Combustion tube assembly of a water heater

Patent metadata

Field	Value
Publication number	US-11073303-B2
Application number	US-201816218322-A
Country	US
Kind code	B2
Filing date	Dec 12, 2018
Priority date	Dec 12, 2018
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

A combustion tube assembly of a water heater includes a combustion tube having an open end, a closed end, and an outflow opening located between the open end and the closed end. A cavity of the combustion tube provides a chamber for a combustion of a water heater fuel that produces an exhaust gas that flows down toward the closed end. The combustion tube assembly further includes a diverter structure positioned inside the combustion tube to divert the exhaust gas such that the exhaust gas flows toward the closed end on a first side of the diverter structure and flows from the first side of the diverter structure to the second side of the diverter structure through a flow opening proximal to the closed end. The outflow opening provides an outlet for the exhaust gas that flows to the second side of the diverter structure to exit the combustion tube.

First claim

What is claimed is:

1. A combustion tube assembly of a water heater, the combustion tube assembly comprising:
a combustion tube having an open end, a closed end, and an outflow opening located between the open end and the closed end, wherein a cavity of the combustion tube provides a chamber for a combustion of a water heater fuel that produces an exhaust gas that flows down toward the closed end; and
a diverter structure positioned inside the combustion tube and including a first section having a first leg and a second leg affixed to the closed end, the first leg and the second leg forming a flow opening, the diverter structure configured to divert the exhaust gas such that the exhaust gas flows toward the closed end on a first side of the diverter structure and flows from the first side of the diverter structure to a second side of the diverter structure through the flow opening proximal to the closed end and wherein the outflow opening provides an outlet for the exhaust gas that flows to the second side of the diverter structure to exit the combustion tube.

2. The combustion tube assembly of claim 1 , wherein the combustion tube is closed at the closed end by a cover structure that is attached to the combustion tube and wherein the first leg and the second leg are attached to the cover structure.

3. The combustion tube assembly of claim 2 , wherein the flow opening is bound by the diverter structure and the cover structure.

4. The combustion tube assembly of claim 1 , wherein the first section of the diverter structure is a wall section that extends down from an end of a slanted section of the diverter structure and wherein the slanted section is slanted down toward the wall section.

5. The combustion tube assembly of claim 4 , wherein the outflow opening is located below and proximal to the slanted section and distal from the closed end.

6. The combustion tube assembly of claim 1 , further comprising a separator structure positioned in the cavity, wherein the diverter structure and the separator structure provide a flow path on a first side of the separator structure for the exhaust gas that flows to the second side of the diverter structure to flow to a second side of the separator structure before exiting the combustion tube from the second side of the separator structure through the outflow opening.

7. The combustion tube assembly of claim 6 , wherein the outflow opening is located below a slanted section of the diverter structure and proximal to the closed end.

8. The combustion tube assembly of claim 1 , wherein the diverter structure further includes a wide section, the first section and the wide section defining a funnel shape.

9. The combustion tube assembly of claim 8 , wherein the first side of the diverter structure is through the first section and wherein the first section and a portion of the combustion tube define an annular space that is on the second side of the diverter structure.

10. The combustion tube assembly of claim 9 , wherein the outflow opening is located below and proximal to the wide section and distal from the closed end.

11. A heat exchanger assembly of a water heater, the heat exchanger assembly comprising:
a combustion tube having an open end, a closed end, and an outflow opening located between the open end and the closed end, wherein a cavity of the combustion tube provides a chamber for a combustion of a water heater fuel that produces an exhaust gas that flows down toward the closed end;
a diverter structure positioned inside the combustion tube and including a first section having a first leg and a second leg affixed to the closed end, the first leg and the second leg forming a flow opening, the diverter structure configured to divert the exhaust gas such that the exhaust gas flows toward the closed end on a first side of the diverter structure and such that the exhaust gas flows from the first side of the diverter structure to a second side of the diverter structure through the flow opening proximal to the closed end; and
a hollow coil attached to the combustion tube, wherein the outflow opening provides an outlet for the exhaust gas that flows to the second side of the diverter structure to exit the combustion tube into the hollow coil.

12. The heat exchanger assembly of claim 11 , wherein the combustion tube is closed at the closed end by a cover structure that is attached to the combustion tube and wherein the first leg and the second leg are attached to the cover structure.

13. The heat exchanger assembly of claim 11 , wherein the first section of the diverter structure is a wall section that extends down from an end of a slanted section and wherein the slanted section is slanted down toward the wall section.

14. The heat exchanger assembly of claim 11 , further comprising a separator structure positioned in the cavity, wherein the diverter structure and the separator structure provide a flow path on a first side of the separator structure for the exhaust gas that flows to the second side of the diverter structure to flow to a second side of the separator structure before exiting the combustion tube from the second side of the separator structure through the outflow opening.

15. The heat exchanger assembly of claim 11 , wherein the diverter structure further includes a wide section, the first section and the wide section defining a funnel shape, wherein the first side of the diverter structure is through the first section, and wherein the first section and a portion of the combustion tube define an annular space that is on the second side of the diverter structure.

16. A water heater, comprising:
a water tank;
a combustion system positioned at a top end of the water heater; and
a heat exchanger assembly positioned inside the water tank, the heat exchanger assembly comprising:
a combustion tube having an open end, a closed end, and an outflow opening located between the open end and the closed end, wherein a cavity of the combustion tube provides a chamber for a combustion of a water heater fuel that produces an exhaust gas that flows down toward the closed end; and
a diverter structure positioned inside the combustion tube and including a first section having one or more legs affixed to the closed end to form a flow opening and a wide section, the first section and the wide section defining a funnel shape, the diverter structure configured to divert the exhaust gas such that the exhaust gas flows toward the closed end on a first side of the diverter structure, the first side being through the first section, and such that the exhaust gas flows from the first side of the diverter structure to a second side of the diverter structure through the flow opening proximal to the closed end, the second side being an annular space between the first section and a portion of the combustion tube; and
a hollow coil attached to the combustion tube, wherein the outflow opening provides an outlet for the exhaust gas that flows to the second side of the diverter structure to exit the combustion tube into the hollow coil.

17. The water heater of claim 16 , wherein the combustion tube is closed at the closed end by a cover structure that is attached to the combustion tube and wherein the one or more legs is attached to the cover structure.

Assignees

• Rheem Mfg Co

Inventors

• Porwal Piyush
• Rao Ashwin
• Hall Jason
• Boros Jozef

Classifications

• F23J15/06

  of coolers · CPC title

• F24H1/145 Primary

  using fluid fuel · CPC title

• F24H9/1836 Primary

  using fluid fuel · CPC title

• F24H1/205

  with furnace tubes · CPC title

• F23B80/04

  by means for guiding the flow of flue gases, e.g. baffles · CPC title