Deionization filter assembly with cylinder-in-cylinder design

Patent metadata

Field	Value
Publication number	US-2025387730-A1
Application number	US-202318877815-A
Country	US
Kind code	A1
Filing date	Jun 27, 2023
Priority date	Jun 29, 2022
Publication date	Dec 25, 2025
Grant date	—

Abstract

A deionization filter assembly includes an outer cylinder, an inner cylinder. an endcap, and a screen. The outer cylinder includes a first outer end and a second outer end and is configured to contain an outer resin bed. The inner cylinder is positionable within the outer cylinder and includes a first inner end and a second inner end. The inner cylinder is configured to contain an inner resin bed. The endcap is positionable along the first outer end of the outer cylinder and the first inner end of the inner cylinder and includes an inlet and an outlet. The screen is positionable between the endcap and the outer cylinder and the inner cylinder.

First claim

What is claimed is:

1 . A deionization filter assembly, comprising:
an outer cylinder comprising a first outer end and a second outer end, the outer cylinder configured to contain an outer resin bed; an inner cylinder positionable within the outer cylinder and comprising a first inner end and a second inner end, the inner cylinder configured to contain an inner resin bed; an endcap positionable along the first outer end of the outer cylinder and the first inner end of the inner cylinder and comprising an inlet and an outlet; and a screen positionable between the endcap and the outer cylinder and the inner cylinder.

2 . The deionization filter assembly of claim 1 , wherein the first outer end of the outer cylinder is open to fluid flow therethrough and the second outer end of the outer cylinder is closed to fluid flow therethrough.

3 . The deionization filter assembly of claim 2 , wherein when assembled the inner cylinder extends between an inner surface of a lower wall positioned along the second outer end of the outer cylinder and the first outer end of the outer cylinder.

4 . The deionization filter assembly of claim 1 , wherein the inner cylinder includes an axial rib portion extending radially away from an outer surface of the inner cylinder, and an elevation rib extending axially away from the second inner end of the inner cylinder.

5 . The deionization filter assembly of claim 1 , wherein the endcap comprises an endcap outer circumferential wall that is radially aligned with an outer cylinder circumferential wall of the outer cylinder, the inlet of the endcap extending tangentially to the endcap outer circumferential wall.

6 . The deionization filter assembly of claim 1 , wherein the endcap comprises an endcap outer circumferential wall that is radially aligned with an outer cylinder circumferential wall of the outer cylinder, the outlet of the endcap tapering axially from the endcap outer circumferential wall.

7 . The deionization filter assembly of claim 1 , wherein the screen is positionable along the first outer end of the outer cylinder and the first inner end of the inner cylinder.

8 . The deionization filter assembly of claim 7 , wherein the screen includes (i) an outer impression positioned to be received within an outer groove at the first outer end of the outer cylinder, and (ii) an inner impression positioned to be received within an inner groove at the first inner end of the inner cylinder.

9 . The deionization filter assembly of claim 1 , further comprising a pressure relief mechanism that is configured to bypass fluid flow between the inlet and the outlet when an applied pressure across the inner resin bed and the outer resin bed is greater than or equal to a bypass threshold pressure.

10 . A deionization filter assembly, comprising:
an outer cylinder defining an open end and a closed end; an inner cylinder positioned within the outer cylinder and spaced radially apart from the outer cylinder to define an annulus therebetween, the inner cylinder defining an inner cavity that is fluidly coupled to the annulus at the closed end of the outer cylinder; an outer resin bed contained within the annulus; and an inner resin bed contained within the inner cavity.

11 . The deionization filter assembly of claim 10 , the inner cylinder comprising:
an inner cylinder circumferential wall; and at least one elevation rib that extends axially away from the inner cylinder circumferential wall, the at least one elevation rib spacing the inner cylinder circumferential wall axially apart from the closed end of the outer cylinder to define a flow passage between the annulus and the inner cavity.

12 . The deionization filter assembly of claim 10 , wherein a height of the inner cylinder is approximately equal to a height of the annulus.

13 . The deionization filter assembly of claim 10 , wherein the inner cylinder includes an inner cylinder circumferential wall that is open to fluid flow axially therethrough from a first inner end of the inner cylinder through a second inner end of the inner cylinder.

14 . The deionization filter assembly of claim 10 , wherein the outer cylinder includes an outer cylinder circumferential wall, the inner cylinder including:
an inner cylinder circumferential wall; and at least one axial rib extending radially away from the inner cylinder circumferential wall, the at least one axial rib radially spacing the inner cylinder circumferential wall and the outer cylinder circumferential wall apart to form the annulus.

15 . The deionization filter assembly of claim 10 , further comprising:
an endcap coupled to the inner cylinder and the outer cylinder at the open end of the outer cylinder; and a screen positioned between the endcap and the outer cylinder and the inner cylinder.

16 . The deionization filter assembly of claim 15 , wherein the endcap includes:
an endcap outer circumferential wall radially aligned with an outer cylinder circumferential wall of the outer cylinder, an inlet extending tangentially to the endcap outer circumferential wall, and an outlet tapering axially from the endcap outer circumferential wall.

17 . The deionization filter assembly of claim 15 , wherein the screen includes (i) an outer impression positioned within an outer groove at the open of the outer cylinder, and (ii) an inner impression positioned within an inner groove at a first inner end of the inner cylinder.

18 . A method of assembling a deionization filter assembly, comprising:
positioning an inner cylinder within an outer cylinder to define an annulus therebetween and so that the annulus is fluidly coupled to an inner cavity of the inner cylinder at a closed end of the outer cylinder; placing an inner resin bed within the inner cavity; and placing an outer resin bed within the annulus.

19 . The method of claim 18 , further comprising:
placing a screen on the inner cylinder and the outer cylinder at an open end of the inner cylinder and the outer cylinder; and coupling an endcap to the inner cylinder and the outer cylinder so that the screen is disposed axially between (i) the endcap and (ii) the inner cylinder and the outer cylinder.

20 . The method of claim 19 , wherein positioning the inner cylinder within the outer cylinder includes engaging at least one rib of the inner cylinder that extends axially away from an inner cylinder circumferential wall of the inner cylinder with a lower wall of the outer cylinder at the closed end of the outer cylinder so that the inner cylinder circumferential wall is spaced axially apart from the lower wall.

Assignees

• Cummins Filtration Inc

Inventors

• Ghatnekar Shantanu Sanjay
• Bhittam Balasaheb Mahadev
• Kumar Singh Dhananjay

Classifications

• H01M8/04044

  Purification of heat exchange media · CPC title

• B01D15/363

  Anion-exchange · CPC title

• B01D15/362

  Cation-exchange · CPC title

• B01D15/22 Primary

  relating to the construction of the column · CPC title

• C02F2201/005

  Valves · CPC title