Movement reversal device, particularly for a dishwasher

• US 7,047,986 B2
• Filed: 06/21/2004
• Issued: 05/23/2006
• Est. Priority Date: 12/21/2001
• Status: Expired due to Term

• Current Assignee: BSH Hausgeraete GmbH (Robert Bosch GmbH)
• Original Assignee: BSH Bosch und Siemens Hausgerã¤Te GmbH (Robert Bosch GmbH)
• Inventors: Rosenbauer, Michael, Köther, Claus, Ertle, Roland
• Primary Examiner(s): Stinson, Frankie L.
• Application Number:
  US10/873,386
• Publication Number:
  US 20040226586A1
• Time in Patent Office: 701 Days
• Field of Search: 134/176, 134/179, 134/198, 134/200, 134/57.D, 134/56.D, 134/58.D
• US Class Current: 134/56.00D
• CPC Class Codes: A47L 15/4221 Arrangements for redirection of washing water, e.g. water diverters to selectively supply the spray arms A47L15/0078 takes precedence
• CPC Class Codes: A47L 15/4225 Arrangements or adaption of recirculation or discharge pumps
• CPC Class Codes: A47L 15/4289 Spray-pressure measuring or regulating arrangements nozzles A47L15/4278
• CPC Class Codes: A47L 2501/03 Water recirculation, e.g. control of distributing valves for redirection of water flow
• CPC Class Codes: A47L 2501/05 Drain or recirculation pump, e.g. regulation of the pump rotational speed or flow direction

Abstract

A movement reversal device is used in a dishwasher. The dishwasher has a washing receptacle and a hydraulic assembly provided with at least two spraying devices impinging upon goods to be washed with a fluid transported via a circulating pump. The transported fluid flows through the movement reversal device that contains at least two outlets for feeding different spraying devices. The outlets are opened or closed by a positioning element such that one or several or all outlets are open or closed one after another and/or continuously. In order to better influence the course of the wash cycle and to obtain an optimal washing effect corresponding to the degree of dirtiness of the goods to be washed, the characteristics of the hydraulic assembly and the characteristics of the circulating pump are simultaneously or alternately changed by the movement reversal device.

Claims

1. In combination with a dishwashing machine having a washing receptacle for receiving goods to be washed, a circulating pump for conveying a liquid and a hydraulic configuration with at least two spraying devices, a movement reversal device through which the liquid flows, the movement reversal device comprising:

a movement reversal device body having a positioning element and at least two outlets formed therein for supplying the liquid to different ones of the spraying devices, said two outlets being opened or closed by said positioning element, such that in each case either one of said two outlets or both of said two outlets being opened or closed alternately one after another and/or continuously, and a characteristic of the hydraulic configuration and a characteristic of the circulating pump being altered simultaneously or alternately, wherein the characteristic of the hydraulic configuration is altered by changing a through flow of the liquid through said movement reversal device body and the characteristic of the circulating pump is altered by regulating a speed of the circulating pump.

2. The movement reversal device according to claim 1, wherein said positioning element has at least two openings formed therein including a first opening and a second opening, said first opening having a different cross-section compared to a cross-section of said second opening.

3. The movement reversal device according to claim 2, wherein said cross-section of said first opening is smaller than said cross-section of said second opening.

4. The movement reversal device according to claim 3, wherein said first opening supplies the liquid to one of the spraying devices being an upper spraying device.

5. The movement reversal device according to claim 1, wherein said positioning element is a disc having at least two openings formed therein including a first opening and at least one second opening, said first opening having a smaller cross-section than said second opening.

6. The movement reversal device according to claim 5, wherein said second opening having a larger cross-section serves substantially to supply the liquid to one of the spraying devices being a lower spraying device, but alternatively can also serve to supply the liquid to another of the spraying devices being an upper spraying device as compared to the lower spraying device.

7. The movement reversal device according to claim 6, wherein said second opening is one of two second openings each having a larger cross section than said first opening, said second openings opposing one another on said disc and simultaneously supply the liquid to the upper spraying device and the lower spraying device.

8. The movement reversal device according to claim 1, wherein said positioning element has closed areas, which sit tight on said outlets in a locked position, each of said closed areas having a revolving sealing edge projecting up in a direction of said outlets.

9. The movement reversal device according to claim 8, wherein said positioning element has a further sealing edge surrounding said first opening and projecting up in a direction of said outlets.

10. The movement reversal device according to claim 1, wherein a speed of the circulating pump is lowered or raised in predetermined partial program segments of a washing cycle.

11. The movement reversal device according to claim 1, wherein a speed of the circulating pump is lowered or raised by a program sequence.

12. The movement reversal device according to claim 1, wherein said positioning element has, arranged in a clockwise progression, a first opening, a first closed area having a revolving sealing edge projecting in a direction of said outlets and operable to sit tight on a respective one of said outlets in a locked position, a second opening, and a second closed area having a revolving sealing edge projecting in a direction of said outlets and operable to sit tight on a respective one of said outlets in a locked position, said first opening having a smaller cross-section than said second opening.

13. The movement reversal device according to claim 1, wherein said positioning element has, arranged in a clockwise progression, a first opening, a first closed area having a revolving sealing edge projecting in a direction of said outlets and operable to sit tight on a respective one of said outlets in a locked position, a second opening, and a second closed area having a revolving sealing edge projecting in a direction of said outlets and operable to sit tight on a respective one of said outlets in a locked position, said positioning element being movable to selectively position said first opening over a respective one of said two outlets during a given period during which the liquid flows via said first opening into said respective outlet and said positioning element being movable to selectively position said second opening over said same respective outlet during another given period during which the liquid flows via said second opening into said respective outlet, said first opening having a different cross-section compared to a cross-section of said second opening such that said first opening has a lesser liquid throughput when positioned over said respective outlet as compared to said second opening when said second opening is positioned over said respective outlet.

14. The movement reversal device according to claim 1, wherein said positioning element has at least two openings formed therein including a first opening and a second opening, said positioning element being movable to selectively position said first opening over a respective one of said two outlets during a given period during which the liquid flows via said first opening into said respective outlet and said positioning element being movable to selectively position said second opening over said same respective outlet during another given period during which the liquid flows via said second opening into said respective outlet, said first opening having a different cross-section compared to a cross-section of said second opening such that said first opening has a lesser liquid throughput when positioned over said respective outlet as compared to said second opening when said second opening is positioned over said respective outlet.

15. A dishwashing machine, comprising:

a washing receptacle for receiving goods to be washed;

a circulating pump for conveying a liquid;

a hydraulic configuration with at least two spraying devices; and

a movement reversal device through which the liquid flows, said movement reversal device fluidically connected to said hydraulic configuration and receiving the liquid from the circulating pump, said movement reversal device having a positioning element and at least two outlets formed therein for supplying the liquid to different ones of said spraying devices, said two outlets being opened or closed by said positioning element, such that in each case either one of said two outlets or both of said outlets being opened or closed alternately one after another and/or continuously, and a characteristic of said hydraulic configuration and a characteristic of said circulating pump being altered simultaneously or alternately, wherein the characteristic of the hydraulic configuration is altered by changing a through flow of the liquid through said movement reversal device body and the characteristic of the circulating pump is altered by regulating a speed of the circulating pump.

16. The dishwashing machine according to claim 15, wherein said positioning element has at least two openings formed therein including a first opening and a second opening, said first opening having a different cross-section compared to a cross-section of said second opening.

17. The dishwashing machine according to claim 15, wherein said positioning element has, arranged in a clockwise progression, a first opening, a first closed area having a revolving sealing edge projecting in a direction of said outlets and operable to sit tight on a respective one of said outlets in a locked position, a second opening, and a second closed area having a revolving sealing edge projecting in a direction of said outlets and operable to sit tight on a respective one of said outlets in a locked position, said first opening having a smaller cross-section than said second opening.

18. The dishwashing machine according to claim 15, wherein said positioning element has, arranged in a clockwise progression, a first opening, a first closed area having a revolving sealing edge projecting in a direction of said outlets and operable to sit tight on a respective one of said outlets in a locked position, a second opening, and a second closed area having a revolving sealing edge projecting in a direction of said outlets and operable to sit tight on a respective one of said outlets in a locked position, said positioning element being movable to selectively position said first opening over a respective one of said two outlets during a given period during which the liquid flows via said first opening into said respective outlet and said positioning element being movable to selectively position said second opening over said same respective outlet during another given period during which the liquid flows via said second opening into said respective outlet, said first opening having a different cross-section compared to a cross-section of said second opening such that said first opening has a lesser liquid throughput when positioned over said respective outlet as compared to said second opening when said second opening is positioned over said respective outlet.