Control system and method for supplying detergent and other fluids to multiple washing machines

• US 20040098811A1
• Filed: 09/22/2003
• Published: 05/27/2004
• Est. Priority Date: 11/25/2002
• Status: Active Grant

• Current Assignee: Mac-Gray Services Incorporated (CSC Serviceworks, Inc.)
• Original Assignee: Mac-Gray Services Incorporated (CSC Serviceworks, Inc.)
• Inventors: Tuttle, Robert J., Souza, William J.
• Granted Patent: US 7,725,970 B2
• Time in Patent Office: Days
• US Class Current: 8/158
• CPC Class Codes: D06F 2101/00 User input for the control of domestic laundry washing machines, washer-dryers or laundry dryers
• CPC Class Codes: D06F 2103/16 Washing liquid temperature
• CPC Class Codes: D06F 2103/22 Content of detergent or additives
• CPC Class Codes: D06F 2103/38 Time, e.g. duration
• CPC Class Codes: D06F 2105/42 Detergent or additive supply
• CPC Class Codes: D06F 2105/58 Indications or alarms to the control system or to the user
• CPC Class Codes: D06F 33/37 of metering of detergents or additives
• CPC Class Codes: D06F 34/05 for wireless communication between components, e.g. for remote monitoring or control
• CPC Class Codes: D06F 39/022 in a liquid state D06F39/024 takes precedence
• CPC Class Codes: D06F 95/00 Laundry systems or arrangements of apparatus or machines; Mobile laundries D06F31/00 takes precedence

Abstract

A washing machine control system is combined with a working fluid dispensing system and a payment processing system to provide a merged system for automatically providing detergents, bleach, softeners and the like in a pay-as-you-go laundry environment, such as public laundry facilities in Laundromats, dormitories, apartment complexes and the like.

Claims

1. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, comprising:

a centralized fluid distribution system for dispensing a metered amount of working fluid to each of said multiple washing machines;

a dispensing controller for controlling said centralized fluid distribution system according to a predetermined dispensing sequence;

a washing sequence controller at each of said washing machines, connected to independently operate a washing machine according to a selected washing sequence;

a payment processor constructed to receive and approve a payment medium presented by the user according to a predetermined payment sequence;

a system controller connected to said payment processor, said washing sequence controller, and said dispensing controller to receive inputs therefrom and to generate and control signals thereto according to a predetermined control sequence.

2. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 1, wherein a user interface is operatively connected to said system controller to allow the user to make selections in response to prompts from said system controller.

3. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 1, wherein said system controller is connected to the multiple washing machines through a gang controller which monitors the status of the washing machines and controls said washing machine controllers.

4. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 1, wherein said centralized fluid distribution system comprises:

at least one tank for holding a working fluid;

a pump for moving working fluid downstream from said tank under pressure into a distribution conduit;

a distribution manifold connected to receive working fluid pumped from said tank and distribute said fluid to multiple conduits connected to said multiple washing machines;

a valve connected in each of said washing machine conduits to control the flow of working fluid therein; and

wherein said pump and said valve are controlled by signals from said dispensing controller to dispense a metered amount of working fluid according to a predetermined dosage

5. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 4, wherein said centralized fluid distribution system further comprises a system of sensors for monitoring the flow continuity of said fluid distribution system.

6. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 5, wherein said system of sensors comprises a first flow sensor connected in said distribution conduit downstream of said pump for generating a first signal indicative of the flow of working fluid therein, said first signal being sent to said dispensing controller.

7. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 6, wherein said system of sensors further comprises a second flow sensor connected in said distribution conduit downstream of said valve for generating a second signal indicative of the flow of working fluid therein, said second signal being sent to said dispensing controller.

8. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 4, wherein said centralized fluid distribution system further comprises a temperature sensor for sensing the temperature of said working fluid and sending a signal indicative thereof to said dispensing controller.

9. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 8, wherein said temperature sensor is positioned to sense the temperature of the working fluid in said distribution manifold.

10. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 4, wherein said centralized fluid distribution system further comprises at least a second tank for holding a second working fluid wherein said second tank is connected to:

a second pump for moving working fluid downstream from said second tank under pressure into a second distribution conduit;

a second distribution manifold connected to receive said second working fluid pumped from said second tank and distribute said second fluid to second multiple conduits connected to said multiple washing machines;

a second valve connected in each of said second washing machine conduits to control the flow of said second working fluid therein; and

wherein said second pump and said second valve are controlled by signals from said dispensing controller to dispense a metered amount of said second working fluid according to a predetermined dosage.

11. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 4, wherein said tank includes a level sensor to monitor the supply of working fluid therein.

12. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 1, wherein said payment processor comprises a card reader to receive a payment card from said user, said payment processor being in communication with a remote transaction authorization system.

13. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 1, wherein said payment processor comprises a card reader to receive a stored-value payment card from said user and to deduct the payment from the balance stored on the card.

14. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 1, wherein said payment processor comprises a mechanism for accepting cash payments.

15. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 1, further comprising a first algorithm operatively associated with said system controller and wherein said first algorithm causes said system controller to activate said dispensing system control processor in response to acceptance of said payment medium by said payment processor.

16. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 15, wherein said first algorithm causes said system controller to prompt said user, through said user interface, to select one of said multiple washing machines and to check the status of the selected washing machine in response to said user'"'"'s selection.

17. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 16, wherein said first algorithm further causes said system controller to check the supply of working fluids and prompt said user, through said user interface, to select only those said working fluids that are currently available.

18. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 1, wherein said dispensing controller further comprises a second algorithm operatively associated with said dispensing controller and wherein said second algorithm causes said dispensing controller to activate said pump for a predetermined interval, prior to dispensing, to allow said working fluid to fill said fluid distribution system to the valve associated with the selected washing machine in response to a signal from said system controller.

19. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 18, wherein said second algorithm causes said dispensing controller to vary the fill interval according to the working fluid being dispensed.

20. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 18, wherein said second algorithm causes said dispensing controller to open said valve for a predetermined period to dispense a metered dosage of working fluid to the selected washing machine after the expiration of said fill interval.

21. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 18, wherein said second algorithm causes said dispensing controller to check the continuity of the fluid distribution system during dispensing of working fluid.

22. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 18, wherein said second algorithm causes said dispensing controller to adjust the open time of the valve according to the temperature of the working fluid.

23. In a system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, a method for dispensing working fluid comprising the steps of:

prompting the user to present a payment medium;

prompting the user to select a washing machine and verifying the available status thereof;

activate the selected washing machine;

sensing the availability of working fluid for dispensing in a reservoir for said working fluid;

prompting the user to select a working fluid;

processing a transaction according to the selections made by the user to verify authenticity of the payment medium and authorize payment; and

dispensing a metered dosage of the selected working fluid to the selected washing machine; and

24. In a system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, a method for dispensing working fluid, according to claim 23, further comprising the step of monitoring the availability of working fluid by counting the number of dosages dispensed.

25. In a system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, a method for dispensing working fluid, according to claim 23, further comprising the step of monitoring the availability of working fluid by sensing the level of working fluid in the reservoir for said working fluid.

26. In a system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, a method for dispensing working fluid, according to claim 23, wherein the step of dispensing a metered dosage of the selected working fluid to the selected washing machine further comprises the steps of:

activating a pump to fill a distribution manifold with the selected working fluid;

connecting the manifold to the selected washing machine through a conduit;

controlling the flow of working fluid in the conduit by means of a valve;

opening said valve to allow working fluid to flow to said washing machine for a predetermined time in order to deliver a predetermined dosage of the selected working fluid.

27. In a system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, a method for dispensing working fluid, according to claim 25, further comprising the step of delaying the opening of the valve for a predetermined fill interval to allow the working fluid to establish a flow in the manifold and conduit.

28. In a system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, a method for dispensing working fluid, according to claim 27, wherein the step of opening said valve to allow working fluid to flow to said washing machine for a predetermined time further comprises the steps of:

checking the temperature of the working fluid; and

adjusting the fill interval according to said temperature.

29. In a system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, a method for dispensing working fluid, according to claim 23, further comprising the step of checking the continuity of the working fluid flow path through the manifold and conduit.

30. In a system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, a method for dispensing working fluid, according to claim 29, wherein the step of checking the continuity of the working fluid flow path through the manifold and conduit is accomplished by placing at least one flow sensor in the working fluid flow path and monitoring the signals from said flow sensor.

31. In a system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, a method for dispensing working fluid, according to claim 29, further comprising the step of checking the continuity of the working fluid flow path through the manifold and conduit by monitoring the activation time period of the pump and setting a maximum run time indicative of failed continuity.

32. In a system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, a method for dispensing working fluid, according to claim 28, wherein the sensing of the temperature is delayed for a predetermined interval to allow the temperature to reach equilibrium.

33. In a system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, a method for dispensing working fluid, according to claim 32, wherein temperature equilibrium is determined by sensing the temperature of the working fluid in the reservoir and in the manifold and determining equilibrium when said sensed temperatures are equal.

34. In a system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, a method for dispensing working fluid, according to claim 27, wherein the fill interval is adjusted depending on the selected washing machine to accommodate different lengths of flow paths for the washing machines.

35. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, comprising:

a centralized fluid distribution system for dispensing a metered amount of working fluid to each of said multiple washing machines;

a dispensing controller for controlling said centralized fluid distribution system according to a predetermined dispensing sequence;

a washing sequence controller at each of said washing machines, connected to independently operate a washing machine according to a selected washing sequence;

a system controller at each of said washing machines, connected to said washing sequence controller, and said dispensing controller to receive inputs therefrom and to generate and control signals thereto according to a predetermined control sequence; and

further wherein said centralized fluid distribution system comprises;

at least one tank for holding a working fluid;

a pump for moving working fluid downstream from said tank under pressure into a distribution conduit;

a distribution manifold connected to receive working fluid pumped from said tank and distribute said fluid to multiple conduits connected to said multiple washing machines;

a valve connected in each of said washing machine conduits to control the flow of working fluid therein; and

wherein said pump and said valve are controlled by signals from said dispensing controller to dispense a metered amount of working fluid according to a predetermined dosage.

36. A system for controlling the operation of a pay-as-you-go laundry facility that includes multiple washing machines using at least one working fluid, as described in claim 35 further comprising a payment processor constructed to receive and approve a payment medium presented by the user according to a predetermined payment sequence.