Integrated cleaning and sanitizing system and method for ice machines

• US 6,619,051 B1
• Filed: 07/12/2002
• Issued: 09/16/2003
• Est. Priority Date: 07/12/2002
• Status: Expired due to Term

• Current Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Original Assignee: Ecolab, Inc.
• Inventors: Tallman, Daniel, Dao, Quang, Kilawee, Patick
• Primary Examiner(s): Tapolcai, William E.
• Assistant Examiner(s): Ali, Mohammad M.
• Application Number:
  US10/194,184
• Time in Patent Office: 431 Days
• Field of Search: 62/78, 623/03, 623/48, 134/54, 134/56.R, 134/58.R, 510/247, 510/253, 510/383, 510/375, 510/504, 510/434
• US Class Current: 62/78
• CPC Class Codes: A23G 9/30 Cleaning; Keeping clean; Sterilisation
• CPC Class Codes: A61L 2/18 Liquid substances or solutions comprising solids or dissolved gases
• CPC Class Codes: A61L 2/24 Apparatus using programmed or automatic operation
• CPC Class Codes: B08B 9/032 by the mechanical action of a moving fluid, e.g. by flushing B08B9/04 takes precedence ; by fluid jets mounted on cleaning devices B08B9/0433
• CPC Class Codes: F25C 1/12 by freezing water on cooled surfaces, e.g. to form slabs
• CPC Class Codes: F25C 2400/12 Means for sanitation

Abstract

A deliming and sanitizing process which includes injecting a liquid delimer composition into a pre-mix reservoir, and substantially simultaneously injecting a second liquid sanitizing composition into a pre-mix reservoir wherein the liquid delimer composition and the liquid sanitizing composition form a mixture which is then transported from the pre-mix reservoir into a water circulation system such as in an automatic ice machine for cleaning and sanitizing the system.

Claims

1. A deliming and sanitizing process for an ice machine having a water flow system, a sump, an ice bin, and at least one drain, the machine having a headspace within the interior thereof accessible to the interior of the machine, the process comprising,

injecting a liquid delimer composition comprising at least one acidic component into the sump, and

substantially simultaneously injecting a second sanitizing composition into the sump.

2. The process of claim 1 wherein said liquid delimer composition and said sanitizing composition are injected into a pre-mix reservoir to form a mixture said reservoir having an exit port in fluid communication with said sump.

3. The process of claim 2 wherein said ice machine further comprises an electronic monitoring and control system.

4. The process of claim 3 wherein said electronic monitoring and control system is further equipped with a fail safe system for preventing overflow of said pre-mix reservoir.

5. The process of claim 1 wherein said sanitizing composition comprises a metal chlorite, a metal hypochlorite, a quaternary ammonium compound or peracetic acid.

6. The process of claim 1 wherein said delimer comprises an acidic compound.

7. The process of claim 1 wherein said sanitizing component comprises a metal hypochlorite and said delimer composition comprises an acidic compound and the ratio of said metal hypochlorite to said acidic component is about 1:

4 to about 1;

15 on a molar basis.

8. The process of claim 1 wherein said sanitizing component comprises a metal hypochlorite and said delimer composition comprises an acidic compound and the ratio of said metal hypochlorite to said acidic component is about 1:

5 to about 1;

10 on a molar basis.

9. The process of claim 1 wherein injecting step is accomplished by at least one selected from the group consisting of a positive displacement pump, a gear pump, an oscillating pump, a screw pump, a syringe pump, a piston pump or a peristaltic pump.

10. The process of claim 1 wherein said injecting step is accomplished with one dual liquid pumping mechanism.

11. The process of claim 1 wherein said delimer composition comprises at least one member selected from the group consisting of phosphoric acid, sulfuric acid, hydrochloric acid, citric acid, and mixtures thereof.

12. A deliming and sanitizing process for an ice machine having a water flow system, a sump, an ice bin and at least one drain, the machine having a headspace within the interior thereof accessible to the interior of the machine, the process comprising,

injecting a liquid delimer composition comprising at least one acidic component into a pre-mix reservoir which is in fluid communication with the sump, and

substantially simultaneously injecting a liquid sanitizer composition into said pre-mix reservoir.

wherein said pre-mix reservoir is in fluid communication with said sump and said sump is in fluid communication with said water flow system.

13. The process of claim 12 wherein said liquid delimer is an acidic delimer and said sanitizing composition is sodium chlorite or sodium hypochlorite.

14. An automatic ice-making machine comprising:

a) a water flow system;

b) a sump;

c) an ice bin;

c) at least one drain; and

d) an automatic cleaning system comprising a dual liquid injecting mechanism for injecting a first liquid delimer composition and a second liquid sanitizer composition, and a pre-mix reservoir wherein each of a predetermined amount of said first liquid delimer composition and said second liquid sanitizer composition are injected into said pre-mix reservoir and upon activation by said automatic cleaning system are injected into said water flow system of said ice making machine.

15. The automatic ice-making machine of claim 14 wherein said reservoir is in fluid communication with said sump.

16. The automatic ice-making machine of claim 14 wherein said ice making machine has a single drain for the ice bin and the sump.

17. The automatic ice making machine of claim 14 wherein said first liquid is an acidic delimer composition.

18. The automatic ice making machine of claim 14 wherein said first liquid is an acidic delimer composition and said second liquid is a metal chlorite or a metal hypochlorite composition.

19. The automatic ice making machine of claim 18 wherein chlorine dioxide is present in said pre-mix reservoir, in said sump and in said head space of said ice making machine.

20. The automatic ice making machine of claim 14 wherein said second liquid is a metal chlorite composition, a metal hypochlorite composition, a quaternary ammonium composition or a peracetic acid composition.

21. The automatic ice making machine of claim 14 wherein said dual injecting mechanism is a positive displacement pump, a gear pump, an oscillating pump, a screw pump, a syringe pump, a piston pump or a peristaltic pump.