Gas burner system for a plurality of gas types

Abstract

The present invention is a system that utilizes high pressure gas (greater than ½ psig) to control flow rate and gas discharge velocity to enable interchangeability between a plurality of gases without having to change the gas/air mixing venturi size or air opening. A new approach is to use the available incoming higher gas pressure to the appliance then control the volumetric flow rate with the first orifice and then use a second orifice to change the velocity of discharge into the gas/air mixing venturi of the burner and therefore have adjustability of gas air mixing conditions without having to change the burner system or air flow control even when changing between very different fuel gases.

What is claimed is: 
     
         1 . A gas burner system for receiving a gas at a pressure higher than ½ psig comprising:
 a first orifice including a diameter hole of specific size to control the volumetric flow rate of a specified fuel gas; 
 a second orifice including a specific size to control the discharge velocity of the gas, the first orifice fluidly connected to the second orifice; 
 a burner adapted to burn a gas/air mixture; and 
 a gas/air mixing venturi, including an air intake opening adapted to receive the gas discharged from the second orifice and air and adapted to uniformly mix the air and the gas for the gas/air mixture. 
 
     
     
         2 . The gas burner system of  claim 1 , wherein the first orifice is connected to the outlet of a gas valve. 
     
     
         3 . The gas burner system of  claim 1 , wherein the first orifice is connected to the inlet of a gas valve. 
     
     
         4 . The gas burner system of  claim 1 , wherein both the first and second orifices each include a small opening and a larger opening. 
     
     
         5 . The gas burner system of  claim 4 , wherein the small opening of the first orifice is smaller than the small opening of the second orifice. 
     
     
         6 . The gas burner system of  claim 5 , wherein the small opening of the second orifice is oriented such that it is closer to the gas/air mixing venturi than the larger opening of the second orifice. 
     
     
         7 . The gas burner system of  claim 1 , wherein the second orifice is adapted to entrain air through the air intake opening due to the velocity of the gas entering the gas/air mixing venturi. 
     
     
         8 . The gas burner system of  claim 1 , wherein the first orifice includes a fitting comprising a plurality of holes which are adapted to be mechanically plugged, each of the plurality of holes comprising a diameter for respective use with one of a plurality of fuel gases. 
     
     
         9 . The gas burner system of  claim 1  whereby the first orifice fitting has a plurality of holes which can be mechanically plugged to enable use of a plurality of gas pressures for a single fuel. 
     
     
         10 . The gas burner system of  claim 1  whereby the fuel gas conversion is accomplished by only changing the first and second orifices, but without alteration to the gas/air mixing venturi. 
     
     
         11 . The gas burner system of  claim 1 , wherein there is no draft inducer for combustion air. 
     
     
         12 . The gas burner system of  claim 1 , further comprising a draft inducer for combustion air. 
     
     
         13 . The gas burner system of  claim 1 , further comprising a plurality burners, each of the plurality of burners including a second orifice fluidly connected with the first orifice. 
     
     
         14 . A gas burner system for receiving a gas with a pressure higher than ½ psig, comprising:
 a fitting including a first orifice, the first orifice including a first end and a second end, the second end including a diameter hole of specific size to control the volumetric flow rate of a specified fuel gas; 
 a burner assembly comprising:
 a gas connection device spaced apart and separate from the first orifice; 
 a second orifice positioned within the gas connection device and fluidly connected to the first orifice, the second orifice including a specific size to control the discharge velocity of the gas passing therethrough; 
 a gas/air mixing venturi including an air intake opening positioned to receive the gas discharged from the second orifice and air, the gas/air mixing venturi adapted to uniformly mix the air and the gas; and 
 a burner, wherein the second orifice is positioned within the gas connection device, the second orifice is a specific size to control the discharge velocity of the gas into the gas/air mixing venturi; 
 a hollow tube ( 3 ) including a first end engaging the first orifice and a second end engaging the gas connection device, the first end of the first orifice is in fluid communication with the gas flow into the system, 
 wherein the second end of the hollow tube is positioned within the gas connection device and wherein the hollow tube physically separates the first orifice and the gas connection device. 
 
 
     
     
         15 . The gas burner system according to  claim 14 , wherein the first orifice has a small opening and a larger opening. 
     
     
         16 . The gas burner system according to  claim 14 , wherein the second orifice has a small opening and a larger opening. 
     
     
         17 . The gas burner system according to  claim 14 , further comprising a gas valve, wherein the first orifice is connected to the gas valve. 
     
     
         18 . The gas burner system according to  claim 14 , wherein the fitting comprises a single disc which is mechanically held in place in one of before and after a gas valve. 
     
     
         19 . The gas burner system according to  claim 14 , wherein the fitting comprises a plurality of first orifices and each of the plurality of first orifices is sized to control the volumetric flow rate of a respective fuel gas.