Noise reduction plate in gas fired combustion systems

Abstract

A noise reduction plate for a thermal transfer device can include a body having plurality of apertures. The noise reduction plate is installed in the distribution channel of a premix blower and reduces ignition noise.

What is claimed is: 
     
         1 . A noise reduction plate assembly for a thermal transfer device, wherein the noise reduction plate assembly comprises:
 a premix blower comprising an air intake and a fuel intake;   a distribution channel connected to the premix blower; and   a noise reduction plate positioned within the distribution channel, wherein the noise reduction plate comprises a plurality of apertures spaced asymmetrically in the noise reduction plate.   
     
     
         2 . The noise reduction plate assembly of  claim 1 , wherein the plurality of apertures are the same shape. 
     
     
         3 . The noise reduction plate assembly of  claim 1 , wherein at least one of the plurality of apertures is a different shape than another one of the plurality of apertures. 
     
     
         4 . The noise reduction plate assembly of  claim 1 , wherein the plurality of apertures are each the same size. 
     
     
         5 . The noise reduction plate assembly of  claim 1 , wherein at least one of the plurality of apertures is a different size than another one of the plurality of apertures. 
     
     
         6 . The noise reduction plate assembly of  claim 1 , wherein there are 2-500 apertures. 
     
     
         7 . A boiler system, wherein the boiler system comprises:
 a premix blower comprising an air intake and a fuel intake;   a manifold;   a distribution channel fluidly connecting an outlet of the premix blower to an input of the manifold;   a burner fluidly connected to an outlet of the manifold;   a combustion chamber fluidly connected to the burner;   a water inlet;   a heat exchanger comprising a plurality of heat exchanger tubes configured to receive heated gases from the combustion chamber and wherein the heat exchanger is fluidly connected to the water inlet such that water from the water inlet moves through the heat exchanger and outside of the heat exchanger tubes;   a hot water outlet connected to the heat exchanger configured to receive heated water from the heat exchanger;   an exhaust fluidly connected to the heat exchanger tubes; and   a noise reduction plate comprising a plurality of apertures spaced asymmetrically in the noise reduction plate, wherein the noise reduction plate is positioned between an outlet of the premix blower and the input of the manifold.   
     
     
         8 . The boiler system of  claim 7 , wherein the noise reduction plate is located within the distribution channel. 
     
     
         9 . The boiler system of  claim 7 , wherein the plurality of apertures are the same shape. 
     
     
         10 . The boiler system of  claim 7 , wherein at least one of the plurality of apertures is a different shape than another one of the plurality of apertures. 
     
     
         11 . The boiler system of  claim 7 , wherein the plurality of apertures are the same size. 
     
     
         12 . The boiler system of  claim 7 , wherein at least one of the plurality of apertures is a different size than another one of the plurality of apertures. 
     
     
         13 . A pre-mixed combustion system, wherein the pre-mixed combustion system comprises:
 a premix blower comprising an air intake and a fuel intake;   a mixing chamber;   a distribution channel fluidly connecting an outlet of the premix blower to the mixing chamber;   a burner fluidly connected to the mixing chamber;   a heat exchanger comprising a plurality of heat exchanger tubes;   an exhaust fluidly connected to the heat exchanger; and   a noise reduction plate comprising a plurality of apertures, wherein at least one of the plurality of apertures is a different size than another one of the plurality of apertures, and   wherein the noise reduction plate is positioned between an outlet of the premix blower and an inlet of the mixing chamber.   
     
     
         14 . The pre-mixed combustion system of  claim 13 , wherein the mixing chamber comprises a manifold. 
     
     
         15 . The pre-mixed combustion system of  claim 13 , wherein the noise reduction plate is located within the distribution channel. 
     
     
         16 . The pre-mixed combustion system of  claim 13 , wherein at least one of the plurality of apertures is a different shape than another one of the plurality of apertures. 
     
     
         17 . The pre-mixed combustion system of  claim 13 , wherein the plurality of apertures are spaced symmetrically in the noise reduction plate. 
     
     
         18 . The pre-mixed combustion system of  claim 13 , wherein the plurality of apertures are spaced asymmetrically in the noise reduction plate. 
     
     
         19 . The pre-mixed combustion system of  claim 13 , wherein the pre-mixed combustion system is a furnace. 
     
     
         20 . The pre-mixed combustion system of  claim 13 , wherein the pre-mixed combustion system is a boiler.