DISPENSER CONTROL SYSTEMS AND METHODS

• US 20090317311A1
• Filed: 01/31/2008
• Published: 12/24/2009
• Est. Priority Date: 02/01/2007
• Status: Abandoned Application

• Current Assignee: Diversey Incorporated (Sealed Air)
• Original Assignee: JohnsonDiversey, Inc
• Inventors: Miller, Erik, Cocking, Andrew J., Steed, Michael A.
• Application Number:
  US12/524,052
• Publication Number:
  US 20090317311A1
• Time in Patent Office: Days
• US Class Current: 422/261
• CPC Class Codes: A47L 15/0049 Detection or prevention of malfunction, including accident prevention arrangements to prevent clogging of filters A47L15/4208; safety arrangements for preventing water damage A47L15/421
• 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 15/4436 in the form of a detergent solution made by gradually dissolving a powder detergent cake or a solid detergent block
• CPC Class Codes: A47L 15/4463 Multi-dose dispensing arrangements
• CPC Class Codes: A47L 2401/30 Variation of electrical, magnetical or optical quantities
• CPC Class Codes: A47L 2501/07 Consumable products, e.g. detergent, rinse aids or salt
• CPC Class Codes: A47L 2501/26 Indication or alarm to the controlling device or to the user
• CPC Class Codes: D06F 2103/20 Washing liquid condition, e.g. turbidity
• CPC Class Codes: D06F 2105/42 Detergent or additive supply
• CPC Class Codes: D06F 33/37 of metering of detergents or additives
• CPC Class Codes: D06F 34/22 Condition of the washing liquid, e.g. turbidity
• CPC Class Codes: D06F 39/026 the powder or tablets being added directly, e.g. without the need of a flushing liquid

Abstract

A method of operating a dispensing system having a material delivery cycle. In some embodiments, the material delivery cycle includes supplying water to a receptacle, performing an operation intended to release a material into the water, and delivering the material to a downstream component. The first step of the method is to initiate the material delivery cycle. Next, a conductivity proximate to the receptacle is monitored. Additionally, one or more error conditions are identified during the material delivery cycle based at least partially on the monitored conductivity.

Claims

1. A method of operating a dispensing system having a material delivery cycle, wherein the material delivery cycle includes supplying water to a receptacle at least partially contained within the dispensing system, performing an operation intended to release a material into the water, and delivering the material to a downstream component, the method comprising:

initiating the material delivery cycle;

monitoring a conductivity proximate to the receptacle; and

identifying one or more error conditions during the material delivery cycle based at least partially on the monitored conductivity.

2. The method of claim 1, further comprising delivering the material to a washing machine that is positioned downstream of the dispensing system.

3. The method of claim 1, further comprising releasing a powder material or a granulated material into the water during the material delivery cycle.

4. The method of claim 1, further comprising operating a material metering device to release one or more doses of material into the water during the material delivery cycle.

5. The method of claim 1, wherein identifying the one or more error conditions includes comparing the monitored conductivity to one or more stored thresholds.

6. The method of claim 5, wherein comparing the monitored conductivity to one or more stored thresholds includes comparing the conductivity to a first threshold and a second threshold, the first threshold corresponding to the sum of a conductivity of the receptacle when the receptacle is relatively dry and a first offset value, the second threshold corresponding to the sum of a conductivity of the receptacle when the receptacle includes water and a second offset value.

7. The method of claim 6, further comprising identifying a blocked receptacle error condition during a first portion of the material delivery cycle if the monitored conductivity is greater than the second threshold.

8. The method of claim 6, further comprising identifying a blocked receptacle error condition prior to the operation intended to release the material being performed during the material delivery cycle if the monitored conductivity is greater than the second threshold.

9. The method of claim 6, further comprising identifying a no water error condition during the material delivery cycle if the monitored conductivity is not greater than the first conductivity.

10. The method of claim 6, further comprising identifying an out of material condition while the operation intended to release the material is being performed during the material delivery cycle if the monitored conductivity is not greater than the second threshold.

11. A dispensing system for delivering a material to a receiving component positioned downstream of the dispensing system, the dispensing system comprising:

a receptacle;

a valve configured to control a supply of water to the receptacle, the valve having an off position that prevents water from entering the receptacle and an on position that allows water to enter the receptacle;

a material metering device configured to dispense a material into the receptacle;

a sensor positioned proximate to the receptacle and configured to generate a first signal indicative of conductivity; and

a controller configured to receive the first signal from the sensor and to generate a valve control signal and a material metering device control signal, the valve control signal operable to toggle the valve between the on position and the off position, the material metering device control signal operable to initiate a dispensing of the material, the valve control signal and the material metering device signal being generated at least partially in response to a comparison by the controller of the first signal to one or more stored conductivity threshold values.

12. The dispensing system of claim 11, further comprising a condition indicator, wherein the condition indicator is configured to be in communication with the controller, and to indicate a delivery condition of the dispensing system.

13. The dispensing system of claim 12, wherein the condition indicator includes at least one of a visual indicator and an audible indicator.

14. The dispensing system of claim 11, wherein the controller is configured to store at least a first conductivity threshold value and a second conductivity threshold value.

15. The dispensing system of claim 11, wherein the controller is configured to communicate with one or more other monitoring or control systems.

16. A method of operating a dispensing system, the method comprising:

initiating a material delivery cycle having a pre-flush period, a material dosing period, and a post-flush period;

monitoring a first conductivity during the pre-flush period;

comparing the first conductivity to one or more thresholds, wherein the comparison is used to determine whether to initiate a material delivery during the material dosing period;

monitoring a second conductivity during the dosing period;

comparing the second conductivity to the one or more thresholds, wherein the comparison is used to determine whether material has been dispensed during the material dosing period;

monitoring a third conductivity during a post-flush period; and

comparing the third conductivity to the one or more thresholds, wherein the comparison is used to verify that the material delivered during the dosing period has been delivered to a receiving component positioned downstream of the dispensing system.

17. The method of claim 16, further comprising providing a dispensing system condition indicator, the dispensing system condition indicator operable to generate one or more error condition indications based on the comparison of the first conductivity, the second conductivity, and the third conductivity to the one or more thresholds.

18. The method of claim 17, further comprising generating an error condition indication after the pre-flush period if the first conductivity exceeds a maximum dry conductivity limit.

19. The method of claim 17, further comprising generating an error condition indication after the pre-flush period if the first conductivity does not exceed a water conductivity threshold.

20. The method of claim 17, further comprising stopping the material delivery cycle upon the one or more error condition indications being generated.