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System and process for controlling the flow of air and fuel to a burner

  • US 4,645,450 A
  • Filed: 08/29/1984
  • Issued: 02/24/1987
  • Est. Priority Date: 08/29/1984
  • Status: Expired due to Fees
First Claim
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1. A flow controller system capable of controlling the flow of air and fuel to a burner in a plurality of operating modes throughout the firing range of the burner, wherein said air and fuel are conducted to said burner by separate conduits fluidly connected to said burner, comprising:

  • (a) an air flow indicating means including a differential pressure sensing means fluidly connected across the air conduit and the burner for sensing the pressure drop of the air flow across the burner and generating a signal indicative of the rate of air flow into the burner;

    (b) first and second valves for modulating the flow of air and fuel, respectively, to the burner which are fluidly connected upstream of the air flow indicating means;

    (c) a fuel flow indicating means for generating a signal indicative of the rate of fuel flow into the burner, and(d) a control means operatively and separately connected to both the first and second valves and the fuel and air flow indicating means for maintaining selected air and fuel flow rates throughout the firing range of the burner by comparison with precalibrated air and fuel flow ratios, wherein said control means is adjustable at all points throughout the firing range of the burner.

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