Burner box liner for low NOx emission furnace

Patent metadata

Field	Value
Publication number	US-11543123-B2
Application number	US-202016899886-A
Country	US
Kind code	B2
Filing date	Jun 12, 2020
Priority date	Oct 3, 2017
Publication date	Jan 3, 2023
Grant date	Jan 3, 2023

Abstract

A burner box assembly according to aspects of the disclosure includes an outer cover, the outer cover having a sloped bottom face that directs condensation away from a heat-exchange tube, a heat-resistant liner having a plurality of panel members, the heat-resistant liner being disposed within the outer cover, a shield disposed between the heat-resistant liner and the sloped bottom face of the outer cover such that an air gap is formed between the shield and the sloped bottom face, and a tubular member abutting at least one of the plurality of panel members and disposed within the heat-exchange tube.

First claim

What is claimed is:

1. A burner box assembly comprising:
an outer cover having a top face and a sloped bottom face;
a liner disposed within the outer cover and comprising a plurality of panel members, wherein the plurality of panel members comprise oppositely disposed panels, a top panel member, and a bottom panel;
wherein the top face is generally parallel to the top panel member, wherein the sloped bottom face directs condensation away from a heat-exchange tube;
a shield disposed between the liner and the sloped bottom face such that an air gap is formed between the shield and the sloped bottom face; and
a tubular member abutting at least one of the plurality of panel members.

2. The burner box assembly of claim 1 , wherein the liner is heat-resistant and is constructed of a ceramic wafer board.

3. The burner box assembly of claim 1 , wherein the tubular member is constructed of a ceramic wafer board.

4. The burner box assembly of claim 1 , wherein the tubular member is constructed of a nickel-chromium alloy.

5. The burner box assembly of claim 1 , wherein the liner is constructed of a nickel-chromium alloy.

6. The burner box assembly of claim 1 , wherein the liner removably abuts interior surfaces of the outer cover.

7. The burner box assembly of claim 1 , wherein the liner lines interior surfaces of the outer cover.

8. The burner box assembly of claim 1 , wherein the liner comprises a mesh.

9. The burner box assembly of claim 1 , wherein the tubular member has a length in a range of approximately one inch to approximately ten inches.

10. The burner box assembly of claim 1 , wherein:
the outer cover comprises a first aperture formed therein and coupled to the heat-exchange tube;
the liner comprises a second aperture formed therein; and
the first aperture aligns with the second aperture.

11. The burner box assembly of claim 1 , wherein the liner comprises an open rear face that is configured to receive at least a portion of, and is thermally exposed to, a pre-mix burner.

12. A burner box assembly comprising:
an outer cover having a top face and a sloped bottom face;
a liner disposed within the outer cover and comprising a plurality of panel members, wherein the plurality of panel members comprise oppositely disposed panels, a top panel member, and a bottom panel;
wherein the top face is generally parallel to the top panel member, wherein the sloped bottom face directs condensation away from a heat-exchange tube; and
a tubular member coupled to at least one of the plurality of panel members.

13. The burner box assembly of claim 12 , wherein the liner is heat-resistant and removably abuts interior surfaces of the outer cover.

14. The burner box assembly of claim 12 , wherein the liner lines interior surfaces of the outer cover.

15. The burner box assembly of claim 12 , wherein the liner comprises an open rear face that is configured to receive at least a portion of, and is thermally exposed to, a pre-mix burner.

16. A burner box assembly comprising:
an outer cover having a top face and a sloped bottom face;
a liner disposed within the outer cover and comprising a plurality of panel members, wherein the plurality of panel members comprise oppositely disposed panels, a top panel member, and a bottom panel;
wherein the top face is generally parallel to the top panel member, wherein the sloped bottom face directs condensation away from a heat-exchange tube;
a shield disposed between the liner and the sloped bottom face such that an air gap is formed between the shield and the sloped bottom face;
a tubular member abutting at least one of the plurality of panel members;
wherein the liner is heat-resistant; and
wherein the liner and the tubular member are constructed of a ceramic wafer board.

Assignees

• Lennox Ind Inc

Inventors

• Perez Eric
• Poirier Randal
• Chanthalangsy Eric
• Schneider Steven

Classifications

• F23D14/02 Primary

  Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone · CPC title

• F24H8/006

  Means for removing condensate from the heater · CPC title

• F23D14/60 Primary

  Devices for simultaneous control of gas and combustion air · CPC title

• F23D14/62

  Mixing devices; Mixing tubes · CPC title

• F23L17/005

  using fans · CPC title