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US 10,753,607 B2Granted
Apparatus and method for sound reduction of high efficiency furnaces
AssigneeLennox Industries Inc.
InventorsLeonor Beakley, Leonard J. Cook, David Chilson
Life of this patent
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Abstract
A sound level reducing apparatus and method for reducing the outdoor sound level produced by a high efficiency gas furnace. The apparatus comprising a muffler having an internal length determined by an identified target pure tone frequency producing an undesirable sound level. The internal length may be optimized to reduce the sound level across a range of operational frequencies.
Claims8
A high efficiency gas furnace, comprising:
- a heat exchange assembly connected to a burner assembly;
- a draft inducer assembly connected to the heat exchange assembly;
- a flue extending from the draft inducer assembly connected to a vertically oriented muffler;
- wherein the muffler further comprises:
- a first end cap connected to a shell;
- a second end cap connected to the shell;
- a first connecting pipe connected to the first end cap;
- a second connecting pipe connected to the second end cap, where the first connecting pipe is spaced a distance from the second connecting pipe;
- a wire mesh connected to the first connecting pipe and connected to the second connecting pipe;
- insulation wrapped around and abutting the wire mesh;
- wherein the muffler has a length determined by a targeted frequency produced by the draft inducer assembly and wherein the distance is determined by the targeted frequency produced by the draft inducer assembly and the length is determined by the distance.
8 more elements
Dependencies are inferred from the claim text.