Method of metering active substances in a dishwasher

• US 8,657,964 B2
• Filed: 11/14/2006
• Issued: 02/25/2014
• Est. Priority Date: 12/09/2005
• Status: Active Grant

• Current Assignee: Miele & CIE KG
• Original Assignee: Miele & CIE KG
• Inventors: Druecker, Markus, Kinnius, Joerg, Seifert, Monika, Wegener, Dirk, Wolf, Cornelius
• Primary Examiner(s): GOLIGHTLY, ERIC WAYNE
• Application Number:
  US12/096,707
• Publication Number:
  US 20090000644A1
• Time in Patent Office: 2,660 Days
• Field of Search: None
• US Class Current: 134/18
• 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 15/4418 in the form of liquids A47L15/4409, A47L15/4436, A47L15/4445 take precedence
• CPC Class Codes: A47L 15/4463 Multi-dose dispensing arrangements
• CPC Class Codes: A47L 2401/04 Crockery or tableware details, e.g. material, quantity, condition
• CPC Class Codes: A47L 2401/10 Water cloudiness or dirtiness, e.g. turbidity, foaming or level of bacteria
• CPC Class Codes: A47L 2501/07 Consumable products, e.g. detergent, rinse aids or salt

Abstract

A method for dispensing a liquid or pasty cleaning agent and a liquid or pasty bleaching agent into a wash tub of a household dishwasher that includes a housing and a dispensing system disposed in the housing. The dispensing system separately stores and discharges the cleaning agent and bleaching agent. The method includes providing the dispensing system with respective reservoirs for each of the cleaning agent and the bleaching agent that have different capacities from each other. Each of the capacities are larger than needed for a single wash cycle. A first quantity of the cleaning agent and a second quantity of the bleaching agent are dispensed during a wash cycle, and the ratio of the dispensed quantities corresponds to the ratio of the capacities of the respective reservoirs.

Claims

1. A method for dispensing a liquid or pasty cleaning agent and a liquid or pasty bleaching agent into a wash tub of a household dishwasher, the dishwasher including a housing and at least one dispensing system disposed in the housing and configured to separately store and discharge a cleaning agent and a bleaching agent, both the cleaning agent and bleaching agent being at least one of liquid and pasty, the method comprising:

providing the dispensing system with respective first and second reservoirs for each of the cleaning agent and the bleaching agent, the respective first and second reservoirs having different capacities from each other, each capacity being larger than a respective quantity for a single wash cycle;

providing the dispensing system with a first dispensing chamber downstream of the first reservoir and a second dispensing chamber downstream of the second reservoir;

filling the first dispensing chamber with a first quantity of the cleaning agent from the first reservoir, closing a passage between the first dispensing chamber and the first reservoir, and dispensing the first quantity of cleaning agent from the first dispensing chamber during a wash cycle, the first quantity being less than the capacity of the first reservoir; and

filling the second dispensing chamber with a second quantity of bleaching agent from the second reservoir, closing a passage between the second dispensing chamber and the second reservoir, and dispensing the second quantity of bleaching agent from the second dispensing chamber, the second quantity being less than the capacity of the second reservoir and a ratio of the first and second quantities being substantially equal to a ratio of the capacities of the respective first and second reservoirs.

2. The method as recited in claim 1 wherein at least one of the first and second quantities is dependent upon a selected cycle of the washing machine.

3. The method as recited in claim 1 wherein at least one of the first and second quantities is dependent upon a sensed parameter of an item to be washed.

4. The method as recited in claim 1 wherein at least one of the first and second quantities is dependent upon a sensed parameter of the wash water.

5. The method as recited in claim 1 wherein the dishwasher includes an appliance door configured to close the washing tub, the first and second reservoirs being disposed in an upper portion of the appliance door.

6. The method as recited in claim 1 wherein the first and second reservoirs are thermally insulated from the washing tub.