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US 11,162,677 B2Granted
Air intake coupling with noise suppression for low NOx emission furnace
AssigneeLennox Industries Inc.
InventorsLeonor Beakley, Darcy Q. Easterling
Life of this patent
Estimating the term…
Abstract
An air intake coupling has at least one noise suppression hole formed therein. A gas-air mixer elbow is fluidly coupled to the air intake coupling. A burner box assembly is fluidly coupled to the gas-air mixer elbow via a gas-air plenum box. A heat-exchange tube has a first end that is fluidly coupled to the burner box assembly. A fan is fluidly coupled to a second end of the heat-exchange tube via a cold-end header box.
Claims20
A furnace comprising;
- an air intake coupling, the air intake coupling having at least one noise suppression hole formed therein, the air intake coupling comprises a first tubular section and a second tubular section, wherein a diameter of the first tubular section is larger than a diameter of the second tubular section, wherein the first tubular section and the second tubular section each comprise a circular cross-section;
- wherein the at least one noise suppression hole comprises a first noise suppression hole and a second noise suppression hole formed on opposite sides of the second tubular section;
- a gas-air mixer elbow fluidly coupled to the air intake coupling;
- a burner box assembly fluidly coupled to the gas-air mixer elbow via a gas-air plenum box;
- a heat-exchange tube having a first end fluidly coupled to the burner box assembly;
- a fan fluidly coupled to a second end of the heat-exchange tube via a cold-end header box;
- and
- a pressure tap formed in the first tubular section, wherein the first noise suppression hole is in line with the pressure tap.
5 more elements
A method of manufacturing a furnace, the method comprising:
- forming a tubular air intake coupling, the air intake coupling comprises a first tubular section and a second tubular section, wherein a diameter of the first tubular section is larger than a diameter of the second tubular section, wherein the first tubular section and the second tubular section each comprise a circular cross-section;
- forming at least one noise suppression hole in the air intake coupling, wherein the at least one noise suppression hole comprise a first noise suppression hole and a second noise suppression hole formed on opposite sides of the second tubular section;
- forming a pressure tap in the first tubular section, wherein the first noise suppression hole is in line with the pressure tap;
- fluidly coupling the air intake coupling to a gas-air mixer elbow;
- fluidly coupling the gas-air mixer elbow to a burner box assembly via a gas-air plenum box;
- fluidly coupling a first end of a heat-exchange tube to the burner box assembly;
- and
- fluidly coupling a second end of the heat-exchange tube to a fan via a cold-end header box.
5 more elements
A furnace comprising;
- an air intake coupling, the air intake coupling having at least one noise suppression hole formed therein, the air intake coupling comprises a first tubular section and a second tubular section, wherein a diameter of the first tubular section is larger than a diameter of the second tubular section, wherein the first tubular section and the second tubular section each comprise a circular cross-section;
- wherein the at least one noise suppression hole comprises a first noise suppression hole and a second noise suppression hole formed on opposite sides of the second tubular section;
- a gas-air mixer elbow fluidly coupled to the air intake coupling;
- a burner box assembly fluidly coupled to the gas-air mixer elbow via a gas-air plenum box;
- a heat-exchange tube having a first end fluidly coupled to the burner box assembly;
- a fan fluidly coupled to a second end of the heat-exchange tube via a cold-end header box;
- and
- a flange formed on an end of the first tubular section on a side opposite the second tubular section.
5 more elements
Dependencies are inferred from the claim text.