Method and apparatus for generating oxygenated water

• US 5,728,287 A
• Filed: 10/31/1996
• Issued: 03/17/1998
• Est. Priority Date: 10/31/1996
• Status: Expired due to Fees

• Current Assignee: H2o Technologies Ltd.
• Original Assignee: H2O Technologies, LLC
• Inventors: Carlson, David V., Hough, Gary S.
• Primary Examiner(s): Phasge, Arun S.
• Application Number:
  US08/744,708
• Time in Patent Office: 502 Days
• Field of Search: 205/742, 205/743, 204/229, 204/269, 204/275
• US Class Current: 205/743
• CPC Class Codes: C02F 1/008 Control or steering systems not provided for elsewhere in subclass C02F
• CPC Class Codes: C02F 1/46104 Devices therefor; Their operating or servicing
• CPC Class Codes: C02F 1/4672 by electrooxydation
• CPC Class Codes: C02F 1/727 using pure oxygen or oxygen rich gas
• CPC Class Codes: C02F 2001/46152 characterised by the shape or form electrodes in particulate form or with conductive or non-conductive particles between them C02F1/46114
• CPC Class Codes: C02F 2201/4611 Fluid flow
• CPC Class Codes: C02F 2201/46145 Fluid flow
• CPC Class Codes: C02F 2209/006 comprising a software program or a logic diagram
• CPC Class Codes: C02F 2209/22 O2
• CPC Class Codes: C02F 2301/08 Multistage treatments, e.g. repetition of the same process step under different conditions

Abstract

A method and apparatus for generating oxygenated water are shown and described. A plurality of electrolytic cells are coupled to each other and to a source of water. A volume of water is drawn from the source, and forced through at least one of the electrolytic cells at a user desired flow rate. If the demanded rate of flow at the outlet exceeds a threshold flow rate through the electrolytic cell, a valve is opened and an additional volume of water flows through the second electrolytic cell to the discharge, the rate of flow through each electrolytic cell not exceeding the selected value. Additional cells are added as needed. A varying demand of oxygenated water is therefore met, while ensuring that the dissolved oxygen content of the water at the outlet does not fall below a selected value.

Claims

1. An apparatus for generating a volume of oxygenated water, comprising:

a source of water under pressure;

an outlet through which the water is delivered to the user at a user selected flow rate;

a plurality of electrolytic cells coupled between said source of water and said outlet, such that a volume of water drawn from the source of water through the outlet passes through at least one electrolytic cell at the user selected flow rate;

a flow meter coupled to measure the flow rate of the water;

control means for causing the water to pass through one or more additional electrolytic cells if the flow rate as measured by said flow meter exceeds a threshold flow rate; and

an electric power source for providing electric power to energize said electrolytic cells through which water is passing.

2. The apparatus according to claim 1 wherein the plurality of electrolytic cells are coupled together in a parallel arrangement.

3. The apparatus according to claim 1 wherein a valve is positioned between two successive electrolytic cells, the valve being closed if the user selected flow rate does not exceed the threshold flow rate, the volume of water flowing through a first energized electrolytic cell to the outlet, the valve being opened if the user selected flow rate exceeds the threshold flow rate, thereby allowing water to flow through more than one energized electrolytic cell to the outlet.

4. The apparatus according to claim 3 wherein the control means further includes an electronic control system coupled to the flow meter and to each valve.

5. The apparatus according to claim 3 wherein the plurality of electrolytic cells are coupled together in a parallel arrangement, and a conduit is provided between an outlet of a first electrolytic cell and the inlet of the next electrolytic cell, the conduit being provided with a second valve, a third valve being provided downstream of the electrolytic cell and the conduit, the valves being selectively opened and closed to allow water to flow through the electrolytic cells in series, in parallel, or in both.

6. The apparatus according to claim 1 wherein each electrolytic cell contains a plurality of electrodes having a length of 6-12 inches and a width of 1.5-2 inches, the electrodes being coupled to a source of current of 1-20 amperes, the selected rate of flow through each electrolytic cell being 0.25-25 gallons per minute.

7. The apparatus according to claim 1, further comprising a pump in fluid communication with the source of water.

8. The apparatus according to claim 1 wherein said control means includes an electronic control system coupled to said electrolytic cells.

9. The apparatus according to claim 1, further comprising a dissolved oxygen meter provided downstream of the electrolytic cells.

10. The apparatus according to claim 1 wherein a valve is positioned at an inlet and at an outlet of each electrolytic cell, the valves being selectively opened and closed to direct or block the flow of water through a given electrolytic cell.

11. The apparatus according to claim 1 wherein the plurality of electrolytic cells are coupled together in series, such that water flowing from the source of water passes through the length of each successive electrolytic cell prior to being discharged at the outlet.

12. The apparatus according to claim 11, further comprising an electronic control system coupled to the flow meter and to the electrolytic cells, the control system energizing and de-energizing the electrolytic cells as necessary to maintain a desired level of dissolved oxygen in the water at the outlet.

13. A method for generating a volume of oxygenated water, comprising:

drawing a flow of water at a user selected flow rate from a source of water under pressure;

passing the flow of water through a first energized electrolytic cell;

measuring the flow rate of the water;

comparing the measured flow rate to a threshold flow rate;

opening a valve positioned between the source of water and a second energized electrolytic cell if the measured flow rate exceeds the threshold flow rate; and

passing the flow of water through the second energized electrolytic cell such that water flows through both the first and second energized electrolytic cells.

14. The method according to claim 13, further comprising:

comparing the user selected flow rate to a second threshold flow rate; and

passing the flow of water through a third, energized electrolytic cell to ensure that the flow rate through each of the electrolytic cells does not exceed a threshold flow rate for each electrolytic cell.

15. A method for generating a volume of oxygenated water, comprising:

forcing a volume of water through a plurality of electrolytic cells coupled together in series, such that the volume of water flows from the outlet era first electrolytic cell into an inlet of a second electrolytic cell;

measuring the dissolved oxygen content of the volume of water as it exits each of the electrolytic cells;

energizing with electric current a selected one of the electrolytic cells through which water is passing such that the dissolved oxygen content of the volume of water reaches a desired value;

increasing the water flow rate until the oxygen content is below the desired value; and

energizing with electric current at least one additional electrolytic cell if the measured oxygen content is below the desired value.

16. The method according to claim 15, further comprising directing the volume of water to an outlet when the dissolved oxygen content of the volume of water is equal to or greater than the desired value.

17. A method for generating a volume of oxygenated water, comprising:

drawing a volume of water at a user selected flow rate through a plurality of electrolytic cells coupled together in series, such that the volume of water flows from the outlet of a first electrolytic cell into an inlet of a second electrolytic cell, the first electrolytic cell being energized;

measuring the user selected flow rate;

comparing the measured flow rate to a threshold flow rate; and

energizing at least one additional electrolytic cell if the measured flow rate exceeds the threshold flow rate.

18. The method according to claim 17, further including:

changing the position of a valve between the first and second electrolytic cells to cause at least a portion of the water to flow from the first electrolytic cell to the outlet.