Flame sensing voltage dependent on application
First Claim
Patent Images
1. A system for optimal flame sensing, comprising:
- a flame sensor;
a variable voltage supply connected to the flame sensor; and
a processor connected to the flame sensor and the variable voltage supply; and
wherein;
the flame sensor measures a flame with greater precision with increased voltage applied to the flame sensor; and
the processor determines whether a flame measurement requires greater precision with an increase of voltage provided by the variable voltage supply to the flame sensor.
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Abstract
A system for operating a flame sensing device to obtain readings of increased accuracy without degrading the life of the sensor. There may be levels of a flame requiring a precise measurement. One improvement of accuracy uses higher voltage on the sensor, but this degrades the sensor and thus shortens it life. Further improvement may be achieved by limiting the time that the sensor is operated at a higher voltage. Readings, as if the sensor were operated at a higher voltage, may be inferred from actual readings of the sensor operated at a lower voltage.
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Citations
20 Claims
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1. A system for optimal flame sensing, comprising:
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a flame sensor; a variable voltage supply connected to the flame sensor; and a processor connected to the flame sensor and the variable voltage supply; and wherein; the flame sensor measures a flame with greater precision with increased voltage applied to the flame sensor; and the processor determines whether a flame measurement requires greater precision with an increase of voltage provided by the variable voltage supply to the flame sensor. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for optimal flame sensing, comprising:
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taking a first flame reading of a flame at a given level with a flame sensor at a first voltage; and taking a second flame reading of the flame at the given level with the flame sensor at a second voltage; and wherein; the second voltage is greater than the first voltage; and accuracy of a flame reading is a function of a voltage connected to the flame sensor, the greater the voltage within a certain range, the more accurate is the flame reading. - View Dependent Claims (8, 9, 10)
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11. A system for providing flame sensing, comprising:
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a flame sensing device for providing measurements of a flame; and a processor connected to the flame sensing device for receiving measurements of the flame and for controlling voltage at the flame sensing device; and wherein; an amount of time that a voltage higher than a nominal voltage is applied to the flame sensing device is minimized; and the processor determines the nominal voltage at least in part from properties of the flame. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification