Apparatus for providing an air/fuel mixture to a fully premixed burner
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United States of America Patent
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-
Dec 7, 1999
Grant Date -
N/A
app pub date -
Nov 20, 1997
filing date -
Feb 16, 1995
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Apparatus provides an air/fuel mixture to a fully premixed burner and comprises means for providing fuel at a variable flow rate to the burner, means for supplying air at a variable flow rate to the fuel to form the mixture, means for sensing aeration of the fuel combustion products and control means for controlling the fuel flow rate in dependence upon a heat output demand and the air flow rate in dependence upon both the fuel flow rate and the sensed aeration in such a way that the air flow rate is sufficient to maintain the aeration at a predetermined value, the controller, in use, maintaining the fuel flow rate at one of a number of predetermined values and the air flow rate at a corresponding one of a number of differing predetermined values, each set of predetermined values being characterized by a constant value of the ratio between successive values.
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