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US 9,316,411 B2Granted
HVAC furnace
AssigneeTrane International Inc.
InventorsLester D. Sherrow, Nancy Souvoravong, Jeffery Wayne O'Daniel
Life of this patent
Estimating the term…
Abstract
A heating, ventilation, and/or air conditioning (HVAC) furnace has a flat burner comprising an upstream side and a downstream side, the flat burner being configured to receive an air-fuel mixture therethrough, a first flow path located adjacent the flat burner and downstream relative to the flat burner, the first flow path configured to receive fluid exiting the flat burner, and a plurality of second flow paths located downstream relative to the first flow path, the plurality of second flow paths being configured to receive fluid from the first flow path.
Claims18
A heating, ventilation, and/or air conditioning (HVAC) furnace, comprising:
- an air-fuel premixer configured to mix air and a fuel;
- a mixture distributing box disposed downstream from the air-fuel premixer and comprising a deflector, wherein the deflector is disposed within the mixture distributing box such that the entirety of the air-fuel mixture mixed by the air-fuel premixer and combusted by the HVAC furnace passes through the mixture distributing box via a fluid flow path that is defined at least partially by a portion of the deflector and at least partially by an inner wall of the mixture distributing box;
- a flat burner comprising an upstream side and a downstream side, the flat burner being configured to receive the entirety of the air-fuel mixture therethrough from the mixture distributing box via the fluid flow path, wherein the deflector of the mixture distributing box is configured to promote an even distribution of the air-fuel mixture over the upstream side of the flat burner;
- a first flow path located adjacent the flat burner and downstream relative to the flat burner, the first flow path configured to receive fluid exiting the flat burner;
- and
- a plurality of second flow paths located downstream relative to the first flow path, the plurality of second flow paths being configured to receive fluid from the first flow path.
3 more elements
A method of operating a furnace, comprising:
- providing a flat burner comprising an upstream side and a downstream side;
- mixing air and fuel upstream of the flat burner in an air-fuel premixer;
- distributing the air-fuel mixture by passing the air-fuel mixture through a mixture distributing box comprising a deflector, wherein the deflector is disposed within the mixture distributing box such that the entirety of the air-fuel mixture mixed by the air-fuel premixer and combusted by the flat burner passes through the mixture distributing box via a fluid flow path that is defined at least partially by a portion of the deflector and at least partially by an inner wall of the mixture distributing box, and wherein the deflector is configured to provide an even distribution of the air-fuel mixture to the upstream side of the flat burner;
- and
- pulling the entirety of the air-fuel mixture received via the fluid flow path through the flat burner.
2 more elements
A furnace, comprising:
- an air-fuel premixer configured to mix air and a fuel;
- a mixture distributing box disposed downstream from the air-fuel premixer and comprising a deflector, wherein the deflector is disposed within the mixture distributing box such that the entirety of the air-fuel mixture mixed by the air-fuel premixer and combusted by the furnace passes through the mixture distributing box via a fluid flow path that is defined at least partially by a portion of the deflector and at least partially by an inner wall of the mixture distributing box;
- a post-combustion chamber coupled to the mixture distributing box, wherein the coupling of the mixture distributing box and the post-combustion chamber substantially envelope a cavity;
- a flat burner disposed within the cavity and configured to receive the entirety of the air-fuel mixture from the mixture distributing box via the fluid flow path, wherein the deflector of the mixture distributing box is configured to promote an even distribution of the air-fuel mixture over an upstream side of the flat burner;
- an upstream heat exchanger comprising a plurality of parallel heat exchanger flow paths configured to receive fluid from the cavity;
- and
- an inducer blower in fluid communication with the upstream heat exchanger, the inducer blower being configured to pull the entirety of the air-fuel mixture through the flat burner and the upstream heat exchanger.
4 more elements
Dependencies are inferred from the claim text.