DISPENSING SYSTEM FOR LIQUID OR VISCOUS TREATING AGENTS FOR USE IN A WASHING MACHINE, AND WASHING MACHINE

• US 20090100881A1
• Filed: 10/21/2008
• Published: 04/23/2009
• Est. Priority Date: 10/23/2007
• Status: Active Grant

• Current Assignee: Miele & CIE KG
• Original Assignee: Miele & CIE KG
• Inventors: Dahlke, Dirk
• Granted Patent: US 8,171,757 B2
• Time in Patent Office: Days
• US Class Current: 68/17.R
• CPC Class Codes: D06F 39/022 in a liquid state D06F39/024 takes precedence

Abstract

A dispensing system for a liquid or viscous treating agent for use with a washing machine with a suds container configured to receive wash liquid. The dispensing system includes a dispenser box in communication with a water feed line. The dispenser box is configured to dispense treating agents to the suds container by flushing the treating agents out from the dispenser box. A receiving compartment is disposed in the dispenser box and is configured to receive a cartridge for holding a supply of the liquid or viscous treating agent. A dosing device configured to dispense the treating agent from the cartridge to the suds container is included in the dispensing system. The dosing device includes a linear displacement pump disposed on the cartridge. The linear displacement pump is configured to dispense a substantially constant volume of the treating agent from the cartridge with each stroke. The substantially constant volume of treating agent is a fraction of a total volume of treating agent for dispensing.

Claims

1. A dispensing system for a liquid or viscous treating agent for use with a washing machine including a suds container configured to receive wash liquid, the dispensing system comprising:

a dispenser box in communication with a water feed line and configured to dispense treating agents to the suds container by flushing the treating agents out from the dispenser box;

a receiving compartment disposed in the dispenser box and configured to receive a cartridge for holding a supply of the liquid or viscous treating agent; and

a dosing device configured to dispense the treating agent from the cartridge to the suds container, the dosing device including a linear displacement pump disposed on the cartridge, the linear displacement pump being configured to dispense a substantially constant volume of the treating agent from the cartridge with each stroke,

wherein the substantially constant volume of treating agent is a fraction of a total volume of treating agent for dispensing.

2. The dispensing system as recited in claim 1 wherein the treating agent is at least one of a detergent and an additive.

3. The dispensing system as recited in claim 1 wherein the linear displacement pump and cartridge form a unit.

4. The dispensing system as recited in claim 1 wherein the dosing device includes an electrically powered actuator configured to impart linear movement to the linear displacement pump.

5. The dispensing system as recited in claim 4 wherein the electrically powered actuator includes an electric motor and a screw drive.

6. The dispensing system as recited in claim 4 wherein the electrically powered actuator includes an electrically operated solenoid.

7. The dispensing system as recited in claim 1 where in the cartridge is fixed to a retaining plate in the receiving compartment with a retaining device.

8. The dispensing system as recited in claim 7 wherein the retaining device includes a short tubular member attached to one of the cartridge and linear displacement pump, the short tubular member including a slit, the short tubular member being insertable into a recess disposed in the retaining plate so as to fix in place the cartridge and linear displacement pump within the receiving compartment.

9. The dispensing system as recited in claim 1 further comprising a removable drawer configured to be pulled out from the dispenser box, the drawer including the receiving compartment for the cartridge.

10. The dispensing system as recited in claim 4 further comprising a removable drawer configured to be pulled out from the dispenser box, the drawer including the receiving compartment for the cartridge.

11. The dispensing system as recited in claim 10 further comprising a movable retainer connected to the electrically powered actuator such that the drawer is secured in the dispenser box when the electrically powered actuator is activated and removable when the electrically powered actuator is not activated.

12. The dispensing system as recited in claim 11 wherein the retainer is pivotally disposed on a rear wall of the dispenser box and an underside of the retainer includes a projection having a slant, and wherein a pressure plate that is moveable by the actuator is operatively connected to the projection such that the retainer is configured to be lowered when the actuator is activated thereby securing the drawer in a retracted position.

13. The dispensing system as recited in claim 11 wherein the retainer is pivotally disposed on a rear wall of the dispenser box and an underside of the retainer includes a projection having a slant, and wherein a pressure plate that is moveable by the actuator is operatively connected to the projection such that the retainer is configured to be disposed in a lifted position when the actuator is not activated such that the drawer is removable.

14. The dispensing system as recited in claim 1 wherein one or more strokes of the linear displacement pump corresponds to a wash cycle of the washing machine.

15. The dispensing system as recited in claim 14 wherein the substantially constant volume of treating agent is in a range of 3 ml to 10 ml.

16. The dispensing system as recited in claim 1 wherein the cartridge has a capacity in a range of 250 ml to 1500 ml.

17. The dispensing system as recited in claim 1 the cartridge has an outer shape matching an inner shape of the receiving compartment.

18. A washing machine comprising:

a housing;

a suds container disposed in the housing and configured to receive wash liquid;

a dispensing system disposed in an upper portion of the housing and configured for use with a liquid or viscous treating agent, the dispensing system comprising;

a dispenser box in communication with a water feed line and configured to dispense treating agents to the suds container by flushing the treating agents out from the dispenser box;

a receiving compartment disposed in the dispenser box and configured to receive a cartridge for holding a supply of the liquid or viscous treating agent; and

a dosing device configured to dispense the treating agent from the cartridge to the suds container, the dosing device including a linear displacement pump disposed on the cartridge, the linear displacement pump being configured to dispense a substantially constant volume of the treating agent from the cartridge with each stroke, the substantially constant volume of treating agent being a fraction of a total volume of treating agent for dispensing; and

a controller configured to control the dispensing system.

19. A dispensing system for a liquid or viscous treating agent for use with a washing machine including a suds container configured to receive wash liquid, the dispensing system comprising:

a dispenser box in communication with a water feed line and configured to dispense the treating agent to the suds container by flushing the treating agent out from the dispenser box;

a receiving compartment disposed in the dispenser box and configured to receive a cartridge for holding a supply of the liquid or viscous treating agent; and

a dosing device configured to dispense the treating agent from the cartridge to the suds container, the dosing device including an electrically powered actuator configured to impart linear movement to a linear displacement pump disposed on the cartridge.

20. The dispensing system as recited in claim 19, wherein the electrically powered actuator includes at least one of an electrically operated solenoid and a drive unit including an electrically powered motor and a screw drive.