초록 ▼

A flow controller system for optimally controlling the flow of air and fuel to a burner in a plurality of operating modes throughout the firing range of the burner is disclosed herein. The system includes a pair of differential pressure sensors connected across the air conduit and the burner, and th

A flow controller system for optimally controlling the flow of air and fuel to a burner in a plurality of operating modes throughout the firing range of the burner is disclosed herein. The system includes a pair of differential pressure sensors connected across the air conduit and the burner, and the fuel conduit and the burner, as well as a pair of electrically operated air and fuel valves for controlling the pressure of the air and fuel destined for the burner. The system further includes a microprocessor control means electrically connected to both the pressure sensors and the air and fuel pressure regulating valves. Optimal air-to-fuel pressure ratios are empirically derived at each point along the firing range of the burner by means of detachably connectable flowmeters, oxygen sensors and thermocouples, and this information is stored within the memory of the microprocessor control means. The use of a microprocessor control means, in combination with a detachably connectable flowmeter and thermocouple, allows the system to be easily retrofitted onto an existing burner system without the need for installation of orifice plate-type flowmeters.

대표청구항 ▼

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

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.