Sanitizing filter system and method for a residential water filtering system

Patent metadata

Field	Value
Publication number	US-10780377-B2
Application number	US-201715827616-A
Country	US
Kind code	B2
Filing date	Nov 30, 2017
Priority date	Nov 30, 2016
Publication date	Sep 22, 2020
Grant date	Sep 22, 2020

Abstract

A sanitizing filter for sanitizing a residential water filtering system has a water filter assembly including a cartridge operable for removable attachment to the water filter assembly. When the cartridge is attached to the water filter assembly, a water flow passes into the cartridge, mixes with sanitizing media within the cartridge, and passes back into the water filter assembly. The residential water filtering system is then filled and flushed repeatedly and the mixture of water and sanitizing media sanitizes the portions of the system that are downstream from the sanitizing filter.

First claim

What is claimed is:

1. A sanitizing filter for sanitizing a residential water filtering system having a water filter assembly, the sanitizing filter comprising:
a cartridge operable for removable attachment to the water filter assembly, the cartridge including:
an annular inlet configured to receive water from the residential filtering system;
an outer chamber configured to route water from the annular inlet into a lower chamber;
an inner chamber located between the lower chamber and an upper chamber, the inner chamber configured to route water from the lower chamber into the upper chamber; and
an upper nozzle located central to the annular inlet and configured to pass water from the upper chamber into the residential water filtering system; and

a sanitizing media located within the inner chamber of the cartridge,
wherein:
when the cartridge is attached to the water filter assembly, a water flow through the residential water filtering system distributes a mixture of the sanitizing media and the water, sanitizing a portion of the residential water filtering system.

2. The filter of claim 1 wherein water flowing through the cartridge passes through the inner chamber to mix with the sanitizing media.

3. The filter of claim 2 wherein the upper chamber is located adjacent to the inner chamber and the upper nozzle.

4. The filter of claim 3 wherein a lower sediment pad divides the lower chamber and the inner chamber to filter water therebetween.

5. The filter of claim 4 wherein an upper sediment pad divides the inner chamber and the upper chamber to filter water therebetween.

6. The filter of claim 1 , wherein all water flowing through the cartridge passes from the annular inlet to the outer chamber, from the outer chamber into the lower chamber, from the lower chamber into the inner chamber, from the inner chamber into the upper chamber, from the upper chamber into the upper nozzle, from the upper nozzle into the residential water filtering system.

7. The filter of claim 1 , wherein the outer chamber is only fluidly connected to the inner chamber via the lower chamber.

8. The filter of claim 1 , wherein walls of the inner chamber fluidly seal the inner chamber from the outer chamber.

9. The filter of claim 1 , wherein the lower chamber is below the inner chamber and the upper chamber is above the inner chamber, the upper chamber being opposite the lower chamber.

10. A method of sanitizing a residential water filtering system, the water filtering system operable to facilitate the transfer of water between a water supply and a faucet, comprising:
draining the residential water filtering system a first time;
placing a sanitizing filter including sanitizing media within the residential water filtering system such that water flowing between the water supply and faucet passes through the filter and mixes with the sanitizing media;
filling the residential water filtering system with water from the water supply, an area of the residential water filtering system downstream of the sanitizing filter filling with a mixture of water and sanitizing media;
allowing the residential water filtering system to remain filled for a first period of time;
draining the residential water filtering system a second time;
advancing water from the water supply to the faucet for a second period of time;
blocking flow through the faucet to fill the residential water filtering system;
allowing the residential water filtering system to remain filled for a third period of time;
repeating, at least one time, the steps from draining the residential water filtering system a second time to allowing the residential water filtering system to remain filled for a third period of time; and
removing the sanitizing filter from residential water filtering system.

11. The method of claim 10 wherein the first period of time is between 20 seconds and 150 seconds.

12. The method of claim 10 wherein the second period of time is between 30 seconds and 120 seconds.

13. The method of claim 10 wherein the third period of time is between 5 and 15 minutes.

14. The method of claim 10 wherein the third period of time is between 9 and 11 minutes.

15. The method of claim 10 further comprising, after removing the sanitizing filter, replacing the sanitizing filter with a reverse osmosis filter within the residential water filtering system.

16. The method of claim 10 wherein the residential water filtering system includes a post carbon filter downstream of the sanitizing filter, further comprising replacing the post carbon filter with a new post carbon filter.

17. The method of claim 16 further comprising, after the step of replacing the post carbon filter, advancing water from the water supply to the faucet to flush the residential water system.

18. The method of claim 10 wherein in the step of repeating, at least one time, the steps are repeated two times.

19. The method of claim 10 where the residential water filtering system includes a carbon pre-filter and a sediment pre-filter located upstream of the sanitizing filter, the method further comprising replacing the carbon pre-filter with a new carbon pre-filter and replacing the sediment pre-filter with a new sediment pre-filter.

20. A method of sanitizing a residential water filtering system, the water filtering system operable to facilitate the transfer of water between a water supply and a faucet, comprising:
(a) actuating a first valve into a closed position to prevent water from the water supply from entering the water filtering system;
(b) actuating a second valve into an open position to drain the water filtering system by allowing substantially all of the water within the system to flow out of the faucet;
(c) actuating the second valve into a closed position to prevent water from leaving the water filtering system through the faucet;
(d) removing a reverse osmosis filter from a first location within the water filtering system;
(e) attaching a sanitizing filter at the first location within the water filtering system;
(f) actuating the first valve into an open position to allow water from the water supply to flow through the sanitizing filter and fill the water filtering system;
(g) waiting at least 30 seconds after the water filtering system is filled;
(h) actuating the first valve into the closed position to prevent water from the water supply from entering the water filtering system;
(i) actuating the second valve into the open position to substantially drain the water filtering system through the faucet;
(j) actuating the first valve into the open position to allow water to flow between the water supply and faucet for at least 60 seconds;
(k) actuating the second valve into the closed position to allow the water filtering system to be completely filled by water from the water supply;
(l) waiting at least 10 minutes after the water filtering system is filled;
(m) repeating steps (h) through (l) at least 3 times;
(n) removing the sanitizing filter from the first location;
(o) attaching the reverse osmosis filter to the first location;
(p) replacing a first post carbon filter at a second location within the water filtering system with a second post carbon filter at the second location; and
(q) repeating steps (h) through (l).

Assignees

• Watts Regulator Co

Inventors

• Schmitt Craig
• Trovo Renato
• Benefiel Tracie

Classifications

• C02F9/20

  Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems · CPC title

• B01D61/12 Primary

  Controlling or regulating · CPC title

• B01D2313/57

  Tools used for removal of membranes · CPC title

• B01D61/081

  used at home, e.g. kitchen · CPC title

• B01D2313/48

  Mechanisms for switching between regular separation operations and washing · CPC title