Laundry waste water treatment and wash apparatus

• US 5,181,399 A
• Filed: 03/10/1992
• Issued: 01/26/1993
• Est. Priority Date: 02/26/1991
• Status: Expired due to Fees

• Current Assignee: Tri-O-Clean Laundry Systems, Inc.
• Original Assignee: Tri-O-Clean Laundry Systems, Inc.
• Inventors: Gallo, John B., Engel, Richard B., Engel, Virginia F., Bladen, Donald H.
• Primary Examiner(s): Coe, Philip R.
• Application Number:
  US07/847,277
• Time in Patent Office: 322 Days
• Field of Search: 8/158, 68/13 R, 68/18 R, 68/18 F, 68/183, 68/207, 68/902, 422/186.12, 422/186.18, 422/186.19
• US Class Current: 68/13.00R
• CPC Class Codes: C02F 1/78 with ozone C02F1/4672 takes precedence
• CPC Class Codes: C02F 2201/78 Details relating to ozone treatment devices
• CPC Class Codes: D06F 35/001 using ozone

Abstract

A method and apparatus for washing laundry without hot water and detergent using a closed loop ozonated wash water system wherein wash water maintained in a storage tank is ozonated by an ozone generator prior to use in a washing machine. The spent wash water is collected, filtered and reused thereby eliminating waste water disposal problems an resulting in considerable water and energy savings. The ozone generator includes a unique air flow configuration to maximize ozone generation resulting in a high efficiency washing system.

Claims

1. An apparatus for washing laundry in a closed loop system using ozonated wash water comprising:

a holding tank for maintaining a supply of wash water prior to use in a wash cycle;

means for generating ozone;

means for transferring the ozone into the holding tank;

means for mixing and recirculating the ozone and the wash water in said holding tank;

washing means for washing laundry;

means for supplying the wash water and ozone from said holding tank to said washing means; and

means for collecting spent wash water from said washing means at the end of a wash cycle for reuse for washing laundry.

2. The apparatus of claim 1 further including means for removing waste wash material from the spent wash water.

3. The apparatus of claim 2 wherein said removing means is a filter.

4. The apparatus of claim 1 including a source of water for replenishing wash water lost during the washing process.

5. The apparatus of claim 1 wherein said means for generating ozone includes at least one corona discharge unit having a high voltage discharge tube connected to a high voltage source for creating a corona discharge field on the outside thereof and having a non-linear air flow path on said outside of said tube permitting a non-linear air flow pattern through the corona discharge field.

6. The apparatus of claim 5 wherein said non-linear air flow path is helical.

7. The apparatus of claim 6 wherein said helical path is formed by a helical rib formed on the outside of said tube in combination with an outer sleeve on said tube.

8. The apparatus of claim 6 further including means for drawing air across said corona discharge unit causing the air to interact with the corona discharge field to create ozone.

9. The apparatus of claim 8 wherein said air drawing means is a pump connected in a discharge air flow path to said non-linear air flow path on said tube.

10. The apparatus of claim 9 wherein said discharge air flow path terminates in a discharge nozzle in said holding tank for entraining ozone into the wash water in said holding tank.

11. The apparatus of claim 10 further including a second mixing means adjacent said discharge nozzle for mixing ozone in the wash water as it enters into said holding tank.

12. The apparatus of claim 5 wherein said ozone generator means include a plurality of corona discharge units.

13. The apparatus of claim 12 further including means for cooling said corona discharge units.

14. The apparatus of claim 1 further including storing means for storing said spent wash water prior to reuse for washing laundry.

15. The apparatus of claim 14 further including means for transferring the spent wash water to the storing means and means for removing waste wash material from the spent wash water.

16. The apparatus of claim 14 wherein said storing means is a storage tank in fluid communication with the holding tank.

17. An apparatus for washing laundry in an closed loop system using ozonated wash water comprising:

a holding tank for maintaining a supply of wash water prior to use in a wash cycle;

means for generating ozone;

means for mixing the ozone in the wash water in said holding tank;

a washing means for washing laundry;

means for transferring wash water from said holding tank to said washing means;

means for collecting spent wash water from said washing means at the end of a wash cycle for reuse for washing laundry;

means for storing said spent wash water prior to reuse for washing laundry; and

,

means for recirculating the spent wash water into the holding tank.

18. The apparatus of claim 17 further including means for removing waste wash material from the spent wash water.

19. The apparatus of claim 18 wherein said means for removing is a filter.

20. The apparatus of claim 17 further including means for mixing and recirculating the wash water in said holding tank.

21. The apparatus of claim 20 wherein said mixing and recirculating means is a recirculating line with a pump for pumping the wash water between the top and bottom of said holding tank.