US 12,235,012 B2
Sound attenuation for HVAC devices
Yogesh Pandit, Bengaluru (IN); Richard L. Jameson, Tyler, TX (US); Zubin Varghese, Bangalore (IN); John Bailey, Tyler, TX (US); Lance Lindenburg, Tyler, TX (US); Thomas Gort, Tyler, TX (US); Shiva Prasad Keralapura Basavaraju, Tyler, TX (US); Kevin Joseph Ligi, Whitehouse, TX (US); Chris Fuller, Blacksburg, VA (US); and Curtis Mitchell, Manasass, VA (US)
Assigned to Trane International Inc., Davidson, NC (US)
Filed by Trane International Inc., Davidson, NC (US)
Filed on Jun. 27, 2023, as Appl. No. 18/342,276.
Application 18/342,276 is a continuation of application No. 17/219,639, filed on Mar. 31, 2021, granted, now 11,725,846.
Prior Publication US 2023/0408142 A1, Dec. 21, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F24F 13/24 (2006.01)
CPC F24F 13/24 (2013.01) [F24F 2013/242 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An improved furnace comprising:
a housing comprising a combustion air chamber, a heat exchanger chamber, and a circulation blower chamber, wherein the combustion air chamber comprises a burner assembly and a combustion air fan;
a sound attenuation layer comprising an acoustic metamaterial layer tuned to attenuate sound for a frequency band, wherein the frequency band includes a frequency of operation of at least one of the burner assembly and the combustion air fan, and wherein the sound attenuation layer is coupled to a portion of the combustion air chamber; and
one or more housing openings fluidly connecting the combustion air chamber to an environment outside the housing, wherein each of the one or more housing openings provides less attenuation of sound emanating from within the combustion air chamber than the housing,
wherein the sound attenuation layer includes a discontinuous section that aligns with one or more of the housing openings.