Independent burner ignition and flame-sense functions
OwnerRaymond M. Paciorekinventor
Life of this patent
Estimating the term…
Abstract
An ignition/reignition circuit (10) for a gas burner (12) having separate flame sensing and ignition electrodes. The flame sensing electrode (25,30) trips a switch (Q1) upon transition from sensor output signals indicative of the sensed presence of a flame to a sensed absence. The switch is coupled to a spark generator circuit which includes a spark electrode (16) for reigniting the burner in the event of flame failure.
Claims21
A circuit for monitoring the presence of a flame produced by a gas burner and for reigniting the burner in the event of flame failure, said circuit comprising:
- a source of electrical current;
- a flame sensor for monitoring a flame produced at said burner and for outputting an electrical signal indicative of the sensed Presence or absence of said flame, wherein said flame sensor includes at least two electrodes disposed in a spaced relationship about the periphery of said burner and positioned so as to contact a flame produced thereby;
- a switch circuit for receiving said sensor output signal and, in response to a sensor output signal indicative of the sensed absence of a flame, outputting a triggering signal of limited duration;
- a spark generator circuit for producing a series of sparks to reignite said burner;
- and
- a disabling circuit for disabling said spark generator in response to the termination of receipt of a triggering signal from said switch circuit.
A circuit for monitoring the presence of a flame produced by a gas burner and for reigniting the burner in the event of flame failure, said circuit comprising:
- a source of electrical current;
- a flame sensor for monitoring a flame produced at said burner and for outputting an electrical signal indicative of the sensed presence or absence of said flame;
- wherein said flame sensor includes at least two electrodes disposed in a spaced relationship about the periphery of said burner and positioned so as to contact a flame produced thereby,
- a switch circuit for receiving said sensor output signal and, in response to a sensor output signal indicative of the sensed absence of a flame, outputting a triggering signal;
- a spark generator circuit for producing a series of sparks to reignite said burner;
- and
- a disabling circuit for disabling said spark generator in response to the absence of receipt of a triggering signal from said switch circuit, and
- an additional switch circuit for each additional flame sensing electrode.
A circuit for monitoring the presence of a flame produced by a gas burner and for reigniting the burner in the event of flame failure, said circuit comprising:
- a source of electrical current;
- a flame sensor for monitoring a flame produced at said burner and for outputting an electrical signal indicative of the sensed presence or absence of said flame;
- a switch circuit for receiving said sensor output signal and, in response to a sensor output signal indicative of the sensed absence of a flame, outputting a triggering signal;
- a spark generator circuit for producing a series of sparks to reignite said burner;
- and
- a disabling circuit for disabling said spark generator in response to the absence of receipt of a triggering signal from said switch circuit;
- and
- wherein the switch circuit enables the spark generator circuit in the presence of a triggering signal and enables the disabling circuit upon termination of the triggering signal;
- and
- wherein said flame sensor includes at least two electrodes disposed in a spaced relationship about the periphery of said burner and positioned so as to contact a flame produced thereby.
Dependencies are inferred from the claim text.