Methods and apparatus for adjusting ice slab bridge thickness and initiate ice harvest following the freeze cycle

• US 9,625,199 B2
• Filed: 05/23/2013
• Issued: 04/18/2017
• Est. Priority Date: 07/11/2012
• Status: Active Grant

• Current Assignee: Pentair Flow Services AG (Pentair Plc (Ireland))
• Original Assignee: Maintowoc Foodservice Companies Incorporated
• Inventors: Antoine, Thomas H., Cayemberg, Curt R., Petersen, Dean M., Giebel, Mark P.
• Primary Examiner(s): Bidder, Allana Lewin
• Assistant Examiner(s): Febles, Antonio R
• Application Number:
  US13/901,128
• Publication Number:
  US 20140013781A1
• Time in Patent Office: 1,426 Days
• CPC Class Codes: F25C 1/00 Producing ice F25C3/00 takes precedence
• CPC Class Codes: F25C 1/12 by freezing water on cooled surfaces, e.g. to form slabs
• CPC Class Codes: F25C 1/22 Construction of moulds; Filling devices for moulds
• CPC Class Codes: F25C 2400/14 Water supply
• CPC Class Codes: F25C 2700/04 Level of water

Abstract

A method and apparatus for adjusting and controlling ice bridge slab thickness and/or initiation of ice harvest following a freeze cycle. This adjusting and controlling is performed through the use of adjustable float clip assemblies which set the amount of water available for ice making in a batch process. The adjustable float clip assemblies provide an ice machine user with the ability to easily adjust the ice slab bridge thickness to a single or plurality of settings, and allow for changes in ice bridge slab thickness at the site of installation.

Claims

1. An ice bridge thickness control for a batch water system ice making machine, wherein said ice making machine has a grid of ice-forming pockets to freeze individual cubes, and wherein said pockets comprise edges between said individual cubes, said control comprising:

at least two floats for setting a volume of water used for making ice in a water supply for the ice making machine, wherein said at least two floats comprise an upper float that sets a maximum water level of the volume of water in a sump tank used for producing ice, and a lower float that sets a minimum water level of the volume of water in the sump tank used for producing ice, and wherein said volume of water between said upper and lower floats is used to produce ice and control said ice bridge thickness over said edges of said ice-forming pockets; and

at least two float clips, wherein each of said at least two float clips has a front side configured to hold each of said at least two floats in the sump tank and at least the float clip holding the upper float has a back side configured to engage one of a plurality vertically spaced protrusions external to the sump tank, wherein said float clip holding said upper float is vertically adjustable by engaging protrusions at different vertical levels, and wherein said float clip holding said lower float is not vertically adjustable.

2. An ice bridge thickness control according to claim 1, wherein said lower float further controls the start of said ice harvesting.

3. An ice bridge thickness control according to claim 1, wherein each of said at least two float clips has a retaining opening on its front side configured to hold one of said at least two floats.

4. An ice bridge thickness control according to claim 3, wherein said upper float clip is vertically adjustable to at least three (3) different positions by engaging protrusions at three different vertical levels, and wherein each position corresponds to a different maximum water level for the volume of water used to produce ice.

5. An ice bridge thickness control according to claim 3, wherein said upper and lower floats are removable from said float clips without disconnecting said float clips from the control.

11. An ice bridge thickness control according to claim 4, wherein said upper float clip is vertically adjustable to five (5) different positions, wherein each position corresponds to a different maximum water level for the volume of water used to produce ice.

6. A method of controlling ice bridge thickness in a batch water system ice making machine, wherein said ice making machine has a grid of ice-forming pockets to freeze individual cubes, and wherein said pockets comprise edges between said individual cubes, said method comprising:

providing at least two floats for setting a volume of water used for making ice in a water supply in a sump tank for the ice machine, wherein said at least two floats comprise an upper float and a lower float;

setting a maximum water level of the volume of water in the sump tank used for producing ice by said upper float;

setting a minimum water level of the volume of water in the sump tank used for producing ice by said lower float;

providing at least two float clips, wherein each of said at least two float clips has a front side configured to hold each of said at least two floats in the sump tank and at least the float clip holding the upper float has a back side configured to engage one of a plurality of vertically spaced protrusions external to the sump tank, wherein said float clip holding said upper float is vertically adjustable by engaging protrusions at different vertical levels, and wherein said float clip holding said lower float is not vertically adjustable; and

producing ice until the volume of water between the levels set by said upper and lower floats is consumed, wherein said volume of water between said upper and lower floats controls said ice bridge thickness over said edges of said ice-forming pockets.

7. A method of controlling ice bridge thickness in an ice making machine according to claim 6, further comprising controlling the initiation of harvesting of ice by the position of said lower float in said water supply.

8. A method of controlling ice bridge thickness in an ice making machine according to claim 6, wherein each of said at least two float clips has a retaining opening on its front side configured to hold one of said at east two floats.

9. A method of controlling ice bridge thickness in an ice making machine according to claim 8, wherein said upper float clip is vertically adjustable to at least three (3) different positions by engaging protrusions at three different vertical levels, and wherein each position corresponds to a different maximum water level used to produce ice.

10. A method of controlling ice bridge thickness in an ice making machine according to claim 8, wherein said upper and lower floats are removable from said float clips without disconnecting said float clips from the control.

12. A method of controlling ice bridge thickness in an ice making machine according to claim 9, further comprising providing that said float clip associated with said upper float is vertically adjustable to five (5) different positions, wherein each position corresponds to a different maximum water level.