Solid chemical product dilution control
First Claim
1. A system comprising:
- a container into which a target weight of a diluent required to prepare a requested amount of a use solution is dispensed;
a weighing device positioned to obtain container weight information concerning a weight of the container and any contents thereof; and
a controller that receives a dispense request specifying the requested amount of the use solution to be prepared and a requested concentration of a chemical product in the use solution, determines the target weight of the diluent required to prepare the requested amount of the use solution, determines a target weight of the chemical product to be dispensed required to prepare the requested amount of the use solution, and manages application of the diluent onto the chemical product until an amount of the use solution in the container satisfies the requested amount based on the container weight information,wherein the controller further initiates a spray on/off cycle including spraying the chemical product with at least some of the diluent from the container for a first predetermined period of time and stops the spraying of the solid chemical product for a second predetermined period of time, receives the container weight information, determines a weight of the use solution in the container from the container weight information, compares the difference between a target weight of the requested use solution and the weight of the use solution in the container with a threshold, and repeats the spray on/off cycle until the threshold is satisfied.
1 Assignment
0 Petitions
Accused Products
Abstract
A solid chemical product is dispensed to prepare a requested amount of a use solution having a requested concentration of the chemical product. In some examples, a target amount of a diluent and a target amount of the chemical product required to prepare the requested use solution are determined. The target amount of the diluent is dispensed into a container. At least some of the diluent in the container is applied to the solid chemical product to create a resultant use solution, which is directed back into the container. The diluent from the container is applied to the chemical product until the amount of the use solution in the container satisfies the requested amount. In some examples, the target amount of the diluent and the target amount of the chemical product are measured by weight.
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Citations
15 Claims
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1. A system comprising:
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a container into which a target weight of a diluent required to prepare a requested amount of a use solution is dispensed; a weighing device positioned to obtain container weight information concerning a weight of the container and any contents thereof; and a controller that receives a dispense request specifying the requested amount of the use solution to be prepared and a requested concentration of a chemical product in the use solution, determines the target weight of the diluent required to prepare the requested amount of the use solution, determines a target weight of the chemical product to be dispensed required to prepare the requested amount of the use solution, and manages application of the diluent onto the chemical product until an amount of the use solution in the container satisfies the requested amount based on the container weight information, wherein the controller further initiates a spray on/off cycle including spraying the chemical product with at least some of the diluent from the container for a first predetermined period of time and stops the spraying of the solid chemical product for a second predetermined period of time, receives the container weight information, determines a weight of the use solution in the container from the container weight information, compares the difference between a target weight of the requested use solution and the weight of the use solution in the container with a threshold, and repeats the spray on/off cycle until the threshold is satisfied. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system comprising:
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a container into which a target weight of a diluent required to prepare a requested amount of a use solution is dispensed; a weighing device positioned to obtain container weight information concerning a weight of the container and any contents thereof; and a controller that receives a dispense request specifying the requested amount of the use solution to be prepared and a requested concentration of a chemical product in the use solution, determines the target weight of the diluent required to prepare the requested amount of the use solution, determines a target weight of the chemical product to be dispensed required to prepare the requested amount of the use solution, and manages application of the diluent onto the chemical product until an amount of the use solution in the container satisfies the requested amount based on the container weight information, wherein the controller further; controls spraying of the chemical product with at least some of the diluent from the container; samples the container weight information; determines a weight of the use solution in the container from the container weight information; after a dynamic settling time has elapsed, determines a dispense rate corresponding to an amount of the chemical product dispensed per unit time based on a change in the weight of the use solution in the container; determines a dynamic target weight of the use solution in the container based on a target weight of the requested use solution; determines a dynamic cycle time based on the dynamic target and the dispense rate; and stops the spraying of the chemical product after the dynamic cycle time has elapsed. - View Dependent Claims (12, 13, 14, 15)
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Specification