초록 ▼

An ionic flame monitor. The flame monitor has a flame rod that produces an ionization current when the flame rod is immersed in a flame and excited by a voltage. The ionization current has a DC component and an AC component each dependent on the intensity of the flame, and a flicker frequency. The f

An ionic flame monitor. The flame monitor has a flame rod that produces an ionization current when the flame rod is immersed in a flame and excited by a voltage. The ionization current has a DC component and an AC component each dependent on the intensity of the flame, and a flicker frequency. The flame monitor also has a computing device that is responsive to signals representative of the flicker frequency, and the AC and DC components of the ionization current for determining the existence of the flame.

대표청구항 ▼

1. An ionic flame monitor comprising:a. a flame rod that produces an ionization current when the flame rod is immersed in a flame and excited by a voltage, said ionization current having a DC component and an AC component each dependent on the intensity of said flame, and a flicker frequency; b. a c

1. An ionic flame monitor comprising:a. a flame rod that produces an ionization current when the flame rod is immersed in a flame and excited by a voltage, said ionization current having a DC component and an AC component each dependent on the intensity of said flame, and a flicker frequency; b. a computing device having at least first, second and third inputs; c. a first circuit connected to said first input of said computing device, said first circuit responsive to said ionization current for producing at said first input an AC signal representative of said flicker frequency; d. a second circuit connected to said second input of said computing device, said second circuit responsive to said ionization current for producing at said second input a signal having an amplitude proportional to said ionization current AC component; and e. a third circuit connected to said third input of said computing device, said third circuit responsive to said ionization current for producing at said third input a signal which is related to said ionization current DC component; said computing device responsive to said signals at said first, second and third computing device inputs for determining the existence of said flame.