Glow discharge heating apparatus

Details Glow discharge heating apparatus Glow discharge heating apparatus

1980-05-22

1983-10-18

Paschall, M. H.

Electric heating

Heating devices

Electric arc-type devices

219121P, 219121PT, H01S 3097, B23K 900

Patent

active

044107927

ABSTRACT:
Typically, a bottom of a cup-shaped electrode opposes to that of a similar electrode through a predetermined gap and in a mixture of helium and hydrogen. A step-up transformer connected across an AC source through a resistor applies a voltage in excess of a discharge breakdown voltage for the gap across the electrodes to cause a pilot glow discharge between them before the source voltage reaches a glow hold minimum voltage for the electrodes. A rectified voltage resulting from a transformer connected across the resistor turns a bidirectional triode thyristor on to apply the source voltage across the electrodes through the conducting thyristor. This smoothly transits the pilot glow discharge to a glow discharge between the electrodes. The latter discharge heats a liquid forcedly flowing along inner surfaces of the electrodes. Also an auxiliary electrode can be operatively coupled to the electrodes to cause similarly a pilot glow discharge between it and either one of the electrodes. For a DC source a tubular anode surrounds a middle portion of a tubular cathode through which a liquid flows.

REFERENCES:
patent: 3831052 (1974-08-01), Knechtli
patent: 4085386 (1978-04-01), Farish et al.

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