Automatic control circuitry for an electrode boiler humidifier

Details Automatic control circuitry for an electrode boiler humidifier Automatic control circuitry for an electrode boiler humidifier

1987-05-05

1990-06-19

Paschall, M. H.

Electric heating

Heating devices

Combined with diverse-type art device

219486, 219483, 219508, 219501, 323236, 307 38, 307 41, H05B 102

Patent

active

049356011

ABSTRACT:
A humidifier boiler has a plurality of electrodes supplied with electric current through circuitry which includes at least one solid state switch or relay such as inverse parallel thyristors or triacs arranged to switch at zero voltage so that, when the humidifier is called upon to vary the quantity of water vapor output from the boiler through an outlet pipe in response to a control signal from a humidity controller, the control signal causes the duration of the "on" and/or "off" periods of the, or each, solid state switch or relay to be varied in order to vary the power to the electrodes.

REFERENCES:
patent: 3944785 (1976-03-01), Eaton-Williams
patent: 4046991 (1977-09-01), Sefton et al.
patent: 4410794 (1983-10-01), Williams
patent: 4511790 (1985-04-01), Kozak
patent: 4588875 (1986-05-01), Kozak et al.
patent: 4617453 (1986-10-01), Kumon

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