Cold water delivery system

Patent metadata

Field	Value
Publication number	US-9938700-B2
Application number	US-201313973610-A
Country	US
Kind code	B2
Filing date	Aug 22, 2013
Priority date	Aug 23, 2012
Publication date	Apr 10, 2018
Grant date	Apr 10, 2018

Abstract

A cold water delivery system is described that can consistently provide cold water at a desired temperature over repetitive and large draws from the outlet of the system. The cold water system can provide multiple pathways for the water to travel from a source, or inlet, to the outlet. A cooling system can be provided that cools a plurality of reservoirs of water. The reservoirs can maintain cold water at different temperatures. A control system controls the cooling system to maintain the temperature of the water in the reservoirs. The control system can also control one or more mixing valves to determine the volume of water from each of the reservoirs and the water inlet that reaches the outlet.

First claim

What is claimed is:

1. A cold water delivery system comprising:
an inlet for receiving water at a first temperature;
an outlet for dispensing water;
a first reservoir fluidly connected to the inlet and the outlet, the first reservoir receiving water from the inlet and maintaining the water received therein from the inlet at a second temperature that is lower than the first temperature;
a second reservoir fluidly connected to the inlet and the outlet, the second reservoir maintaining the water received therein at a third temperature that is lower than the second temperature; and
a mixing valve system, the mixing valve system having a first inlet port, a second inlet port, a third inlet port, and an outlet port, wherein the first inlet port is fluidly connected to the inlet for receiving water at the first temperature, the second inlet port is fluidly connected to the first reservoir for receiving water at the second temperature, the third inlet port is fluidly connected to the second reservoir for receiving water at the third temperature, and the outlet port is fluidly connected to the outlet, the mixing valve system receiving water from the first reservoir at the second temperature and water from the inlet at the first temperature, and further receiving water from the second reservoir at the third temperature, and configured for mixing water from the first, second and third temperatures when the water dispensed from the outlet rises above a predetermined threshold temperature;
wherein the mixing valve proportions the water dispensed from the outlet from amongst the water received from the first reservoir, the second reservoir, and the inlet at the first temperature to maintain the water dispensed from the outlet at or below the predetermined threshold temperature.

2. The cold water delivery system of claim 1 wherein the mixing valve blocks the flow of water from the inlet at the first temperature to the outlet.

3. The cold water delivery system of claim 1 wherein the mixing valve blocks the flow of water from the inlet at the first temperature to the outlet when water dispensed from the outlet rises above the predetermined threshold temperature.

4. The cold water delivery system of claim 1 wherein the mixing valve blocks the flow of water from the first reservoir to the outlet.

5. The cold water delivery system of claim 1 wherein the predetermined threshold temperature is approximately 55° F.

6. The cold water delivery system of claim 1 wherein the first temperature is approximately 70° F. or lower.

7. The cold water delivery system of claim 1 further comprising a plurality of temperature sensors for sensing the first temperature, the second temperature, the third temperature, and the temperature of the water dispensed from the outlet.

8. The cold water delivery system of claim 7 wherein the mixing valve proportions the water dispensed from the outlet from amongst the water received from the first reservoir, the second reservoir, and the inlet based upon the temperatures sensed by the plurality of the temperature sensors.

9. The cold water delivery system of claim 1 , wherein the second reservoir receives water from the inlet at the first temperature.

10. The cold water delivery system of claim 9 , further comprising a second mixing valve for directing water from the second reservoir into the first reservoir when water dispensed from the outlet rises above the predetermined threshold temperature.

11. The cold water delivery system of claim 10 wherein the second mixing valve blocks the flow of water from the inlet to the first reservoir when water dispensed from the outlet rises above the predetermined threshold temperature.

12. The cold water delivery system of claim 1 , wherein the second reservoir receives water from the first reservoir.

13. The cold water delivery system of claim 12 , wherein the mixing valve blocks water from the first reservoir from being dispensed at the outlet when water dispensed from the outlet rises above the predetermined threshold temperature.

14. The cold water delivery system of claim 1 further comprising a control system for determining the proportion of water to be dispensed by the mixing valve.

15. A method of dispensing cold water comprising:
receiving water at a first temperature from an inlet;
directing water from the inlet to a first reservoir fluidly connected to both the inlet and an outlet for dispensing water;
cooling the water in the first reservoir to a second temperature that is lower than the first temperature;
directing water to a second reservoir fluidly connected to the inlet and the outlet;
cooling the water in the second reservoir to a third temperature that is lower than the second temperature;
directing water from the first reservoir and the inlet at the first temperature to the outlet;
directing water from the second reservoir to the outlet when water dispensed from the outlet rises above a predetermined threshold temperature; and
using a valve system having a first inlet connected to the inlet and receiving water at the first temperature, a second inlet connected to the first reservoir and water at the second temperature, and a third inlet connected to the second reservoir and receiving water at the third temperature; and
proportioning the water dispensed from the outlet using the valve system from amongst the water received from the first reservoir, the second reservoir, and the inlet at the first temperature to maintain the water dispensed from the outlet at or below the predetermined threshold temperature.

16. The method of dispensing cold water of claim 15 further comprising blocking the flow of water from the inlet at the first temperature to the outlet.

17. The method of dispensing cold water of claim 16 further comprising blocking the flow of water from the inlet at the first temperature to the outlet when water dispensed from the outlet rises above the predetermined threshold temperature.

18. The method of dispensing cold water of claim 15 further comprising blocking the flow of water from the first reservoir to the outlet.

19. The method of dispensing cold water of claim 15 wherein the predetermined threshold temperature is approximately 55° F.

20. The method of dispensing cold water of claim 15 wherein the first temperature is approximately 70° F. or lower.

21. The method of dispensing cold water of claim 15 further comprising sensing the first temperature, the second temperature, the third temperature, and the temperature of the water dispensed from the outlet.

22. The method of dispensing cold water of claim 21 further comprising proportioning the water dispensed from the outlet from amongst the water received from the first reservoir, the second reservoir, and the inlet based upon the first temperature, the second temperature, the third temperature, and the temperature of the water dispensed from the outlet.

23. The method of dispensing cold water of claim 15 further comprising directing water from the inlet at the first temperature to the second reservoir.

24. The method of dispensing cold water of claim 23 , further comprising directing water from the second reservoir into the first reservoir when water dispensed from the outlet rises above the predetermined threshold temperature.

25. The method of dispensing cold water of claim 24 further comprising blocking the flow of water from the inlet to the first reservoir when wate

Assignees

• Elkay Mfg Co

Inventors

• Shaw Damon D
• Savoni Franco
• Hansen Russ
• Fulford Evan A
• Leiser Joel E

Classifications

• Y10T137/0329

  Mixing of plural fluids of diverse characteristics or conditions · CPC title

• Y10T137/86815

  Multiple inlet with single outlet · CPC title

• B67D1/0014

  the beverage being supplied from water mains · CPC title

• E03C1/02 Primary

  Plumbing installations for fresh water · CPC title

• B67D3/0009 Primary

  provided with cooling arrangements (cooling perse F25) · CPC title