초록 ▼

A method and apparatus provides for dispensing a liquid concentrate. The source pressure of a liquid diluent is changed by a boost pump (52) to bring the pressure of the diluent to an elevated pressure. The diluent then enters an aspirator assembly (10) wherein the concentrate and diluent are mixed

A method and apparatus provides for dispensing a liquid concentrate. The source pressure of a liquid diluent is changed by a boost pump (52) to bring the pressure of the diluent to an elevated pressure. The diluent then enters an aspirator assembly (10) wherein the concentrate and diluent are mixed to form a use solution. The dynamic pressure of the diluent entering the aspirator assembly (10) is sufficient so that the amount of concentrate delivered over time is more constant.

대표청구항 ▼

We claim: 1. A method of dispensing a liquid concentrate from a dispenser for a laundry based application, comprising: (a) providing a supply of liquid diluent at a source pressure; (b) increasing the source pressure to an elevated pressure, the elevated pressure is a differential pressure of 50 ps

We claim: 1. A method of dispensing a liquid concentrate from a dispenser for a laundry based application, comprising: (a) providing a supply of liquid diluent at a source pressure; (b) increasing the source pressure to an elevated pressure, the elevated pressure is a differential pressure of 50 psig or more; (c) passing the liquid diluent at the elevated pressure through a diluent inlet port of an aspirator; (d) placing a first liquid product in fluid communication with a first product inlet port; and (e) dispensing a first use solution from a mixture of the liquid diluent and the first liquid product, wherein the first use solution has a given concentration independent of the source pressure. 2. The method of claim 1, the dispenser having a first controllable valve to control flow through the first product inlet port, the method further comprising opening the first controllable valve for a predetermined time, wherein an amount of liquid product dispensed is independent of the source pressure. 3. The method of claim 2, the dispenser having an adjustable aspirator nozzle, the method further comprising adjusting the adjustable nozzle to control flow of the first liquid product. 4. The method of claim 2, the dispenser further having a second product inlet port, the method comprising: (a) placing a second product in fluid communication with the second product inlet port; (b) activating a second controllable valve to control flow through the second product inlet port; and (c) dispensing a second use solution from a mixture of the liquid diluent and the second liquid product. 5. The method of claim 1, wherein a boost pump is used to obtain the elevated pressure. 6. The method of claim 4, further comprising: (a) the first liquid product is chlorine delivered through a first passageway; (b) the second liquid product is an acid delivered through a second passageway; (c) the liquid diluent is water; (d) sizing the first and second passageway so as to have a combined use solution having a pH of 5.0 or greater when both the liquid products are being dispensed, since the first and second liquid products are dispensed at a constant rate independent of the source pressure. 7. A method of dispensing a liquid concentrate from a dispenser for a warewashing based application, comprising: (a) providing a supply of liquid diluent at a source pressure; (b) increasing the source pressure to an elevated pressure, the elevated pressure is a differential pressure of 50 psig or more; (c) passing the liquid diluent at the elevated pressure through a diluent inlet port of an aspirator; (f) placing a first liquid product in fluid communication with a first product inlet port; and (g) dispensing a first use solution from a mixture of the liquid diluent and the first liquid product, wherein the first use solution has a given concentration independent of the source pressure. 8. The method of claim 7, the dispenser having a first controllable valve to control flow through the first product inlet port, the method further comprising opening the first controllable valve for a predetermined time, wherein an amount of liquid product dispensed is independent of the source pressure. 9. The method of claim 8, the dispenser having an adjustable aspirator nozzle, the method further comprising adjusting the adjustable nozzle to control flow of the first liquid product. 10. The method of claim 7, the dispenser further having a second product inlet port, the method comprising: (a) placing a second product in fluid communication with the second product inlet port; (b) activating a second controllable valve to control flow through the second product inlet port; and (c) dispensing a second use solution from a mixture of the liquid diluent and the second liquid product. 11. The method of claim 7, wherein a boost pump is used to obtain the elevated pressure.