-units of time of different lengths;

dividing each of the sub-units of time into at least first and second time sections;

passing a flow of dishwashing liquid through all of the spray devices during the first time section; and

passing a flow of dishwashing liquid through only the lowermost spray device or the uppermost spray device during the second time section.

2. The method for operating a dishwasher according to claim 1, which further comprises providing one of the sub-units of time with two time sections in which action of the lowermost spray device and the uppermost spray device alternates.

3. The method for operating a dishwasher according to claim 1, wherein all of the time sections have substantially equal length.

4. The method for operating a dishwasher according to claim 2, wherein all of the time sections have substantially equal length.

5. The method for operating a dishwasher according to claim 1, wherein the time sections have different lengths.

6. The method for operating a dishwasher according to claim 2, wherein the time sections have different lengths.

7. A dishwasher, comprising:

at least two spray devices; and

a program-control subassembly associated with said at least two spray devices for carrying out the method for operating a dishwasher according to claim 1.